Method for producing stainless iron cakes by using blast furnace dust, stainless precipitator dust and iron scale

Abstract

The invention relates to a method for producing stainless iron cakes by using blast furnace dust, stainless precipitator dust and iron scale, comprising the following sequential steps: uniformly mixing the following raw materials by mass proportion: 30-45 parts of the blast furnace dust, 15-30 parts of the stainless precipitator dust, 40-50 parts of the iron scale and 2-6 parts of water glass+ADs- adding 4-8 parts of water into the mixed raw materials to uniformly stir+ADs- extruding and pressing cakes by a cake pressing machine+ADs- filling the pressed cakes in clay pots, 5-6 pressed cakes being in each pot+ADs- putting the pots in a tunnel kiln, increasing the temperature of the pressed cakes in the pots by coal gas to 600DEG C100 DEG C for insulation for 10-16h+ADs- reducing the pressed cakes in the pots for 30-44h at a reduction temperature of 1180 DEG C150 DEG C in the tunnel kiln+ADs- and conveying the pots out of the tunnel kiln and air-cooling the pots and pressed cakes to produce the stainless iron cakes. The method for producing stainless iron cakes by using blast furnace dust, stainless precipitator dust and iron scale has low cost and high efficiency.

Description

technical field [0001] The invention relates to a method for producing a stainless discus from blast furnace gas ash, stainless dust removal ash and iron scales. Background technique [0002] With the rapid development of my country's iron and steel industry in recent years, China has continuously ranked first in the world. However, the development of China's iron and steel enterprises is mostly at the cost of high energy consumption and high pollution, and produces a large amount of secondary resources, such as waste water, waste residue, waste, etc., which pollute the environment, especially the stainless steel dust produced by stainless steel production has a greater impact on the environment. big. If these secondary resources are not well utilized, it will not only waste a lot of resources, but also have a huge impact on the long-term development of human beings. Therefore, research on how to utilize these resources has become an urgent subject to be solved. For gener...

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Problems solved by technology

The existing method is to use the blast furnace gas ash, stainless dust removal dust, iron scale, etc. first through the cold solidification pellet method, and then through the blast furnace method to produce molten iron. However, due to the presence of chromium and other elements, the lining of the blast furnace is seriously eroded, which greatly reduces The life of the blast furnace, and because elements such as chromium are difficult to be reduced, the utilization factor of the blast furnace is only about 1 / 3 of the carbon molten iron produced by the blast furnace, and the production cost is very high