Method for treating zinc hydrometallurgy waste residue by using alkali ammonium sulfur coupling method

A technology of hydrometallurgy and waste slag, which is applied in the direction of improving process efficiency, etc.

Active Publication Date: 2012-10-24
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0015] The present invention proposes the method of alkali-ammonium-sulfur coupling method for treating waste slag of zinc smelting in wet process, especially the process of alkali-ammonium-sulfur coupling method for processing ferrite slag and lead-silver slag The process can solve the problem of separation of Fe and valuable metals and recycling of medium system in the process of wet treatment of these waste residues

Method used

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  • Method for treating zinc hydrometallurgy waste residue by using alkali ammonium sulfur coupling method
  • Method for treating zinc hydrometallurgy waste residue by using alkali ammonium sulfur coupling method
  • Method for treating zinc hydrometallurgy waste residue by using alkali ammonium sulfur coupling method

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Experimental program
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Embodiment 1

[0045]

[0046] (1) Boil the yellow potassium iron residue for 1 hour at a temperature of 650 ° C, so that the alum or iron saccinogenic phase in the residue is converted into zinc sulfate, lead sulfate, and iron oxide.2 The first line shown in the first line.

[0047]

[0048] Note: The "^" in the table indicates that the unit is G / T (solid phase) or PPM (liquid phase) "-" indicates that the detected amount is extremely low, and "*" indicates that it is not detected (mainly SO in the solution. 4 2- The content is unbelievable).

[0049] (2) Press the sodium hydroxide solution with a concentration of 50 g / L with a concentration of 50 g / L. The roast residue obtained in the steps at 100 ° C (1) The solid liquid is separated by the solid fluidThe liquid and alkaline immersion return cycle utilization; the ingredients of the obtained immersion slag are shown in Table 2.The slag rate is 85%, and the immersion rate of arsenic reaches 72%.

[0050] When the alkaline immersion is...

Embodiment 2

[0056] Zn PB FE AG^ CU AS CD SIO 2 So 4 2- Before roasting % 8.46 3.00 24.88 60 0.18 0.1 0.08 13.34 37.29

[0057] Note:^Indicates that the data unit is G / T.

[0058] (1) Boil the lead silver residue for 1.5 hours at 550 ° C, and convert the iron or iron of zinc in the residue into zinc sulfate, lead sulfate, and iron oxide.The first line shown.

[0059]

[0060] Note: The "^" in the table indicates that the unit is G / T (solid phase) or PPM (liquid phase) "-" indicates that the detected amount is extremely low, and "*" indicates that it is not detected (mainly SO in the solution. 4 2- The content is unbelievable).

[0061] (2) Press the sodium hydroxide solution with a concentration of 30 g / L with a concentration of 30 g / L. The roast residue obtained in the step of immersed in 160 ° C is 1.2 hours.The liquid and alkaline immersion return cycle utilization; the ingredients of the obtained immersion slag are shown in Table 4.The slag rate i...

Embodiment 3

[0066] (2) According to the solid fluid ratio 1:10, the concentration of 100 g / L sodium hydroxide solution is immersed in steps at 30 ° C (1) The roasting residue obtained in the roasting residue is 0.5 hours, and the solid fluid is separated from the alkali dip and the alkaline immersion fluid.The alkaline immersion liquid returns cyclic use; when the alkaline immersion is used, when the concentration is less than 100 g / L, the recycling of sodium hydroxide adjustment to 100g / L is added before recycling.

[0067] (3) Step (2) the obtained alkaline dipping residue according to the solid fluid ratio 1:10 in the mixture of 90 ° C (100g / L) and ammonia (ammonia water concentration 1g / L) in a mixed solution(Moore ratio of ammonium ions and chloride ions in the mixed solution is 2: 1), and after filtering, the ammonium chloride is immersed and immersed;

[0068] (4) The total Moore of copper, lead, cadmium, and silver in the ammonium chloride out exfoliating solution is 0.5 times the zin...

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Abstract

The present invention discloses a method for treating zinc hydrometallurgy waste residue by using an alkali ammonium sulfur coupling method, relates to a method for comprehensive utilization of lead silver residue and iron alum residue in zinc hydrometallurgy waste residue by using a alkali ammonium sulfur coupling clean metallurgical method, and belongs to the field of metallurgical hazardous solid reside treatment, wherein the method can further be used to treat other complex waste containing lead and zinc. According to the method, a medium temperature calcination method is performed on zinc hydrometallurgy residue; then an alkali leaching treatment is performed; then the leached alkali residue is leached with ammonium chloride; the resulting alkali leaching liquid is replaced by zinc powder to obtain residues containing zinc, copper, lead, silver and cadmium, and a solution; the solution is subjected to precipitation by using a sulfide to obtain a zinc sulfide product and an ammonium chloride solution; or after the ammonium chloride is leached, the resulting leaching liquid is directly treated by using a precipitating agent, and then is filtered to obtain a lead-zinc sulfide concentrate containing copper and silver and an ammonium chloride solution. With the method of the present invention, valuable metal resources in zinc hydrometallurgy residue can be subjected to effective comprehensive recovery, harmlessness and resource of the final residue are achieved, and good environmental benefits and economic benefits can be achieved.

Description

Technical field [0001] The present invention belongs to the field of metallurgical hazardous solid waste residue treatment. It specially involves a clean metallurgical method with alkaline ammonium -sulfur coupling. The method of using wet -to -zinc waste slag and alum residue can also be used.Complex waste. Background technique [0002] Lead silver residue and iron slag are two solid waste residues produced in the process of wet zinc -refining process. Because not only heavy metal ions such as ZN, CU, but also to toxic and harmful elements such as PB, CD, and AS, and environmental stability, environmental stabilityPoor, some toxic substances are water -soluble, so they are listed as hazardous solid wastes internationally.According to the statistics of the Nonferrous Industry Bureau, the annual output of zinc in my country in 2009 exceeded 4.4 million tons, ranking first in the world.Among them, the zinc produced by the wet process accounts for about 75%of the total, and the abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B3/14C22B3/44C22B11/00C22B13/00C22B15/00C22B17/00C22B19/00
CPCY02P10/20
Inventor 巨少华彭金辉郭胜惠
Owner KUNMING UNIV OF SCI & TECH
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