Blast furnace batching method based on final slag alkalinity

Abstract

The invention provides a blast furnace batching method based on final slag alkalinity. A computational formula of the final slag alkalinity is a quotient in a division, wherein the dividend is the difference between the sum of the amount of CaO taken in by sintering ores, the amount of CaO taken in by pellet ores, the amount of CaO taken in by charging coke and the amount of CaO taken in by charging coal dusts, and the amount of CaO consumed by desulfuration; the divider is the difference between the sum of the amount of SiO2 taken in by sintering ores, the amount of SiO2 taken in by pellet ores, the amount of SiO2 taken in by charging coke and the amount of SiO2 taken in by charging coal dusts, and the amount of SiO2 commuted by Si carried away by cast iron; and the usage amount of the sintering ores and the pellet ores can be directly computed out through the formula. The blast furnace batching method based on the final slag alkalinity can effectively reduce effects of the SiO2 brought by ash in blast furnace charging fuel of charging coke, coal dusts and the like on the blast furnace final slag alkalinity, has a good and stable blast furnace final slag alkalinity, guarantees the stable smooth operation of the blast furnace production, simplifies the daily production regulation of the blast furnace and has remarkable effects on stabilizing the blast furnace productivity and reducing the blast furnace fuel consumption.

Description

technical field [0001] The invention belongs to the utilization of ironmaking technology, and in particular relates to a method for calculating daily batching of blast furnaces based on final slag basicity. Background technique [0002] At present, the calculation of the batching of the domestic blast furnace structure is generally based on the actual production conditions of the blast furnace to determine the basicity of the furnace, and based on the basicity of the furnace, the structure of the blast furnace is calculated according to the basicity balance of the given basicity. Proportion of middle sinter and pellets. The specific calculation formula is: furnace basicity = (amount of CaO brought in by sinter + amount of CaO brought in by pellets) / (SiO brought in by sinter 2 Amount + SiO brought in by pellets 2 quantity). The advantage of using this calculation method is that the equation is simple and easy to calculate and master. However, with the enlargement of the...

AI Technical Summary

Problems solved by technology

However, with the enlargement of the blast furnace, the higher the required iron content of the raw material, the lower the CaO content per unit of sintered ore at the same basicity, resulting in SiO brought into the furnace by the ash in the blast furnace fuel such as coke and pulverized coal. 2 The impact on the basicity of the blast furnace slag increases, because the fluctuation of the basicity of the blast furnace slag directly affects the stability of the blast furnace production, and at the same time increases the fuel consumption of the blast furnace