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Low-calcium calcined black talc production equipment, low-calcium calcined black talc and preparation method thereof

A technology for calcining black talc and production equipment, applied in magnesium silicate, silicate and other directions, can solve the problems of high production cost and high calcium oxide content, and achieve the effects of saving processing cost, reducing environmental pollution and wide application range

Active Publication Date: 2020-03-13
内蒙古超牌新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a low-calcium calcined black talc production equipment, low-calcium calcined black talc and a preparation method thereof, in order to solve the technical problems of high calcium oxide content and high production cost in the black talc prepared in the prior art

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  • Low-calcium calcined black talc production equipment, low-calcium calcined black talc and preparation method thereof
  • Low-calcium calcined black talc production equipment, low-calcium calcined black talc and preparation method thereof

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preparation example Construction

[0032] According to another aspect of the present invention, a preparation method of low-calcium calcined black talc is also provided, comprising the following steps: (1) mixing high-calcium black talc with water to form a black talc slurry; (2) mixing the black talc material The reaction gas is introduced into the slurry to reduce the calcium content in the solid material, and after the reaction is filtered, the solid material is obtained; (3) the solid material is dried, and the formed low-temperature tail gas is used as the reaction gas of step (2); The dry solid material is calcined, and low calcium calcined black talc is obtained after calcination; the high temperature flue gas generated by the calcination is used as a drying heat source in step (3) to dry the solid material; after the high temperature flue gas is dried to form a low temperature exhaust gas, the low temperature exhaust gas is used as a step The reaction gas of (2) reacts with the black talc slurry. In the...

Embodiment 1

[0045] Chemical composition of black talc ore in a certain place in Shandong: SiO 2 , 57.83%; MgO, 30.75%; CaO, 3.02%. Take 1kg of this ore, add 4kg of water to form black talc slurry, and feed 600m of reaction gas 3 / h, fully stir the reaction, control the pH value to 6, filter and wash the solid material after 3 hours of reaction, dry the solid material, and calcinate at 1200 °C to obtain low-calcium calcined black talc.

[0046] The high-temperature flue gas generated by the above calcination is used for drying the solid material, and the low-temperature exhaust gas generated after the above-mentioned solid drying is used for the reaction gas of the black talc slurry.

[0047] The chemical composition of low calcium calcined black talc is as follows: SiO 2 , 62.38%; MgO, 31.36%; CaO, 0.17%. SO in exhaust 2 Concentration from 450mg / m 3 down to 45mg / m 3 , NO 2 From 180mg / m 3 down to 145mg / m 3 . The above-mentioned exhaust gas components meet the emission standards. ...

Embodiment 2

[0049] Chemical composition of black talc ore in a place in Jiangxi: SiO 2 , 59.13%; MgO, 24.17%; CaO, 6.78%. Take 1kg of this ore, add 4kg of water to form black talc slurry, and feed 2000m of reaction gas 3 / h, fully stir the reaction, control the pH value to 4, filter and wash the solid material after the reaction for 3 hours, dry the solid material, and calcinate at 1200 °C to obtain low-calcium calcined black talc.

[0050] The high-temperature flue gas generated by the above calcination is used for drying the solid material, and the low-temperature exhaust gas generated after the above-mentioned solid drying is used for the reaction gas of the black talc slurry.

[0051] The chemical composition of low calcium calcined black talc is as follows: SiO 2 , 62.57%; MgO, 25.17%; CaO, 0.86%. SO in exhaust 2 Concentration from 560mg / m 3 down to 48mg / m 3 , NO 2 From 170mg / m 3 down to 141mg / m 3 . The above-mentioned exhaust gas components meet the emission standards.

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Abstract

The invention discloses low calcium calcined black talc production equipment, low calcium calcined black talc, and a preparation method thereof. The low calcium calcined black talc production equipment comprises a black talc slurry reaction device, a solid liquid separation device at the output terminal of the black talc slurry reaction device, a drying device at a solid output terminal of the solid liquid separation device, and a calcining device at a material output terminal of the drying device; a tail gas output terminal of the drying device is communicated with the internal part of the black talc slurry reaction device; a high temperature flue gas output terminal of the calcining device is communicated with the internal part of the drying device; the calcining device is provided witha calcined product outlet terminal. The low calcium calcined black talc production equipment is capable of realizing recycling of released gas, and low-calcium calcined products with calcium oxide content lower than 1% can be obtained without adding other chemical components.

Description

technical field [0001] The invention relates to the technical field of preparation of calcined black talc, in particular, to a low-calcium calcined black talc production equipment. In addition, the present invention also relates to a low-calcium calcined black talc and a preparation method thereof. Background technique [0002] Talc in nature includes white talc and black talc, and the molecular formula of talc is 3MgO 4SiO 2 ·H 2 O. Black talc is a general term for black talc, gray-black talc, etc. The organic matter in it is the main reason for its blackening. Due to the low whiteness of black talc, its application field is limited. At present, calcination is generally used to increase the whiteness. The calcined black talc has a wide range of uses, such as papermaking, coatings, plastics and ceramics. Among them, high-grade ceramics require higher calcium oxide content in black talc, generally requiring less than 2% calcium oxide. Calcium oxide in black talc often e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/22
CPCC01B33/22C01P2006/60
Inventor 陈建文冯建明林炼王宇轩刘世明
Owner 内蒙古超牌新材料股份有限公司
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