System and method for centralized classification treatment of steel metallurgic dust mud

Abstract

The invention relates to a system and a method for the centralized classification treatment of steel metallurgic dust mud, which belong to the technical fields of the comprehensive utilization and the innocent treatment of metallurgical industry solid waste. The system comprises an impurity removing system, a homogenizing system, a granulating system and a sintering proportioning system, wherein an outlet of the impurity removing system is connected with an inlet of the homogenizing system, an outlet of the homogenizing system is connected with an inlet of the granulating system, and an outlet of the granulating system is connected with an inlet of the sintering proportioning system; the impurities in high-impurity materials are firstly removed through the impurity removing system, the materials and the rest ferruginous dust mud together enter a mixing system for homogenization treatment, the homogenized materials enter the granulating system for granulation treatment, and the granular materials made by the granulating system enter the sintering proportioning system and are used as sintering raw materials. The system has the advantages of simple and practical technology, large processing capacity, cleanness, environmental protection and lower initial investment and running cost, and fully expresses the ideas of cleaner production and cyclic economy in iron and steel industry.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization and harmless treatment of solid waste in the metallurgical industry, and specifically provides a system and method for centralized classification and treatment of iron and steel metallurgical dust and sludge, and relates to a method and equipment system for centralized and classified treatment of metallurgical dust and sludge, especially The invention relates to a method and equipment system for preparing sintered pellets from all iron-containing dust and sludge in iron and steel metallurgy. Background technique [0002] At present, the continuous and rapid development of the iron and steel industry is severely restricted by three major factors: resources, energy and the environment. Only by developing a circular economy can we truly solve the bottleneck problem that restricts the development of iron and steel. Efficient recycling of iron and steel metallurgical dust and the real...

AI Technical Summary

Problems solved by technology

The feature of this invention is to fully recycle iron-containing waste materials, and also consider the removal of harmful elements, but because it needs to be processed into cold-consolidated pellets and sent to the shaft furnace for melting, there are relatively high requirements for the cold and hot strength of the pellets, and the amount of additives Many, the maintenance of cold-consolidated products occupies a large area, the process is complicated, the energy consumption is large, and the cost is high, so it is difficult to be popularized and applied

[0009] In addition, although the rotary hearth furnace and smelting reduction technology being developed by foreign iron and steel enterprises have a relatively thorough function of removing impurities and recovering metallic iron resources, their investment and operation costs are high, and the sponge iron products produced cannot be reused due to the high content of impurities. The steel system can only reuse the ironmaking system, and the product economy is poor, so it is currently difficult to apply to the treatment of all iron-containing dust and sludge

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