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

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 ...