Afterheat drying system for raw mineral material

Abstract

The invention relates to an afterheat drying system for raw mineral materials. The system comprises a feed inlet system, a drying machine, a thermal source equipment system, a waste gas discharge system and a feed discharge system, wherein the drying machine adopts afterheat steam as a drying medium, and the entire drying system has the characteristics of simplicity, neatness, no pollution, etc. The drying system solves the problem of the traditional drying technique that high temperature smoke gas generated by burning coals or fuel is used as a thermal source, which results in poor operating environment, high energy consumption and production cost, large volume of discharged tail gas and powder, complex dust collection and purification system, serious environmental pollution, etc. The drying system can be applied to the metallurgy, the chemical engineering and other industries having the requirement of limiting the liquid water content of raw materials, and can also be used for drying the raw materials or the semifinished products of the medicine industry, the food industry and other industries having the requirement of limiting the liquid water content of the semifinished products after rough treatment.

Description

technical field [0001] The invention relates to a waste heat drying system for mineral raw materials, and belongs to the technical field of environmental protection and energy saving transformation in the smelting and chemical industry. Background technique [0002] Sulfur concentrate roasting raw materials generally have a high moisture content (water content 10-30%), so they need to be dried and dehydrated before being processed in the roaster. Traditionally, the traditional rotary kiln drying technology has been used to dry mineral raw materials. The drying medium used in the rotary drying kiln drying technology is high-temperature flue gas, and the heat exchange is carried out through direct contact between high-temperature flue gas and wet raw materials, so as to achieve the purpose of dehydration and drying of raw materials. [0003] Because the use of rotary drying kiln technology mainly has a large amount of flue gas dust, and a fuel combustion system is required in...

AI Technical Summary

Problems solved by technology

[0003] Because the use of rotary drying kiln technology mainly has a large amount of flue gas dust, and a fuel combustion system is required in front of the kiln, and a dust removal and purification system is required after the kiln, resulting in a large and complex drying system, and the dehydration of raw materials is difficult to control, dust and flue gas Serious pollution to the environment

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