203results about How to "Shorten firing time" patented technology

The invention relates to a low-temperature fast-fired ceramic tile and a production process thereof. The blank material of the ceramic tile comprises at least one selected from the group consisting of fine granules produced during grinding and polishing in production of polished tiles, fine granule-containing waste water collected after polishing and a waste polishing material obtained after deposition and press filtration; the blank material of the ceramic tile is composed of, by weight, 48 to 73% of the waste polishing material, 5 to 20% of porcelain sand, 20 to 27% of clay and 2 to 5% of a mineralizer. The production process comprises the following steps: (1) collecting the waste polishing material, carrying out batching according to a formula and then carrying out wet ball milling so as to obtain slurry, wherein the waste polishing material stood for subsequent usage in press filtration and other raw materials are calculated on a dry basis; (2) subjecting the slurry to spray drying so as to obtain powder and carrying out dry-pressing so as to form a ceramic adobe; (3) drying the adobe, glazing the adobe and carrying out surface decoration; and (4) putting a decorated blank into a ceramic roller kiln for firing, wherein fast firing temperature is 1050 to 1140 DEG C, a firing period is 35 to 75 min, and the ceramic tile with a water absorption rate of less than 0.5% is sintered.

The invention discloses a single-layer glazed transmutation brick and a preparation method thereof and relates to production of architectural ceramic glazed bricks. The method comprises the following steps: (1) preparation of green body slurry; (2) preparation of a glazing material; (3) forming and biscuit firing of a green body; (4) glazing of the green body; (5) firing of the transmutation brick. The glazed green body is fired in a kiln after drying and is subjected to a transmutation reaction through two times of temperature increasing and decreasing, and the single-layer glazed transmutation brick is obtained. The method has the advantages as follows: firstly, the problem about combination of the green body and glaze is solved, the product qualification rate is increased, and the method is suitable for large-scale production; secondly, a ground coat and cover glaze are combined into single glaze layer, a glazing process is simplified, color difference caused by different thickness of the ground coat and the cover glaze is avoided, and the brick can adapt to large-area paving for architectural decoration; thirdly, the firing temperature and firing time for the transmutation glaze are reduced, energy is saved, and consumption is reduced; fourthly, through optimization of a green body formula and a firing process, the brick is magnetized while is not hardened too much, and construction cutting is facilitated.

The technological process of producing polished super thin ceramic tile with waste ceramic material includes the following steps: superfine treating the waste ceramic material and other material; drying the superfine powder; forming, baking and polishing. The present invention has the beneficial technological effects of no special requirement on the material, and the superfine processing of the material resulting in fast heat transferring speed in the baking course, short baking period and lowered power consumption. The present invention solves corresponding environment pollution problem.

The present invention relates to a process for producing ultrathin ceramic tile, said process includes the following steps: making the raw material for producing ceramic tile undergo the process of ultramicrorefining treatment by means of ultrafniing equipment, drying ultramicrorefined powder body press-moulding the dried powder body, firing and polishing so as to obtain the invented finished product.

The purpose of the invention is to provide a preparation method of a black pottery artware. First, blank material yellow clay is selected, and processes of crushing, deposition, mud extruding, and fermentation are carried out on the yellow clay to obtain black pottery mud. Then, moulding processing is carried out on the black pottery raw material, and after the processes of shade drying, shape modification, polishing, painting, engraving, polishing once again and shade drying are carried out on an unburned earthenware body, surface treatment is carried out on the unburned earthenware body. Finally, the unburned earthenware body is put into a kiln special for black pottery sintering to carry out sintering, and the sintering process comprises preheating, heating, cooling, smoke drawing, kiln closing, and kiln moistening. In sintering, both the surface and the interior of the unburned earthenware body of the black pottery artware sintered in the invention can be carbonized uniformly, and present a black color. Fine channels favor the penetration of soot, so that the black pottery artware is pitch black and bright from inside to outside, has a natural, smooth, and non-fading color, and has no peculiar smell of asphalt or impurities. In addition, the preparation method of the invention has short sintering time, and saves both energy and labor.

The invention belongs to the technical field of refractory materials, especially refractory materials for nonferrous smelting, and especially relates a copper composite high-performance magnesia-chrome brick and a manufacturing method thereof. The brick comprises 1-10 wt% of copper composite magnesia-chrome synthetic sands with the particle size being 3-5 mm, 10-35 wt% of copper composite magnesia-chrome synthetic sands with the particle size being 1-3 mm, 10-25 wt% of copper composite magnesia-chrome synthetic sands with the particle size being 0.088-1 mm, 1-5 wt% of fused magnesia-chrome sands with the particle size being 3-5 mm, 1-15 wt% of fused magnesia-chrome sands with the particle size being 1-3 mm, 2-13 wt% of fused magnesia-chrome sands with the particle size being 0.088-1 mm, 5-20 wt% of fused magnesia-chrome sands with the particle size being not more than 0.088 mm, 1-5 wt% of fused magnesia with the particle size being 3-5 mm, 1-15 wt% of fused magnesia with the particle size being 1-3 mm, 2-13 wt% of fused magnesia with the particle size being 0.088-1 mm, 5-20 wt% of fused magnesia with the particle size being not more than 0.088 mm, 2-10 wt% of chromium concentrate with the particle size being not more than 0.088 mm, 1-6 wt% of a composite additive and 3-5 wt% of an (externally added) binder. Magnesia-chrome brick wastes generated by the nonferrous smelting can be fully used reasonably and effectively in the invention.

A porcelain grey tile without carburization and a sintering method thereof. Bauxite, purple sand, clay, and gas stove coal cinder are mixed, added with water to prepare a green body, and then the porcelain grey tile without carburization is sintered under a certain temperature condition. According to the invention, a mixture of multiple materials is used instead of pure clay for sintering, which saves clay resources; the green body does not crack when a lot of water is lost within a short period, which greatly shortens the drying time of the green body; during high temperature sintering, carbon particles are generated in raw coal reactions of generator gas and gas stove coal cinder, and colorize the inner and outer sides of the green body, which omits the colorization and color preservation processes in the prior art, shortens the process flow, increases the sintering efficiency, and saves energy.

The invention belongs to the technical field of resource utilization of solid wastes, and particularly relates to a method for resource utilization of cobalt smelting waste slag. The invention provides the method for preparing foamed ceramic by microwave sintering of the cobalt smelting waste slag. The method comprises the following steps: carrying out proportioning by using the cobalt smelting waste slag, filler, a liquid phase agent, a plasticizer and a foaming agent, carrying out grinding, mixing, granulating, and mold pressing or mold powder accumulation to prepare a green body; and carrying out microwave sintering to prepare the foamed ceramic. The microwave heating method is adopted, and compared with a conventional electric heating or fuel heating mode, the microwave heating methodhas the advantages that the foaming temperature is greatly reduced, the foaming time is shortened, and therefore energy consumption is greatly reduced. According to the method, the problems of high energy consumption in existing formed ceramic industry and high additional value comprehensive utilization of the cobalt smelting waste slag are solved.

The invention relates to an air brick fired at low temperature by using a gel and a preparation process of the air brick. The raw materials of the air brick include an aggregate and a fine powder, wherein the weight ratio of the aggregate to the fine powder is 6.5:3.5-7:3; the alumina gel fine powder is used as a binding agent; due to the addition of the alumina gel particle having quite high chemical activity into the air brick in the firing process of the air brick at the temperature being lower than 800 DEG C, the air brick body has high strength; the addition of chromium sesquioxide fine powder can effectively improve the capacities of resisting the permeability of molten steel and the erosion by the steel slag in the use process of the air brick, so as to ensure the good application performance of the air brick; and the firing temperature of the air brick provided by the invention is controlled at 500-800 DEG C, but the firing temperature of a traditional air brick is generally higher than 1300 DEG C, and therefore, the cost of the fuel gas can be saved by about 60% and the firing time can be shortened by about 50%.

The invention relates to the technical field of a refractory material and specifically relates to a preparation method for a heat-insulating type compact silicon brick. The quartz is modified with peach gum under the effect of microorganisms and the macromolecular monosaccharide decomposed from the peach gum is grafted onto the rock wool surface, so that the adhesiveness of the quartz and the rockwool is promoted; the mineralizing agents, including silicon nitride, ferroferric oxide, calcium oxide and aluminum oxide, are added, so that the transformation of the quartz can be accelerated, thesintering temperature is reduced, the sintering time is shortened, the silicon brick interior is effectively filled, a heat-insulating effect is achieved and the compactness and the heat insulation ofthe silicon brick are promoted; the ethyl orthosilicate, hydrochloric acid, absolute ethyl alcohol and deionized water are mixed and reacted for generating a self-prepared silica sol; a silane coupling agent KH-560 is used for modifying the self-prepared silica sol, so that the silicon dioxide is effectively filled into the silicon brick, the surface property and the reaction activity can be effectively improved, the porosity of the silicon brick can be reduced, the compactness and the heat insulation of the silicon brick can be further promoted and the application prospect is wide.

The invention provides a method for preparing high-purity tabular corundum with low energy consumption. The method comprises the following steps of: adding an additive to industrial alumina powder serving as raw material, wherein the additive is composed of boric acid and aluminum fluoride according to a mass ratio being 0.5-1.5:1 and is used for removing impurities out of alumina powder; mixing and grinding, adding hydroxypropyl methyl cellulose and water and preparing into blank balls; loading the blank balls into a drying chamber at the top of a high-temperature shaft kiln so that the blank balls are dried with hot air pumped out from the bottom of the high-temperature shaft kiln; conveying the dried blank balls into a firing chamber of the high-temperature shaft kiln, keeping the temperature at 1930-1970 DEG C for 40-60 minutes, then cooling to 90-120 DEG C in a cooling chamber and discharging from the shaft kiln; crushing, screening, removing iron and packaging to finally obtain tabular corundum in which mass content of alumina is 99.4-99.6%. The high-purity tabular corundum is fired at a high temperature quickly, the impurity removing effect of the additive is strengthened, the purity of the product is improved, the crystallization of the tabular corundum is promoted, the firing energy consumption is reduced to the greatest extent, and the preparation cost of the tabularcorundum is reduced further.

Provided is a shuttle kiln capable of sintering a ceramic porous body containing an organic binder at a shorter time than before and without creating cuts caused by the temperature difference between the inside and the outside. This shuttle kiln is suitable for sintering a ceramic porous body containing an organic binder. The shuttle kiln is provided with a gas suction path (4) for sucking the gas in a furnace and discharging said gas via an afterburner (5), and a circulation path (7) for burning an organic binder gas by sucking the gas in the furnace and discharging said gas to the outside of the furnace and for returning the gas back into the furnace.

The invention relates to a method for preparing a cobalt blue material for decorating ceramic. In the method, industrial pure chemical raw materials are adopted; and the method comprises the following steps of: mixing 22 to 45 weight percent of cobalt sesquioxide, 48 to 70 weight percent of aluminum sesquioxide, 0 to 10 weight percent of zinc oxide, 0 to 10 weight percent of magnesium carbonate and 0 to 4 weight percent of chromium sesquioxide; adding 2 to 4 weight percent of boric acid and 6 to 10 weight percent of nucleating agent and uniformly mixing to obtain a reactant; adding acetone in an amount which is 80 percent based on the weight of the reactant; and performing quick ball-milling, drying, baking at the temperature of between 1,100 and 1,200 DEG C, preserving heat, naturally cooling, grinding, cleaning and sieving to obtain the color material. In the method, a large amount of nucleating agent with a small grain size is added into the solid-phase reactant in advance to ensure that crystal simultaneously grows in and on the surface of the reactant, so the grain size of the color material is controlled well, the crystallization completeness is improved, the solid-phase firing temperature is reduced, the firing time is shortened, the acid resistance of the color material is enhanced, and the defects of the conventional solid-phase method for preparing the ceramic color material are overcome.

The invention discloses a method for preparing corundum abrasive by microwave sintering, and belongs to the technical field of abrasive preparation. The corundum abrasive comprises the following raw materials in percentage by weight: 95-98% of Al2O3, 0.5-2.5% of SiO2, 0.5-1% of MgO, 0.2-1% of TiO2, 0.2-1% of MnO2, and 0.1-1% of CuO. The method comprises the following steps: mixing the raw materials; molding; crushing; sieving; grading; performing rubber removing; transferring the rubber-removed blank particles into an SiC crucible; increasing the temperature to reach 1300-1500 DEG C at the rate of 10-20 DEG C per minute; then maintaining the temperature for 5-30min, and performing microwave sintering to obtain the corundum abrasive. With the adoption of the method, energy consumption of the corundum abrasive production can be greatly decreased; in addition, the blank particles are in contact with each other, so that the clearances among the particles are small, the temperature gradient of a sintered body can be reduced, the sintering time is greatly decreased, and as a result, the corundum abrasive sintering quality can be improved.

The present invention discloses a light insulating brick. The light insulating brick is prepared from the following main raw materials: 50% to 76% of industrial cinder, 6% to 20% of mud, 4% to 20% of potassium feldspar, 4% to 20% of albite, 4% to 20% of quartz and 0 to 15% of polished residues. According to the light insulating brick, the industrial cinder is taken as a main formula body, and the addition is more than 50%; and moreover, the whole sintering time of the light insulating brick is controlled within 4-7 hours. The prepared light insulating brick is rigid in texture, low in specific gravity and high in porosity, and the refractory temperature is over 1000 DEG C, so that conventional fire can be resisted easily; and the light insulating brick is low in heat conductivity and high in compressive strength, and is very suitable for heat insulation of outer walls and indoor heat insulation and sound insulation.

The invention relates to a formula for producing a post porcelain insulator by using industrial alumina powder instead of high-quality alumina powder by a dry method and a preparation method and application thereof, and belongs to the technical field of insulators. The formula for producing the post porcelain insulator by using the industrial alumina powder instead of the high-quality alumina powder in the dry method comprises, by weight, 12-16% of the industrial alumina powder, 28-36% of kaolin, 28-36% of flux mineral, 18-22% of elutriation soil, 0.5-3% of an additional mineralizer and 0.15-0.4% of a dispersant, wherein the mineralizer is one or more of barium salt, magnesium salt or talc. By the adoption of the formula for producing the post porcelain insulator by using the industrial alumina powder instead of the high-quality alumina powder by the dry method, the design is simple and scientific; a prepared product has small intensity dispersibility and high intensity; a formed blankis uniform in density and low in internal stress; and meanwhile, the invention provides the simple and convenient preparation method and application.