Zinc hydrometallurgy process favorable for floatation silver and adopted precipitating silver mixture

A hydrometallurgical zinc smelting and process technology, applied in the field of non-ferrous metal smelting, can solve the problems of reduced silver enrichment and recovery rate, difficult to recover economically, and loss of silver dispersion, so as to improve electrolysis efficiency, reduce silver loss and save The effect of electricity

Inactive Publication Date: 2014-12-24
马永涛
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Because the silver content in the jarosite slag and the net liquid slag is low, especially the silver in the jarosite slag forms a complex structure of silver-jadosite double salt, which is difficult to recover economically, resulting in high acid leaching-low pollution sinking The dispersion loss of silver during the hydrometallurgy zinc leaching process reduces the enrichment recovery rate of silver in high leaching slag

Method used

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  • Zinc hydrometallurgy process favorable for floatation silver and adopted precipitating silver mixture
  • Zinc hydrometallurgy process favorable for floatation silver and adopted precipitating silver mixture
  • Zinc hydrometallurgy process favorable for floatation silver and adopted precipitating silver mixture

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Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, it belongs to the conventional leaching process method in hydrometallurgy: a kind of hydrometallurgy technique that is beneficial to flotation silver, and it comprises following several steps: it comprises following several steps: (1) neutral leaching : adding zinc calcined sand and manganese dioxide to the waste electrolyte and low-acid leaching overflow liquid for neutral leaching to produce neutral leaching overflow liquid and neutral leaching underflow liquid; (2) net liquid: neutral leaching Add zinc powder to the overflow liquid to clean the liquid, produce purified liquid and clean liquid slag, purify the liquid to extract zinc and produce waste electrolyte; (3) low-acid leaching: add waste electrolyte and waste electrolyte to the neutral leaching bottom flow Dilute sulfuric acid is used for low-acid leaching to produce low-acid leaching overflow and acid leaching residue. Add zinc sulfide and activated carbon powder in the ne...

Embodiment 2

[0030] Embodiment 2: Other schemes are the same as Example 1, and the difference is that zinc sulfide and activated carbon powder are added in the neutral leaching and low-acid leaching steps, and the addition of zinc sulfide and activated carbon powder is based on the total amount of zinc calcined sand in the whole process As a basis, add 0.2 kg of zinc sulfide and 0.6 kg of activated carbon powder per 1 ton of zinc calcine in the neutral leaching step; add 0.2 kg of zinc sulfide and 0.6 kg of activated carbon powder per 1 ton of zinc calcine in the low-acid leaching step. The powder fineness is 200 mesh.

Embodiment 3

[0031] Embodiment 3: Other schemes are the same as Example 1, and the difference is that zinc sulfide and activated carbon powder are added in the neutral leaching and low-acid leaching steps, and the addition of zinc sulfide and activated carbon powder is based on the total amount of zinc calcine in the whole process As a basis, add 0.25 kg of zinc sulfide and 0.7 kg of activated carbon powder per 1 ton of zinc calcine in the neutral leaching step; add 0.25 kg of zinc sulfide and 0.7 kg of activated carbon powder per 1 ton of zinc calcine in the low-acid leaching step The powder fineness is 400 mesh.

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Abstract

The invention discloses a zinc hydrometallurgy process favorable for floatation silver. The process comprises five steps: zinc concentrate roasting, leaching, liquid purifying, electrodepositing and obtaining an electric zinc product. Zinc sulfate and active carbon powder are added in the leaching step depending on the total amount of zinc calcine in the entire process, wherein 0.3-0.6kg of zinc sulfate and 0.6-1.5kg of active carbon powder are added in each ton of the zinc calcine. The zinc sulfate and the active carbon powder added in the leaching step can reduce silver contents in various leaching solutions, and reduce silver entering into the liquid purifying and alum precipitating steps, so that the silver is precipitated in the leaching step and enters into acid leaching residue or high leaching residue, thus avoiding dispersing loss of the silver. The zinc sulfate can reduce formation of argentojarosite, so as to reduce silver loss and improve silver recovery rate. And the active carbon powder can not only absorb the silver but also absorb organic matters to reduce the organic matters entering into a zinc electrolyte solution, which is favorable for improving electrolysis efficiency and saving electric energy.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting, and in particular relates to a hydro-method zinc smelting process beneficial to flotation of silver and the used heavy silver mixture. Background technique [0002] Zinc hydrometallurgy is the most important zinc smelting method in the world today, and its output accounts for more than 85% of the world's total zinc production. Recently, the world's newly built and expanded production capacity adopts the hydrometallurgy process. The standard process of the hydrometallurgy process is zinc concentrate roasting→leaching→clean liquid→electrowinning→electrolytic zinc products. Among them, due to the different conditions and links of leaching operations, it is divided into two types: conventional leaching process and high acid leaching process. The leaching link of the conventional leaching process includes neutral leaching and low-acid leaching steps; the process produces acid leac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/00C22B3/04C22B11/00C25C1/16
CPCY02P10/20
Inventor 马永涛
Owner 马永涛
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