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810results about How to "Lower firing temperature" patented technology

Glaze for fast-fired crystal glaze ceramic tile, and preparation method and applications of ceramic tile

ActiveCN104829268AReduce granularity requirementsSimple manufacturing processManufacturing technologyBrick
The invention provides a glaze for fast-fired crystal glaze ceramic tile and a preparation method and applications of ceramic tile. The glaze comprises basic crystal glaze and a color developing agent, wherein the basic crystal glaze comprises the following raw materials: zinc oxide, titanium dioxide, quartz, cryolite, zinc phosphate, kaolin, and lead frit. A proper amount of zinc phosphate is introduced into the glaze to avoid the raw material frit treatment, which is carried out to ensure the residual amount of nucleating agent, the requirements on the glaze granularity are reduced, the manufacture technologies of crystal glaze and ceramic tiles are simplified, and the technical difficulties that the crystal glaze sintering technology is complicated, the crystal patterns are difficult to control, and the production cost is high are solved. Moreover, the addition amount of quartz and lead frit is precisely controlled to obtain crystal glaze art ceramic tiles which have the advantages of good crystallization effect, strong three-dimensional effect, and good artistic effect. The provided preparation method has the advantages of simpleness, lower sintering temperature, shorter period, and suitability for massive industrial production.

Glaze material for Jun red glaze and process for preparing Jun porcelain from glaze material

InactiveCN105036812ABright colorWarm and smooth glazeClaywaresCalciteSlurry
The invention discloses a glaze material for Jun red glaze and a process for preparing Jun porcelain from the glaze material. The glaze material consists of the raw materials of melilite, quartzite, calcite, white feldspar, copper ore, ZnO, SnO, GuO, talc, BaO, zirconium silicate and spodumene. The preparation process comprises the following steps: firstly, smashing roughcast raw materials and conducting moulding to fire a plain roughcast, then immersing the plain roughcast into slurry of the glaze material of the Jun red glaze for glazing, and when the slurry adhered on the surface of the plain roughcast is dried, putting the plain roughcast in a kiln for firing, so as to obtain the Jun red glaze Jun porcelain. According to the glaze material for the Jun red glaze and the process for preparing the Jun porcelain by utilizing the glaze material, spodumene and zirconium silicate are added in the glaze material for the Jun red glaze, so that the fired Jun red glaze Jun porcelain is bright in color, mild and smooth in glaze surface, and uniform in cracking, and breaks through the condition that the general Jun red glaze Jun porcelain is dim in color and nonuniform in cracking; the Jun porcelain is taken as the specialty of China, and represents the advanced level of the manufacture process of China, and the social value of the Jun porcelain is improved.

Ceramic formula and preparation method for ceramic product

The invention provides a ceramic formula, comprising, by weight, 55 to 65 parts of clay, 20 to 30 parts of a flux and 15 to 23 parts of a fluxing agent, wherein the clay is a mixture of purple sandshale and china clay mixed according to a weight ratio of 0.67 to 2.0, the flux is shale, and the fluxing agent is one or more selected from the group consisting of limestone, calcite, diopside, wollastonite, dolomite, talcum and industrial waste residue. A preparation method for a ceramic product comprises the following steps: weighing the clay, the flux and the fluxing agent according to the formula, carrying out crushing and screening with a 250-mesh sieve, wherein the weight of screen residue is 1 to 1.5%, adding water, carrying out blending to obtain slurry and then carrying out drying and granulation so as to obtain powder; grading particles and then carrying out molding so as to prepare a green body; carrying out drying so as to prepare a dry body; and carrying out firing so as to prepare a seasonal ceramic body. According to the ceramic formula and the preparation method for the ceramic product in the invention, raw materials are cheap, process is simple, firing temperature is reduced, production cost is decreased, investment for production equipment is lowered down, production efficiency is improved, and energy consumption is reduced.

Energy-saving consumption-reducing technique for preparing haydite by co-disposing polluted soil and desilting sediment

The invention relates to an energy-saving consumption-reducing environment-friendly method for preparing haydite by co-disposing municipal massive solid wastes, which comprises the following steps: directly mixing polluted soil and polluted desilting sediment (without energy-consuming drying), adding a conditioner, granulating, and firing at 900-1200 DEG C for 15-40 minutes. The test indicates that the prepared haydite product has the following properties: the bulk density is 500-900 kg / m<3>, the cylindrical compressive strength is 5.0-10.0 Mpa, and the water absorptivity is 4.8-9.2%; and the leaching toxicities of typical heavy metals are as follows: Cu<0.26 mg / L, As<0.03 mg / L, Cd<0.0002 mg / L, and Hg<0.0001 mg / L. The method provided by the invention fully utilizes the water-content complementarity of the polluted soil and sewage reservoir sediment as well as the characteristic of mutual catalytic degradation of heavy metal pollutants and organic pollutants, implements energy saving and consumption reduction in the technical field of traditional techniques for preparing haydite from solid wastes, lowers the cost and secondary pollution in solid waste disposal industry, enhances the properties of the solid waste haydite, and widens the application field of the solid waste haydite.

Pre-heating decomposition method of producing sulfuric acid from phosphogypsum with co-production of cement

The invention relates to the technical field of industrial production of sulfuric acid and cement, the field of industrial solid waste comprehensive utilization, and the field of environment protection and treatment, and particularly relates to a pre-heating decomposition method of producing sulfuric acid from phosphogypsum with co-production of cement. The method includes the steps of powder grinding of raw materials, multi-stage cyclic pre-heating, high-effective decomposition and kiln gas separation and purification. The method is used for preparing a cement raw material from the phosphogypsum subjected to pre-heating decomposition with clay, sand rock, coke and such auxiliary materials in the process of producing the sulfuric acid from the phosphogypsum with co-production of the cement. The method solves the problems that a pre-heating decomposition technology in the prior art is low in decomposition ratio of phosphogypsum, is low in productivity of sulfuric acid and clinker, is liable to cause crusting and blocking in a kiln and is high in production energy consumption, can reduce the decomposition efficiency of the phosphogypsum and accelerate escape of SO2, and further increase the productivity of the sulfuric acid and cement clinker. The pre-heating decomposition method of producing the sulfuric acid from the phosphogypsum with co-production of the cement can significantly reduce sintering temperature and energy consumption of the clinker, can reduce production cost of sulfuric and cement clinker, and can further increase comprehensive utilization rate of the phosphogypsum.

Preparation method of ceramsite filter material for water treatment

The invention provides a preparation method for a ceramsite filter material for water treatment. The method is characterized by comprising the following steps: (1) mixing Bayer red mud powder in aluminum manufacturers in Shangdong province, river sediment powder in Xiaofu River at the section of Huangtuya in Zibo city of Shangdong province, gangue powder and a pore forming agent according to a mass ratio of 40-50:40-50:0-5:5-10 to obtain a mixture; (2) putting the mixture into a pan granulator and adding water, the mass of which is 20 to 25% of the mixture, for granulation into spherical particles with phi being 3 to 10 mm; (3) sintering and cooling the spherical particles after drying so as to obtain the ceramsite filter material. According to the invention, Bayer red mud powder in aluminum manufacturers in Shangdong province and river sediment powder in Xiaofu River at the section of Huangtuya in Zibo city of Shangdong province are used as the main raw materials and added at an equal or substantially equal amount, and a small amount of the pore forming agent is blended for the preparation of the ceramsite filter material; therefore, low cost is realized, the problem of flood passage capability of rivers is overcome, and environment pollution and land occupation caused by accumulation of Bayer red mud are simultaneously eliminated.

Micropore hydrogenated aluminum porcelain tube and preparation thereof

The invention relates to the field of an alumina ceramic pipe, in particular to a micropore alumina ceramic pipe and a method for preparing the same, and solves the problems that the prior art can not satisfy four good performances of high temperature resistance, corrosion resistance, high insulativity, and nontoxicity at the same time. The invention provides the micropore alumina ceramic pipe which is prepared from the following raw materials: 88 to 95 percent of alpha aluminum oxide, 2 to 4 percent of suzhou clay, 2 to 4 percent of talcum powder, 0.2 to 2 percent of calcium carbonate, 0.1 to 1.5 percent of strontium carbonate, and 0.2 to 1.5 percent of silicon dioxide. The method uses fluoride containing calcination alpha aluminum oxide powder together with five additives of the suzhou clay, the talcum powder, the calcium carbonate, the strontium carbonate, and the silicon dioxide which are mixed and ground evenly to prepare the micropore alumina ceramic pipe, so that the firing temperature of the ceramic piece is greatly reduced; and through exact formulation design, solid phase, liquid phase and gas phase are collocated reasonably, thus the prepared micropore ceramic piece not only has evenly distributed micropores and good mechanical strength, but also does not change the four good performances of the aluminum oxide.

Method for preparing porous ceramic filter membrane by low-temperature sintering

The invention discloses a method for preparing a porous ceramic filter membrane by low-temperature sintering. The method comprises the following steps: mixing and stirring ceramic aggregate particles, a sintering aid, deionized water, a dispersant and a defoamer, then carrying out vacuum pressure maintaining to remove a gas in the obtained filter membrane layer slurry; soaking a support body material in the filter membrane layer slurry, then obtaining a membrane layer on the support material by a pulling method, and then sintering at 700-1070 DEG C to obtain the porous ceramic filter membrane. According to the method, the porous ceramic membrane product which is high in strength, resistant to wear and corrosion, long in life and low in cost is obtained by optimally proportioning the sintering aid, the dispersant and the defoamer, preparing the ceramic membrane layer slurry system with high stability and proper viscosity, regulating the pulling method of the ceramic support body with a high porosity and a large hole diameter in the prefabricated membrane layer slurry system, thereby obtaining a uniform and asymmetrical porous ceramic membrane blank on the whole surface of a specified position of the support body material, and finally drying stage by stage and rapidly sintering at a low temperature of 1100 DEG C so as to obtain a porous ceramic filter membrane product with high intensity, abrasion resistance, corrosion resistance, long service life and low cost.

Preparation method of aluminum oxide microbeads

The invention discloses a preparation method of aluminum oxide microbeads. The preparation method comprises the following steps: by adopting aluminum oxide powder with lower alpha phase conversion rate (80-90%) as a main raw material, adding a composite sintering additive, ball-milling through an intermittent ball mill and a vertical sand mill, and then performing centrifugal type spray pelletization, rolling to forming, drying, sintering in a rotary kiln, and continuous grinding and polishing, to obtain the aluminum oxide microbeads. According to the preparation method, the aluminum oxide powder with relatively low alpha phase conversion rate is adopted, activity of the remaining gamma-aluminum oxide phase in the aluminum oxide powder promotes the sintering of the aluminum oxide, the addition amount of the sintering additive is decreased, and meanwhile the problem that the aluminum oxide microbeads during the sintering of the rotary kiln are caked and collided to be deformed due to excessive glass phase can be solved. Rotary kiln sintering equipment is introduced, the microbeads are under a moving status during the sintering of the rotary kiln, and are evenly heated during sintering, thus being uniform in the structure and performances. The prepared aluminum oxide microbeads have the characteristics of being low in abrasion, high in strength and density, uniform in particle size, free from breakage of beads, and the like.
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