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Method for preparing high-purity sodium arsenate from copper smelting smoke dust through alkaline leaching

A pure sodium arsenate and copper smelting technology, applied in the direction of improving process efficiency, etc., can solve the problems of arsenic product development and utilization trend restrictions, low comprehensive recovery rate of valuable elements, arsenic product market restrictions, etc., to achieve full utilization and sustainable development, improving the economic and environmental benefits of the enterprise, and reducing the consumption of chemicals

Inactive Publication Date: 2020-07-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many academic papers and related patent reports on the removal of arsenic from soot, but due to different raw materials, the comprehensive recovery rate of valuable elements is low; because most of arsenic and its compounds are highly toxic, they are easy to cause harm to the human body and the environment. Hazards, the development and utilization of arsenic products are generally restricted, and the market for arsenic products is restricted, but high-purity, relatively low-toxicity arsenic products have certain application prospects, such as inorganic and organic compounds with special properties and the alloy industry Among them, it is widely used in glass industry, wood preservatives, pesticide preparation, alloys, photoelectric materials, and pharmaceutical synthesis

Method used

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  • Method for preparing high-purity sodium arsenate from copper smelting smoke dust through alkaline leaching
  • Method for preparing high-purity sodium arsenate from copper smelting smoke dust through alkaline leaching
  • Method for preparing high-purity sodium arsenate from copper smelting smoke dust through alkaline leaching

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Effect test

Embodiment 1

[0024] A method for preparing high-purity sodium arsenate by alkaline leaching of copper smelting dust, using the flash furnace dust of a copper smelter as raw material, separating the solid and liquid after neutral leaching, to obtain the middle leaching solution and middle leaching residue; the middle leaching residue Solid-liquid separation after wet magnetic separation to obtain magnetic separation slag; further solid-liquid separation after wet alkali leaching of magnetic separation slag to obtain alkali leaching liquid; high-purity sodium arsenate crystals are obtained after freezing the alkali leaching liquid. Specific steps are as follows:

[0025] The raw material is flash furnace dust of copper smelter, and the main metal element contents are: Cu (19%), Fe (15%), S (8%), As (5%), Zn (3.5%), Pb (2.5%) %), the main phases are hydrated copper sulfate, magnetite, and arsenic trioxide.

[0026] The specific steps of neutral leaching of smoke and dust: liquid-solid ratio ...

Embodiment 2

[0035] A method for preparing high-purity sodium arsenate by alkali leaching of copper smelting fumes, using copper smelting factory flash furnace fumes as raw materials, and separating solid and liquid after neutral leaching to obtain middle leaching liquid and middle leaching slag; wet middle leaching slag Solid-liquid separation after magnetic separation to obtain magnetic separation slag; further solid-liquid separation after wet alkali leaching of magnetic separation slag to obtain alkali leaching solution; high-purity sodium arsenate crystals are obtained after freezing the alkali leaching solution. Specific steps are as follows:

[0036] The raw material is flash furnace dust of copper smelter, and the main metal element contents are: Cu (19%), Fe (15%), S (8%), As (5%), Zn (3.5%), Pb (2.5%) %), the main phases are hydrated copper sulfate, magnetite, and arsenic trioxide.

[0037] The specific steps of neutral leaching of smoke and dust: liquid-solid ratio 6:1, tempera...

Embodiment 3

[0043] A method for preparing high-purity sodium arsenate by alkali leaching of copper smelting fumes, using copper smelting factory flash furnace fumes as raw materials, and separating solid and liquid after neutral leaching to obtain middle leaching liquid and middle leaching slag; wet middle leaching slag Solid-liquid separation after magnetic separation to obtain magnetic separation slag; further solid-liquid separation after wet alkali leaching of magnetic separation slag to obtain alkali leaching solution; high-purity sodium arsenate crystals are obtained after freezing the alkali leaching solution. Specific steps are as follows:

[0044] The raw material is flash furnace dust of copper smelter, and the main metal element contents are: Cu (19%), Fe (15%), S (8%), As (5%), Zn (3.5%), Pb (2.5%) %), the main phases are hydrated copper sulfate, magnetite, and arsenic trioxide.

[0045] The specific steps of neutral leaching of smoke and dust: liquid-solid ratio 7:1, tempera...

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Abstract

The invention discloses a method for preparing high-purity sodium arsenate from copper smelting smoke dust through alkaline leaching. Copper smelting plant flash furnace smoke dust serves as a main raw material, after neutral leaching, solid-liquid separation is carried out, neutral leaching liquid and neutral leaching slag are obtained, the neutral leaching slag is subjected to wet process magnetic separation, then, solid-liquid separation is carried out, and magnetic separation slag is obtained; the magnetic separation slag is subjected to wet process alkaline leaching further, solid-liquidseparation is carried out, and alkaline leaching liquid is obtained; and the alkaline leaching is frozen, and high-purity sodium arsenate crystals can be obtained. The method is suitable for opening and arsenic extracting of the copper smelting smoke dust, enrichment and recycling of valuable elements in the smoke dust can be achieved, the process flow is clear and efficient, the resource use rateis high, and the method is economic, practical, safe, environment-friendly and good in industry prospect and social benefits.

Description

technical field [0001] The invention belongs to the field of high-purity sodium arsenate crystal preparation, and in particular relates to a method for preparing high-purity sodium arsenate by alkaline leaching of copper smelting dust. Background technique [0002] Circular economy is an inevitable trend of my country's economic development. In the copper smelting industry, there are common problems such as large consumption of resources, high energy consumption required for production, and low utilization rate of secondary resources. In recent years, the application field of metal copper has been expanding continuously. Copper fume is one of the main wastes in the copper smelting industry, which contains copper, zinc, lead, bismuth and other valuable metals. Reasonable recovery of these valuable metals will promote The development of circular economy is of great significance; at the same time, in the copper smelting industry, it will inevitably lead to the enrichment of h...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B30/04
CPCC22B7/006C22B7/02C22B30/04Y02P10/20
Inventor 钟祥华衷水平刘文元陈素余吴晓林
Owner FUZHOU UNIV
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