Resource regeneration method for hazardous waste

Abstract

The invention discloses a resource regeneration method for hazardous waste. According to the method, fire melting is conducted in an oxygen-enriched side blown converter by taking metal-containing solid hazardous waste as a raw material, taking organic liquid hazardous waste as auxiliary fuel, taking hazardous waste such as waste activated carbon or residual electrodes as a reducing agent and adopting a fluxing agent in a matched mode, organic matter in the materials generates heat through oxygen-enriched combustion pyrolysis, copper, nickel, precious metals and the like are fused and reducedinto crude metal melt at high temperature, low-melting-point metals such as lead, zinc and tin are volatilized for smoke dust recovery, metals such as iron, aluminum and calcium and silicon take participation in a slagging reaction to generate slag, and flue gas is fully combusted, treated and then exhausted after reaching the standard. The crude metal melt and the slag settle and are separated inan oxygen-enriched side blown converter hearth, cast ingots of the crude metal melt are discharged from an alloy port arranged at the bottom of the hearth, crude metal ingots are generated, the slagis discharged from a slag port over the alloy port, and water-quenched slag is generated through water quenching. The resource regeneration method for the hazardous waste has the advantages of being wide in application range, capable of saving energy, environmentally friendly, good in operation condition and high in metal recycling rate.

Description

technical field [0001] The invention belongs to the joint technical field of non-ferrous metal smelting technology / hazardous waste disposal, and in particular relates to a resource regeneration method of hazardous waste. Background technique [0002] With the development of science and technology and industry, the amount of solid and liquid hazardous waste and industrial waste residue is also increasing, causing serious harm to the environment. On the other hand, these wastes are also valuable resources that can be recycled. For example, some hazardous wastes contain a large amount of valuable metals, and some hazardous wastes have high calorific value. Because the country puts forward higher requirements for comprehensive utilization of resources and energy conservation and emission reduction of enterprises, there is an urgent need for a production method characterized by comprehensive utilization of various hazardous wastes. [0003] Valuable solid hazardous waste commonl...

AI Technical Summary

Problems solved by technology

Blast furnace treatment requires pre-sintering of waste materials, and must use expensive metallurgical coke as a reducing agent, resulting in high production costs; in addition, blast furnaces are prone to tuyere blockage during the production process, and workers often need to use iron brazing to manually Dredging vents has the disadvantages of complicated operation and harsh production environment

In view of the shortcomings of traditional treatment methods, Chinese invention patent CN 101768670 proposes to use a flash furnace and a reducing and depleting electric furnace to smelt heavy metal materials. The adaptability of raw materials is relatively poor, and the water content of raw materials is required to be less than 0.8%, and the particle size is required to be less than 1mm. The harsh conditions for entering the furnace lead to complex pretreatment of raw materials and high costs

[0005] Incinerators are widely used in the hazardous waste disposal industry. They can treat organic solid waste (such as waste activated carbon, residual poles, etc.) and organic liquid waste (such as waste mineral oil, etc.). Valuable solid hazardous waste still cannot be treated, and the slag produced by incineration is still hazardous waste, which needs to be further solidified and landfilled. In addition, the incinerator is filled with air, and the amount of waste gas generated by incineration is large

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