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Combined sodium salt roasting method for vanadium-containing and chromium-containing raw materials

A technology for sodium roasting and raw materials, applied in the field of metallurgy and chemical industry, can solve the problems of high energy consumption, unsuitable for industrialized production, long process flow, etc., and achieve the effects of improving recovery rate, efficient extraction, and realizing joint production and extraction.

Pending Publication Date: 2022-07-05
SICHUAN YINHE CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method also realizes the extraction of vanadium and chromium resources, its process flow is long, energy consumption is high, and it is not suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for combined sodium roasting of vanadium-containing and chromium-containing raw materials of the present embodiment comprises the following steps:

[0032] Select vanadium slag (vanadium content 7.5%, chromium content 5.5%) and chromium-containing tailings (vanadium content 0.1%, chromium content 20.20%) produced in the iron and steel industry as the main raw materials, vanadium slag and chromium-containing tailings are mixed in a certain proportion, Then add the theoretical amount of 1.2 parts of sodium carbonate and 0.45 parts of sodium chloride for mixing. The mixed raw meal is put into the calciner for roasting, and the roasted clinker is kept at 875 ° C for 3-5 hours. The roasted clinker is passed through the sample making machine. Pulverize, keep most of the clinker fineness within the range of 80 mesh to 200 mesh, and add water of the same quality according to the quality of the clinker to carry out the leaching operation. Take away the residual vanadium...

Embodiment 2

[0034] A method for combined sodium roasting of vanadium-containing and chromium-containing raw materials of the present embodiment comprises the following steps:

[0035] Select vanadium extraction tailings (vanadium content 1.5%, chromium content 5.2%) and high chromium tailings (vanadium content 0.15%, chromium content 32.20%) produced in the vanadium extraction industry as the main raw materials, vanadium extraction tailings and high chromium tailings Mix according to a certain proportion, then add the theoretical amount of 0.8 parts of sodium carbonate and 0.75 parts of sodium sulfate for mixing, and put the mixed raw meal into the calciner for roasting, and keep roasting at 845 ° C for 4.5 hours. The sample making machine is crushed to keep most of the clinker fineness within the range of 80 mesh to 200 mesh. According to the quality of the clinker, water of the same quality is added to carry out the leaching operation. The residual vanadium and chromium compounds in the...

Embodiment 3

[0037] A method for combined sodium roasting of vanadium-containing and chromium-containing raw materials of the present embodiment comprises the following steps:

[0038]Select vanadium-containing steel slag (vanadium content 2.2%, chromium content 7.6%) and high-chromium tailings (vanadium content 0.15%, chromium content 32.20%) produced in the iron and steel industry as the main raw materials. Proportionally mixed, then add the theoretical amount of 75 parts of sodium carbonate, 0.45 parts of sodium sulfate, 0.6 parts of sodium chloride for mixing, the mixed raw meal is put into the calciner for roasting, and the roasting is kept at 795 ° C for 5 hours. The clinker is pulverized by the sample making machine to keep most of the clinker fineness within the range of 80 mesh to 200 mesh. According to the quality of the clinker, the same quality of water is added to carry out the leaching operation. The filtrate filtered for the first time is a high-concentration leachate. , was...

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PUM

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Abstract

The invention discloses a vanadium-containing and chromium-containing raw material combined sodium salt roasting method which comprises the following steps: mixing two or more vanadium-containing and chromium-containing raw materials, and then adding a sodium salt auxiliary agent for mixing; putting the mixed raw material into a kiln for roasting to obtain roasted clinker; the obtained clinker is smashed and put into water to be soaked after being smashed, or the clinker is directly put into water without being smashed and stirred when the clinker is still hot, a water-soluble vanadium-chromium compound in the clinker is fully dissolved into water and filtered, filtrate obtained through first-time filtering is high-concentration leaching liquid and is used for producing vanadium-chromium products, filter cakes are washed with clear water again, and the vanadium-chromium product is obtained. Residual soluble vanadium and chromium compounds in the filter cake are taken away until the filter cake is cleaned up. The method is simple in process, low in roasting temperature, capable of recycling water and free of hazardous waste, the vanadium resource extraction rate can reach 95% or above, the chromium extraction rate can reach 85% or above when a high-chromium raw material is used, the chromium extraction recovery rate can reach 75% or above when a low-chromium raw material is used, and the method is suitable for efficient recovery of resources of different vanadium-containing and chromium-containing materials.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and more particularly, the invention relates to a method for combined sodium roasting of vanadium-containing and chromium-containing raw materials. Background technique [0002] Vanadium and chromium elements are common in the field of non-ferrous metal metallurgy. Because vanadium and chromium have high industrial value in modern industry, it is more and more important to recycle vanadium and chromium in waste residues. Vanadium is a just-needed product, and the existing production The process is mainly for vanadium extraction, such as Panzhihua, Xichang, Chengde and other areas. The roasting cycle of vanadium extraction alone in these areas is between 7-9 hours, and the roasting cycle is very long. The single vanadium extraction process makes chromium resources enter the tailings. emission, resulting in waste of chromium resources, and its vanadium extraction roasting t...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/04C22B34/22C22B34/32C22B3/28C22B7/00
CPCC22B1/02C22B3/04C22B34/22C22B34/32C22B3/22C22B3/44C22B7/006Y02P10/20
Inventor 王斌肖棱白礼太王方兵杨辉代廷凡顾建强
Owner SICHUAN YINHE CHEM
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