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Additive capable of inhibiting low-temperature reduction degradation of iron ore sinter and iron ore sinter

A sinter and additive technology, applied in the field of iron and steel metallurgy sintering, can solve the problems of blast furnace returning ore sieve, corrosion of metal equipment, easy to block the sieve, etc., to overcome corrosion and environmental pollution, enhance the strength of sinter, and increase the existence ratio Effect

Inactive Publication Date: 2018-09-14
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the Cl element not only severely corrodes metal equipment, but on the other hand, it is also a constituent element of the highly toxic substance dioxin.
The amount of spraying is relatively large, reaching 2% of the weight of sintered ore, and it is easy to block the sieve in the next process, resulting in dirty sieve for blast furnace return

Method used

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  • Additive capable of inhibiting low-temperature reduction degradation of iron ore sinter and iron ore sinter
  • Additive capable of inhibiting low-temperature reduction degradation of iron ore sinter and iron ore sinter
  • Additive capable of inhibiting low-temperature reduction degradation of iron ore sinter and iron ore sinter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare an additive for suppressing the low-temperature reduction pulverization of iron ore sinter, the chemical composition and weight percentage content in the additive are: the mass fraction is 50% barium carbonate accounts for 79.8% of the total mass of the additive, and the mass fraction is 86% manganese carbonate accounts for the total mass of the additive The corresponding BaO content is 31% of the total mass of the additive, the content of MnO is 19.5% of the total mass of the additive, the content of secondary alcohol AEO-9 is 2.02% of the total mass of the additive, and the rest are impurities.

[0031] After weighing the barium carbonate, manganese carbonate and secondary alcohol AEO-9 according to the content of the formula, mix the barium carbonate, manganese carbonate and secondary alcohol AEO-9 evenly, and control the particle size of the materials below 0.11mm to obtain improved iron ore The powdered additives of stone sintered ore are reduced at low temp...

Embodiment 2

[0033] Prepare an additive for suppressing low-temperature reduction pulverization of iron ore sinter, the chemical composition and weight percentage content in the additive are: the mass fraction is 90% barium carbonate accounts for 28.61% of the total mass of the additive, and the mass fraction is 92% barium sulfate accounts for the total mass of the additive 43.16%, the mass fraction is 80% manganese hydroxide accounts for 25% of the total mass of the additive, the corresponding BaO content is 48% of the total mass of the additive, the content of MnO is 16% of the total mass of the additive, and the content of secondary alcohol AEO-9 is 1.32%. The rest are impurities.

[0034] After weighing barium carbonate, barium sulfate, manganese hydroxide and secondary alcohol AEO-9 according to the content of the formula, mix the barium carbonate, barium sulfate, manganese hydroxide and secondary alcohol AEO-9 evenly, and control the particle size of the materials at 0.11mm or less, ...

Embodiment 3

[0036]Preparation of an additive for suppressing the low-temperature reduction pulverization of iron ore sinter, the chemical composition and weight percentage content in the additive are: the mass fraction is 95% barium sulfate accounts for 79.12% of the total mass of the additive, and the mass fraction is 80% manganese carbonate accounts for the total mass of the additive 6.04%, the mass fraction is 90% manganese hydroxide accounts for 12.5% ​​of the total mass of the additive, the corresponding BaO content is 53% of the total mass of the additive, the MnO content is 12% of the total mass of the additive, and the secondary alcohol AEO-9 content is 0.85 %, and the rest are impurities.

[0037] After weighing barium sulfate, manganese carbonate, manganese hydroxide and secondary alcohol AEO-9 according to the formula content, mix the barium sulfate, manganese carbonate, manganese hydroxide and secondary alcohol AEO-9 uniformly, and control the particle size of the materials at ...

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Abstract

The invention discloses an additive capable of inhibiting low-temperature reduction degradation of iron ore sinter and the iron ore sinter. The additive is prepared from a barium compound (BaO), a manganese compound (MnO) and fatty alcohol polyoxyethylene ether by mixing, and specifically, the additive is prepared from 31%-60% by mass of BaO, 10%-20% by mass of MnO, 0.1%-2% by mass of fatty alcohol polyoxyethylene ether and the balance of impurities. After the additive with certain granularity is added to a sintering mixture in a certain ratio, the sinter is obtained by material distribution and sintering on a sintering machine, low-temperature reduction degradation of the sinter can be inhibited effectively, low-temperature reduction degradation index (RDI+3.15) of the sinter is optimized, quality of the sinter is improved, and a blast furnace operates smoothly.

Description

technical field [0001] The invention belongs to the field of sintering of iron and steel metallurgy, and in particular relates to an additive for inhibiting the low-temperature reduction and pulverization of iron ore sintering ore and the iron ore sintering ore. Background technique [0002] In the process of heating up the sintered ore with the furnace, it is inevitable to go through the low-temperature reduction and pulverization severe area (400-600 ° C) through the reduction reaction of the lower gas, resulting in different degrees of fragmentation and pulverization, resulting in a large number of small particle ores, resulting in The air permeability of the material column in the furnace becomes poor, and the pressure difference increases, which affects production efficiency, increases energy consumption, and reduces the economic benefits of iron and steel enterprises. Therefore, it is extremely necessary to improve the reduction pulverization index of sintered ore as h...

Claims

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Application Information

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IPC IPC(8): C22B1/16C22B1/24
CPCC22B1/16C22B1/2406C22B1/2413
Inventor 邢相栋王莎刘文果颜晗刘新陈云飞巨建涛李林波刘漫博
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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