CN103979559B - Bentonite after acidifying - Google Patents

Bentonite after acidifying Download PDF

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Publication number
CN103979559B
CN103979559B CN201410237844.8A CN201410237844A CN103979559B CN 103979559 B CN103979559 B CN 103979559B CN 201410237844 A CN201410237844 A CN 201410237844A CN 103979559 B CN103979559 B CN 103979559B
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bentonite
acidifying
batching
weathering
sulfuric acid
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CN103979559A (en
Inventor
黄飞翔
黄允金
陈丽萍
许盛英
许庆华
蒋文兰
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Jiangsu Shiao Nonmetallic Application Technology Co., Ltd.
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许盛英
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Abstract

The invention discloses the bentonite after a kind of acidifying, the main points of its technical scheme are that the bentonite batching after acidifying is made up of bentonite, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate. Bentonitic production method after acidifying: by abrasive dust in the bentonite batching input grinding machine after acidifying, the powder after abrasive dust is the bentonite after acidifying. Take first acidifying to carry out again compounding ingredient, can avoid sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate generation chemical reaction, give full play to raw-material characteristic separately in batching, guarantee the bentonite inherent quality after acidifying. Bentonite after acidifying not only has good absorption property, high-temperature stability and lubricity, and water absorption rate, colloid index, plasticity, expansion multiple, colloid viscosity and thixotropy are also greatly improved. Bentonite after acidifying is applicable to produce the product in the fields such as coating, aviation, metallurgy, chemical fibre, oil and fire-fighting.

Description

Bentonite after acidifying
Technical field
The present invention relates to acidification, be specifically related to the bentonite after a kind of acidifying.
Background technology
The bentonite resource of China is very abundant, and most of bentonite ore is taking calcium-base bentonite as main, and the low calcium-base bentonite of grade occupies the majority; In order to improve the performance of calcium-base bentonite, need to carry out acidified modified processing to calcium-base bentonite. Routine is carried out the method for the acidified modified processing of calcium-base bentonite, is sulfuric acid is directly added in raw ore of calcium base bentonite acidifying post-drying and abrasive dust.
In bentonite mining area, usage mining machine carries out mechanical mining bentonite raw ore, excavate out be a kind of compact massive bentonite raw ore, the volume of bentonite raw ore is larger, can not be directly used in acidification, normal employing pulverizer is broken for tiny particle and carries out acidification, is easy to destroy bentonitic crystal structure.
After acidification, do not carry out follow-up complementary modification, can not improve the quality of bentonite product comprehensively.
Summary of the invention
The object of the invention is to overcome weak point in prior art, the bentonite after a kind of acidifying is provided.
Bentonite batching after acidifying is made up of bentonite, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate.
Bentonitic production method after acidifying: by abrasive dust in the bentonite batching input grinding machine after acidifying, the powder after abrasive dust is the bentonite after acidifying.
Atlapulgite be with bentonite be raw material, through inorganic acidification, then through water rinse, the dry adsorbent of making, absorption property is good, but the water absorption rate of atlapulgite, colloid index, expansion multiple and colloidal property are very poor, the also easy moisture absorption in air, placed and can reduce for a long time absorption property.
It is 98% the concentrated sulfuric acid that sulfuric acid is selected concentration.
Quick dissolved sodium silicate is white granular material, can be dissolved in fast water, has that cohesive force is strong, intensity is higher, acid resistance, good heat resistance, the feature of alkali resistance and poor water resistance.
Polyethenol series white solid, that external form is divided is cotton-shaped, graininess, Powdered three kinds; Nonpoisonous and tasteless, graininess can be dissolved in 80--90 DEG C of water, pulverously after other powders pre-dispersed, can dissolve at normal temperatures. There is good viscosity, polymerism, caking property and water-retaining property.
Hydroxypropyl methylcellulose has thickening capabilities, salt discharge, pH stability, water-retaining property, dimensional stability, good film forming and the feature such as resistance to enzyme, dispersiveness and caking property widely.
Sodium carbonate has the general character and the heat endurance of salt, soluble in water, and its aqueous solution is alkalescence, in the present invention for adjusting the bentonite pH value after acidifying.
The present invention is achieved by following technical proposals:
1, the batching of the bentonite after acidifying is made up of following component by weight percentage: bentonite semi-finished product 90~98%, quick dissolved sodium silicate 0.1~5%, polyvinyl alcohol 0.1~5%, hydroxypropyl methylcellulose 0.01~3% and sodium carbonate 0~3% after acidifying.
2, the bentonitic production method after acidifying: by abrasive dust in the bentonite batching input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the bentonite finished product after acidifying.
3, the half-finished production method of the bentonite after acidifying: in the mixer (1) first bentonite after weathering input having been turned round, then dilute sulfuric acid is slowly added and carries out acidification in the bentonite after weathering; (2) by the bentonite after acidification, push as bentonite tablet thickness≤3 millimeter of bentonite tablet by twin rollers; (3) bentonite tablet is transported to roasting in swinging drying oven, roasting time is 1~3 hour, sintering temperature is controlled at 250~350 DEG C, bentonite tablet water content≤5% after roasting, bentonite tablet after roasting is the bentonite semi-finished product after acidifying, and PCm is weight percentage.
4, the batching of bentonite tablet is made up of following component by weight percentage: the bentonite 60~85% after weathering and dilute sulfuric acid 15~40%.
5, the batching of dilute sulfuric acid is made up of following component by weight percentage: the concentrated sulfuric acid 1~5% that concentration is 98%, and water 95~99%, the concentrated sulfuric acid percentage that concentration is 98% is weight percentage.
6, bentonite raw ore need to be through two time weathering more than winter, bentonite the weathering that is fine particle from the raw ore disintegration of large block compact, pick obvious visible barren rock piece, string and other earth impurity, bentonite clay particle fineness≤5 millimeter after weathering.
Bentonitic production method after acidifying takes first acidifying to carry out compounding ingredient again, can avoid sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate generation chemical reaction, give full play to raw-material characteristic separately in batching, and obtain complementation, guarantee the bentonite inherent quality after acidifying.
According to the needs of product quality, adopt sodium carbonate to adjust the bentonite pH value after acidifying, method is simple.
The present invention makes full use of solar energy, wind and rain alternately and with the passage of time, promotes the weathering effect to bentonite raw ore, improves the disintegration effect of bentonite raw ore, accelerates the dispersion of bentonite raw ore.
Bentonite after acidifying not only has good absorption property, high-temperature stability and lubricity, and water absorption rate, colloid index, plasticity, expansion multiple, colloid viscosity and thixotropy are also greatly improved.
Bentonite after acidifying is applicable to produce the product in the fields such as coating, aviation, metallurgy, chemical fibre, oil and fire-fighting.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
1, the batching of the bentonite after acidifying is made up of following component by weight percentage: bentonite semi-finished product 94.5%, quick dissolved sodium silicate 2.3%, polyvinyl alcohol 2%, hydroxypropyl methylcellulose 1% and sodium carbonate 0.2% after acidifying.
2, the bentonitic production method after acidifying: by abrasive dust in the bentonite batching input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the bentonite finished product after acidifying.
3, the half-finished production method of the bentonite after acidifying: in the mixer (1) first bentonite after weathering input having been turned round, then dilute sulfuric acid is slowly added and carries out acidification in the bentonite after weathering; (2) by the bentonite after acidification, push as bentonite tablet thickness≤3 millimeter of bentonite tablet by twin rollers; (3) bentonite tablet is transported to roasting in swinging drying oven, roasting time is 2 hours, and sintering temperature is controlled at 280~320 DEG C, bentonite tablet water content≤5% after roasting, and the bentonite tablet after roasting is the bentonite semi-finished product after acidifying.
4, the batching of bentonite tablet is made up of following component by weight percentage: the bentonite 72% after weathering and dilute sulfuric acid 28%.
5, the batching of dilute sulfuric acid is made up of following component by weight percentage: the sulfuric acid 2% of concentration 98 ﹪, water 98%.
6, bentonite raw ore need to be through two time weathering more than winter, bentonite the weathering that is fine particle from the raw ore disintegration of large block compact, pick obvious visible barren rock piece, string and other earth impurity, bentonite clay particle fineness≤5 millimeter after weathering.

Claims (1)

1. the bentonite after an acidifying, it is characterized in that, the bentonite batching after acidifying is made up of following component by weight percentage: bentonite semi-finished product 90~98%, quick dissolved sodium silicate 0.1~5%, polyvinyl alcohol 0.1~5%, hydroxypropyl methylcellulose 0.01~3% and sodium carbonate 0~3% after acidifying;
The half-finished production method of bentonite after described acidifying: in the mixer (1) first bentonite after weathering input having been turned round, then dilute sulfuric acid is slowly added and carries out acidification in the bentonite after weathering; (2) by the bentonite after acidification, push as bentonite tablet thickness≤3 millimeter of bentonite tablet by twin rollers; (3) bentonite tablet is transported to roasting in swinging drying oven, roasting time is 1~3 hour, sintering temperature is controlled at 250~350 DEG C, bentonite tablet water content≤5% after roasting, and the bentonite tablet after roasting is the bentonite semi-finished product after acidifying;
The batching of bentonite tablet is made up of following component by weight percentage: the bentonite 60~85% after weathering and dilute sulfuric acid 15~40%; The batching of dilute sulfuric acid is made up of following component by weight percentage: the sulfuric acid 1~5% of concentration 98 ﹪, water 95~99%; Bentonite raw ore need to be through two time weathering more than winter, bentonite the weathering that is fine particle from the raw ore disintegration of large block compact, pick obvious visible barren rock piece, string and other earth impurity, bentonite clay particle fineness≤5 millimeter after weathering;
Bentonitic production method after acidifying: by abrasive dust in the bentonite batching input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the bentonite finished product after acidifying.
CN201410237844.8A 2014-06-01 2014-06-01 Bentonite after acidifying Active CN103979559B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106280758A (en) * 2016-07-29 2017-01-04 蒋文兰 Bentonite photocatalytic spray liquid can be cleaned
CN108083291A (en) * 2018-01-31 2018-05-29 安徽国创非金属矿业科技有限公司 A kind of method for improving bentonite inorganic gel yield

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101230210A (en) * 2007-12-28 2008-07-30 河北工业大学 Method for preparing organic modified silicate mineral clay
CN103172077A (en) * 2013-03-18 2013-06-26 芜湖飞尚非金属材料有限公司 Preparation method of special trenchless mud bentonite

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101230210A (en) * 2007-12-28 2008-07-30 河北工业大学 Method for preparing organic modified silicate mineral clay
CN103172077A (en) * 2013-03-18 2013-06-26 芜湖飞尚非金属材料有限公司 Preparation method of special trenchless mud bentonite

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Address after: 211700 Yulan Avenue 38-2, Xuyi County Economic Development Zone, Huaian City, Jiangsu Province

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Patentee before: Xu Sheng Ying

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