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Process and device for whitening calcined black talc

A technology for calcining black talc, which is applied in magnesium silicate, silicate and other directions, can solve problems such as backward equipment and environmental pollution, and achieve the effects of improving production capacity, reducing production costs, and shortening calcination time.

Inactive Publication Date: 2013-10-09
TIANJIN CEMENT IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process and the equipment used are relatively backward, and the SO produced during the calcination of black talc 2 The gas is discharged directly without any treatment measures, causing great pollution to the environment

Method used

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  • Process and device for whitening calcined black talc
  • Process and device for whitening calcined black talc
  • Process and device for whitening calcined black talc

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Embodiment Construction

[0028] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0029] The invention discloses a process for whitening calcined black talc. Black talc ore is used as a raw material, and sequentially undergoes ore dressing, crushing, grinding, rotary kiln calcination and cooler cooling to obtain granular and massive whiteness greater than or equal to 90. Calcined black talc products, wherein the firing zone temperature in the rotary kiln calcination process is 800-1400°C, and the residence time of the material in the kiln is 30-90 minutes.

[0030] In this embodiment, the following steps are also included, crushing, dispersing and grading and removing iron to the cooled granular and massive calcined black talc products to obtain powdered calcined black talc products with a whiteness greater than or equal to...

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Abstract

The invention discloses a process for whitening calcined black talc. Black talc ore is taken as a raw material and is sequentially subjected to mineral separation, crushing, grinding, calcining in a rotary kiln and cooling by a cooling machine, and then granular and blocky calcined black talc products with whiteness of more than or equal to 90 are obtained, wherein the temperature of a burning zone in the calcining procedure in the rotary kiln is 800-1400 DEG C, and the standing time of the raw material in the kiln is 30-90 min. The invention also discloses a device adopting the method. According to the process and the device, a preheater system is adopted for preheating, and a rotary kin calcining process is adopted, so that the calcining time is greatly shortened, and the production capacity is remarkably improved; combustion and heat release of organic matters in black talc are fully considered; the production cost is lowered due to no addition of a whitening agent; dry-method grinding is adopted, and the process is advanced; compared with a process that the black talc is calcined by an annular kiln, the process disclosed by the invention has the advantages that emitted waste gas can be treated to reach the national environmental requirement, the automation degree is high, and parameters are measureable and controllable.

Description

technical field [0001] The invention relates to a process and a device for whitening black talc, in particular to a process and a device for whitening calcined black talc. Background technique [0002] my country's black talc mineral resources are quite rich. The latest survey results of Jiangxi Provincial Department of Land and Resources in 2009 show that in Guangfeng County, Shangrao City, Jiangxi Province, the black talc ore body extends intermittently for 20 kilometers, with reserves of more than 1 billion tons, ranking first in the world. , while the mining volume is less than 10 million tons. The black talc industry base in Guangfeng County, Jiangxi Province was recently approved as a provincial-level industrial base in Jiangxi Province. Black talc and new energy industries were also included in the "Twelfth Five-Year Plan" development plan of Jiangxi Province. Whitened black talc is a rare high-quality raw material with huge economic value, which can greatly alleviate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/22C04B35/20C04B35/626
Inventor 俞为民彭学平李小燕陈昌华刘继开朱金波陈志辉武晓萍马娇媚
Owner TIANJIN CEMENT IND DESIGN & RES INST
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