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A kind of method that improves the recovery rate of ferrovanadium nitride

A technology of ferrovanadium nitride and recovery rate, which is applied in the direction of improving process efficiency, using chemical indicators for analysis, and using titration method for chemical analysis, etc. It can solve problems such as waste and environmental pollution, and achieve improved recovery rate and reduced cost , the effect of reducing emissions

Active Publication Date: 2022-03-22
HUNAN ZHONGXIN NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When iron and steel are smelted, an appropriate amount of vanadium can be added to refine the structure and grain of steel, and improve the comprehensive properties of steel such as strength, toughness, corrosion resistance and impact resistance. With the deepening of theoretical research and the verification of actual industrial production, nitriding Ferrovanadium is recognized and favored by more and more researchers and enterprises, and is considered to be the most effective vanadium-containing steelmaking additive, but there is also a large amount of nitriding in the production waste of iron and steel smelting (referred to as "recycled waste") Ferrovanadium and some vanadium elements, if not utilized, will cause waste and also cause pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method for improving the ferrovanadium nitride recovery rate of the present embodiment may further comprise the steps:

[0021] Step 1. Pre-treat the recycled waste to remove useless impurities (such as sand and soil, etc.), and perform a primary calcination on the screened recycled waste to remove flammable substances and oxidize elements such as iron, aluminum, etc., and remove dust from the primary calcined raw materials dry after washing;

[0022] The temperature of primary calcination is 300°C. Its purpose is to remove the non-metallic combustion of raw materials during storage.

[0023] Step 2. Crushing and grinding the dried raw materials in step 1 to obtain powdery grinding raw materials; take a small part of powdery grinding raw materials (for the sample test of measuring content, so only a small part of raw materials need to be randomly selected) and put Put it into the acid solution for reaction, and dissolve the iron oxide, aluminum oxide and vanadium ...

Embodiment 2

[0035] The method for improving the ferrovanadium nitride recovery rate of the present embodiment may further comprise the steps:

[0036] Step 1. Pre-treat the recycled waste to remove useless impurities (such as sand and soil, etc.), and perform a primary calcination on the screened recycled waste to remove flammable substances and oxidize elements such as iron, aluminum, etc., and remove dust from the primary calcined raw materials dry after washing;

[0037] The temperature of primary calcination is 500°C. Its purpose is to remove the non-metallic combustion of raw materials during storage.

[0038] Step 2. Crushing and grinding the dried raw materials in step 1 to obtain powdery grinding raw materials; take a small part of powdery grinding raw materials (for the sample test of measuring content, so only a small part of raw materials need to be randomly selected) and put Put it into the acid solution for reaction, and dissolve the iron oxide, aluminum oxide and vanadium ...

Embodiment 3

[0050] The method for improving the ferrovanadium nitride recovery rate of the present embodiment may further comprise the steps:

[0051] Step 1. Pre-treat the recycled waste to remove useless impurities (such as sand and soil, etc.), and perform a primary calcination on the screened recycled waste to remove flammable substances and oxidize elements such as iron, aluminum, etc., and remove dust from the primary calcined raw materials dry after washing;

[0052] The temperature of primary calcination is 400°C. Its purpose is to remove the non-metallic combustion of raw materials during storage.

[0053] Step 2. Crushing and grinding the dried raw materials in step 1 to obtain powdery grinding raw materials; take a small part of powdery grinding raw materials (for the sample test of measuring content, so only a small part of raw materials need to be randomly selected) and put Put it into the acid solution for reaction, and dissolve the iron oxide, aluminum oxide and vanadium ...

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PUM

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Abstract

A method for improving the recovery rate of ferrovanadium nitride, comprising the following steps: step 1, pretreating the recovered waste materials, and calcining them once; step 2, crushing and grinding; taking part of the powdery grinding raw materials and putting them into acid solution to react; Step 3, filter, take the filtrate, measure the content of iron element, aluminum element and vanadium element in the filtrate; step 4, take the powdery grinding raw material obtained in step 2, add iron powder, aluminum powder and vanadium monomer; step 5, secondary Calcination; Step 6, high temperature reduction, nitriding, to generate ferrovanadium nitride. In the present invention, through the pretreatment and dissolution of recycled waste materials, the internal elements of the sampling solution are measured, the vanadium content in each batch of raw materials is accurately known, and the corresponding alloy elements are re-nitrided to form nitrogen according to its content. Ferrovanadium nitride can increase the recovery rate of ferrovanadium nitride to more than 90%.

Description

technical field [0001] The invention relates to the technical field of recovery of ferrovanadium nitride, in particular to a method for improving the recovery rate of ferrovanadium nitride. Background technique [0002] When iron and steel are smelted, an appropriate amount of vanadium can be added to refine the structure and grain of steel, and improve the comprehensive properties of steel such as strength, toughness, corrosion resistance and impact resistance. With the deepening of theoretical research and the verification of actual industrial production, nitriding Ferrovanadium is recognized and favored by more and more researchers and enterprises, and is considered to be the most effective vanadium-containing steelmaking additive, but there is also a large amount of nitriding in the production waste of iron and steel smelting (referred to as "recycled waste") If vanadium iron and some vanadium elements are not utilized, it will cause waste and also cause pollution to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B7/00C22B5/10C22C35/00C22C30/00G01N31/16G01N31/22
CPCC22B34/22C22B7/001C22B7/007C22B5/10C22C35/00C22C30/00G01N31/16G01N31/22Y02P10/20
Inventor 张春雨
Owner HUNAN ZHONGXIN NEW MATERIALS TECH