CN102166783B - Production method of attapulgite china clay powder - Google Patents

Abstract

The invention discloses a production method of attapulgite china clay powder. The main points of the technical scheme are as follows: mixing the burdening of the attapulgite china clay powder; smashing the mixture; soaking the smashed mixture by water; carrying out sodium treatment on a wet-shaped mixture; pressing the wet-shaped mixture into a sheet-shaped object; extruding the sheet-shaped object into a strip-shaped object; grinding the aired strip-shaped object into a powder-shaped object; and deironing and packaging the powder-shaped object into an attapulgite china clay powder finished product which is composed of attapulgite clay, white bentonite, calcined flint clay, kaoline and sodium carbonate. The ceramic product produced by using the attapulgite china clay powder has better cohesiveness, plasticity, thixotropy, fire resistance and thermostability, also has small contractibility rate, does not deform, and has good strength and uniform texture; and by adopting a pipeline self-unloading permanent magnet iron removing device to deiron the semi-finished products, the whiteness of the attapulgite china clay powder can be effectively improved. The attapulgite china clay powder can be suitable for producing the ceramic products.

Description

The production method of concavo-convex excellent china clay in powder

Technical field

The present invention relates to china clay, be specifically related to a kind of production method of concavo-convex excellent china clay in powder.

Background technology

The composition of china clay mainly is a kaolin; And containing feldspar, quartz, mica, iron ore and other fragments as the rock in china clay source, china clay is the primary raw material of pottery, develops kaolin that high-grade household china needs high-quality as raw material; 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 raw material and replace kaolin or reduce kaolinic consumption, to protect our ecological environment,, the high-grade household china of future development guarantees for providing more sufficient raw 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 concavo-convex excellent china clay in powder is provided.

The production method of concavo-convex excellent china clay in powder is: pulverize after the batch mixes with concavo-convex excellent 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 tablet; Be squeezed into bar again, pulverize thing after the bar airing is packaged as the finished product of concavo-convex excellent china clay in powder after deironing.

Concavo-convex excellent china clay in powder is made up of Concave-convex clay rod, white bentonite, ripe flint clay, kaolin and sodium carbonate.

Concave-convex clay rod be a kind of layer of chain structure contain Shuifu County's zeopan clay mineral; Color is white in color, canescence, cinerous, celadon or weak silky luster; Magnesia in the Concave-convex clay rod can weaken in the ceramic base substrate because the yellow that Fe and Ti compound are produced; Promote the translucence of porcelain base, improve the mechanical strength of base substrate, the Concave-convex clay rod color that the present invention selects for use is white in color.

The Concave-convex clay rod soil property is fine and smooth, and oily soapy is arranged, and light weight, property are crisp, and fracture is conchoidal or irregular shape, and water imbibition is strong, tool viscosity and plasticity when wet, and its viscosity can reach more than the 3000mPas, helps the bonding between the raw material;

Concave-convex clay rod has unique dispersive property, suspension is met dielectric and do not produced flocculation sediment, and dry after-contraction 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 Concave-convex clay rod; These compositions are used for developing concavo-convex excellent expensive goods and belong to the impurity class; Be to need to get rid of, and in the present invention, these compositions are the plasticity that helps regulating concavo-convex excellent china clay in powder through the screening of purifying; Reduce the drying of base substrate and shrink, shorten drying time and prevent blank deformation.

The bentonitic Main Ingredients and Appearance of white is a montmorillonite; Be the mineral of the hydrous alumino silicates formation of a kind of layer structure, flaky crystal, the content of iron is less, has the flight of colors of going out and absorption property; Also have plasticity and good caking property, in the aqueous solution, be suspension and as a form of gel; Be easy to generate crackle after the bentonite drying; After soaking the sodium modification processing jointly with Concave-convex clay rod in the present invention; The ceramic that can avoid the use of concavo-convex excellent china clay in powder production cracks, and also helps the plasticity and raising whiteness of regulating concavo-convex excellent china clay in powder.

Flint clay is the multiple mixture that contains aluminosilicate; Main chemical compositions is silica and two kinds of oxides of alundum (Al; Ripe flint clay is that the flint clay raw ore forms after high-temperature calcination; Ripe flint clay whiteness and luminosity are good, have quality evenly, characteristic such as compact structure, volume stability, refractory temperature high strength be big, in water, be difficult for disperseing, plasticity is lower and water absorption rate is little, ripe in the present invention flint clay is used for improving the content of the alundum (Al of concavo-convex excellent china clay in powder; It is low to avoid into the porcelain temperature, reduces distortion and raising whiteness that ceramic produces when burning till.

The kaolin outward appearance is white, light gray isochrome, compact massive or loose earthy have soapy feeling; The sticking tongue in dry back; Water imbibition is arranged, and the kaolin refractoriness is high, the pure kaolin of matter have whiteness height, matter soft, be prone to dispersion suspension in water, good plasticity and high caking property; Kaolin calcined back look white, and whiteness can reach more than 80%.

Sodium carbonate is used for that in the present invention concavo-convex excellent china clay in powder batching is carried out sodium modification to be handled, and can improve the plasticity and the adhesive property of concavo-convex excellent china clay in powder.

The present invention is achieved through following technical proposals:

1, the production method of concavo-convex excellent china clay in powder is: (1) with the batch mixes of concavo-convex excellent china clay in powder after input pulverize in the pulverizer, 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) with being pressed into tablet in the moistening shape mixture input twin rollers, the thickness of tablet is less than 3 millimeters; (4) tablet 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) with carrying out abrasive dust in the cylindrical strip thing input grinding machine after the airing; And in the meal outlet access pipeline self-tipping type permanent-magnetic iron expeller with grinding machine; Powder to abrasive dust output carries out deironing, and the grain fineness of powder is packaged as the finished product of concavo-convex excellent china clay in powder less than 0.044 millimeter.

The batching of concavo-convex excellent china clay in powder is made up of following component by weight percentage: Concave-convex clay rod 35～60%, white bentonite 10～35%, ripe flint clay 5～30%, kaolin 2～15% and sodium carbonate 0.1～3%.

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

After the batching of concavo-convex excellent china clay in powder is handled, is pressed into tablet and is squeezed into bar through the immersion sodium, its internal microstructure quilt " bulking ", and form micro-gap and crack; Thereby moisture is got into wherein easily; Cause microstructural hydration swelling, so that the dispersion of under weak dispersion condition, just can in medium, disintegrating, viscosity higher formed; Thixotropy also obviously strengthens; Can also strengthen the old effect of concavo-convex excellent china clay in powder, improve the osmotic pressure of ion between the china clay in powder particle, improve the plasticity of concavo-convex excellent china clay in powder.

The ceramic that uses concavo-convex excellent china clay in powder to produce has caking property, plasticity preferably, and thixotropy, fire resistance and heat endurance have also that shrinkage factor is little, indeformable, intensity is good and the characteristics of quality homogeneous.

Adopt pipeline self-tipping type permanent-magnetic iron expeller that semi-finished product are carried out deironing, can effectively improve the whiteness of concavo-convex excellent china clay in powder.

The production method technology of concavo-convex excellent china clay in powder is simple, low production cost.

Concavo-convex excellent china clay in powder is applicable to the production ceramic.

The specific embodiment

Below in conjunction with embodiment the present invention is done further description:

1, the production method of concavo-convex excellent china clay in powder is: (1) with the batch mixes of concavo-convex excellent china clay in powder after input pulverize in the pulverizer, 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) with being pressed into tablet in the moistening shape mixture input twin rollers, the thickness of tablet is less than 3 millimeters; (4) tablet 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) with carrying out abrasive dust in the cylindrical strip thing input grinding machine after the airing; And in the meal outlet access pipeline self-tipping type permanent-magnetic iron expeller with grinding machine; Powder to abrasive dust output carries out deironing, and the grain fineness of powder is packaged as the finished product of concavo-convex excellent china clay in powder less than 0.044 millimeter.

The batching of concavo-convex excellent china clay in powder is made up of following component by weight percentage: Concave-convex clay rod 45%, white bentonite 28%, ripe flint clay 18%, kaolin 8% and sodium carbonate 1%.

Soaking the batching of sodium processing is made up of following component by weight percentage: mixture 64% and water 36% after the pulverizing.

Claims (1)

1. the production method of a concavo-convex excellent china clay in powder is characterized in that, (1) with the batch mixes of concavo-convex excellent china clay in powder after input pulverize in the pulverizer, 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) with being pressed into tablet in the moistening shape mixture input twin rollers, the thickness of tablet is less than 3 millimeters; (4) tablet 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) with carrying out abrasive dust in the cylindrical strip thing input grinding machine after the airing; And in the meal outlet access pipeline self-tipping type permanent-magnetic iron expeller with grinding machine; Powder to abrasive dust output carries out deironing, and the grain fineness of powder is packaged as the finished product of concavo-convex excellent china clay in powder less than 0.044 millimeter;

The batching of concavo-convex excellent china clay in powder is made up of following component by weight percentage: Concave-convex clay rod 35～60%, white bentonite 10～35%, ripe flint clay 5～30%, kaolin 2～15% and sodium carbonate 0.1～3%;

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