CN102180648A - Production method of porous attapulgite ceramic clay powder - Google Patents

Abstract

The invention discloses a production method of porous attapulgite ceramic clay powder. The technical scheme is characterized by comprising the following steps: mixing porous attapulgite ceramic clay powder and then smashing; soaking a smashed mixture by water; carrying out sodium modification on the soaked mixture to obtain a moist mixture; compressing the moist mixture to form a platelet; extruding to form a strap; drying the strap and then grinding the strap into powder; mixing and stirring ingredients of porous attapulgite ceramic clay powder; and packaging into finished products of porous attapulgite ceramic clay powder after even stirring. The porous attapulgite ceramic clay powder is composed of attapulgite clay, calcined clay, diatomite, plant straw powder, coal particles, ultrafine polyvinyl alcohol powder, sodium carbonate and lauryl sodium sulfate. The porous ceramic produced by using the porous attapulgite ceramic clay powder has the characteristics of high porosity, low ventilation resistance, controllable aperture, high temperature resistance, high pressure resistance, high chemical mediator corrosion resistance and the like, and is easy to clean and regenerate. The porous attapulgite ceramic clay powder is suitable for producing porous ceramic products.

Description

The production method of Attapulgite porous china clay in powder

Technical field

The present invention relates to china clay, be specifically related to a kind of production method of Attapulgite porous china clay in powder.

Background technology

Development along with science and technology and suitability for industrialized production, problems such as the energy, resource, the disposal of three wastes come into one's own more, porous ceramic film material because have that porosity height, air permeance resistance are little, controllable bore diameter, cleaning and regeneration is convenient and characteristics such as high temperature resistant, high pressure, resistant to chemical media corrosion, be used widely in fields such as oil, chemical industry, pharmacy, food, environmental protection and water treatments at present.

The main raw material(s) of porous ceramic film material is a china clay, the main component of china clay is a kaolin, and contain feldspar, quartzite, mica, iron ore and other fragments as the rock in china clay source, the high speed development of domestic ceramic industry in recent years, kaolinic consumption is also increased severely thereupon, but along with the exhaustion of high grade kaolinite mineral ore, the price of china clay skyrockets day by day.

Under the prerequisite that guarantees the china clay quality, develop new china clay starting material and replace kaolin or reduce kaolinic consumption, to protect our ecotope,, the future development porous ceramic film material guarantees for providing more competent starting material.

Summary of the invention

The objective of the invention is to overcome weak point in the prior art, a kind of production method of Attapulgite porous china clay in powder is provided.

The production method of Attapulgite porous china clay in powder is: pulverize after the starting material mixing with Attapulgite porous china clay in powder earlier, mixture water after the pulverizing soaks sodium and is treated to moistening shape mixture, moistening shape mixture is pressed into flap, be squeezed into bar again, pulverize thing after the bar airing, stir after the batch mixes with Attapulgite porous china clay in powder again, be packaged as the finished product of Attapulgite porous china clay in powder after stirring.

Attapulgite porous china clay in powder is made up of attapulgite clay, ripe flint clay, diatomite, plant stalk powder, coal grain, micronized polyethylene alcohol powder, yellow soda ash and sodium lauryl sulphate.

Attapulgite clay be a kind of layer of chain-like structure contain Shuifu County's zeopan clay mineral, crystal is needle-like, fibrous or fiber collection shape because the inner porous of attapulgite clay road, specific surface is big, can reach 500m ²More than/the g, help improving the porosity in the porous ceramic articles.

Attapulgite clay soil property exquisiteness has oily soapy, and light weight, property are crisp, and fracture is conchoidal or irregular shape, and water-absorbent is strong, tool viscosity and plasticity-when wet, and its viscosity can reach more than the 3000mPas, helps the bonding between the starting material; Magnesium oxide in the attapulgite clay can weaken in the ceramic base substrate because the yellow that Fe and Ti compound are produced, and promotes the translucency of porcelain base, improves the physical strength of base substrate.

Attapulgite clay has unique dispersing property, suspension is met dielectric medium and do not produced flocculation sediment, and dry post shrinkage is little, does not produce be full of cracks, and has good, the high temperature resistant and anti-good properties such as saline and alkaline of thixotropy;

Also contain a spot of hydromica, quartz, feldspar, kaolinite, sepiolite and opal in the attapulgite clay, these compositions are used for developing the Attapulgite expensive goods and belong to the impurity class, be to need to get rid of through the screening of purifying, and in the present invention, these compositions are the plasticity-that helps regulating Attapulgite porous china clay in powder, reduce the dry shrinkage of base substrate, shorten time of drying and prevent blank deformation.

Flint clay is the multiple mixture that contains aluminosilicate, main chemical compositions is silicon-dioxide and two kinds of oxide compounds of aluminium sesquioxide, ripe flint clay is that the flint clay raw ore forms after high-temperature calcination, ripe flint clay whiteness and luminosity are good, it is even to have quality, compact structure, volume stability, the refractory temperature high strength is big, in water, be difficult for disperseing, plasticity-is hanged down and characteristics such as water-intake rate is little, ripe in the present invention flint clay is used for improving the content of the aluminium sesquioxide of Attapulgite porous china clay in powder, it is low to avoid into the porcelain temperature, reduce the distortion that porous ceramic articles produces when burning till, can prevent that also porous ceramic articles from producing the atrophy in aperture in sintering process.

Diatomaceous mineral composition mainly is opal and mutation thereof, secondly is clay mineral-hydromica, kaolinite and mineral chip, and quartz, feldspar, biotite and organic matter etc. are arranged in the mineral chip; Diatomite has exquisiteness, loose, light weight, porous, water-absorbent and the strong characteristics of perviousness, helps improving porous ceramic articles mesoporosity rate.

Yellow soda ash is used for the starting material of Attapulgite porous china clay in powder are carried out the sodium modification processing in the present invention, can improve the plasticity-and the adhesive property of Attapulgite porous china clay in powder.

Plant stalk powder is the flour of wearing into after being dried by timber tankage, paddy rice, wheat, rape, seeding corn and other crops straw and accessory substance, be a kind of pore-forming material in the present invention, use Attapulgite porous china clay in powder to make the base substrate of porous ceramics, after the intravital plant stalk powder of base produces the burning volatilization in sintering process, in base substrate, stay less pore.

The coal grain adopts stone coal to pulverize, and is a kind of pore-forming material in the present invention, uses Attapulgite porous china clay in powder to make the base substrate of porous ceramics, after the intravital coal grain of base produces the burning volatilization in sintering process, stays bigger pore in base substrate.

Micronized polyethylene alcohol powder is soluble in water, is a kind of softening agent in the present invention, helps increasing the cohesiveness and the plasticity-of Attapulgite porous china clay in powder, and can improve the emulsification and the foaming effect of sodium lauryl sulphate.

Sodium lauryl sulphate is white powder, and is soluble in water, has good emulsifying, foaming, infiltration, decontamination and dispersing property, foam is abundant, the characteristics that biological degradation is fast are a kind of whipping agent in the present invention, are used to increase the void content of Attapulgite porous china clay in powder.

The present invention is achieved by following technical proposals:

1, the production method of Attapulgite porous china clay in powder is: pulverize in (1) starting material mixing back input pulverizer with Attapulgite porous china clay in powder, the compound particles fineness after the pulverizing is less than 0.25 millimeter; (2) mixture after will pulverizing adds in the fermentation vat water and soaks sodium and be treated to moistening shape mixture, soaks the sodium time to be controlled at 1～10 day; (3) will be pressed into flap in the moistening shape mixture input twin rollers, the thickness of flap is less than 3 millimeters; (4) flap is imported be squeezed into cylindrical strip thing in the vacuum-extruder, the diameter of cylindrical strip thing is controlled at 2～10 millimeters, and (5) are input to the cement threshing ground with cylindrical strip thing and carry out airing, and the cylindrical strip thing water content after the airing is less than 15%; (6) will carry out abrasive dust in the cylindrical strip thing input grinding machine after the airing, particles of powder fineness behind the abrasive dust is less than 0.074 millimeter, (7) with stirring in the input stirrer after the batch mixes of Attapulgite porous china clay in powder, be packaged as the finished product of Attapulgite porous china clay in powder after stirring;

The raw-material batching of Attapulgite porous china clay in powder is made up of following component by weight percentage: attapulgite clay 45～65%, ripe flint clay 5～35%, diatomite 5～20%, plant stalk powder 2～15% and yellow soda ash 0.1～3%;

Soaking the batching of sodium processing is made up of following component by weight percentage: mixture 55～75% after the pulverizing and water 25～45%;

The batching of Attapulgite porous china clay in powder is made up of following component by weight percentage: the meal 80～95% behind the abrasive dust, coal grain 2～15%, micronized polyethylene alcohol powder 0.01～3% and sodium lauryl sulphate 0.01～3%;

The particle fineness of described plant stalk powder is less than 0.25 millimeter, and the particle fineness of coal grain is less than 5 millimeters.

After the starting material of Attapulgite porous china clay in powder are handled, are pressed into flap and are squeezed into bar through the immersion sodium, its internal microstructure is by " bulking ", and form micro-gap and crack, thereby moisture is entered wherein easily, cause microstructural hydration swelling, so that the dispersion of under weak dispersion condition, just can in medium, disintegrating, form viscosity higher, thixotropy also obviously strengthens, can also strengthen the old effect of Attapulgite porous china clay in powder, improve ionic seepage water pressure between the china clay in powder particle, improve the plasticity-of Attapulgite porous china clay in powder.

Use the porous ceramics pore volume of Attapulgite porous china clay in powder production can reach more than 55% of cumulative volume, have that porosity height, air permeance resistance are little, controllable bore diameter, cleaning and regeneration is convenient and characteristics such as high temperature resistant, high pressure, resistant to chemical media corrosion, the size in porous ceramics aperture can be adjusted the particle fineness and the sodium lauryl sulphate usage quantity of the meal behind the abrasive dust, coal grain as required.

Attapulgite porous china clay in powder has cohesiveness, plasticity-preferably, thixotropy, resistivity against fire and thermostability, have also that shrinking percentage is little, indeformable, intensity is good and the characteristics of quality homogeneous, can guarantee that porous ceramic articles behind the sintering has higher void content and good intensity.

Attapulgite porous china clay in powder is applicable to the production porous ceramic articles.

Embodiment

The invention will be further described below in conjunction with embodiment:

1, the production method of Attapulgite porous china clay in powder is: pulverize in (1) starting material mixing back input pulverizer with Attapulgite porous china clay in powder, the compound particles fineness after the pulverizing is less than 0.25 millimeter; (2) mixture after will pulverizing adds in the fermentation vat water and soaks sodium and be treated to moistening shape mixture, soaks the sodium time to be controlled at 5 days; (3) will be pressed into flap in the moistening shape mixture input twin rollers, the thickness of flap is less than 3 millimeters; (4) flap is imported be squeezed into cylindrical strip thing in the vacuum-extruder, the diameter of cylindrical strip thing is controlled at 4 millimeters, and (5) are input to the cement threshing ground with cylindrical strip thing and carry out airing, and the cylindrical strip thing water content after the airing is less than 15%; (6) will carry out abrasive dust in the cylindrical strip thing input grinding machine after the airing, particles of powder fineness behind the abrasive dust is less than 0.044 millimeter, (7) with stirring in the input stirrer after the batch mixes of Attapulgite porous china clay in powder, be packaged as the finished product of Attapulgite porous china clay in powder after stirring;

The raw-material batching of Attapulgite porous china clay in powder is made up of following component by weight percentage: attapulgite clay 58%, ripe flint clay 22%, diatomite 12%, plant stalk powder 6.5% and yellow soda ash 1.5%;

Soaking the batching of sodium processing is made up of following component by weight percentage: mixture 65% after the pulverizing and water 35%;

The batching of Attapulgite porous china clay in powder is made up of following component by weight percentage: the meal 85% behind the abrasive dust, coal grain 14%, micronized polyethylene alcohol powder 0.7% and sodium lauryl sulphate 0.3%;

The particle fineness of described plant stalk powder is less than 0.25 millimeter, and the particle fineness of coal grain is less than 3 millimeters.

Claims (1)

1. the production method of an Attapulgite porous china clay in powder is characterized in that, pulverizes in (1) starting material mixing back input pulverizer with Attapulgite porous china clay in powder, and the compound particles fineness after the pulverizing is less than 0.25 millimeter; (2) mixture after will pulverizing adds in the fermentation vat water and soaks sodium and be treated to moistening shape mixture, soaks the sodium time to be controlled at 1～10 day; (3) will be pressed into flap in the moistening shape mixture input twin rollers, the thickness of flap is less than 3 millimeters; (4) flap is imported be squeezed into cylindrical strip thing in the vacuum-extruder, the diameter of cylindrical strip thing is controlled at 2～10 millimeters, and (5) are input to the cement threshing ground with cylindrical strip thing and carry out airing, and the cylindrical strip thing water content after the airing is less than 15%; (6) will carry out abrasive dust in the cylindrical strip thing input grinding machine after the airing, particles of powder fineness behind the abrasive dust is less than 0.074 millimeter, (7) with stirring in the input stirrer after the batch mixes of Attapulgite porous china clay in powder, be packaged as the finished product of Attapulgite porous china clay in powder after stirring;

The raw-material batching of Attapulgite porous china clay in powder is made up of following component by weight percentage: attapulgite clay 45～65%, ripe flint clay 5～35%, diatomite 5～20%, plant stalk powder 2～15% and yellow soda ash 0.1～3%;

Soaking the batching of sodium processing is made up of following component by weight percentage: mixture 55～75% after the pulverizing and water 25～45%;

The batching of Attapulgite porous china clay in powder is made up of following component by weight percentage: the meal 80～95% behind the abrasive dust, coal grain 2～15%, micronized polyethylene alcohol powder 0.01～3% and sodium lauryl sulphate 0.01～3%;

The particle fineness of described plant stalk powder is less than 0.25 millimeter, and the particle fineness of coal grain is less than 5 millimeters.