A reactive filter material for coking wastewater treatment and its preparation and use method

Abstract

A reactive filter material, its raw material composition and ratio are: coking coke powder: hot-rolled iron oxide scale: blast furnace dust = 1 to 2:1 to 3:1; additional binder, the amount added according to The total volume of the above three raw materials: binder = 1:1 to 3; the particle size of coking coke powder is 100-200 mesh, the particle size of blast furnace dust is 100-200 mesh, and the particle size of hot-rolled iron oxide scale is 0.5 ~2mm. Preparation method: Raw material pretreatment: mix the pretreated raw materials uniformly according to the proportion; add binder; granulate; dry; sinter and set aside. Usage method: the filter reactor equipped with the filter material of the present invention can be placed before or after the coking wastewater biochemical treatment or both before and after the coking wastewater biochemical treatment. The invention not only ensures that the treatment of coking wastewater meets the requirements, but also fully utilizes the resources of iron-containing and carbon-containing wastes, and the filter material can be returned to the sintering process after the reaction, and there is no secondary pollution problem.

Description

technical field [0001] The invention relates to a material used in the treatment of coking wastewater and a preparation and use method, specifically belonging to a reactive filter material for coking wastewater treatment and a preparation and use method. Background technique [0002] In the iron and steel metallurgical process, a large amount of iron-containing metallurgical waste will be produced, such as iron oxide scale produced in the steel rolling process, blast furnace dust generated in the blast furnace smelting process, etc. Rolled steel oxide scale is the iron-containing oxide produced on the surface of the steel after the rolled piece is rapidly cooled by water during the rolling process of the rolling mill. The amount of oxide scale accounts for about 3% to 5% of the processed steel, with an annual output of 10 million tons. Iron and steel enterprises as an example, the iron oxide scale produced in the rolling process is about 90,000 tons per year, and the iron co...

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Problems solved by technology

Regardless of the combination of technologies mentioned above, there are problems of high investment and operating costs, which are difficult for ordinary enterprises to accept

In terms of reactive filter material preparation, after searching, most of them use reducing iron powder, zinc powder, activated carbon powder, clay, etc. as raw materials to prepare a reactive filter material, but because the raw materials are all finished products, the production cost is high. When it is used in the treatment of coking wastewater, even if it can guarantee a good use effect, it cannot reduce the cost of wastewater treatment; in addition, most articles or patents refer to the preparation of reactive filter materials, such as zinc and clay. New elements and silicon elements are extremely harmful to the sintering and ironmaking process, and the filter material cannot be returned to the sintering or ironmaking process after use, which also increases the use cost virtually

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