Novel process method for co-processing hazardous waste hw18 through converter

Abstract

The invention discloses a novel process method for co-processing hazardous waste hw18 by a converter. The novel process method comprises the following steps of firstly, pretreating incineration residue hw18, and screening or briquetting the incineration residue hw18 for multiple times, so that the incineration residue hw18 meets the use requirements. Then, mixing the hw18 meeting the requirements with slag charge according to a certain proportion, finally, feeding the mixture and a scrap steel into the converter together to serve as an auxiliary backing material for steelmaking. According to the novel process method for co-processing the hazardous waste hw18 through the converter, investment of new equipment is not needed, an original converter process does not need to be changed, the novel process method has the advantages of being thorough in processing, low in processing cost and simple in process and operation.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a new process for co-processing hazardous waste hw18 with a converter. Background technique [0002] hw18 Incineration disposal residues (772-002-18: domestic waste incineration fly ash; 772-003-18: bottom slag, fly ash and wastewater treatment sludge produced during hazardous waste incineration, pyrolysis and other disposal processes; 772-004-18 : Non-vitreous substances and fly ash produced in the disposal process of hazardous waste plasma, high-temperature melting, etc.; 772-005-18: Hazardous waste such as waste activated carbon produced in the process of solid waste incineration and disposal, the ingredients are sio2, cao, Mainly Al2O3, FeO, containing other heavy metals, the main components are basically the same as the converter slagging coolant. [0003] Introduction to existing disposal technologies: [0004] Resource utilization: resource recovery of valuable heavy m...

AI Technical Summary

Problems solved by technology

Advantages: thorough disposal; Disadvantages: need to build a professional enterprise, complex process, long process, huge investment in equipment; high requirements for useful elements, low proportion of useful elements, poor economic benefits; high disposal costs, unstable economic benefits; resource disposal Less hazardous waste, unstable production efficiency

Disadvantages: The amount of co-processing is large now, which has a great impact on the production capacity of cement kilns, which is not conducive to cement enterprises seeking comprehensive benefits, and the driving force of interests is reduced. Now it is basically saturated and the growth is not large; in addition, the requirements for heavy metal content are strict, and the proportion Strict control; in the end, heavy metals will finally enter the concrete building to dilute and solidify, and will leach into the water and soil after a long time, affecting the environment

Disadvantages: high solidification and landfill costs; professional rigid landfills are required, and cannot be disposed of in ordinary landfills; in fact, the sludge is left in place, which does not eliminate the risk of leaching and polluting the environment after a long period of time; there are few professional rigid landfills and no capacity Landfill a large amount of hw18 incineration residue, and the disposal cost is high

Disadvantages: need to invest in professional equipment, which is a huge investment; the power of the plasma furnace is relatively small, and the disposal volume is relatively small; the disposal cost is high

Disadvantages: need to invest in professional equipment, huge investment; complex process, small disposal volume; high disposal cost; low product yield, low output value, poor economic benefits of enterprises

Images