Iron ore sintering method for removing arsenic, tin and zinc during sintering process

Abstract

The invention discloses an iron ore sintering method for removing arsenic, tin and zinc during a sintering process. The method comprises the steps that a pellet is prepared with a pelletizing disc, wherein raw materials used for preparing the pellet comprise 80-90% of iron ore concentrate containing arsenic, tin and zinc, and 10-20% of coke powder; the pellet is mixed into a sintering mixture, andthe mixture is prepared from the components in percentage by weight: 10-20% of the pellet, 30-35% of 1# Australian iron ore powder, 10-15% of 2# Australian iron ore powder, 30-35% of second concentrate, 1.0-3.0% of serpentine, 3.0-3.5% of quicklime, 0-1.5% of digested dolomite, 7%-9% of limestone, and 4.10-4.20% of the coke powder; the mixture is placed into a sintering cup through distributing equipment, and the raw mixture is ignited, sintered and cooled through the sintering cup to obtain sintered ore. The purpose of the invention is to provide the iron ore sintering method for removing arsenic, tin and zinc during the sintering process, and to obtain sintered ore with better metallurgical properties.

Description

technical field [0001] The invention relates to the technical field of agglomeration of ironmaking raw materials, in particular to an iron ore sintering method for removing arsenic, tin and zinc during the sintering process. Background technique [0002] With the development of the iron and steel industry, my country's iron ore resources are increasingly scarce, and some complex and difficult iron ore resources are being vigorously developed and utilized. Baotou Iron and Steel Huanggangliang Iron Mine is accompanied by a large amount of non-ferrous metals such as arsenic, tin and zinc, and the symbiotic relationship is very complicated, which brings great difficulties to mineral separation. Since the 1970s, many scholars have conducted a lot of research on the comprehensive utilization of the mine. Among them, the biological pre-oxidation method has the characteristics of environmental friendliness and low cost, but it is mainly used for the removal of arsenic in gold ore, ...

AI Technical Summary

Problems solved by technology

Among them, the biological pre-oxidation method has the characteristics of environmental friendliness and low cost, but it is mainly used for the removal of arsenic in gold ore, and the biological pre-oxidation method cannot remove tin and zinc in the ore; the multi-stage grinding method is used to obtain The content of arsenic, tin and zinc in the iron ore concentrate is significantly reduced, but the content still exceeds the requirements of the blast furnace for smelting raw materials

The comprehensive utilization of iron, arsenic, tin and zinc can be realized at the same time by adopting the coal-based rotary kiln strong reduction roasting process, which has low requirements on the environment and equipment, but the required roasting time is long and the energy consumption is high, resulting in low output and high cost. Not put into industrial application

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