Waste asbestos resource utilization process cooperating with steelmaking production

Abstract

The invention discloses a waste asbestos resource utilization process cooperating with steelmaking production. The waste asbestos resource utilization process cooperating with steelmaking production is implemented according to the following process steps of 1) firstly, uniformly mixing the asbestos waste, waste grease and waste steel slag fine particles with the particle size of 0.75-10mm according to the mass percent ratio of 35: 10: 55, stirring for 30 minutes, and then pressing into spheres with the diameter of 5-30 mm on a high-pressure dry powder ball press; 2) transporting the spheres toa steelmaking process platform as a slag pressing defoaming agent for later use; (3) in the deslagging process of a converter or an electric furnace, adding the slag pressing defoaming agent into a slag tank for slag pressing defoaming, wherein the dosage of the slag pressing defoaming agent is 3-5 kg per ton of steel; and 4) treating the converter or electric furnace steel slag added with the slag pressing defoaming agent according to a normal technological process. According to the waste asbestos resource utilization process cooperating with steelmaking production, the purpose of slag pressing defoaming in the converter steelmaking slag tapping process is achieved, and harmless conversion of the waste grease and asbestos is realized.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and utilization of hazardous waste and iron and steel metallurgy, and relates to a process for resource utilization of waste asbestos in cooperation with steelmaking. Background technique [0002] Asbestos is an important mineral raw material in the process of national economic construction. It has the advantages of heat insulation, acid and alkali corrosion resistance, and insulation. It is widely used in the fields of machinery industry, refractory material industry, and automobile manufacturing industry. Existing research and literature have proved that asbestos can cause pulmonary fibrosis and lung and pleural tumors. Therefore, my country lists waste asbestos as hazardous waste. In the national hazardous waste catalog, HW36 asbestos waste has 262-060-36, etc., and there are 9 categories. The hazardous waste factor is toxicity. The inventor has found that asbestos is a hydrous si...

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Problems solved by technology

[0005] In the mechanical processing and petrochemical industries, a certain amount of waste oil containing heavy metal elements is also a hazardous waste. The inventor found through research that it is listed in the national hazardous waste catalog of HW08 class 900-199-08 ~ 900-214-08 Among the 12 kinds of waste oils, the risk factor of toxicity is mainly metal pollution. The disposal cost of these waste oils is high, and it is difficult to recycle them, which is one of the processing problems in the industry.