Novel method for producing iron ore sintering mine additive

Abstract

The invention relates to a manufacturing method of a novel iron ore sinter additive. The invention is characterized in that the method comprises steps of adding basic oxider CaO, dolomite powder, stabilizer active MO in saponification discharge dregs of propylene oxide by chlorophydrin method, intensive mixing, reacting for 15min to 30min at 500 DEG C to 850 DEG C and constant pressure, removing harmful dissociated substances in the saponification discharge dregs, removing 20% to 67% of moisture content, milling the saponification discharge dregs to powder of 80 meshes to 300 meshes, thus obtaining the novel iron ore sinter additive. The invention uses saponification discharge dregs of propylene oxide by chlorophydrin method as main materials, thus the production cost is low. The chemicalsolid waste is recycled. The invention prepares grains from the sinter material in an improved manner, and drum index of sinter in the roasting process is improved, return fine rate being reduced, production of sinter being improved, and manufacturing efficiency of ironmaking being improved. Ore forming rate of the sinter and intensity are improved obviously, thus manufacturing cost of steel-making is reduced.

Description

technical field [0001] The invention relates to a production method of an iron ore sinter additive, in particular to a method for producing an iron ore sinter additive by using propylene oxide saponification discharge slag from a chlorohydrin method as a main raw material. Background technique [0002] In the production process of propylene oxide by the chlorohydrin method, calcium hydroxide solution commonly known as milk of lime is generally used as saponification agent in China at present, or calcium carbide mud is used to replace part of milk of lime as saponification agent to reduce direct production costs. The technical characteristics of using lime milk and calcium carbide mud as saponification agent are that the raw materials are easy to obtain, the technology is simple, and the operation is convenient. However, there are disadvantages such as a large amount of saponification waste residue and serious pollution to the surrounding environment. In addition, my country'...

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Problems solved by technology

[0003] The purpose of the present invention is to use the existing chlorohydrin method propylene oxide saponification discharge slag as the main raw material to produce iron ore sinter additives to solve the problems of poor sintering granulation effect, low sintering mineralization rate and strength, To solve the problems of high production costs, a production method for iron ore sinter additives is provided

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