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Method for preparing activated zinc oxide by utilizing high-arsenic secondary zinc oxide resource ammonia-ammonium process

A technology of active zinc oxide and secondary zinc oxide, which is applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of lack of technology and weakness

Active Publication Date: 2013-07-17
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the patents and technologies related to the production of active zinc oxide from high-arsenic sub-zinc oxide raw materials are relatively lacking and weak. How to effectively use high-arsenic sub-zinc oxide resources with high impurity content and low grade to maximize its economic efficiency will provide market, The industry provides high-quality, low-cost qualified products to become the goal of research and development by relevant technical personnel

Method used

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  • Method for preparing activated zinc oxide by utilizing high-arsenic secondary zinc oxide resource ammonia-ammonium process

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Embodiment 1

[0061] A method for producing active zinc oxide by using the high-arsenic sub-zinc oxide resource ammonia-ammonium process. The source of the high-arsenic sub-zinc oxide is sub-zinc oxide soot produced by a lead-zinc enterprise. The composition (wt%) is as follows: Zn 47.05 ; Pb 26.07; Cu 0.06; Cd 0.21; Co 0.018; Fe 4.63; As 3.06; Sb 4.54;

[0062]First configure ammonia-containing water: ammonium bicarbonate = 2.5:1 (molar ratio), leaching agent 1L with a total molar concentration of free ammonia of 8 mol, weigh 250 g of powdered zinc suboxide soot sample, and liquid-solid ratio = 4:1. React at a temperature of ℃-70℃ for 0.5 hours and then filter, add the washing solution to make the volume of the leaching solution the same as that of the leaching agent, the leaching rate of zinc is 93.5%, the composition of the leaching solution (g / L): Zn 107.68; Pb 0.53; Cu 0.036; Cd 0.35; As 1.67; Sb 0.6. Then the leaching liquid is purified and removed. According to the amount of As and ...

Embodiment 2

[0064] A method for producing active zinc oxide by utilizing high-arsenic sub-zinc oxide resource ammonia-ammonium process. The source of high-arsenic sub-zinc oxide is sub-zinc oxide soot from iron and steel factories. The composition (%) is as follows: Zn 45.18; Pb 6.07; Cu 0.016; Cd 0.18; Co 0.006; Fe 5.84; As 1.06; Sb 0.54; In 0.0173; F 0.38; Cl 2.25.

[0065] Prepare ammonia-containing water first: ammonium bicarbonate = 5:1 (molar ratio), 1L of leaching agent with a total molar concentration of free ammonia of 10mol, weigh 200g of powdered zinc suboxide soot sample, and liquid-solid ratio = 2:1, at 30 React at a temperature of ℃-50℃ for 2.0 hours, then filter, add washing liquid to make the leachate volume equal to that of the leaching agent, zinc leaching rate is 90.3%, leachate composition (g / L): Zn 89.25; Pb 0.16; Cu 0.01; Cd 0.25; As 0.87; Sb 0.25. Impurity removal: 30% H is used at the beginning of impurity removal 2 o 2 Carry out pre-oxidation, then slowly add f...

Embodiment 3

[0067] A method for producing active zinc oxide by using the high-arsenic sub-zinc oxide resource ammonia-ammonium process, the source of the high-arsenic sub-zinc oxide is sub-zinc oxide soot from iron and steel factories, and the composition (%) is as follows: Zn 46.12; Pb 14.65; Cu 0.04; Cd 0.20; Co 0.01; Fe 4.95; As 2.84;

[0068] First configure ammonia-containing water: ammonium bicarbonate = 1:1 (molar ratio), 1L of leaching agent with a total molar concentration of free ammonia of 10mol, weigh 100g of powdered zinc suboxide soot sample, and liquid-solid ratio = 10:1. React at a temperature of ℃-85℃ for 4.0 hours, then filter, add the washing liquid to make the volume of the leachate the same as that of the leaching agent, the zinc leaching rate is 92.1%, the composition of the leachate (g / L): Zn 49.25; Pb 0.09; Cu 0.02; Cd 0.11; As 0.35; Sb 0.12. Then the leaching liquid is purified and removed. According to the amount of As and Sb, an appropriate amount of hydrogen p...

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Abstract

The invention relates to a method for preparing activated zinc oxide by utilizing a high-arsenic secondary zinc oxide resource ammonia-ammonium process, which belongs to the field of inorganic chemical industry and secondary resource recovery. The method comprises the following technical processes in sequence as follows: leaching, purifying, ammonia distillation, washing, dry crushing, calcining and the like. According to the method for preparing the activated zinc oxide by utilizing the high-arsenic secondary zinc oxide resource ammonia-ammonium process, by taking high-arsenic-antimony secondary zinc oxide generated in a lead and zinc smelting process as a raw material, selective leaching is performed by adding ammonia water and ammonium bicarbonate; then, two-stage purification and deeppurification are performed by ferrous salt, hydrogen peroxide, sulfide and zinc powder; and the ammonia water is recycled and valued metal waste residues are comprehensively recovered. The method forpreparing the activated zinc oxide by utilizing the high-arsenic secondary zinc oxide resource ammonia-ammonium process has strong adaptability on zinc-contained materials and is capable of treating various complicated zinc-contained resources. The method for preparing the activated zinc oxide by utilizing the high-arsenic secondary zinc oxide resource ammonia-ammonium process has the advantages of short flow, production process closed cycle, convenience in operation, low energy consumption, excellent product quality, high economic benefits, low pollution, high comprehensive recovery capacityand the like, and is suitable for industrial production and popularization.

Description

technical field [0001] The invention relates to a method for preparing active zinc oxide by utilizing the high-arsenic sub-zinc oxide resource ammonia-ammonium process, which belongs to the field of inorganic chemical industry and secondary resource recovery. Background technique [0002] Active zinc oxide is an important inorganic chemical product with a wide range of uses, mainly used in rubber, paint, ceramics, glass, medicine, chemical industry, food, etc. [0003] At present, the production methods of active zinc oxide at home and abroad mainly include dry method and wet method. Due to factors such as high energy consumption, unstable product quality, special raw material requirements, and high cost, the dry method has limited prospects in industrial development; while the wet method has a wide range of raw materials, relatively low energy consumption, and good product purity. Stable quality, low cost, less environmental pollution and convenient operation have graduall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02
Inventor 杨跃新李栋柴承平
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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