Preparation method of high-vanadium high-chromium type vanadium titanium magnetite pellets

A vanadium-titanium magnetite, high-vanadium and high-chromium type technology, applied in the field of high-vanadium, high-chromium vanadium-titanium magnetite pellets, can solve the problem of over-melting, agglomeration or nodulation of the pellets, which affects the finished product Problems such as production and quality of balls, to achieve the effect of uniform and dense microstructure, increase production and quality, and tight bonding state

Active Publication Date: 2017-10-24
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing process for preparing imported high-vanadium and high-chromium vanadium-titanium magnetite pellets is prone to over-melting,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A method for preparing high-vanadium and high-chromium vanadium-titanium magnetite pellets, which is realized through the following steps: moistening, batching, drying and mixing, adding bottom water and mixing materials, stewing materials, pelletizing, screening raw pellets, and drying Intervention oxidation, shaft furnace roasting, cooling, the specific steps are:

[0051] Step 1, Rinse

[0052] The high-vanadium and high-chromium vanadium-titanium magnetite is lubricated and ground for 15 minutes, and the high-vanadium and high-chromium vanadium-titanium magnetite powder after the lubricating is obtained, and its fineness is -200 mesh ≥ 90%;

[0053] The lubricating mill adopts a lubricating mill, wherein, the process parameters of the lubricating mill are: the specification of the lubricating mill is MR3254, the outer dimension is 13.4m×7.25m×5.7m, the inner diameter of the cylinder is 3.2m, and the cylinder working The length is 5.4m, the effective capacity of the...

Embodiment 2

[0081] A method for preparing high-vanadium and high-chromium vanadium-titanium magnetite pellets, which is realized through the following steps: moistening, batching, drying and mixing, adding bottom water and mixing materials, stewing materials, pelletizing, screening raw pellets, and drying Intervention oxidation, shaft furnace roasting, cooling, the specific steps are:

[0082] Step 1, Rinse

[0083] The high-vanadium and high-chromium vanadium-titanium magnetite is lubricated and ground for 8 minutes, and the high-vanadium and high-chromium vanadium-titanium magnetite powder after the lubricating is obtained, and its fineness is -200 mesh ≥ 90%;

[0084] The lubricating mill adopts a lubricating mill, wherein the process parameters of the lubricating mill are: the specification of the lubricating mill is MR3870, the external dimensions are 16.4m×8.74m×7.59m, the inner diameter of the cylinder is 3.8m, and the cylinder working Length 7.0m, cylinder effective capacity 73.6...

Embodiment 3

[0111] A method for preparing high-vanadium and high-chromium vanadium-titanium magnetite pellets, which is realized through the following steps: moistening, batching, drying and mixing, adding bottom water and mixing materials, stewing materials, pelletizing, screening raw pellets, and drying Intervention oxidation, shaft furnace roasting, cooling, the specific steps are:

[0112] Step 1, Rinse

[0113] The high-vanadium and high-chromium vanadium-titanium magnetite is lubricated and ground for 10 minutes, and the high-vanadium and high-chromium vanadium-titanium magnetite powder after the lubricating is obtained, and its fineness is -200 mesh ≥ 90%;

[0114] The lubricating mill adopts a lubricating mill, wherein the process parameters of the lubricating mill are: the specification of the lubricating mill is MR2265, the external dimension is 10.97m×5.62m×4.05m, the inner diameter of the cylinder is 2.2m, and the cylinder working The length is 6.5m, the effective capacity of...

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Abstract

The invention provides a preparation method of high-vanadium high-chromium type vanadium titanium magnetite pellets and belongs to the technical field of blast-furnace smelting in a comprehensive utilization method of high-vanadium high-chromium type vanadium titanium magnetite. The preparation method comprises the steps that wet-grinding is performed on the imported high-vanadium high-chromium type vanadium titanium magnetite, compounding is performed according to a pellet raw material ratio, raw materials are dried and mixed, bottom water is added for material mixing, the materials are braised, pelletizing is performed, fresh pellets are screened, the pellets with the size being 8-16 mm are obtained, then drying and pre-oxidation, shaft furnace roasting and cooling are performed, and the high-vanadium high-chromium type vanadium titanium magnetite pellets are obtained. By means of the method, the problems that the pellet magnetite is prone to superfusion, therefore agglomeration or nodulation is caused, and the yield and quality of the finished pellets are influenced are solved, the quality of the fresh pellets is truly and effectively improved, and the yield and quality of the pellet magnetite are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting in the comprehensive utilization method of high-vanadium and high-chromium vanadium-titanium magnetite, and in particular relates to a pellet of high-vanadium and high-chromium vanadium-titanium magnetite. Background technique [0002] With the growing gap between the supply and demand of domestic iron ore, iron and steel enterprises urgently need to expand the source of iron ore resources and develop high value-added vanadium-chromium products. Importing foreign iron ore resources has become a trend. Importing high-vanadium and high-chromium vanadium-titanium magnets Iron ore is a polymetallic co-associated ore rich in iron, vanadium, titanium, chromium and other valuable components. It has high application value, but its mineral composition is complex and comprehensive utilization is difficult. In the prior art, vertical It is not appropriate to determine the thermal operation sys...

Claims

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Application Information

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IPC IPC(8): C22B1/243C22B1/02
CPCC22B1/02C22B1/2406C22B1/243
Inventor 薛向新张勇程功金张志祥姜涛张显峰杨合姚本金杨松陶周晟程
Owner NORTHEASTERN UNIV
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