Method and device for improving concentration stability of calcium chloride solution used for sintering ore

Abstract

The invention discloses a method and device for improving concentration stability of calcium chloride solutions used for sintering ore. The device comprises a calcium chloride mother solution pool, calcium chloride solution pools and spraying devices. The calcium chloride mother solution pool is communicated with the calcium chloride solution pools through a pump, and the spraying devices are arranged on a material supplying flow line behind a number three sintering ore finished product bin and a number four sintering ore finished product bin and communicated with the calcium chloride solution pools through spraying pumps, and stirring pumps are arranged on the calcium chloride mother solution pool and / or the calcium chloride solution pools, and the corresponding stirring pumps are started to stir when liquid in the calcium chloride mother solution pool and / or the calcium chloride solution pools are pumped. Due to the facts that the spraying devices are arranged on the material supplying flow line of the number three sintering ore and the number four sintering ore, the stirring pumps are arranged on the calcium chloride mother solution pool and / or the calcium chloride solution pools, and stirring is performed before the calcium chloride mother solutions and / or calcium chloride solutions are pumped and in the process of pumping the calcium chloride mother solutions and / or calcium chloride solutions, the problem of calcium chloride precipitation is solved, the concentration stability of the calcium chloride solutions is improved, and meanwhile resource loss and environment pollution caused by discharging of calcium chloride are eradicated.

Description

technical field [0001] The invention belongs to the technical field of the metallurgical industry, and relates to a chlorination method for improving sintering that can eliminate calcium chloride precipitation, thereby improving the stability of the concentration of calcium chloride solution, and at the same time preventing resource loss and environmental pollution caused by calcium chloride efflux. A method and a device for stabilizing the concentration of a calcium solution. Background technique [0002] Most of the iron ore in our country is lean ore. It is uneconomical to put the lean ore directly into the furnace for ironmaking. Therefore, the lean ore must be crushed to select high-grade concentrate, and then the concentrate powder is agglomerated into artificial rich ore. Only then can it be smelted in a blast furnace. Therefore, agglomeration of fine ore is an indispensable control link for making full and rational use of lean ore. In addition, fine ore is produced...

AI Technical Summary

Problems solved by technology

[0005] Since the calcium carbonate component in the calcium chloride solution is easy to precipitate, the concentration of the calcium chloride mother liquor or the calcium chloride solution after the addition is reduced due to precipitation and affects the stability of the calcium chloride solution, which cannot meet the spraying process requirements, so that Calcium chloride not only cannot effectively reduce the low-temperature pulverization rate of sinter, but also increases the amount of spraying in order to increase the calcium chloride content of sinter, which will cause the increase of moisture in sinter and affect the screening of blast furnace. and the precipitated calcium chloride needs to be cleaned regularly, which not only causes waste of resources and environmental pollution, but also has high labor intensity and high cost of use and cleaning

For this reason, in the prior art, magnesium chloride or composite additives are also sprayed to achieve the purpose of suppressing the low-temperature pulverization rate of sinter, but magnesium chloride causes too much alkali metal to be brought into the blast furnace, which is not conducive to the maintenance of the blast furnace wall; some use Although the composite additive is effective in reducing the low-temperature pulverization rate of sinter, it is difficult to be popularized and applied on a large scale due to the high production cost

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