How to realize the comprehensive utilization of converter slag resources

To achieve the goal of "zero discharge" of converter slag and improve the comprehensive utilization rate of resources. According to the physical and chemical properties of converter slag, combined with the current application industry, it is necessary to develop a set of recycling production process, which can promote recovery and improve economic benefits. The comprehensive utilization of converter slag resources is designed to many fields. For example: used in sintering and smelting flux.At present, under the practical conditions of many fields of industrial application of converter steel slag, we will organically link with the physical and chemical properties of steel slag, and develop a matching production process of comprehensive utilization of converter steel slag recycling resources, which plays an important role in improving the comprehensive utilization rate of steel slag and achieving the goal of zero emission in iron and steel enterprises. The process of zero emission can be divided into three steps. First, the molten steel is heated and stewed, then the metal content of Fe is removed by magnetic separation, and then the oxide is comprehensively used to grind the ball into different thicknesses for building materials manufacturing.

The technology of steel slag stewing

The steel slag which is just solidified and still in high temperature is introduced into the braising furnace, or the liquid steel slag is directly introduced into the braising furnace. By using the residual heat contained in the steel slag itself and the automatic water spray process on the braising tank cover, a large amount of free calcium oxide in the steel slag is shrunk unevenly when encountering water in the micro pressure steam, and the volume is expanded to 23-87%, so that the sodium hydroxide produced by the large steel slag can self dissolve In addition, 60-80% of the steel slag with good granulation effect can reach less than 20 mm. Because of the elimination of free calcium oxide, the stability is improved under the condition that the slag phase is basically unchanged, and it is also convenient for the comprehensive utilization of the slag powder in the later stage. Then the excavator is used to excavate the material and enter the next crushing magnetic separation process. This process is characterized by the use of any kind and fluidity of steel slag, not only saving energy, but also improving the stability of steel slag, avoiding the later use of steel slag powder, which is also an important part of realizing zero discharge of steel slag..

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