Boric sludge pellet binder/iron smelting auxiliary and preparation method of boric sludge pellet binder/iron smelting auxiliary

Abstract

The invention relates to a boric sludge pellet binder / iron smelting auxiliary and a preparation method of the boric sludge pellet binder / iron smelting auxiliary, and belongs to the technical field of metallurgy. The boric sludge pellet binder / iron smelting auxiliary comprises the following raw materials in percentage by weight: 75-84% of boric sludge, 6-10% of boric ore powder and 10-15% of caustic-burned magnesia powder, wherein the content of boron in the boric ore powder is 10-16%, and the content of magnesium in the boric ore powder is 70-90%. The boric sludge pellet binder / iron smelting auxiliary can completely replace bentonite usually used and solve the problems that the calcination temperature of pellets is too high and the compressive strength of the pellets is lower because the magnesium component (the iron smelting auxiliary) in pellet ore is difficult to compound and add; the boric sludge is used as the main raw material, besides iron smelting auxiliaries such as the magnesium component are added, so that the content of noxious constituent such as silicon dioxide is greatly reduced, and the fluidity of molten iron and slag is obviously improved during blast-furnace iron smelting; the boric sludge pellet binder / iron smelting auxiliary has a good desulfurization effect, so that the smooth and stable furnace condition is obviously improved.

Description

technical field [0001] The invention relates to a boron mud pellet binder / ironmaking auxiliary and a preparation method thereof, belonging to the technical field of metallurgy. Background technique [0002] A large amount of borax tailings (also known as borax mud) will be discharged during the production of borax. Because the boron mud is very fine, the -200 mesh sieve pass rate exceeds 70%, the surface will be dusty after air drying, and because the boron mud contains potassium and sodium components, it will pollute the groundwater source. [0003] At present, the country generally adopts a fixed-point centralized stacking method to control it, but it has not received good results. [0004] According to laboratory analysis, the content of magnesium oxide and boron in boron mud is relatively high, which can play an auxiliary role in blast furnace ironmaking. Therefore, using boron mud to prepare pellet binder is a way to turn boron mud from waste into treasure. [0005] ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a boron mud pellet binder / ironmaking auxiliary and its preparation method, which can completely replace the commonly used bentonite, and can also solve the problem of magnesium content in pellets (ironmaking additives). Auxiliaries) are difficult to add, resulting in problems such as high calcination temperature and low compressive strength of the pellets; boron mud is used as the main raw material, and ironmaking additives such as magnesium are added at the same time, which greatly reduces the harmful effects of silica and other The content of ingredients can significantly improve the fluidity of molten iron and slag during blast furnace ironmaking, and has a good desulfurization effect, and has a significant improvement in the smoothness of the furnace condition