Puddling additive and predation method thereof

Abstract

The invention relates to a puddling additive which is prepared from the following materials by weight percent: 60-120 percent of boric sludge and 5-40 percent of calcium oxide. Adding the puddling additive in sintering and pellet materials can ensure stable operation of a blast furnace, increase the yield by as high as 6 percent, reduce coke ratio by 35kg / t iron, improve the quality of cast iron, reduce the sulphur content, increase the first-grade product rate, ensure abundant heat of slag iron and favorable flowability, reduce the iron condensing amount of liquid iron in the slag iron runner and liquid iron tank, lower the consumption of metal iron, make it easy to discharge iron slag, reduce the labor intensity for furnace men, reduce the consumption of auxiliary materials such as lime stone and reduce the blowout amount of furnace dust.

Description

technical field [0001] The invention relates to an iron-making additive added in sintering and pellet batching in the iron and steel smelting process and a preparation method thereof. Background technique [0002] At present, iron and steel enterprises basically use boric acid, phosphate fertilizer, combustion improver, and sintering agent in the sintering process. These additives are either single-effect or compound crude and low-efficiency, which directly affects the comprehensive income of ironmaking. And at present the environmental pollution in the domestic boron industrial production is more serious, only the amount of boron mud produced in the production of borax by carbon-soda processing boron ore just reaches 1,000,000-1,200,000 tons a year, and the stockpiling and disposal of boron mud not only takes up a large amount of land, but also It will alkalize the soil near the stockyard and cause the migration and transformation of boron, causing environmental pollution. ...

AI Technical Summary

Problems solved by technology

[0002] At present, iron and steel enterprises basically use boric acid, phosphate fertilizer, combustion improver, and sintering agent in the sintering process. These additives are either single-effect or compound crude and low-efficiency, which directly affects the comprehensive income of ironmaking.

And at present the environmental pollution in the domestic boron industrial production is more serious, only the amount of boron mud produced by carbon-soda method processing boron ore to produce borax just reaches 1,000,000-1,200,000 tons a year, and the stockpiling and disposal of boron mud not only takes up a large amount of land, but also It will alkalize the soil near the stockyard and cause the migration and transformation of boron, causing environmental pollution