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Improved type slag splashing furnace protecting material and preparation method thereof

A technology of slag splashing to protect the furnace and furnace charge, which is applied in the manufacture of converters, sustainable waste treatment, solid waste management, etc., can solve problems such as furnace temperature drop, achieve the effects of increasing service life, reducing production costs, and protecting the environment

Inactive Publication Date: 2008-06-18
PANZHIHUA SHUNTENG GRP METALLURGY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since each slag splash takes about 6-8 minutes, it will cause adverse effects such as a drop in furnace temperature, which is obviously incompatible with the development trend of energy saving, consumption reduction and high efficiency in the contemporary steelmaking industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The mass percentage of MgO in the slag-splashing furnace charge is 66.3%, the total mass percentage of C is 9.6%, and the mass percentage of TiO2 is 2.5%.

[0025] The specific ratio is 8-5mm waste magnesia carbon brick 20%, 5-3mm waste magnesia carbon brick 10%, 3-0mm waste magnesia carbon brick 26%, 0-1mm high titanium slag 8%, 0-1mm titanium corundum 4 %, metal magnesium powder 0.9%, metal Al powder 1.4%, ferrosilicon 8%, <0.088mm fused magnesia 17.5%.

[0026] First weigh according to the above ratio, then mix the granules for one minute, then add 1 / 3 of the binder (caustic soda and water glass solution), mix for 1 minute, add fine powder and mix for another 3 minutes, then add the rest 2 / 3 of the binder, continue to mix for 3 minutes before discharging, compacted by a compactor and then compressed into a 40×40×50mm agglomerate for use.

Embodiment 2

[0028] The slag-splashing furnace charge MgO mass percentage content is 60.2%, the C mass percentage content is 15.1% and the TiO2 mass percentage content is 5.5%.

[0029] The specific ratio is 8-5mm waste magnesia carbon brick 25%, 5-3mm waste magnesia carbon brick 20%, 3-0mm waste magnesia carbon brick 30%, 0-1mm high titanium slag 12%, <88um titanium concentrate 4% , metal magnesium powder 0.5%, metal Al powder 2%, 0-1mm ferrosilicon alloy 6.5%.

[0030] First weigh according to the above ratio, then mix the granules for 2 minutes, add 1 / 3 of the binder (caustic soda and water glass solution), mix for 3 minutes, add fine powder, and mix for 3 minutes, add the remaining 2 / 3 3, continue to mix for 3 minutes before discharging, compacted by a compactor and then compressed into a 40 × 40 × 50mm agglomerate for use.

[0031] The performance comparison with the original product after testing and use is as follows:

[0032] Item Comparative Example Example 1 Example 2

[0033]...

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PUM

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Abstract

The invention provides modified slag splashing maintenance material which can be used in multiple furnaces and a preparation method thereof. The invention is characterized in that the maintenance material comprises waste magnesium carbon bricks, complex deoxidizer (metal magnesium powder, metal aluminum powder and ferrosilicon alloy), raw materials containing TiO2, etc. The mass percentage is: 30 percent to 75 percent of MgO, 3 percent to 20 percent of total C, 2 percent to 10 percent of Al2O3, 1 percent to 10 percent of TiO2, 0.3 percent to 5 percent of Mg, 1 percent to 12 percent of Al, and the residue is SiO2. The complex deoxidizer amount obviously improves the reduction of the furnace temperature on FeO and improves the yield rate of the converter steelmaking. Specifically, nitrogen that is blown in when TiO2 and splashing slag are introduced helps to form the nitrogen titanium compound with high melting point, which improves the viscosity of the slag, enhances the adhesion force of the splashing slag material to MgO-C bricks of lining bricks of the converter and improves the maintenance effect. And the bonding strength of the splashing slag layer with the converter lining bricks is improved because of the join of TiO2. The obvious effect of the splashing slag maintenance technology is obtained that one time of the slag splashing can support 3 to 5 converters rather than just one before.

Description

technical field [0001] The invention relates to an improved slag-splashing furnace charge and its preparation method, in particular to a compound deoxidizer and TiO-containing 2 A slag-splashing furnace protection material prepared from raw materials that can be used repeatedly and a preparation method thereof belongs to the field of steel-making slag-splashing furnace protection technology and refractory materials. Background technique [0002] Furnace protection by slag splashing is an effective furnace protection technology for converters. Slag splashing is to leave part of the final slag after the converter is tapped, and adjust the viscosity and magnesium oxide content of the slag to an appropriate range by adding protection materials. Inject high-velocity nitrogen to spray the slag onto the furnace lining for cooling. Solidified to form a solid slag layer, as a consumable refractory layer, the slag layer reduces the mechanical erosion and physical and chemical erosion...

Claims

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Application Information

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IPC IPC(8): C21C5/36C04B18/14
CPCY02W30/91
Inventor 徐宏武于琪芳
Owner PANZHIHUA SHUNTENG GRP METALLURGY MATERIAL
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