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Method for improving metallurgical property of vanadium-titanium blast furnace slag

A blast furnace slag and performance technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as blast furnace iron loss and hearth adhesion

Inactive Publication Date: 2011-05-18
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In case of unexpected circumstances, the blast furnace for smelting vanadium-titanium magnetite is prone to hearth bonding or high iron loss in the blast furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Composition of each batch of charge: 26.6 tons of vanadium-titanium sinter + 9.5 tons of vanadium-titanium pellets + 1.9 tons of ordinary lump ore + 0.105 tons of fluorspar + 8.74 tons of coke. Join 2000m from furnace top 3 For blast furnace smelting, the furnace temperature is adjusted by the amount of coal injection, the furnace temperature [Ti] is 0.15% to 0.31%, and the slag contains CaF 2 0.5%, average furnace temperature [Ti] 0.200%, blast furnace utilization factor 2.152t / (m 3 ·d), the iron loss is 6.12%.

Embodiment 2

[0020] Composition of each batch of charge: 26.6 tons of vanadium-titanium sinter + 9.5 tons of vanadium-titanium pellets + 1.9 tons of ordinary lump ore + 0.520 tons of fluorspar + 8.74 tons of coke. Join 2000m from furnace top 3 Blast furnace smelting, the furnace temperature is adjusted by the amount of coal injection, the furnace temperature [Ti] is 0.13% to 0.33%, and the slag contains CaF 2 is 2.5%, the average furnace temperature [Ti] is 0.186%, and the blast furnace utilization factor is 2.232t / (m 3 · d), iron loss 5.1%.

Embodiment 3

[0022] Composition of each batch of charge: 26.6 tons of vanadium-titanium sinter + 9.5 tons of vanadium-titanium pellets + 1.9 tons of ordinary lump ore + 1.03 tons of fluorspar + 8.74 tons of coke. Join 2000m from furnace top 3 For blast furnace smelting, the furnace temperature is adjusted by the amount of coal injection, the furnace temperature [Ti] is 0.13% to 0.35%, and the slag contains CaF 2 is 5.0%, the average furnace temperature [Ti] is 0.181%, and the blast furnace utilization factor is 2.235t / (m 3 · d), iron loss 4.5%.

[0023] From the comparison of Examples 1 to 3 and Comparative Example 1, it can be seen that adding fluorite to the charge makes the CaF in the blast furnace slag 2 The content of the weight percentage is controlled in the range of 0.5% to 5%, which can reduce the average furnace temperature, improve the utilization factor of the blast furnace and reduce the iron loss. Specifically, for the smelting of vanadium-titanium blast furnace slag, ther...

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Abstract

The invention provides a method for improving metallurgical property of vanadium-titanium blast furnace slag, which comprises the following steps of: adding furnace materials containing vanadium, titanium, ferrum and ore in a blast furnace; regulating furnace temperature; and smelting, and then separating slag and ferrum, and adding fluorescence stones into the furnace material so that the weight percentage of CaF2 in the blast furnace slag is controlled within 0.5-5 percent. According to the method provided by the invention, the performance of a vanadium-titanium-containing iron ore concentrate blast furnace for smelting vanadium-containing cast iron furnace slag is improved, and meanwhile, the smelting furnace temperature fluctuation range of the vanadium-titanium-containing iron ore concentrate blast furnace is widened by using fluorescence stones so that the controlled range of the high furnace temperature is widened.

Description

technical field [0001] The invention relates to a method for improving the performance of blast furnace slag in the field of metallurgy, more specifically, a method for improving the metallurgical performance of vanadium-titanium blast furnace slag by using additives. Background technique [0002] When ordinary iron ore is used for blast furnace smelting, due to the low melting temperature, low viscosity and good fluidity of blast furnace slag, the amount of iron in the lower slag is small, generally 2% to 3%, accounting for only 2% of the total iron loss of the blast furnace About 30%. However, when using vanadium-titanium magnetite for blast furnace smelting, due to the TiO in the slag 2 The high content leads to high melting temperature, high viscosity and poor fluidity of the slag, so the amount of iron in the slag is large, generally 6% to 8% in normal furnace conditions, and generally about 10% in poor furnace conditions, accounting for the total amount of blast furna...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21B5/04
CPCY02P10/20
Inventor 张海军宋剑张远祥何木光李刚曾华锋张志刚
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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