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Method for treating solid waste through rotary hearth furnace

A rotary hearth furnace and flue gas waste heat technology, applied in the direction of rotary drum furnace, furnace, furnace type, etc., can solve the problems of high pulverization rate of metallized pellets, low grade of zinc oxide powder, waste heat utilization, etc., and achieve simplified process , Reduce production cost, improve production capacity and life effect

Active Publication Date: 2018-10-02
钢研晟华科技股份有限公司
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a method for treating solid waste in a rotary hearth furnace, which solves the problem of the low grade of zinc oxide powder recovered in the prior art, the high pulverization rate of finished metallized pellets, and the lack of waste heat. Make good use of it, causing the problem of energy waste

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  • Method for treating solid waste through rotary hearth furnace

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Embodiment 1

[0059] The solid waste materials processed by the method for treating solid waste in the rotary hearth furnace of the present invention include: blast furnace ashes, converter ashes and sintering dust removal ash, etc.; blast furnace dust includes blast furnace bag ash, blast furnace gravity ash; converter dust includes converter fine ash, converter coarse Ash and converter sludge etc. According to the actual situation, add some binders, such as bentonite, bentonite, etc. The following is an example of a rotary hearth furnace production line with an annual processing capacity of 386,500 tons. The composition and content of various solid waste materials are shown in Table 1. The rotary hearth furnace production line can process 96,000 tons of blast furnace bag ash and 57,000 tons of blast furnace gravity ash / a, converter fine ash 157,500 t / a, converter coarse ash 76,000 t / a.

[0060] According to the production requirements, the above-mentioned materials are mixed in appropri...

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Abstract

The invention relates to a method for treating solid waste through a rotary hearth furnace and belongs to the technical field of steel mill solid waste treatment. The problems that in the prior art, recycled zinc oxide powder is low in grade, and finished metallized pellets are high in pulverization rate are solved. The method for treating the solid waste through the rotary hearth furnace comprises the following steps of pelletizing, reduction and zinc-contained powder recycling, and a drying stage is further performed between the pelletizing and the reduction. The method for treating the solid waste through the rotary hearth furnace provided by the invention can be used for treating solid materials generated in the production processes of sintering, ironmaking and steelmaking.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for treating solid waste in a rotary hearth furnace. Background technique [0002] Iron and steel joint production enterprises produce a large amount of solid waste such as dust and sludge of nearly one million tons every year. If these solid wastes rich in zinc and iron cannot be fully recycled, it will not only cause waste of resources, but also pollute the environment. The rotary hearth furnace direct reduction process was first developed by the American Steel Power Company by improving the steel rolling ring heating furnace to deal with the solid waste of the steel plant. [0003] As a coal-based rapid direct reduction process technology, the rotary hearth furnace can not only produce metallized iron materials with high metallization rate, but also efficiently remove harmful elements such as Zn, Pb, K, Na, Cl, etc. It is a relatively good high-temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/08C21B13/14C22B1/24C22B7/02C22B19/30C22B19/20C22B19/34
CPCC21B13/08C21B13/14C22B1/2406C22B7/001C22B7/02C22B19/20C22B19/30C22B19/34Y02P10/20
Inventor 周和敏王海风高建军徐洪军王锋严定鎏林万舟齐渊洪
Owner 钢研晟华科技股份有限公司
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