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Production process of expanded perlite

A technology of expanded perlite and production process, applied in the field of perlite production, can solve the problems of ore cracking dust volume, high pressure of expansion furnace, waste of raw materials, etc., and achieve the effect of high utilization rate, less waste and quality improvement

Inactive Publication Date: 2019-02-05
信阳市三元保温材料制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Widely used in construction, metallurgy, petroleum, machinery, light industry, hydropower, casting, medicine, food, agriculture, forestry and gardening and other departments; the current commonly used process is to crush perlite ore to form ore with a certain particle size, and heat it rapidly above 1000 °C The main disadvantage of this process method is that the sudden and sharp heating causes the ore to crack, resulting in a large amount of dust, resulting in excessive internal pressure of the expansion furnace, resulting in poor overall quality of perlite after overall expansion, and waste of raw materials The problem is more prominent

Method used

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  • Production process of expanded perlite
  • Production process of expanded perlite
  • Production process of expanded perlite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The step of expanded perlite production technique of the present invention is as follows:

[0027] A. Preheating: Put the pulverized raw ore through a hoist into the preheating drying furnace, and preheat and dry it for 9 minutes at a temperature of 545°C; among them, add raw materials, and before preheating and drying, the dust air in the preheating drying furnace is extracted and separated by the first cyclone separator, and the fine dust separated by the first cyclone separator is collected and solidified, and then added to the primary In the hoist, preheat and dry again; the gas separated by the first cyclone separator is discharged after dust removal by the bag pulse dust collector;

[0028] B. High-temperature expansion: the preheated and dried raw materials in step a enter the expansion furnace through the secondary elevator, and expand for 7s under the condition of 1000°C;

[0029] C. Cyclone separation: The perlite after high temperature expansion is separated...

Embodiment 2

[0032] The step of expanded perlite production technique of the present invention is as follows:

[0033] A. Preheating: Put the pulverized raw ore into the preheating drying furnace through a hoist, and preheat and dry it for 9 minutes at a temperature of 550°C; among them, add raw materials, and before preheating and drying, the dust air in the preheating drying furnace is extracted and separated by the first cyclone separator, and the fine dust separated by the first cyclone separator is collected and solidified, and then added to the primary In the hoist, preheat and dry again; the gas separated by the first cyclone separator is discharged after dust removal by the bag pulse dust collector;

[0034] B. High temperature expansion: the preheated and dried raw materials in step a enter the expansion furnace through the secondary elevator, and expand for 13s under the condition of 1080°C;

[0035] C. Cyclone separation: The perlite after high temperature expansion is separate...

Embodiment 3

[0038] The step of expanded perlite production technique of the present invention is as follows:

[0039]A. Preheating: Put the pulverized raw ore into the preheating drying furnace through a hoist, and preheat and dry it for 8 minutes at a temperature of 557 ° C; among them, add the raw ore before entering the preheating drying furnace raw materials, and before preheating and drying, the dust air in the preheating drying furnace is extracted and separated by the first cyclone separator, and the fine dust separated by the first cyclone separator is collected and solidified, and then added to the primary In the hoist, preheat and dry again; the gas separated by the first cyclone separator is discharged after dust removal by the bag pulse dust collector;

[0040] B. High-temperature expansion: the preheated and dried raw material in step a enters the expansion furnace through the secondary elevator, and expands for 17s under the condition of 980°C;

[0041] C. Cyclone separatio...

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Abstract

The invention discloses a production process of expanded perlite. The production process is characterized in that raw materials are preheated and dried after being pulverized, and then enter a high-temperature expansion furnace for high-temperature expansion, so that influences on the overall quality of the expanded perlite due to dust sharp increase and increased pressure in the expansion furnacecaused by rapid heating and expansion in the prior art are avoided; to increase the utilization rate of the overall raw materials and reduce waste, the perlite in the preheating and drying process and after expansion is separated through cyclones, and recycled dust materials are reused after curing, so that material waste is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of perlite production, in particular to a production process of expanded perlite. Background technique [0002] Expanded perlite is a kind of natural acidic vitreous volcanic lava, non-metallic minerals, including perlite, pitch rock and obsidian, the three are just different in crystal water content. Because its volume rapidly expands 4 to 30 times under the high temperature condition of 1000-1300 ℃, it is collectively called expanded perlite. Generally, the expansion ratio is required to be >7 to 10 times (obsidian >3 times, available), and the silica is about 70%. All are open pit mined. No beneficiation is needed, just crushing and screening; it is mainly used for filter, catalyst, molecular sieve and carrier of rubber, chemical fertilizer and pesticide. Widely used in construction, metallurgy, petroleum, machinery, light industry, hydropower, casting, medicine, food, agriculture, forestry and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/06C04B14/18
CPCC04B14/185C04B20/06
Inventor 杨克安
Owner 信阳市三元保温材料制造有限公司
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