Resource Utilization Process of Synergistically Wasted Asbestos Using Steelmaking Production

Abstract

The invention discloses a process for resource utilization of waste asbestos by using steelmaking to produce synergistic waste asbestos, which is implemented according to the following process steps: 1) Firstly, asbestos waste, waste oil and waste steel slag fine particles with a particle size of 0.75 mm to 10 mm are mixed according to the mass percentage Mix and stir for 30 minutes at a ratio of 35:10:55, and then press on a high-pressure dry powder briquette machine to form spheres with a diameter of 5-30mm; 2) Transport these spheres to the steelmaking process platform as a slag-pressing defoamer for use; 3) During the process of converter or electric furnace slagging, add the above-mentioned slag-pressing defoamer to the slag pot for slag-pressing and defoaming, and the dosage is 3-5kg per ton of steel; The process flow can be processed. The invention solves the problem of slag pressing and defoaming in the converter steelmaking slag removal process, and at the same time realizes the harmless transformation of waste oil and asbestos.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and utilization of hazardous wastes and iron and steel metallurgy, and relates to a resource utilization process of synergistic waste asbestos produced by 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 resistance, insulation, etc. It is widely used in machinery industry, refractory material industry, automobile manufacturing and other fields. 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 wastes include 262-060-36, etc., and there are 9 categories. The hazardous waste factor is toxicity. According to the research study, the inventor found that asbestos...

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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.