A kind of technology of silver powder washing
A silver powder and process technology, applied in the field of silver powder washing technology, can solve the problems of increasing treatment costs, consuming large amounts of tap water, and consuming large amounts of diesel oil, etc., and achieves the effects of high recovery rate, water and diesel saving, and effective recovery.
Active Publication Date: 2016-07-06
ZHAOJIN MINING +1
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Problems solved by technology
For the silver powder produced in full hydrometallurgy, the traditional washing process adopted is increasingly unsuitable for the needs of social development. One is to use oil-fired boiler steam to heat high-temperature washing, which requires a large amount of diesel oil; A large amount of tap water is consumed; the third is that the acidic wastewater generated during the washing process is likely to cause environmental pollution or increase treatment costs
Method used
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Embodiment
[0011] Numbers A1-A3 are traditional washing methods
[0012]
[0013] Numbered B1-B3 improved washing method
[0014]
[0015] It can be seen from the above table that the reaction temperature of the optimized process is reduced by 25%, the utilization rate of water is reduced by 80%, the reaction time is reduced by 87.5%, and all diesel consumption is saved.
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A silver powder washing process is to replace the silver powder with iron powder in the reactor, and at the same time, HCL is produced and dissolved in water to form hydrochloric acid, and 1 cubic meter / 300kg of tap water is added, and NaOH is added to the reactor at this time. Adjust the pH value of the solution in the reactor between 7.5-8, and at the same time start stirring to accelerate the reaction. Due to the heat generated by the chemical reaction of replacing silver powder and the neutralization reaction of sodium hydroxide hydrochloride, the temperature of the solution in the reactor at this time can reach above 60°C, and the reaction in the reactor can be filtered after about 0.5 hours to produce silver powder.
Description
Technical field: [0001] The invention relates to a silver powder washing process, in particular to a silver powder washing process produced in a full hydrometallurgical production process. Background technique: [0002] In recent years, with the country's emphasis on energy conservation, emission reduction and environmental pollution, enterprises with high energy consumption, high emissions and high pollution must be gradually eliminated, and outdated production processes must be innovated and transformed. For the silver powder produced in full hydrometallurgy, the traditional washing process adopted is more and more unsuitable for the needs of social development. One is to use oil-fired boiler steam to heat high-temperature washing, which requires a large amount of diesel oil; A large amount of tap water is consumed; the third is that the acid waste water generated in the washing process is likely to cause environmental pollution or increase treatment costs. Through the ne...
Claims
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IPC IPC(8): B22F9/24
Inventor 李学强翁占平徐忠敏国洪柱孙英翔彭剑平
Owner ZHAOJIN MINING