Ultrasonic centrifugal purification and sodium-based treatment method for low-grade bentonite

A technology of centrifugal purification and bentonite, which is applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems that bentonite contains other impurity minerals and is difficult to meet the purity requirements, and achieves good purification effect, enhanced electrostatic repulsion, and improved The effect of dispersion

Inactive Publication Date: 2018-11-30
WUHU PENGLEI NEW MATERIAL
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Problems solved by technology

my country is rich in bentonite resources, but the naturally produced bentonite contains other impurity minerals, which is difficult to meet the purity requirements in various application fields

Method used

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Embodiment Construction

[0016] An ultrasonic centrifugal purification and sodium-based method of low-grade bentonite, comprising the following specific steps:

[0017] (1) Mix an appropriate amount of bentonite with 0.5% sodium polyacrylate of bentonite quality, add deionized water to achieve a 5% mass fraction of pulp, stir evenly with a high-speed homogeneous disperser at a speed of 2000 rpm, and then statically Place, remove the lower layer of precipitation, and obtain the upper layer suspension for use;

[0018] (2) Put the upper layer suspension obtained in step (1) into a container, put the container into an ultrasonic oscillator, and take out the container after ultrasonic treatment at a frequency of 40kHz for 10 minutes, remove the flocculated precipitate at the bottom, and use a high-speed Centrifuge the centrifuge at a speed of 1200 rpm for 10 minutes, remove the impurities at the bottom, take the intermediate suspension, filter and dry it, and obtain purified bentonite;

[0019] (3) Add 5...

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Abstract

The invention discloses an ultrasonic centrifugal purification and sodium-based treatment method for low-grade bentonite. According to the present invention, low-grade bentonite is purified by using an ultrasonic centrifugal separation method, wherein an appropriate amount of sodium polyacrylate as a dispersing agent and water are added to bentonite to form a mineral slurry with high negative charge density so as to greatly increase the dispersion degree of the mineral slurry, then the bentonite particles are ultrasonically broken to expose the fine particles contained in the mineral, quartz particles with the slightly high density can be centrifuged to the wall of a cup after centrifugal force is applied, montmorillonite is separated from impurities by controlling the rotation speed, andthe impurities with the slightly high density are separated by controlling the centrifugal force so as to finally achieve the good purification effect; and finally according to the ion exchange principle, the purified bentonite is modified by using soda ash as a modifier through a dry mechanical ball milling activation method. Compared to the extrusion method used in the prior art, the process ofthe present invention is simple and easy to control, and can achieve the sodium-based bentonite.

Description

technical field [0001] The invention relates to the technical field of bentonite, in particular to an ultrasonic centrifugal purification and sodium-based method of low-grade bentonite. Background technique [0002] Bentonite is a clay mineral mainly composed of montmorillonite. The special structure of montmorillonite makes it have many excellent physical and chemical properties and has been applied in many fields. my country is rich in bentonite resources, but the naturally produced bentonite contains other impurity minerals, which is difficult to meet the purity requirements in various application fields. Since the content of montmorillonite in naturally produced bentonite is mostly about 50%-80%, it needs to be purified and removed before bentonite is processed. At present, the purification methods of bentonite are mainly divided into two categories: dry purification and wet purification. Dry purification is mainly suitable for bentonite ore with montmorillonite conten...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 王浩
Owner WUHU PENGLEI NEW MATERIAL
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