Preparation method of bentonite for slurry

A technology of bentonite and mud, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low recovery rate of sodium-modified semi-finished products, increased process production complexity, and poor industrial operability, etc. , to achieve the effects of low preparation cost, improved macroscopic properties, and stable product quality

Inactive Publication Date: 2013-01-30
湖北中非膨润土有限公司
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Problems solved by technology

However, in this method, a hydrocyclone and a horizontal screw centrifuge are connected in series for purification after the raw ore is sodiumized. The recovery rate of the sodiumized modified semi-finished product is not high, which increases the complexity of the pr

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  • Preparation method of bentonite for slurry

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preparation example Construction

[0023] See figure 1 A preparation method of bentonite for mud, comprising the following steps:

[0024] (1) Drying and breaking. The calcium-based bentonite raw material is air-dried to a moisture content of ≤22%, coarse sand and stones are removed, and transported to a hammer crusher for crushing to obtain a mineral material with a particle size of ≤25mm.

[0025] (2) Sodium modification. The mineral material is transported to the roller compactor, and the roller compactor adopts a planetary roller mill or a double-screw extruder. Add sodiumizing agent and mix for 4 to 6 minutes. The sodiumizing agent is sodium carbonate or sodium fluoride. The amount added is 2.0% to 5.0% of the mass of the ore. Sodium ions are provided in the aqueous solution, so that the mineral material and the sodiumizing agent fully undergo a sodiumizing reaction, the water content is controlled at 22% to 25%, and the sodiumizing material is obtained by rolling for 15 to 30 minutes.

[0026] (3) Dri...

Embodiment 1

[0029] A preparation method of bentonite for mud, comprising the following steps:

[0030] (1) Drying and breaking. The calcium-based bentonite raw ore is air-dried to a moisture content of ≤22%, coarse sand and stones are removed, and transported to a hammer crusher for crushing to obtain mineral materials with a crushed particle size of ≤25mm.

[0031] (2) Sodium modification. Transport the mineral material to the planetary wheel mill, first add 2.0% of the mineral material mass of sodium carbonate and mix for 4 minutes, then add water, mix and roll to carry out sodium modification, control the water content at 22%, and roll for 15 minutes to obtain sodium material.

[0032] (3) Dried and broken. Transport the sodiumized material to a powerful drying pulverizer, crush and disperse it while drying, and control the moisture content to ≤12% to obtain semi-finished products.

[0033] (4) Synergistic milling. Add 1.0% sodium hydroxide and 0.5% polyacrylamide to the semi-fini...

Embodiment 2

[0035]A preparation method of bentonite for mud, comprising the following steps:

[0036] (1) Drying and breaking. The calcium-based bentonite raw ore is air-dried to a moisture content of ≤22%, coarse sand and stones are removed, and transported to a hammer crusher for crushing to obtain mineral materials with a crushed particle size of ≤25mm.

[0037] (2) Sodium modification. Transport the mineral material to the planetary wheel mill, first add 4.0% of the mineral material quality sodium carbonate and mix for 5 minutes, then add water, mix and roll for sodium modification, control the water content at 23%, and roll for 20 minutes to get sodium material.

[0038] (3) Dried and broken. Transport the sodiumized material to a powerful drying pulverizer, crush and disperse it while drying, and control the moisture content to ≤12% to obtain semi-finished products.

[0039] (4) Synergistic milling. Add 1.2% sodium hydroxide and 1.0% polyacrylamide to the semi-finished product,...

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Abstract

The invention discloses a preparation method of bentonite for slurry. The method comprises steps of airing and crushing, sodium modification, baking and breaking, and synergizing and grinding. After being aired and crushed, calcium-based bentonite raw ore material is delivered into a rubbing mill; a sodium agent and water are added into the crushed raw ore material, mixed, stirred and rubbed to obtain a sodium material; the sodium material is delivered into a drying grinder for baking and breaking, so that a semi-finished product is obtained; a synergist containing sodium hydroxide and macro-molecular polymer is added into the semi-finished product; and the semi-finished product is ground and packaged to obtain a high-viscosity and low-filter-loss bontonite finished product for slurry The preparation method is simple in process and low in preparation cost, and is particularly applicable to preparation of bentonite for slurry in petroleum drilling and geological exploration drilling.

Description

technical field [0001] The invention relates to a preparation method of bentonite, in particular to a preparation method of bentonite for mud with high viscosity and low fluid loss. Background technique [0002] Bentonite is a clay mainly containing montmorillonite. Montmorillonite is a layered silicate mineral composed of two layers of Si-O tetrahedron sandwiching a layer of Al-(O, OH) octahedron as a structural unit. Its structure has two characteristics: ①The crystal layers are connected by van der Waals force, which is weak; ②Part of the tetrahedron can be Al 3+ Instead, Al in the octahedron can be replaced by Fe, Mg, Zn plasma, so that the crystal layer plane is negatively charged. The former makes it easy for water molecules to enter the interlayer of the unit cell to expand; the latter makes the surface of clay particles spontaneously adsorb counter-charged ions (cations) to form complexes or organic and inorganic compounds. When bentonite is dispersed in water, ...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 王鸽谢爱虎郭海盈叶永波徐光亮
Owner 湖北中非膨润土有限公司
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