Desulfurating agent for out-of-furnace treatment and preparation method thereof

Abstract

The invention relates to a desulfurating agent for out-of-furnace treatment and a preparation method thereof. The technical scheme is achieved as follows: putting waste residues of out-of-furnace treatment in water with a temperature of 80-374 DEG C according to a solid-to-liquid ratio of 1:(2-8), stirring the waste residues for 2-60 minutes and then filtering and drying the waste residues; then uniformly mixing 30-80 weight percent of the treated waste residues of the out-of-furnace treatment and 20-70 weight percent of additive and then packaging or respectively packaging. The waste residuesof the out-of-furnace treatment comprise the following chemical components by weight: 30-65 percent of CaO, 8-35 percent of SiO2, 2-30 percent of Al2O3, 0.2-3.5 percent of S and the balance of MgO, CaF2, MnO, FeO, P and other impurities. The additive is uniformly mixed and packaged or respectively packaged according to the following components by weight: 70-100 percent of lime, 0-30 percent of one of bauxite, aluminum oxide and fluorite and 1-10 percent of one of aluminum ball and calcium carbide. The invention has the characteristics of simple process, low energy consumption and low cost; and the prepared desulfurating agent for the out-of-furnace treatment has good metallurgical property and strong desulfurating capacity.

Description

technical field [0001] The invention belongs to the technical field of desulfurizers for iron and steel metallurgy. In particular, it relates to a desulfurizing agent for treatment outside a furnace and a preparation method thereof. technical background [0002] In order to improve the quality of steel products, reduce production costs, and shorten the production cycle, more and more attention has been paid to the treatment outside the furnace in the process of steel production. Out-of-furnace treatment is the general term for molten iron pretreatment and molten steel refining outside the furnace. Metallurgical means of chemical properties. [0003] A large amount of waste slag will be produced in the process of external treatment of iron and steel smelting furnaces. Due to reasons such as high alkalinity, metal particles and harmful elements, its utilization methods and utilization rate are extremely limited. more serious pollution. [0004] At present, the waste slag t...

AI Technical Summary

Problems solved by technology

The preparation process of the refining agent also needs to be heated at a high temperature for a long time in the heating furnace, and the preparation process of the refining agent consumes a lot of energy