Slag diluent for molten iron desulphurization slag

A technology of molten iron desulfurization slag and thin slag agent, which is applied in the field of thin slag agent to achieve the effects of improving desulfurization efficiency, enhancing the effect of thin slag, and expanding adaptability

Inactive Publication Date: 2009-01-07
WUHAN IRON & STEEL (GROUP) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to effective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1:

[0014] Hot metal desulfurization slag thinner: It is composed of the following raw materials in weight percentage: fluorite powder 45%, particle size ≤0.178mm, spodumene powder 28%, particle size ≤0.150mm, industrial soda ash 20%, borax 5%, iron oxide scale powder 2%, particle size ≤0.178mm. Add the above-mentioned raw materials into the mixer and stir evenly to obtain the required molten iron desulfurization slag thin slag agent, which is bagged and packaged at 5 kg per bag. The prepared molten iron desulfurization slag thin slag agent was used to test the fluxing effect in the laboratory. 40 grams of molten iron desulfurization slag thin slag agent was added to the square porcelain boat, and the molten iron desulfurization slag thin slag was put into the experimental electric furnace to heat up to 1000 ℃, and then take it out after 10 minutes. Pour, the molten iron desulfurization slag thin slag agent flows out smoothly; first add 100 grams of desulfurization...

Example Embodiment

[0015] Example 2:

[0016] Hot metal desulfurization slag thinner: It is composed of the following raw materials in weight percentage: fluorite powder 55%, particle size ≤0.178mm, spodumene powder 22%, particle size ≤0.150mm, industrial soda ash 15%, borax 4%, iron oxide scale powder 4%, particle size ≤0.178mm. Add the above-mentioned raw materials into the mixer and stir evenly to obtain the required molten iron desulfurization slag thin slag agent, which is bagged and packaged at 5 kg per bag. The prepared molten iron desulfurization slag thin slag agent was used in a steel plant's 320-ton torpedo tank magnesium-based mixed injection and calcium-based mixed injection desulfurization production conditions to conduct industrial tests, according to 0.8-1 kg per ton of iron Before desulfurization, a thin slag agent for molten iron desulfurization slag was added. Industrial test results showed that the average slag dumping volume of a single tank was increased by 70% and 72%, respect...

Example Embodiment

[0017] Example 3:

[0018] Hot metal desulphurization slag thinner: It is composed of the following raw materials in weight percentage: 51% fluorite powder, particle size ≤0.178mm, spodumene powder 25%, particle size ≤0.150mm, industrial soda ash 19%, borax 3%, iron oxide scale powder 2%, particle size ≤0.178mm. Add the above-mentioned raw materials into the mixer and stir evenly to obtain the required molten iron desulfurization slag thin slag agent, which is bagged and packaged at 5 kg per bag. In the process of desulfurization and slag removal of 50 tons of molten iron from a steel mill, the blast furnace slag contained titanium, brought in a large amount, high alkalinity, and high melting point, which caused the desulfurization slag on the surface of the molten iron to be scattered and difficult to slag, so it was specially prepared. The industrial test was carried out for the molten iron desulfurization slag thin slag agent. According to 0.5 kg of iron per ton, the molten iro...

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Abstract

The invention discloses a residue diluting agent for the desulfuration residue of molten iron for improving the floating performance of the desulfuration residue of molten iron which consists of the materials with the following weight percentages: 45 to 55 percent of fluorite powder, 22 to 28 percent of spodumene mine powder, 15 to 20 percent of industrial sodium carbonate, 3 to 5 percent of borax and 2 to 4 percent of oxide scale powder; wherein, the content of CaF2 in the fluorite powder is equal to or more than 85 percent and the granularity is equal to or less than 0.178mm; the spodumene mine powder is manufactured by carrying out fine grinding on natural mines and the granularity is equal to or less than 0.150mm; the contents of the weight percentages of the main chemical components of the spodumene mine powder are as follows: 0.8 to 1.5 percent of Li2O, 71 to 76 percent of SiO2 and 18 to 20 percent of Al2O3; the oxide scale powder is manufactured by carrying out ball milling on a rolling oxide scale and the granularity is equal to or less than0.178mm. In the industrial sodium carbonate, the content of Na2CO3 is equal to or more than 98 percent. The content of Na2B4O7.10H2O in the borax is equal to or more than 95 percent. The residue diluting agent of the invention takes the fluorite powder, the spodumene mine powder and the industrial sodium carbonate as the main materials, can effectively improve the floating performance of the desulfuration residue of molten iron, is applicable for the fluxing of the desulfuration residue with large residue amount, high basicity, large viscosity and high melting point; besides, the costs of the materials are low.

Description

technical field [0001] The invention relates to a thinner slag agent for improving the fluidity of molten iron desulfurization slag, which is suitable for helping the desulfurization slag with large amount of slag, high alkalinity, high viscosity and high melting point, and belongs to the field of auxiliary materials for pretreatment of molten iron desulfurization. Background technique [0002] The desulfurization slag for hot metal desulfurization pretreatment is mainly composed of blast furnace slag and desulfurization residue after desulfurization agent. Due to the large consumption of alkaline desulfurizer and the introduction of blast furnace slag, the amount of desulfurization slag is large, the alkalinity is high, and the viscosity is high. Large, high melting point, resulting in difficult desulphurization pretreatment slagging operation, large residual desulphurization slag, causing resulfurization of molten iron; at the same time, high viscosity desulphurization slag...

Claims

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Application Information

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IPC IPC(8): C21C1/02C21C7/064
Inventor 欧阳德刚邹继新李具中王清方罗安智陶晓林胡清明
Owner WUHAN IRON & STEEL (GROUP) CORP
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