From Crushing to Tailings: A Step-by-Step Look at the Tanzania 1200t/d Gold Plant’s Processing Flow

 A mining plant is only as strong as its weakest link—and at the Tanzania 1,200t/d gold mineral processing plant, every link in the processing flow was designed to work in harmony. From the initial crushing stage to the final tailings treatment, Xinhai Mining’s team engineered a seamless flow that maximized gold recovery while maintaining operational efficiency. Let’s break down each stage of this successful plant.

Stage 1: Crushing – Setting the Foundation for Efficient Processing

The processing journey begins with the crushing stage, where the ore is reduced to a manageable size. At the Tanzania plant, a single open-circuit crushing process was implemented. This system uses primary and secondary crushers to break down the raw ore into particles small enough for the grinding stage. Open-circuit crushing was chosen for its simplicity and reliability, ideal for the site’s operational needs. The result? Consistent particle size distribution, ready for the next step in the flow.

Stage 2: Grinding and Classification – Getting the Ore Ready for Leaching

Once crushed, the ore moves to the grinding and classification stage. Here, a closed-circuit grinding system paired with cyclone classification takes over. The ore is fed into a ball mill, where it’s ground into a fine slurry. The slurry is then sent to cyclones, which separate the fine particles (ready for leaching) from the coarser particles (sent back to the mill for re-grinding). This closed-circuit system ensures every particle reaches the optimal size for efficient cyanidation, eliminating waste from over-grinding or under-grinding.

Stage 3: All-Slime Cyanidation – The Core of Gold Extraction

At the heart of the plant is the all-slime cyanidation stage. The fine ore slurry is mixed with cyanide solution in large leaching tanks, where gold dissolves into the solution. Activated carbon is added to the tanks, adsorbing the dissolved gold onto its surface. This gold-bearing carbon is then separated from the slurry and sent to the desorption electrolysis system, where the gold is stripped from the carbon and collected as a high-purity solution. The solution is then processed to extract pure gold, which is later smelted into gold slime.

Stage 4: Tailings Treatment – Closing the Loop Responsibly

After the gold extraction stage, the remaining slurry (tailings) moves to the final treatment stage. At the Tanzania plant, tailings are sent to a thickener, where excess water is removed. The thickened tailings are then sent to a dewatering system, further reducing moisture content. The resulting cake is safely stacked in the tailings facility, while the water is recycled back into the processing flow. This system ensures the plant operates sustainably, minimizing water usage and meeting environmental standards.

Every stage of this flow was optimized to work together, creating a system that delivered consistent results. The crushing stage prepared the ore for efficient grinding, the grinding and classification stage set the stage for high leaching rates, the cyanidation process maximized gold recovery, and the tailings treatment ensured responsible operations.

To see how each stage came together at the Tanzania plant, explore the full case study:

https://www.fewstern.org/cases/Tanzania-1200t-Gold_11.html

This step-by-step flow is a testament to the importance of integrated design in mining projects. At Xinhai Mining, we don’t just design individual stages—we build cohesive processing flows that work as a single unit, delivering maximum value from every ton of ore.