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High-chromium and high-titanium vanadium-titanium magnetite blast furnace iron-smelting furnace burden and blast furnace smelting method thereof

A vanadium-titanium magnetite and blast furnace ironmaking technology, applied in the field of ironmaking, can solve problems such as insufficient research, low utilization efficiency of iron, vanadium, and titanium, and environmental pollution

Inactive Publication Date: 2017-09-12
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The production process for the comprehensive utilization of ordinary vanadium-titanium iron ore has been basically formed, but according to this process, the utilization efficiency of iron, vanadium and titanium is low, especially the utilization rate of titanium resources is low, and the utilization rate of Panxi titanium resources is 25%. , the utilization rate of titanium resources in Chengde area is less than 10%.
Although my country's high-chromium and high-titanium vanadium-titanium magnetite resources have begun to be mined and utilized on a small scale, because the system integration technology has not yet been formed, the vanadium-chromium resources, especially the chromium resources, have not been utilized, which not only directly leads to high-chromium The comprehensive utilization value of high-titanium vanadium-titanium magnetite cannot be effectively utilized, which wastes resources and pollutes the environment
[0005] In view of the particularity of high-chromium and high-titanium vanadium-titanium magnetite resources, there is no technology to apply it to blast furnace production at home and abroad, and the relevant research is very insufficient.

Method used

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  • High-chromium and high-titanium vanadium-titanium magnetite blast furnace iron-smelting furnace burden and blast furnace smelting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Mix high-chromium and high-titanium vanadium-titanium concentrate powder with ordinary iron ore powder and auxiliary materials to make sintered ore. The mass ratio of high-chromium and high-titanium vanadium-titanium concentrate in the sintered ore is controlled at 40% to 50% %, ordinary iron ore powder 20-40%, coke powder 4-5%, flux: 10-15%, and the alkalinity of sintered ore is controlled between 2.2 and 2.5;

[0042] Step 2: Making high-chromium and high-titanium vanadium-titanium concentrate powder into pellets, the raw materials contain the following components in weight ratio: 97-99% of high-chromium and high-titanium vanadium ferromagnetite concentrate, 1-3% of bentonite ;

[0043] Step 3: 67% sintered ore, 28% pelletized ore and 5% common lump ore are mixed into the blast furnace according to mass percentage;

[0044] Step 4: Smelting in blast furnace, specific parameters: air temperature 1220°C, oxygen enrichment rate up to 2%, injection coal volume 13...

Embodiment 2

[0051] Step 1: Mix high-chromium and high-titanium vanadium-titanium concentrate powder with ordinary iron ore powder and auxiliary materials to make sintered ore. The mass ratio of high-chromium and high-titanium vanadium-titanium concentrate in the sintered ore is controlled at 40% to 50% %, ordinary iron ore powder 20-40%, coke powder 4-5%, flux: 10-15%, and the alkalinity of sintered ore is controlled between 2.2 and 2.5;

[0052] Step 2: Making high-chromium and high-titanium vanadium-titanium concentrate powder into pellets, the raw materials contain the following components in weight ratio: 97-99% of high-chromium and high-titanium vanadium ferromagnetite concentrate, 1-3% of bentonite ;

[0053] Step 3: 69% sintered ore, 27% pelletized ore and 4% common lump ore are mixed into the blast furnace according to mass percentage;

[0054] Step 4: Smelting in blast furnace, specific parameters: air temperature 1225°C, oxygen enrichment rate up to 3%, injection coal volume 13...

Embodiment 3

[0058] Step 1: Mix high-chromium and high-titanium vanadium-titanium concentrate powder with ordinary iron ore powder and auxiliary materials to make sintered ore. The mass ratio of high-chromium and high-titanium vanadium-titanium concentrate in the sintered ore is controlled at 40% to 50% %, ordinary iron ore powder 20-40%, coke powder 4-5%, flux: 10-15%, and the alkalinity of sintered ore is controlled between 2.2 and 2.5;

[0059] Step 2: Making high-chromium and high-titanium vanadium-titanium concentrate powder into pellets, the raw materials contain the following components in weight ratio: 97-99% of high-chromium and high-titanium vanadium ferromagnetite concentrate, 1-3% of bentonite ;

[0060] Step 3: 71% sintered ore, 26% pelletized ore and 3% common lump ore are mixed into the blast furnace according to mass percentage;

[0061] Step 4: Smelting in blast furnace, specific parameters: air temperature 1230°C, oxygen enrichment rate up to 4%, injection coal volume 13...

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Abstract

The invention provides a vanadium-titanium magnetite blast furnace iron-smelting furnace burden and a smelting method thereof. The furnace burden comprises the following components in parts by weight: 65-75 parts of high-chromium and high-titanium vanadium-titanium sinters, 25-30 parts of high-chromium vanadium-titanium pellets and 2-5 parts of common lump ores with particles of 10-50mm, wherein the high-chromium vanadium-titanium sinters are prepared through sintering high-chromium and high-titanium vanadium-titanium magnetite concentrates, common iron ores, a fuel and a flux with a mass ratio of (40 to 50): (20 to 40): (4 to 5): (10 to 15); the mass content of Cr2O3 in the high-chromium and high-titanium vanadium-titanium magnetite concentrates is 1.0-1.9%, and the mass content of TiO2 is 12-13%; the high-chromium vanadium-titanium pellets are prepared from high-chromium and high-titanium vanadium-ferrum magnetite concentrates and bentonite with a mass ratio of (97 to 99): (1 to 3); and the mass content of TFe in the common lump ores is 40-50%, and the mass content of SiO2 is 15-25%. The furnace burden is capable of realizing blast furnace intensified smelting, and high in blast furnace utilization coefficient.

Description

technical field [0001] The invention relates to the technical field of ironmaking, in particular to a high-chromium and high-titanium vanadium-titanium magnetite blast furnace ironmaking charge and a blast furnace smelting method thereof. Background technique [0002] my country is a large developing country. With the rapid development of the socialist market economy, the quality and requirements for iron ore are becoming more and more stringent. For actual production, cost saving has always been one of the important goals of the enterprise, and because the price of ordinary ore is much higher than that of vanadium-titanium magnetite, therefore, more utilization of vanadium-titanium magnetite in actual production has an important effect on saving costs. Significance. In addition to iron, vanadium and titanium, high chromium and high titanium vanadium-titanium magnetite is also accompanied by precious chromium resources, conjugated to the two major industries of iron and ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/008C21B5/003
Inventor 付卫国文永才蒋胜
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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