Outstanding Benefits: Tanzania 1,200t/d Gold Plant’s Contribution to Economy and Industry

The ultimate goal of any mineral processing plant project is to achieve good economic benefits, while also bringing positive social and industrial benefits to the local area. The Tanzania 1,200t/d gold mineral processing plant project undertaken by Xinhai Mining has achieved remarkable technological, economic, social and industrial benefits since its operation. The plant’s stable production capacity, high leaching rate and efficient operation have not only brought considerable economic returns to the customer, but also promoted the development of Tanzania’s mining industry, created employment opportunities and driven the progress of related industries, becoming a model of win-win cooperation between Chinese mining enterprises and African countries.

The technological benefits of the project are mainly reflected in the high leaching rate and stable production capacity. The project adopts the all-slime cyanidation process customized by Xinhai, and through the optimization of each production stage, the leaching rate of sulfide ore reaches 93.75% and that of oxide ore reaches 91.58%, which are higher than the average level of the same type of gold projects in the world. This high leaching rate ensures the full utilization of gold resources, avoiding the waste of valuable elements. At the same time, the plant’s design production capacity is 1,200t/d, and after being put into operation, it quickly reached and maintained the design capacity, with stable operation. The advanced equipment configuration and scientific process design make the plant’s equipment operation rate reach more than 95%, the downtime is greatly reduced, and the overall production efficiency is significantly improved.

The remarkable economic benefits are the core embodiment of the project’s success. For the customer, the high leaching rate and stable production capacity ensure the continuous output of finished gold, and the low production cost brought by the optimized process and equipment configuration further improves the project’s profit margin. The sulfide ore of the project has a high gold grade of 10.7g/t, and the high leaching rate enables the customer to recover more gold with the same ore processing capacity, bringing considerable economic returns. In addition, Xinhai’s EPC+M+O service mode effectively shortens the project’s construction period, enabling the plant to be put into production on schedule and the customer to obtain investment returns in advance, shortening the investment recovery cycle.

For Tanzania, the project has brought positive social benefits, the most prominent of which is the promotion of local employment. The construction and operation of the plant have created a large number of local jobs, including construction workers, operation and maintenance personnel, management personnel and technical personnel, solving the employment problem of hundreds of local residents. Xinhai also carried out professional technical training for local personnel, helping them master the skills of mineral processing equipment operation, process adjustment and equipment maintenance, improving their employment ability and income level, and promoting the improvement of local people’s living standards.

In addition, the project also promotes the development of local related industries. The operation of the plant requires a large number of construction materials, logistics transportation, water and electricity supply and other supporting services, which drives the development of local transportation, logistics, building materials, catering and other related industries, forming a radiation-driven effect on the local economy. Xinhai also purchased a large number of local materials and services during the project implementation, promoting the development of local enterprises and stimulating the vitality of the local economy.

The project also makes an important contribution to the development of Tanzania’s mining industry. Before the implementation of the project, the local mining industry was relatively backward in terms of mineral processing technology and project management. Xinhai introduced advanced all-slime cyanidation technology, efficient mineral processing equipment and scientific project management experience to Tanzania through this project, promoting the technological progress and industrial upgrading of the local mining industry. The successful operation of the project provides a valuable reference for the construction of similar large-scale gold processing plants in Tanzania, helping the local mining industry move towards a more efficient, green and sustainable development path.

In terms of environmental protection, the project also achieves good ecological benefits. Xinhai adopted a series of environmental protection measures in the project design and operation, including dust removal, wastewater treatment and tailings harmless treatment, ensuring that the production process meets Tanzania’s strict environmental protection standards, minimizing the impact on the local ecological environment. This green development mode also sets a good example for the local mining industry, promoting the concept of green mining in Tanzania.

The Tanzania 1,200t/d gold mineral processing plant project is a successful case of win-win cooperation between Xinhai and Tanzania. It not only brings considerable economic benefits to the customer, but also promotes the economic development, industrial upgrading and employment improvement of Tanzania, demonstrating the positive role of Chinese mining enterprises in helping African countries develop mineral resources. In the future, Xinhai will continue to uphold the concept of win-win cooperation, and provide more high-quality mineral processing solutions for global mining customers, making greater contributions to the sustainable development of the global mining industry.

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.