A kind of calcium-based bentonite sodium modification method
A technology of calcium-based bentonite and calcium-based bentonite powder, which is applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of less distribution of sodium-based bentonite, complicated treatment process, and large equipment loss, etc. Less, good modification effect, less energy consumption
Active Publication Date: 2015-10-28
HOHAI UNIV
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Problems solved by technology
However, due to the small distribution of sodium-based bentonite, the price is much higher than that of calcium-based bentonite. Therefore, in addition to strengthening the search for sodium-based bentonite, it is also a good method to modify calcium-based bentonite to become sodium-based bentonite.
[0004] At present, the methods for sodium modification of calcium-based bentonite include suspension method, extrusion method, stacking method, wheel rolling method, double-screw method, supercritical treatment method and Raymond milling method, all of which have defects to a certain extent. Such as easy to cause secondary pollution, high energy consumption, large equipment, poor modification effect, large equipment loss, high cost and complicated treatment process after modification, etc.
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Calcium-based bentonite modification equipment, including a reactor (1), an atomization device (2), and a Venturi tube (3); the reactor (1) is provided with a powder inlet (4) on the side wall and an outlet at the bottom. feed port (5); the atomization device (2) includes a modifier tank (6) connected through a liquid inlet pipe (8) and an atomization nozzle (7), and the atomization nozzle (7) is set at the reaction In the device (1), a booster pump (9) is provided on the liquid inlet pipe (8); the Venturi tube (3) is connected to the powder inlet (4); wherein, the atomizing nozzle (7 ) with an aperture of 0.1 to 0.6 mm can achieve the purpose of the present invention.
[0022] The calcium-based bentonite sodium modification method uses an atomization method to atomize the modifier to atomize the calcium-based bentonite to modify the calcium-based bentonite to ...
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Abstract
The invention provides a sodium modifying method of calcium bentonite, comprises the following steps: grinding the calcium bentonite to obtain the calcium bentonite powder, atomizing a modifier solution, mixing and sufficiently contacting with the calcium bentonite powder mixed with hot air so that the calcium bentonite is modified by the modifier. The sodium modifying method of calcium bentonite adopts an atomizing spray technology so that the calcium bentonite powder can maximally contact with the modifier, the dosage of the modifier is reduced, the modifying speed is improved and the calcium bentonite powder is also completely modified, the utilization rate of the raw material is high, and the modifying effect is high.
Description
technical field [0001] The invention belongs to the field of engineering materials, and particularly relates to a method for modifying calcium-based bentonite into sodium-based bentonite mainly by using a semi-dry method. Background technique [0002] Bentonite waterproof blanket is mainly used as an anti-leakage material for artificial lake waterscapes, landfills, underground garages, roof gardens, pools, oil depots and chemical storage yards. It is mainly filled with high-expandability bentonite in a special Between the composite geotextile and the non-woven fabric, the bentonite in the pad forms a uniform and high-density gel-like waterproof layer when it meets water, which can effectively prevent water leakage. [0003] Commonly used bentonites include calcium-based bentonite and sodium-based bentonite. Since the distribution of calcium-based bentonite in the world is much wider than that of sodium-based bentonite, calcium-based bentonite is the most widely used bentonit...
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IPC IPC(8): C01B33/40
Inventor 祝建中朱志芳陈靓丁莹崔延松
Owner HOHAI UNIV