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Wet grinding system for nonmetal mineral powder and grinding method thereof

A non-metallic mineral powder, wet grinding technology, applied in the field of mineral crushing, can solve the problems of complex operation, large particle size, long production process, etc., and achieve the effect of high activation degree, narrow particle size distribution and high output

Active Publication Date: 2012-07-04
内蒙古超牌新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a non-metallic mineral powder wet grinding system and its grinding method to solve the technical problems of long production process, complicated operation and large particle size in the prior art

Method used

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  • Wet grinding system for nonmetal mineral powder and grinding method thereof
  • Wet grinding system for nonmetal mineral powder and grinding method thereof
  • Wet grinding system for nonmetal mineral powder and grinding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Mix 5 tons of 325-mesh brucite, 5 tons of water and 40 kg of polyacrylate dispersant (9400), mix well, and pump it into a CYM-3000 blade-type stirring mill. The grinding medium uses ceramic beads of 3mm, 2mm and 1mm , the ratio of ceramic beads with a diameter of 3mm: 2mm: 1mm is 1: 2: 1, and the volume of the added grinding medium is 70% of the cylinder. The output is 900 kg per hour (calculated as dry powder), and the fineness has been tested to reach 7000 mesh. Filter with a plate and frame filter press, and the water content of the filter cake is 29.8%. Add the filter cake to the powerful dryer with a screw feeder, control the air inlet temperature to 320°C, the outlet to 180°C, and the moisture content of the dry powder to be 0.11%. The modifying agent is stearic acid, and the dosage is 1.5% of the mass of brucite. Put the dry powder from the hopper into the feed hopper of the continuous modification machine SLG-300 for modification. Modification conditions: mod...

Embodiment 2

[0056] Mix 7 tons of 200-mesh barite, 3 tons of water and 42 kg of sodium hexametaphosphate, mix well, and pump it into the CYM-3000 stirring mill. The grinding medium uses 2mm, 1mm and 0.5mm ceramic beads, and the ratio is 1:1: 1. The volume of the added grinding medium is 60% of the barrel. The output is 800 kg per hour (calculated as dry powder), and the fineness has been tested to reach 10,000 mesh, and more than 90% of which are less than 2 microns. Directly pump the slurry into the powerful dryer, control the air inlet temperature to 310°C, the outlet to 180°C, and the moisture content of the dry powder to be 0.19%. The modifying agent is aluminate, and the dosage is 0.3% of the mass of barite. Put the dry powder from the hopper into the feed hopper of the continuous modification machine SLG-200D for modification. Modification conditions: modification at 120° C. for 5 minutes. The degree of activation after modification is 99%, without caking.

Embodiment 3

[0058] Mix 8 tons of 200-mesh barite, 2 tons of water and 42 kg of sodium hexametaphosphate, mix well, and pump it into the CYM-3000 stirring mill. The grinding medium uses 10mm, 1mm and 0.1mm ceramic beads, and the ratio is 1:1: 2. The volume of the added grinding medium is 80% of the barrel. The output is 800 kg per hour (calculated as dry powder), and the fineness has been tested to reach 10,000 mesh, and more than 90% of which are less than 2 microns. Directly pump the slurry into the powerful dryer, control the air inlet temperature to 310°C, the outlet to 180°C, and the moisture content of the dry powder to be 0.19%. The modifying agent is titanate, and the dosage is 2.5% of the mass of barite. Put the dry powder from the hopper into the feed hopper of the continuous modification machine GMZ70 for modification. Modification conditions: modification at 100°C for 5 minutes. The degree of activation after modification is 97%, without caking.

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Abstract

The invention provides a wet grinding system for nonmetal mineral powder and a grinding method thereof. The wet grinding system for nonmetal mineral powder provided by the invention comprises a blade type stirring grinder, a continuous modifying machine and a drying machine. After the nonmetal mineral powder is prepared into first slurry, the first slurry is ground in the blade type stirring grinder and then enters into the drying machine. After the first slurry is dried in the drying machine, the first slurry enters into the continuous modifying machine so as to be modified. An obtained product has a fine grain size; the grain size of brucite can reach 8000 meshes; the grain size of barite can reach 10000 meshes; the grain size distribution is narrow; the cycling grinding is unnecessary during a production process; a plurality of grinding devices need not be serially connected; the energy consumption is low; and the excessive grinding phenomenon of the powder is avoided.

Description

technical field [0001] The invention relates to the field of mineral crushing, and in particular, relates to a non-metallic mineral powder wet grinding system. Another aspect of the invention also provides a grinding method for wet grinding products. Background technique [0002] Ores such as brucite, barite, quartz and sericite have a particle size of 325 mesh after primary crushing. In order to further reduce the particle size, in the prior art, a dry jet mill is mainly used for pulverization. In the pulverizer, the energy of high-speed air flow or superheated steam causes the slurry particles to collide, collide, and rub against each other to achieve ultra-fine pulverization or depolymerization. During the pulverization process, as the particle size of the slurry decreases, its surface energy increases, and the particles are easy to agglomerate or adhere to the equipment wall, forming a powder buffer layer, so that the energy cannot be concentrated on a single particle d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/16B02C23/00
Inventor 冯建明陈建文林炼杨述明
Owner 内蒙古超牌新材料股份有限公司
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