Novel process method for co-processing hazardous waste hw17 by sintering machine

Abstract

The invention discloses a novel process method for co-processing hazardous waste hw17 by a sintering machine, the novel process method comprises the following steps of firstly, surface treatment waste hw17 is transported to a project site in a closed manner by using an automobile, the bagged surface treatment waste hw17 is transported to the upper part of a stainless steel stock bin by using an electric single-beam crane, the material is fed into the stock bin through a tank breaker or a bag breaker at the upper part of the stock bin, and a top sealing cover is closed after the material is loaded; and the surface treatment waste hw17 in the stock bin enters a pull-type belt weigher from the bottom of the stock bin, is proportionally blended into a sintering mixture, enters a sintering mixture stock bin after being mixed, then enters the sintering machine for sintering, and finally is sintered into a sintered ore finished product. The novel process method for co-processing the hazardous waste hw17 by the sintering machine does not need investment of new equipment, does not need to change an original sintering machine process, and 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 hw17 by sintering machines. Background technique [0002] Hw17 is surface treatment sludge containing heavy metals (pickling sludge: 336-064-17; electroplating sludge: 336-053-17; 336-054-17; 336-055-17; 336-058-17; 336 -060-17; 336-062-17; 336-067-17; 336-068-17; 336-069-17; 336-101-17) and other hazardous wastes, mainly composed of sio2, cao, Al2O3, containing The main components of other heavy metals are basically the same as those of blast furnace ironmaking raw materials and slagging agents. [0003] Introduction to existing disposal technologies: [0004] Resource utilization: the sludge is dissolved with sulfuric acid, the mud is removed by pressure filtration, and the filtrate is oxidized to remove iron; after iron removal, the filtrate is heated, reduced, and pressure filtered to extract chromium hydroxide, and the chro...

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: To build a professional incineration enterprise requires a large investment in equipment, and a tail gas treatment system is required in the follow-up; the sludge residue after incineration still needs to be disposed of professionally, and the disposal is not complete; the process equipment and operation are complicated, and professionals are required; the disposal cost is high

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 hw17 sludge

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

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