Hazardous waste tar and dust removal powder deep processing cyclic utilization process

Abstract

The invention discloses a hazardous waste tar and dust removal powder deep processing cyclic utilization process, the process comprises the following steps of extracting tar residues from hazardous waste tar, preparing coke powder, adding dust removal ash, water and calcium oxide into a stirring tank for uniform stirring, and then adding the mixture into a solid-liquid separator for solid-liquid separation to obtain a solid material; and adding the solid material and the coke powder into a crushing cylinder, carrying out pelletizing through a ball pressing device, recycling crushed materials for reuse, feeding pellets into a rotary hearth furnace for continuous high-temperature sintering, conveying the sintered pellets into a smelting separation furnace for smelting pig iron, and cooling furnace gas for dust collection to obtain lead-zinc powder. According to the hazardous waste tar and dust removal powder deep processing cyclic utilization process, before pelletizing, the mixed material is uniformly scraped through a scraping plate, so that the weights of the prepared pellets are consistent, the sintering time of subsequent pellets is ensured to be consistent, and then the pelletsare ensured to be fully smelted; and the pelletized crushed materials can be recycled, so that material waste is avoided, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a process for deep processing and recycling of hazardous waste tar and dedusting powder. Background technique [0002] Tar residue exists in hazardous waste tar. Tar residue is a by-product of gas cooling and removal through standpipes and scrubbers. Tar residue contains coal powder, coal tar, and water. The fixed carbon content of tar residue is about 60%. The dust content is about 33%, the ash content is about 4%, and the sulfur content is about 1.6%. Flue gas dust removal is necessary for the production process, such as high-temperature flue gas of sintering head, dust removal of blast furnace and converter gas system. Elements harmful to the human body, such as elements that are harmful to the human body, are hazardous wastes. Comprehensive recycling and utilization of dedusting ash has become an inevitable choice for enterprises. In the 1970s, there have been related resea...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a deep processing recycling process of hazardous waste tar and dust removal powder, which solves the problem that hazardous waste tar cannot be reused in the traditional hazardous waste tar and dust removal powder deep processing recycling process, and the feeding is uneven during pelletizing, which causes each There is a large difference in the weight of each pellet, and it is impossible to ensure that the sintering time of subsequent pellets is consistent, and it is impossible to ensure that the pellets are fully smelted, and it is impossible to recycle the scrap generated during the pelletizing process, which is likely to cause technical problems of material waste.

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