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Application of desulfurized injection residues of LF furnace and thermal insulating agent prepared by desulfurization injection residues of LF furnace

A heat-insulating agent and a technology of injecting residual slag, which is applied in the field of application and the heat-insulating agent manufactured by the by-product of steelmaking, can solve the problems of inability to achieve high alkalinity and insufficient alkalinity, realize waste utilization, improve purity, The effect of preventing excessive temperature drop

Active Publication Date: 2013-09-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of this granular thermal insulation agent greatly reduces dust, the main components of carbonized rice husk and fly ash are SiO 2 , so its alkalinity is insufficient, and it is basically acidic. In order to increase the alkalinity of some insulation products, lime has been added, but it still cannot achieve high alkalinity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0035] The LF furnace desulfurization injection residue slag in this embodiment is recovered from the steelmaking plant. (In the process of producing steel in a steelworks, after the LF furnace desulfurizes molten steel and pours, LF furnace desulfurization and injection residues will be generated.)

[0036] The manufacturing process of using LF furnace to desulfurize and inject residual slag to make thermal insulation agent is as follows:

[0037] (1) breaking the LF furnace desulfurization injection slag recovered by the steelmaking plant;

[0038] (2) Grinding the broken LF furnace desulfurization slag and carbonized rice husk and wollastonite into powder and mixing according to the proportion shown in Table 1, and using a binder to bond each component together;

[0039] (3) granulating the mixture disc in the step (2) into balls with a particle size of 3 to 10 mm;

[0040] (4) Bake.

[0041] Listed in the present case embodiment 1-5 in table 1, the mass parts of each co...

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Abstract

The invention discloses an application of desulfurized injection residues of an LF furnace and a thermal insulating agent prepared by the desulfurized injection residues of the LF furnace. The thermal insulating agent comprises the components, in parts by mass: 70-90 parts of the desulfurized injection residues of the LF furnace, 5-20 parts of carbonized rice husks, 5-20 parts of calcium silicate, and a defined amount of a binder. The thermal insulating agent has suitable melting point, good spreading performance and excellent insulation resistance; and the thermal insulating agent has high alkalinity, and thereby having good adsorption of slag inclusions in molten steel.

Description

technical field [0001] The present invention relates to the use of a steelmaking by-product and an insulating agent manufactured by using the steelmaking by-product, in particular to the use of LF furnace desulfurization and slag injection and the insulating agent produced therefrom. Background technique [0002] LF furnace desulfurization slag is a kind of waste in the steelmaking process. It is a desulfurization slag composed of converter slag, lime, pre-melted slag, aluminum deoxidizer, calcium deoxidizer, etc. added in LF furnace. [0003] Dumping the discarded LF furnace desulfurization and injection residue directly will bring adverse effects to the environment. In addition, the treatment of LF furnace desulfurization and injection residue will also consume a lot of cost. [0004] Therefore, the current use of LF furnace desulfurization and injection of residual slag is to use it as a roadbed material and cement raw material after being processed by the slag treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064C21B3/04C21C7/00C21C7/076
CPCY02P10/20Y02W30/50
Inventor 王俊凯马志刚周继刚
Owner BAOSHAN IRON & STEEL CO LTD
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