CN103979564A - Sodium-modified bentonite - Google Patents

Sodium-modified bentonite Download PDF

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Publication number
CN103979564A
CN103979564A CN201410237840.XA CN201410237840A CN103979564A CN 103979564 A CN103979564 A CN 103979564A CN 201410237840 A CN201410237840 A CN 201410237840A CN 103979564 A CN103979564 A CN 103979564A
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China
Prior art keywords
sodium
calcium
wilkinite
base bentonite
flap
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CN201410237840.XA
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CN103979564B (en
Inventor
黄飞翔
黄允金
陈丽萍
许盛英
许庆华
蒋文兰
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Guangxi Shangsi Fushi Mining Co., Ltd.
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许盛英
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Abstract

The invention discloses a sodium-modified bentonite. The technical scheme is as follows: the sodium-modified bentonite is composed of calcium bentonite, magnesium oxide, sodium carbonate, instant sodium silicate, polyvinyl alcohol and hydroxypropyl methylcellulose. The production method of the sodium-modified bentonite comprises the following steps: inputting sodium-modified bentonite materials into a mill, and milling into powder, thereby obtaining the sodium-modified bentonite. The sodium modification can enhance the water absorptivity, expansion coefficient, colloid viscosity, cation exchange capacity, and dispersivity and suspension percentage in an aqueous medium of the bentonite. The sodium-modified bentonite has the characteristics of favorable thixotropy, favorable lubricating property, favorable heat stability, higher plasticity, high binding property, high hot wet tensile strength and high dry pressing strength. The sodium-modified bentonite can achieve related technical indexes of sodium bentonite, and can be widely used for producing products in the fields of industry, agriculture, construction, firefighting and the like.

Description

Wilkinite after sodium
Technical field
The present invention relates to sodium processing, be specifically related to the wilkinite after a kind of sodium.
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; The reserves of sodium bentonite are less, but sodium bentonite is better than the performance of calcium-base bentonite, therefore, in order to improve the performance of calcium-base bentonite, need to carry out sodium modification processing to calcium-base bentonite.Routine is carried out the method for calcium-base bentonite sodium modification processing, is sodium carbonate is directly added in raw ore of calcium base bentonite sodium post-drying and abrasive dust.
In wilkinite mining area, usage mining machine carries out mechanical mining wilkinite raw ore, excavate out be a kind of compact mass wilkinite raw ore, the volume of wilkinite raw ore is larger, can not be directly used in sodium processing, be to adopt pulverizer to be broken for tiny particle mostly, be easy to destroy bentonitic crystalline structure, affect the quality of product.
Sodium is not carried out follow-up complementary modification after processing, and can not improve the quality of wilkinite product comprehensively.
China Patent Publication No. CN 103553063 A, open day: on 02 05th, 2014, name is called " wilkinite sodium modification novel process ", " novel process of a kind of wilkinite sodium modification, it comprises the steps: that mineral resources screening-rotary cultivator cutting and crushing-add properties-correcting agent mixes sodium-turn over mix-ageing of shovel-dry-grinding-detection metering packing-finished product " disclosed; " cancel duplex stirring and pair roller extruding two large operations, can simplify technique "; " utilize moist wilkinite self moisture, sodium carbonate is dissolved, carry out sodium with bentonitic mineral composition montmorillonite generation replacement(metathesis)reaction "; " adopt the mode of airing or oven drying at low temperature dry, make water content at 0.5-2% " ...
The weak point of above-mentioned patent is: wilkinite sodium adopts merely " rotary cultivator cutting and crushing ", " turning over mix-ageing of shovel " and " utilizing moist wilkinite self moisture; sodium carbonate is dissolved; carry out sodium with bentonitic mineral composition montmorillonite generation replacement(metathesis)reaction ", sodium carbonate can not be well and montmorillonite carry out complete sodium, the effect of sodium is bad; After wilkinite sodium, " adopt the mode of airing or oven drying at low temperature dry; to make water content at 0.5-2% ", in the time that after wilkinite sodium, water content is less than 2%, directly have influence on the quality of sodium bentonite, bentonitic colloid viscosity will significantly decline, the simple sodium carbonate that adopts carries out sodium processing, can not improve bentonitic property indices comprehensively.
Summary of the invention
The object of the invention is to overcome weak point in prior art, the wilkinite after a kind of sodium is provided.
Wilkinite batching after sodium is made up of calcium-base bentonite, magnesium oxide, sodium carbonate, quick dissolved sodium silicate, polyvinyl alcohol and Vltra tears.
Bentonitic production method after sodium: by abrasive dust in the wilkinite batching input grinding machine after sodium, the meal after abrasive dust is the wilkinite after sodium.
The Performance Ratio calcium-base bentonite of sodium bentonite good, but the distribution of calcium-base bentonite is far extensively in sodium bentonite in the world, therefore find sodium bentonite except strengthening, need to carry out sodium modification processing to calcium-base bentonite, to improve the utilization ratio of sodium bentonite.
Magnesium oxide has the general character of basic oxide, belongs to gelling material, can improve bentonitic colloidal property.
Sodium carbonate has the general character and the thermostability of salt, soluble in water, and its aqueous solution is alkalescence, is the main raw material of sodium in the present invention.
Quick dissolved sodium silicate is white pulverulent 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, particulate state, Powdered three kinds; Nonpoisonous and tasteless, particulate state 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, polymerizability, cohesiveness and water-retentivity.
Vltra tears has thickening capabilities, salt discharge, pH stability, water-retentivity, dimensional stability, good film-forming properties and the feature such as resistance to enzyme, dispersiveness and cohesiveness widely.
The present invention is achieved by following technical proposals:
1, the batching of the wilkinite after sodium is made up of following component by weight percentage: wilkinite flap 90~98%, quick dissolved sodium silicate 0.1~5%, polyvinyl alcohol 0.1~5% and Vltra tears 0.01~3%.
2, the bentonitic production method after sodium: by abrasive dust in the wilkinite batching input grinding machine after sodium, particle fineness≤0.074 millimeter, the meal after abrasive dust is the wilkinite after sodium.
3, the production method of wilkinite flap: (1) by calcium-base bentonite mixture input fermentation vat, then water is slowly added in calcium-base bentonite mixture and soaks sodium, sodium soak time is 24~72 hours; (2) take out the calcium-base bentonite mixture after soaking, input is stirred in biaxial rneader, inputs and in extrusion machine, be extruded into wilkinite flap, wilkinite thickness of flap≤3 millimeter after stirring; (3) wilkinite flap is transported in rotary type stoving oven and is dried, drying time control is 1~3 hour, and bake out temperature is controlled at 80~100 DEG C, and the wilkinite flap water content after oven dry is 10~15%, and PCm is weight percentage.
4, the batching of wilkinite flap is made up of following component by weight percentage: calcium-base bentonite mixture 65~85% and water 15~35%.
5, the production method of calcium-base bentonite mixture: by stirring in the batching input stirrer of calcium-base bentonite mixture, be calcium-base bentonite mixture after stirring.
6, the batching of calcium-base bentonite mixture is made up of following component by weight percentage: calcium-base bentonite 92~98%, magnesium oxide 0.5~5% and sodium carbonate 0.5~5% after weathering.
7, raw ore of calcium base bentonite need to be through two time weathering more than winter, calcium-base bentonite the weathering that is fine particle from the raw ore disintegration of large block compact, pick obvious visible barren rock piece, vegetable fibre and other earth impurity, calcium-base bentonite particle fineness≤5 millimeter after weathering.
Bentonitic production method after sodium takes first sodium to carry out compounding ingredient again, can avoid sodium carbonate and quick dissolved sodium silicate, polyvinyl alcohol and Vltra tears generation chemical reaction, give full play to raw-material characteristic separately in batching, and obtain complementation, guarantee the wilkinite inner quality after sodium.
The present invention makes full use of sun power, wind and rain alternately and with the passage of time, promotes the weathering effect to raw ore of calcium base bentonite, improves the disintegration effect of raw ore of calcium base bentonite, accelerates the dispersion of raw ore of calcium base bentonite.
Wilkinite after sodium can improve bentonitic water-intake rate, colloid index, expansion multiple, colloid viscosity, cation exchange capacity, dispersiveness and suspensibility in water medium.
Wilkinite after sodium has good thixotropy, oilness, thermostability, higher plasticity-, stronger cohesiveness, hot green tensile strength and the high feature of dry-pressing intensity.
Wilkinite after sodium can reach the relevant technologies index of sodium bentonite, can be widely used in the product in the fields such as production all types of industries, agricultural, building and fire-fighting.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
1, the batching of the wilkinite after sodium is made up of following component by weight percentage: wilkinite flap 96.1%, quick dissolved sodium silicate 2%, polyvinyl alcohol 1.5% and Vltra tears 0.4%.
2, the bentonitic production method after sodium: by abrasive dust in the wilkinite batching input grinding machine after sodium, particle fineness≤0.074 millimeter, the meal after abrasive dust is the wilkinite after sodium.
3, the production method of wilkinite flap: (1) by calcium-base bentonite mixture input fermentation vat, then water is slowly added in calcium-base bentonite mixture and soaks sodium, sodium soak time is 48 hours; (2) take out the calcium-base bentonite mixture after soaking, input is stirred in biaxial rneader, inputs and in extrusion machine, be extruded into wilkinite flap, wilkinite thickness of flap≤3 millimeter after stirring; (3) wilkinite flap is transported in rotary type stoving oven and is dried, drying time control is 2 hours, and bake out temperature is controlled at 80~100 DEG C, and the wilkinite flap water content after oven dry is 10~12%.
4, the batching of wilkinite flap is made up of following component by weight percentage: calcium-base bentonite mixture 70% and water 30%.
5, the production method of calcium-base bentonite mixture: by stirring in the batching input stirrer of calcium-base bentonite mixture, be calcium-base bentonite mixture after stirring.
6, the batching of calcium-base bentonite mixture is made up of following component by weight percentage: calcium-base bentonite 95%, magnesium oxide 3% and sodium carbonate 2% after weathering.
7, raw ore of calcium base bentonite need to be through two time weathering more than winter, calcium-base bentonite the weathering that is fine particle from the raw ore disintegration of large block compact, pick obvious visible barren rock piece, vegetable fibre and other earth impurity, calcium-base bentonite particle fineness≤5 millimeter after weathering.

Claims (7)

1. the wilkinite after a sodium, it is characterized in that, the wilkinite batching after sodium is made up of following component by weight percentage: wilkinite flap 90~98%, quick dissolved sodium silicate 0.1~5%, polyvinyl alcohol 0.1~5% and Vltra tears 0.01~3%.
2. the bentonitic production method after sodium according to claim 1, is characterized in that, by abrasive dust in the wilkinite batching input grinding machine after sodium, and particle fineness≤0.074 millimeter, the meal after abrasive dust is the wilkinite after sodium.
3. the production method of wilkinite flap according to claim 1, is characterized in that, (1) by calcium-base bentonite mixture input fermentation vat, then water is slowly added in calcium-base bentonite mixture and soaks sodium, and sodium soak time is 24~72 hours; (2) take out the calcium-base bentonite mixture after soaking, input is stirred in biaxial rneader, inputs and in extrusion machine, be extruded into wilkinite flap, wilkinite thickness of flap≤3 millimeter after stirring; (3) wilkinite flap is transported in rotary type stoving oven and is dried, drying time control is 1~3 hour, and bake out temperature is controlled at 80~100 DEG C, and the wilkinite flap water content after oven dry is 10~15%, and PCm is weight percentage.
4. the batching of wilkinite flap according to claim 1, is characterized in that, the batching of wilkinite flap is made up of following component by weight percentage: calcium-base bentonite mixture 65~85% and water 15~35%.
5. the production method of calcium-base bentonite mixture according to claim 3, is characterized in that, by stirring in the batching input stirrer of calcium-base bentonite mixture, is calcium-base bentonite mixture after stirring.
6. the batching of calcium-base bentonite mixture according to claim 5, it is characterized in that, the batching of calcium-base bentonite mixture is made up of following component by weight percentage: calcium-base bentonite 92~98%, magnesium oxide 0.5~5% and sodium carbonate 0.5~5% after weathering.
7. the calcium-base bentonite after weathering according to claim 6, it is characterized in that, raw ore of calcium base bentonite need to be through two time weathering more than winter, calcium-base bentonite the weathering that is fine particle from the raw ore disintegration of large block compact, pick obvious visible barren rock piece, vegetable fibre and other earth impurity, calcium-base bentonite particle fineness≤5 millimeter after weathering.
CN201410237840.XA 2014-06-01 2014-06-01 Wilkinite after sodium Active CN103979564B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106283853A (en) * 2016-08-13 2017-01-04 傅强 A kind of papermaking bentonite production technology of humidity resistance
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
CN111024884A (en) * 2019-12-02 2020-04-17 武汉科技大学 Bentonite quality detection and evaluation method for metallurgical pellet binder
CN111826140A (en) * 2020-08-05 2020-10-27 淄博金藏新材料科技有限公司 Special strong adhesive for bentonite and use method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85105253A (en) * 1985-07-11 1987-04-15 地质矿产部探矿工程研究所 Process for artificial sodium based bentonite
JP2008290923A (en) * 2007-05-28 2008-12-04 Kurosaki Hakudo Kogyo Kk Modified bentonite with improved water dispersibility and its manufacturing method
CN101774596A (en) * 2010-01-13 2010-07-14 中国非金属矿工业公司 Cheto-type bentonite sodium modification method and device thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85105253A (en) * 1985-07-11 1987-04-15 地质矿产部探矿工程研究所 Process for artificial sodium based bentonite
JP2008290923A (en) * 2007-05-28 2008-12-04 Kurosaki Hakudo Kogyo Kk Modified bentonite with improved water dispersibility and its manufacturing method
CN101774596A (en) * 2010-01-13 2010-07-14 中国非金属矿工业公司 Cheto-type bentonite sodium modification method and device thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106283853A (en) * 2016-08-13 2017-01-04 傅强 A kind of papermaking bentonite production technology of humidity resistance
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
CN111024884A (en) * 2019-12-02 2020-04-17 武汉科技大学 Bentonite quality detection and evaluation method for metallurgical pellet binder
CN111024884B (en) * 2019-12-02 2022-04-22 武汉科技大学 Bentonite quality detection and evaluation method for metallurgical pellet binder
CN111826140A (en) * 2020-08-05 2020-10-27 淄博金藏新材料科技有限公司 Special strong adhesive for bentonite and use method thereof

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