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Attapulgite refining method

A technology of attapulgite and refining method, applied in the direction of magnesium silicate, silicate, etc., can solve the problems of large washing wastewater, environmental safety hazards, etc., and achieve the effect of improving utilization rate, simple process, and convenient industrial production

Pending Publication Date: 2021-09-07
甘肃萃华科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also uses 4% dilute hydrochloric acid for acid activation treatment, which produces a large amount of washing wastewater and poses a safety hazard to the environment.

Method used

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  • Attapulgite refining method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Gansu Baiyin attapulgite raw ore (low-grade attapulgite raw ore, attapulgite content of 20%) is ground with a ball mill and passed through a 200-mesh sieve to obtain low-grade attapulgite raw ore powder. Prepare sodium pyrophosphate solution, add the low-grade attapulgite raw ore powder to the sodium pyrophosphate solution according to the solid-to-liquid ratio of 1% (the mass ratio of low-grade attapulgite raw ore powder to sodium pyrophosphate solution is 1:99), wherein The mass of sodium pyrophosphate is 1% of the mass of attapulgite raw ore powder. A large-scale high-speed disperser of the rotary vane type or an oscillating type is used to mechanically disperse and make pulp at a speed of 500 rpm (rev / min) for 0.5 h (hour) to obtain attapulgite slurry. After the pulping was completed, the attapulgite slurry was treated at a shear rate of 4000 rpm for 10 min (minutes) using a micro-interval strong shear reactor with a micro-interval gap of 0.1 mm. Then apply an exte...

Embodiment 2

[0026]Gansu Baiyin attapulgite raw ore (the attapulgite content is 10%) is ground with a ball mill and passed through a 200-mesh sieve to obtain low-grade attapulgite raw ore powder. Prepare sodium orthophosphate solution, add the low-grade attapulgite raw ore powder into the sodium orthophosphate solution according to 10% solid-to-liquid ratio (the mass ratio of low-grade attapulgite raw ore powder to sodium orthophosphate solution is 1:9), wherein The mass of sodium orthophosphate is 5% of the mass of attapulgite raw ore powder. A large-scale high-speed disperser of the rotary vane type or an oscillating type is used to mechanically disperse the slurry at a speed of 1000 rpm for 1 hour to obtain attapulgite slurry; Treat the attapulgite slurry for 30 minutes at a cutting speed of 3000r / min. Afterwards, an external field ultrasonic wave with an ultrasonic power of 500 W was applied to carry out ultrasonic treatment on the slurry for 1 h. After the attapulgite slurry was all...

Embodiment 3

[0028] Gansu Baiyin attapulgite raw ore (attapulgite content of 35%) is ground with a ball mill and passed through a 200-mesh sieve to obtain low-grade attapulgite raw ore powder. Prepare sodium polymetaphosphate solution, add the low-grade attapulgite raw ore powder to the polymetaphosphate solution according to the solid-to-liquid ratio of 30% (the mass ratio of low-grade attapulgite raw ore powder to sodium polymetaphosphate solution is 3:7) Among them, the mass of sodium polymetaphosphate is 9% of the mass of attapulgite raw ore powder. Attapulgite slurry was obtained by mechanically dispersing and pulping for 2 hours with a large-scale high-speed disperser of rotary vane type or oscillating type at a speed of 3000 rpm. After the pulping is completed, the attapulgite pulp is processed at a shear rate of 1000 r / min for 20 min using a micro-interval strong shear reactor with a micro-interval gap of 0.5 mm. Afterwards, an external field ultrasonic wave with an ultrasonic pow...

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Abstract

The invention discloses an attapulgite refining method which comprises the following steps: grinding low-grade attapulgite raw ore by using a ball mill, and sieving by using a 200-mesh sieve to obtain low-grade attapulgite raw ore powder; preparing a dispersing agent solution, adding the low-grade attapulgite raw ore powder into the prepared dispersing agent solution, and mechanically dispersing to obtain attapulgite slurry; treating the attapulgite slurry by using a micro-interval strong shear reactor; applying external field ultrasonic waves to perform ultrasonic treatment on the attapulgite slurry; standing the attapulgite slurry, and removing impurities at the bottom of the attapulgite slurry; removing impurities on the lower layer of the attapulgite again by using a graded centrifugation technology to obtain centrifugally refined attapulgite; and carrying out drying treatment on the centrifugally refined attapulgite, and grinding the centrifugally refined attapulgite to 200 meshes to obtain the refined attapulgite powder. The method has the characteristics of simple process, environmental protection and high efficiency, and the attapulgite refined by the method is large in specific surface area and high in purity.

Description

technical field [0001] The invention belongs to the technical field of attapulgite refining, in particular to a method for refining low-grade attapulgite. Background technique [0002] Attapulgite in Gansu Province is a rare and important non-metallic mineral in the world, with the chemical formula Mg 5 Si 8 o 20 (OH) 2 (OH 2 ) 4 4H 2 O, the diameter of a single fiber crystal is about 20-70nm, and the length is about 0.5-5μm, which is a natural nanomaterial. It has excellent adsorption, colloid, carrier and toughening and reinforcing properties. Because of its unique structure, it can be used in many fields such as agriculture, environmental protection, chemical industry, building materials, papermaking, medicine, food and national defense. The attapulgite in Gansu Province is formed by marine sedimentary rocks. It has a unique rod crystal morphology and pore structure, and contains 14 kinds of trace elements. It is located in Baiyin City and Zhangye City. It has ri...

Claims

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Application Information

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IPC IPC(8): C01B33/22
CPCC01B33/22C01P2006/12C01P2006/80C01P2006/40
Inventor 冯拥军王兴鹏陈馨
Owner 甘肃萃华科技有限公司
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