Sintered ore pulverization inhibitor and adding method thereof

Abstract

The invention provides sintered ore pulverization inhibitor and an adding method thereof. The sintered ore pulverization inhibitor comprises the following chemical components by weight percentage: 65-85% of MgCl2, 3-7% of CaCl2, 5-15% of H3BO2 and 5-15% of CaO B2O3 4H2O. The adding method comprises the following steps that: pulverization inhibitor which is prepared and uniformly mixed is stored in a liquid storage pool; at a first spraying point, a 4.5kw pump and a spray tube are adopted for spraying sintered ores in a circular cooler; at a second spraying point, a 4.5kw pump and a spray nozzle are adopted for spraying a finished sintered ore belt; and at a third spraying point, a 7.5kw pump and an atomizing spray gun are adopted for spraying a finished product belt. After the pulverization inhibitor is sprayed to the finished sintered ores, the low-temperature reduction degradation index of the sintered ores is reduced, the breathability of a blast furnace is improved, the comprehensive coke ratio is reduced, and the yield of ferrum is improved; the content of chlorine is reduced, so the corrosion on a bag-type dust collector of the blast furnace is relieved; and simultaneously, the generation amount of TCDD (tetrachlorodibenzo-p-dioxin) is reduced, so the environmental pollution is avoided.

Description

technical field [0001] The invention belongs to the field of additives for sintered ore, and in particular relates to a pulverization inhibitor for reducing the pulverization rate of low-temperature reduction of sintered ore and an adding method thereof. Background technique [0002] At present, the iron-containing raw materials for sintering in many domestic sintering plants are mainly rich ore powders imported from Australia, Brazil, South Africa or India, and the main mineral composition is Fe 2 o 3 Mainly hematite, and contains higher Al 2 o 3 . Therefore, the pulverization of the produced sinter is relatively serious, and the use of severely pulverized sinter in blast furnace smelting will inevitably lead to poor air permeability of the material column, resulting in low molten iron production, increased coke consumption, and increased production costs per ton of iron. [0003] In order to eliminate the above defects, the main measure taken at this stage is to spray ...

AI Technical Summary

Problems solved by technology

[0004] 1. Spraying CaCl on sinter 2 After that, the blast furnace dust removal corrosion is relatively large;

[0005] 2. It is easy to produce dioxin and pollute the environment;

[0006] 3. The amount of spraying is relatively large, reaching 2% of the weight of sinter, which is easy to block the sieve of the next process, resulting in unclean sieve of the blast furnace returning ore, and the 5mm part of the sinter entering the furnace increases