Thiourea Manufacturer | How to leaching gold with thiourea

Leaching gold with thiourea involves several steps and considerations. Thiourea is an organic compound often used as an alternative to cyanide in gold leaching processes due to its lower toxicity. Here's a basic outline of how the process works:

1.Preparation of the ore: The gold ore needs to be prepared before leaching. This usually involves crushing and grinding the ore to a fine powder to increase the surface area for the chemical reaction to occur.

2.Thiourea solution preparation: Prepare a thiourea solution by dissolving thiourea in water. The concentration of thiourea in the solution depends on various factors such as the ore type and desired leaching efficiency. Typically, concentrations range from 0.1% to 5%.

3.Acidification: Adjust the pH of the thiourea solution to an acidic range, usually between pH 1 and pH 2. This is typically achieved by adding a suitable acid, such as sulfuric acid. The acidic environment is necessary for the thiourea to effectively dissolve the gold from the ore.

4.Leaching: Immerse the prepared gold ore in the acidic thiourea solution. The thiourea solution acts as a complexing agent, forming soluble gold-thiourea complexes. This step requires sufficient time for the gold to dissolve into the solution. Agitation or stirring may be employed to enhance mass transfer and accelerate the leaching process.

5.Precipitation of gold: Once the gold has been leached into the solution, it needs to be precipitated out. This is usually achieved by adding a suitable reducing agent, such as sodium metabisulfite or zinc powder, to the solution. The reducing agent reacts with the gold-thiourea complex, causing the gold to precipitate out as metallic gold.

6.Separation and recovery: After precipitation, the solid gold particles can be separated from the solution through filtration or other separation techniques. The recovered gold can then be further processed and refined to obtain pure gold.

7.Recycling and environmental considerations: Thiourea can be recycled and reused in the leaching process, which helps reduce costs and minimize environmental impact. However, proper disposal of any residual chemicals and waste from the process is essential to prevent environmental contamination.

It's important to note that the efficiency of gold leaching with thiourea can vary depending on factors such as ore composition, particle size, temperature, and other process parameters. Therefore, thorough testing and optimization may be required to achieve optimal results for a specific ore type. Additionally, proper safety precautions should be followed when handling thiourea and other chemicals used in the process.

Sinhon Chemical is a professional manufacturer of high quality thiourea with an annual output of 20,000 tons. Advanced technology, stable supply, and excellent quality can protect your supply chain.

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Sinhon Chemical focuses on high-quality thiourea production and manufacturing.  The thiourea we produce has high purity, good quality and stable product performance. The annual production capacity is 20,000 tons, the inventory is sufficient, and the supply is stable. we also deal in other products, such as molecular sieves, silica gel desiccant, aniline, methylene chloride, chloroform, sodium hydroxide, propylene oxide, etc. 

Excellent service, reliable quality, delivering more value. 

Contact us to start our journey of cooperation.

Email: info@sinhon-chem.com