Full-Chain Service: From Design to Operation, Xinhai Guards Tanzania Gold Project

 The construction and operation of a large-scale gold mineral processing plant is a complex systematic project involving multiple links such as design, equipment manufacturing, construction installation, commissioning and trial operation, and long-term operation management. For mining customers, coordinating the cooperation of various links and ensuring the smooth progress of the project is a huge challenge. Xinhai Mining, with its mature EPC+M+O full-chain service mode, has solved this problem for customers in the Tanzania 1,200t/d gold mineral processing plant project. From the initial detailed design to the later long-term operation management, Xinhai provides one-stop, full-process professional services, guarding the project’s every link and ensuring the project’s early commissioning, stable operation and good economic benefits.

The detailed design is the foundation of the project’s success, and Xinhai attached great importance to the design link of the Tanzania project. The ore of the project has unique properties—sulfide ore and oxide ore coexist, with large differences in grade and leaching difficulty. Xinhai’s design team conducted a comprehensive and in-depth ore property analysis and mineral processing test before the design, mastering the key technical parameters such as the embedded particle size of gold, the grindability of ore and the leaching characteristics. Based on the test results and combined with the local actual conditions of Tanzania and the customer’s production requirements, the design team formulated a detailed and scientific overall design scheme.

The design scheme covers process flow design, plant layout design, equipment configuration design, water supply and drainage system design, power supply and distribution system design, environmental protection and safety design and other aspects. In the process flow design, the all-slime cyanidation process was determined to ensure the high leaching rate of two types of ore; in the plant layout design, the rational layout was carried out according to the production process and local land conditions, reducing the material transportation distance and improving the production efficiency; in the equipment configuration design, advanced, efficient and energy-saving equipment was selected to adapt to the local power supply and maintenance conditions. Every design detail fully considers the actual needs of the project and the long-term development of the customer, laying a solid foundation for the subsequent project implementation.

After the completion of the design scheme, Xinhai entered the equipment manufacturing and procurement link. As a mineral processing complete solution provider with its own equipment manufacturing capacity, Xinhai independently produced core equipment such as ball mills, cyclones and cyanidation leaching tanks required for the project, strictly controlling the manufacturing quality through a strict quality inspection system. For some general auxiliary equipment, Xinhai procured from well-known suppliers at home and abroad, ensuring the quality and reliability of the equipment. At the same time, Xinhai’s logistics team formulated a scientific transportation plan to ensure that the equipment could be delivered to the project site safely and on time.

The construction and equipment installation link is the key to transforming the design scheme into a real plant. Xinhai sent a professional construction team and installation team with rich overseas project experience to the Tanzania project site. The construction team strictly constructed in accordance with the design drawings and construction specifications, paying attention to the construction quality and safety in every link. The installation team, with professional skills and rich experience, carried out standardized and precise equipment installation, ensuring the accurate installation position and stable operation of the equipment. The project management team carried out real-time supervision and coordination, solving the problems encountered in the construction and installation process in a timely manner, ensuring the smooth progress of the work.

After the completion of construction and installation, Xinhai entered the equipment commissioning and trial operation link. The professional commissioning team formulated a detailed commissioning plan, carrying out commissioning step by step from single equipment commissioning to system commissioning, and then to the whole plant trial operation. In the commissioning process, the team carefully debugged the operating parameters of each equipment, making the equipment reach the best operating state, and optimized the process parameters according to the actual operation situation, ensuring that the leaching rate and production capacity of the plant reach the design requirements. During the trial operation, Xinhai’s technical team was stationed at the site to track the operation of the plant in real time, collect operation data, and solve potential problems in a timely manner.

The full-chain service of Xinhai does not end with the completion of the trial operation. Xinhai also provides long-term operation management and technical support services for the project. The professional operation management team formulates scientific operation plans, optimizes the production process, and ensures the stable operation of the plant and the maximization of economic benefits. The technical support team provides regular technical training and on-site guidance for the customer’s operation personnel, solves the technical problems encountered in the operation process, and provides technical upgrades and transformations according to the customer’s development needs. Xinhai’s perfect after-sales service system ensures that the customer can get timely and professional support in the long-term operation process.

From design to operation, Xinhai’s full-chain service runs through the whole life cycle of the Tanzania 1,200t/d gold project. This integrated service mode not only reduces the customer’s project risk and operation cost, but also ensures the project’s stable operation and good economic benefits. Xinhai’s professional service and responsible attitude have won high praise from the customer, and also laid a solid foundation for its further expansion in the East African mining market.

Adapting to Local Conditions: Xinhai’s Project Management in Tanzania Gold Plant

 Undertaking overseas mineral processing projects requires not only strong technical strength and rich project experience, but also the ability to adapt to local conditions and solve various problems brought by differences in regional environment, policies, culture and resources. The Tanzania 1,200t/d gold mineral processing plant project undertaken by Xinhai Mining is located in East Africa, with unique regional characteristics and challenges. Xinhai, relying on its mature overseas project management system and flexible adaptation ability, carried out scientific and refined project management, successfully overcoming various difficulties, ensuring the smooth progress of the project and the stable operation of the plant, and interpreting the concept of "adapting to local conditions" with practical actions.

Tanzania’s natural environment and infrastructure conditions are important factors affecting the project construction. The project site is located in a remote area with relatively backward transportation and power supply conditions, which brings great challenges to the transportation of construction materials and equipment, and the stable supply of power during the construction and operation period. In view of this, Xinhai’s project management team formulated a targeted logistics and power supply plan in the early stage of the project.

In terms of logistics transportation, Xinhai established a special logistics team, which fully investigated the local transportation routes and transportation capacity, and selected reliable local logistics partners. For large-scale and heavy-weight core equipment such as ball mills and crushers, Xinhai adopted the mode of sea transportation + land transportation, and made detailed transportation plans, including the handling of customs clearance procedures, the reinforcement of transportation vehicles and the selection of routes, to ensure that the equipment could be transported to the project site safely and on time. For construction materials, Xinhai gave priority to selecting local qualified suppliers to reduce transportation costs and shorten the transportation cycle, while ensuring the quality of materials.

In terms of power supply, considering the instability of local power grid, Xinhai configured a backup generator set for the project to ensure that the construction and operation work can be carried out normally in case of power outage. At the same time, Xinhai optimized the power consumption design of the plant, adopted energy-saving equipment and technologies, reduced the power consumption of the plant, and adapted to the local power supply capacity. In addition, Xinhai also carried out maintenance and maintenance training for the power supply system for local personnel to ensure the stable operation of the power supply system.

Tanzania’s policies and regulations on mining and environmental protection are relatively strict, which puts forward higher requirements for the project’s compliance. Xinhai’s project management team conducted in-depth research on Tanzania’s mining law, environmental protection law and other relevant policies and regulations in the early stage of the project, and integrated the requirements of policies and regulations into every link of project design, construction and operation.

In terms of environmental protection, Xinhai adopted a series of environmental protection measures to ensure that the project meets local environmental protection standards. In the crushing and grinding stages, professional dust removal equipment was installed to reduce dust emission; in the cyanidation leaching stage, a complete cyanide-containing wastewater treatment system was built to treat the wastewater to meet the discharge standards before discharge or recycling; in the tailings treatment stage, the thickening and dewatering process was adopted to reduce the volume of tailings, and the tailings yard was built in accordance with environmental protection requirements to prevent tailings from polluting the soil and water sources. Xinhai also regularly submitted environmental monitoring reports to the local environmental protection department to accept supervision.

In terms of personnel management, Xinhai attached great importance to the employment and training of local personnel, which not only reduced the project’s labor cost, but also promoted the local employment and talent training. Xinhai recruited a large number of local construction workers, operation and maintenance personnel and management personnel, and carried out strict pre-job training for them, including safety training, technical training and operation training. The training content was combined with the actual needs of the project, and the training method adopted on-site teaching and hands-on operation to ensure that the local personnel could quickly master the relevant skills and take up their posts.

At the same time, Xinhai respected the local culture and customs, formulated a humanized personnel management system, and established a good cooperative relationship with local personnel. The project management team communicated with local personnel in a timely manner, solved their work and life problems, and enhanced the cohesion and centripetal force of the team. This not only ensured the smooth progress of the project, but also won a good social reputation for Xinhai in Tanzania.

Xinhai’s project management in the Tanzania 1,200t/d gold project fully reflects the concept of "adapting to local conditions". By solving the problems of logistics, power supply, policy compliance and personnel management in a targeted manner, Xinhai ensured the smooth implementation and long-term stable operation of the project, demonstrating its strong overseas project management capability. This successful practice also provides valuable experience for Xinhai to undertake more overseas mineral processing projects in the future.

Detailed Interpretation of Production Stages: Ensuring Efficient Operation of Tanzania Gold Plant

 The Tanzania 1,200t/d gold mineral processing plant, as a large-scale EPC+M+O project undertaken by Xinhai, has a complete and scientific production process, which is divided into four core stages: crushing, grinding and classification, separation (all-slime cyanidation), and tailings treatment. Each stage is closely connected and mutually supportive, forming a complete production system. The rational design and strict control of each production stage are the key to ensuring the plant’s 1,200t/d production capacity, high leaching rate and stable operation. This article will interpret each production stage in detail, showing Xinhai’s professional design and refined management in the project.

The crushing stage is the first link of the entire mineral processing process, responsible for breaking large raw ore into small particles that meet the requirements of the grinding stage. The Tanzania project adopts an open-circuit crushing process, which is a scientific choice based on the characteristics of the raw ore and the project’s production scale. The raw ore mined from the mine has a large particle size, generally up to several meters, which cannot be directly entered into the mill for grinding. The open-circuit crushing process is composed of multiple crushers, which break the raw ore step by step from coarse to fine.

In the crushing stage, Xinhai selected advanced and efficient crushing equipment according to the hardness and particle size of the raw ore, ensuring the crushing efficiency and product quality. The first stage of crushing uses a jaw crusher to break large raw ore into coarse ore with a particle size of less than 300mm; the second stage uses a cone crusher to further crush the coarse ore into medium ore with a particle size of less than 50mm; the third stage uses a impact crusher to crush the medium ore into fine ore with a particle size of less than 10mm, which meets the feeding requirements of the grinding stage. The open-circuit crushing process has the advantages of simple flow, high crushing efficiency and low energy consumption, which is very suitable for large-scale production. At the same time, Xinhai equipped the crushing workshop with professional dust removal equipment to reduce dust pollution and meet the local environmental protection requirements.

The grinding and classification stage is the core link to realize the dissociation of gold particles, which directly affects the subsequent leaching effect. The Tanzania project adopts a one-stage closed-circuit grinding and cyclone classification process, which is an advanced grinding and classification mode in the current mineral processing industry. The closed-circuit grinding means that the ore after grinding is sent to the cyclone for classification, and the unqualified coarse-grained ore is returned to the mill for regrinding, while the qualified fine-grained ore enters the subsequent cyanidation leaching stage. This cycle ensures that the grinding product has a uniform particle size and sufficient dissociation of gold particles.

Xinhai selected a large-scale energy-saving ball mill for the grinding stage, which has the advantages of high grinding efficiency, low energy consumption and stable operation, and can meet the grinding demand of 1,200t/d ore. The cyclone used in the classification stage has the characteristics of high classification efficiency and accurate classification, which can effectively separate coarse and fine ore particles. The technical team of Xinhai optimized the matching parameters of the mill and cyclone through experiments, determined the optimal grinding concentration and classification efficiency, and ensured that the particle size of the grinding product reaches -200 mesh accounting for more than 85%, laying a solid foundation for the subsequent all-slime cyanidation leaching.

The separation stage adopts the all-slime cyanidation process, which is the core link of gold extraction. The qualified ore pulp after grinding and classification is sent to the cyanidation leaching tank, and cyanide solution and lime are added to carry out the leaching reaction. The lime is used to adjust the pH value of the pulp to prevent the cyanide from being decomposed and improve the leaching effect. During the leaching process, the aeration device continuously aerates the pulp to promote the reaction between gold particles and cyanide solution, so that the gold is dissolved into the solution to form gold cyanide complex.

After the cyanidation leaching, the gold-bearing solution is adsorbed by activated carbon to obtain gold-bearing carbon, which then enters the desorption electrolysis system. The desorption electrolysis system uses high temperature and high pressure to desorb the gold from the activated carbon, and then obtains gold mud through electrolysis. The gold mud is smelted to obtain finished gold. The tailings after cyanidation leaching are sent to the thickening and dewatering system for solid-liquid separation. The separated clear water is recycled to the production system for reuse, and the dewatered tailings are stacked in the tailings yard, realizing the harmless treatment and resource utilization of tailings.

Each production stage of the Tanzania 1,200t/d gold plant is designed and managed in a refined way, which ensures the efficient and stable operation of the plant. The close connection between the stages and the optimized process parameters make the plant’s production capacity and leaching rate reach the design requirements, providing a reliable guarantee for the project’s economic benefits. Xinhai’s professional technical strength and refined management level are fully reflected in each production stage, setting a good example for the construction of similar gold processing plants in East Africa.

All-Slime Cyanidation Process for Tanzania 1,200t/d Gold Plant

 The choice of mineral processing process is the key to determining the gold recovery rate and production efficiency of a gold processing plant, especially for the Tanzania 1,200t/d gold project with complex ore properties. The project involves two types of ore—sulfide ore with a high gold grade of 10.7g/t and oxide ore with a relatively low grade of 2.4g/t, and gold is the only valuable element. To efficiently recover gold from these two types of ore, Xinhai’s technical team经过 in-depth analysis of ore properties and a large number of experimental verifications, finally determined to adopt the all-slime cyanidation gold extraction process, which achieved excellent leaching effects—93.75% for sulfide ore and 91.58% for oxide ore, setting a high standard for gold recovery in the local area.

All-slime cyanidation is a mature and efficient gold extraction process, which is mainly suitable for processing fine-grained disseminated gold ore, oxide gold ore and sulfide gold ore after oxidation roasting. Its core principle is to fully dissociate gold particles from gangue minerals through fine grinding, and then use cyanide solution to leach gold, so as to realize the separation of gold from ore. For the Tanzania project, the all-slime cyanidation process is particularly suitable because of the fine embedded particle size of gold in both sulfide and oxide ores, which requires sufficient dissociation through grinding to ensure the leaching effect.

The reason why Xinhai chose the all-slime cyanidation process for the Tanzania project is not only based on the ore properties, but also considering the project’s production scale and economic benefits. Compared with other gold extraction processes such as gravity concentration-cyanidation combined process, the all-slime cyanidation process has the advantages of simple process flow, high gold recovery rate, stable operation and low production cost, which is very suitable for large-scale production of 1,200t/d. At the same time, the process can effectively handle both sulfide and oxide ores, avoiding the need to set up two sets of independent processing systems, which greatly reduces the project’s investment and operation cost.

To ensure the leaching effect of the all-slime cyanidation process, Xinhai made targeted optimizations in the key links of the process. First of all, in the grinding stage, a closed-circuit grinding and cyclone classification process was adopted to ensure that the ore is ground to the required particle size, so that the gold particles are fully dissociated. The particle size of the grinding product directly affects the leaching rate—if the particle size is too coarse, the gold particles cannot be fully contacted with the cyanide solution, resulting in low leaching rate; if the particle size is too fine, it will increase the viscosity of the pulp, affect the leaching efficiency and increase the energy consumption. Xinhai’s technical team determined the optimal grinding particle size through a large number of experiments, balancing the leaching effect and energy consumption.

Secondly, in the cyanidation leaching stage, Xinhai optimized the leaching parameters such as cyanide concentration, leaching time, pulp pH value and aeration rate. For sulfide ore with high gold grade, the leaching time was properly extended and the cyanide concentration was adjusted to ensure that the gold is fully leached; for oxide ore with low grade but easy leaching, the leaching parameters were optimized to improve the leaching efficiency and reduce the consumption of cyanide. At the same time, Xinhai adopted advanced leaching equipment to ensure the uniform mixing of pulp and cyanide solution, and improve the contact efficiency between gold particles and leaching agent.

The application of the all-slime cyanidation process in the Tanzania 1,200t/d gold project has achieved remarkable results. The leaching rate of sulfide ore reached 93.75% and that of oxide ore reached 91.58%, which are higher than the average level of the same type of gold projects. This not only ensures the full utilization of gold resources, but also brings considerable economic benefits to the customer. In addition, the all-slime cyanidation process adopted by Xinhai has good environmental protection performance—through the effective treatment of cyanide-containing wastewater and tailings, the environmental pollution caused by the production process is minimized, which meets Tanzania’s strict environmental protection requirements.

The successful application of the all-slime cyanidation process in the Tanzania project fully demonstrates Xinhai’s strong technical strength and ability to customize solutions according to ore properties. This process not only provides a reliable technical guarantee for the project’s stable operation and high efficiency, but also provides a valuable reference for the processing of similar gold ores in East Africa. In the future, Xinhai will continue to carry out technological innovation, optimize mineral processing processes, and provide more efficient and environmentally friendly technical solutions for global mining customers.

Tanzania 1,200t/d Gold Mineral Processing Plant: Xinhai’s EPC+M+O Success and Technological Innovation

 Tanzania, a country rich in gold resources in East Africa, has become a key market for global mining investment with its abundant mineral reserves and improving investment environment. Against this backdrop, Xinhai Mining, a leading provider of mineral processing complete solutions, successfully undertook the Tanzania 1,200t/d gold mineral processing plant project, an integrated EPC+M+O project that integrates Engineering, Procurement, Construction, Mining Management and Operation. This project, with its unique ore properties and high production scale, has become a benchmark for efficient and sustainable gold mining in Tanzania, demonstrating Xinhai’s strong comprehensive strength in the global mining service field.

The Tanzania 1,200t/d gold project is distinctive in its ore composition: it consists of sulfide ore with a gold grade of 10.7g/t and oxide ore with a gold grade of 2.4g/t, with gold as the only valuable element. This ore characteristics put forward special requirements for the mineral processing process—how to efficiently recover gold from two types of ore with very different grades and properties, while ensuring the stability of production capacity and economic benefits, has become the core challenge of the project. Xinhai, relying on its years of experience in gold mineral processing and rich overseas project practice, customized a targeted overall solution for the project, and the EPC+M+O service mode adopted in the project has laid a solid foundation for the smooth implementation and long-term operation of the project.

The EPC+M+O mode adopted in this project is an advanced service mode in the current large-scale mineral processing plant construction, which solves the pain points of customers in coordinating multiple links such as design, construction and operation. For the Tanzania project, Xinhai took full responsibility for the whole process from the initial project research, process design, equipment procurement and manufacturing, on-site construction and installation, to the later equipment commissioning, trial operation, operation management and technical support. This integrated service mode not only reduces the communication cost and project risk for customers, but also ensures the consistency and efficiency of the whole project process, enabling the project to be put into production on schedule and achieve expected benefits.

In the early stage of the project, Xinhai’s professional technical team conducted in-depth on-site investigations in Tanzania, fully understanding the local natural environment, transportation conditions, industrial supporting facilities and relevant mining policies and regulations. Tanzania has strict requirements on environmental protection and production safety in the mining industry, and Xinhai integrated environmental protection and safety concepts into every link of project design and construction. In view of the local water and electricity resources and labor conditions, Xinhai optimized the process design and equipment configuration to adapt to the local actual situation, reducing the project’s operation cost and improving the adaptability of the plant.

In the process of project implementation, Xinhai adhered to the principles of high quality, high efficiency and safety, and strictly controlled every link. The professional construction team and installation team sent by Xinhai have rich overseas project experience, and strictly constructed and installed in accordance with the design drawings and international standards, ensuring the construction quality. At the same time, Xinhai established a special project management team to track the project progress in real time, coordinate the cooperation between various teams, and solve the problems encountered in the construction process in a timely manner, ensuring the smooth progress of the project.

After the completion of the project, Xinhai continued to provide operation management and technical support services. The professional operation management team formulated scientific operation plans, optimized process parameters, and ensured the stable operation of the plant. The technical support team provided regular technical training and on-site guidance for the local operation personnel, helping them master the operation skills of equipment and process, and realizing the independent operation and management of the plant by the customer. Up to now, the Tanzania 1,200t/d gold processing plant has been operating stably, with the leaching rate of sulfide ore and oxide ore reaching 93.75% and 91.58% respectively, which has been highly recognized by the customer.

This project is not only a successful practice of Xinhai’s EPC+M+O mode in East Africa, but also a positive contribution to the development of Tanzania’s mining industry. It has introduced advanced mineral processing technology and management experience to Tanzania, promoted the technological progress of the local mining industry, created a large number of local employment opportunities, and driven the development of related industries. In the future, Xinhai will continue to uphold the concept of technological innovation and sustainable development, and provide more high-quality mineral processing solutions for global mining customers, helping more mining projects achieve efficient and green development.