Expanded perlite production process and equipment

Abstract

The expanded perlite production process comprises material treatment and air duct dust removal, and the material treatment comprises the following steps that feeding is conducted, specifically, materials enter a drying furnace through a feeding bin; materials are preliminarily preheated in the drying furnace and conveyed to one side. The materials subjected to preliminary preheating enter a lifting machine and are conveyed into an expansion furnace through the lifting machine; the materials are expanded twice in the expansion furnace; the materials subjected to secondary expansion are conveyed into the drying furnace; and sixthly, the materials dried through the drying furnace are conveyed into a finished product bin. According to the present invention, the initial material is preheated by using the heat during the drying of the expanded material so as to reduce the energy loss, and the secondary expansion technology is innovatively adopted, such that the technology belongs to the pioneering technology in the whole industry, such that the material melting can be well achieved, the material corner angle can be well eliminated, the energy loss can be well reduced, and the low-nitrogen technology can be well utilized; and the purposes of energy conservation and emission reduction can be well achieved.

Description

technical field [0001] The invention relates to the technical field of perlite production equipment, in particular to an expanded perlite production process and equipment. Background technique [0002] Expanded perlite is a natural acid vitreous volcanic lava, non-metallic minerals, including perlite, turpentine and obsidian, the three only have different crystal water content. Because its volume rapidly expands by 4 to 30 times under high temperature conditions of 1000-1300 °C, it is collectively referred to as expanded perlite. Expanded perlite can be used as filter, catalyst, molecular sieve and carrier of rubber, fertilizer and pesticide. Widely used in construction, metallurgy, petroleum, machinery, light industry, hydropower, foundry, medicine, food, agriculture, forestry and horticulture and other departments. [0003] In the production process of the current expansive rock, the perlite usually undergoes a single expansion during the production process. At this time...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a production process and equipment for expanded perlite, which effectively solves the problems of large energy consumption in the production of perlite and insufficient primary expansion, which causes inconvenient processing in the later stage

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