66results about How to "Improve firing quality" patented technology

The invention relates to road silicate cement clinker and a preparation method thereof. The preparation method for the road silicate cement clinker comprises the following steps: grinding and roasting a cement raw material, wherein the cement raw material consists of the following substances in parts by weight: 50-85 parts of lime stones, 5-20 parts of steel slag powder, 5-15 parts of sandstones and 5-15 parts of coal ash. The preparation method can be used for recycling the steel slag, grinding the steel slag into powder after drying, and adopting the prepared steel slag powder as a cement production raw material to prepare road silicate cement clinker with low heat and high fracture resistance, so that the sintering quality of the clinker can be effectively improved after the steel slag powder is added. On the basis of meeting the technical requirements specified in the road silicate cement national standards, the road silicate cement clinker can be used for improving the fracture resistance and wear resistance of the cement, and lowering the hydration heat evolution and the dry shrinkage rate.

The invention is an energy-saving ceramic flame-resistant bearing firing plate, for solving the technical problem of making the glazed outside wall bricks fired by the same kiln have no obvious color difference but small deformation, thus improving the quality of finished products, and besides, for strengthening the intensity of bearing firing plate, reducing its breakage rate. For this, the invention fills ribs and blanks at the bottom of the bearing firing plate, where a through hole is equipped within each blank. The blanks and holes can be regularly shaped or irregularly shaped. The invention is mainly used in ceramic kiln to bear and transport the fired ceramic blanks in the course of firing and especially applied to the glazed outside wall blanks.

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 invention provides a control method for firing high-performance quartz ceramic, which comprises the following steps: selecting high-purity (higher than 99.00%) quartz sand with reasonable grain size distribution, adding water, carrying out ball milling, homogenizing, adding the other two raw materials, carrying out secondary grain size distribution, stirring to injecting dynamic slurry into a mold, curing, and firing in a batch type kiln or progressive kiln through a six-step method, including low temperature stage, oxidative decomposition and crystal form transition stage, re-oxidative decomposition and firing stage, high temperature holding stage, cooling stage and recooling stage, thereby obtaining the high-performance quartz ceramic. The firing method provided by the invention saves the energy, promotes the development and utilization of high-performance quartz ceramic raw materials and natural gas, and effectively controls the firing temperature curve of the high-performance quartz ceramic; and the fired quartz ceramic has the advantages of uniform internal structure, excellent thermal shock stability and excellent rupture resistance. The operating process is stable, and implements low-carbon low-pollution emissions.

The invention provides an isostatic pressing electrical porcelain blank formula with non-plasticity clay used as raw material. The formula comprises the following components, by weight, 48%-55% of alumina, 18%-25% of feldspar flux, 15%-25% of calcined clay and 5%-15% of viscous agents. The formula takes chemically-synthesized viscous agents as viscous materials to replace plastic clay used in existing ingredients. Therefore, the non-plasticity clay can be used to replace scarce plastic clay raw materials. The cost of blank materials is reduced. The dependence of isostatic pressing electrical porcelain blanks on one-off resources is reduced.

The invention relates to a graphite heater furnace, in particular to a graphite heater furnace with multiple levels of graphite heating bodies of heating rods which are arranged in the horizontal direction inside a heating space part of a furnace body and capable of forming uniform temperature distribution on a burned object and improving the burning quality of the burned object. In order to realize the purpose, the graphite heater furnace comprises a housing, a furnace body which is arranged inside the housing and composted of an insulation body and graphite heating body which is arranged in a heating space part inside the furnace body and can produce heat, wherein the graphite heating bodies are horizontally arranged and distributed in multiple levels, the burned object is arranged on the heating rods in the heating space part inside the furnace body, and the outer periphery of the furnace body is provided with a cooling water trough.

The invention discloses an intelligent optimization method for temperature control of a ceramic kiln. The intelligent optimization method comprises the following specific steps that step (1), during each firing process, a kiln controller performs PID control on the kiln temperature according to the set kiln temperature control curve through a PID control module; step (2), after each completion offiring, the kiln controller transmits the actual temperature data in the kiln to a PC through wireless communication; step (3), the ceramic firing result is scored and evaluated by a firing technician, and the score is input into the PC and forms a sample with the actual temperature data; step (4), the PC optimizes the kiln temperature curve according to the samples through the genetic algorithm;and step (5), the optimized temperature control curve is transmitted by the PC through wireless communication to the kiln controller for control of the next ceramic firing process. The intelligent optimization method achieves the effect of improving the quality of ceramic firing by optimizing the kiln temperature control curve.

The invention discloses a formula of a wet-method high-strength electrical porcelain blank. According to the formula, the high-strength electrical porcelain blank comprises the following components in percentage by weight: 35%-40% of alumina, 5%-10% of feldspar solvent, 30%-40% of kaolin and10%-20% of illite clay. As high plastic clays such as kaolin and illite clay are adopted in the formula, the wet blank strength of the formula is improved, the formability of the formula is enhanced, the process property of an electrical porcelain blank is excellent, the preparation cost is reduced, the formula can meet the production demands of an overall formed product which is higher than 3 meters, and the phenomenon such as falling caused by poor plasticity of the blank formula during fettling can be reduced.

The invention relates to a cement clinker employing a silica sand part instead of sandstone. The cement clinker is prepared from the following raw materials in parts by weight: 87-90% of limestone, 2.7-3.0% of alumina red mud and 6-9% of silica sand, sandstone and construction waste rocks, wherein the mass ratio of the silica sand to the sandstone to the construction waste rocks is 1:3:1. A technology specifically comprises the following steps of carrying out burdening, homogenizing, grinding, powder selecting, preheating and decomposing, and finally carrying out high-temperature calcination and then cooling to obtain the cement clinker. By adopting the scheme of replacing the sandstone with the silica sand part to produce the cement clinker, the grindability of raw meal mill is improved; meanwhile, a lot of industrial waste silica sand and construction waste rocks are consumed, so that effective utilization of resources is achieved; the firing quality of the clinker is improved, the firing energy consumption of the clinker is further reduced and the production cost.

The invention provides a novel firewood-coal-electricity integrated high-temperature equipment for ceramic firing. The novel firewood-coal-electricity integrated high-temperature equipment for ceramic firing comprises an electric-control high-temperature furnace and a firewood-coal combustion furnace. The electric-control high-temperature furnace communicated with the firewood-coal combustion furnace through a smoke channel. The electric-control high-temperature furnace is located above the firewood-coal combustion furnace and used for providing the temperature required for ceramic firing. The firewood-coal combustion furnace is used for providing reductive gas required for ceramic firing. An ash pond is arranged below the firewood-coal combustion furnace. The novel firewood-coal-electricity integrated high-temperature equipment for ceramic firing has the beneficial effects that when the firewood-coal-electricity integrated high-temperature equipment is used for ceramic firing, a green body to be fired is placed in a hearth of the electric-control high-temperature furnace, a temperature source is provided by the electric-control high-temperature furnace, an atmosphere source (the reductive gas) is provided by the firewood-coal combustion furnace, the atmosphere source provided by the firewood-coal combustion furnace enters the hearth of the electric-control high-temperature furnace through the smoke channel and air holes, and the ceramic firing quality is greatly improved.

The invention discloses a dry-process cement preheating decomposition system. The dry-process cement preheating decomposition system comprises a decomposition furnace, wherein a decomposition assisting mechanism is arranged on one side of the decomposition furnace; a pulverized coal burner is arranged at the lower end of the decomposition furnace; a dilution cooler is arranged on one side of the pulverized coal burner; a dilution air blower is connected to one side of the dilution cooler; the upper end of the dilution cooler is connected with a cyclone separator; the upper end of the cyclone separator is connected with dechlorination equipment, one side of the dechlorination equipment is connected with a dust collector; one side of the dust collector is connected with an induced draft fan; and a rotary kiln is further arranged on one side of the pulverized coal burner. The system can be used for treating harmful gas (dioxin) in the household garbage incineration process in a dry-process cement preheating decomposition system.

A dental furnace for firing dental-ceramic compounds comprises a firing chamber for receiving ceramic elements to be fired. Further, a heating device for heating and firing the ceramic element is provided. The heating device comprises at least one heating element for producing IR radiation in the range of 0.8-5 μm.

The invention discloses an energy-saving device capable of preheating coal gas on a ceramic kiln. The ceramic kiln sequentially comprises a single-layer or multilayer drying area and a single-layer preheating area. A cold coal gas pipe which extends transversely is arranged above the single-layer or multilayer drying area and the single-layer preheating area. A gas inlet manifold for cold coal gas is arranged above drying boxes at the head of the single-layer or multilayer drying area and is perpendicularly connected with the cold coal gas pipe. The lower part of the gas inlet manifold transversely enters the internal top of a drying box at the head of the single-layer drying area, or transverse branches of the gas inlet manifold enter internal tops of drying boxes at the head of each layer of the multilayer drying area. A plurality of coal gas preheating pipes are perpendicularly arranged at all sections of the gas inlet manifold in each initial drying box. A primary output pipe for preheated coal gas is arranged above drying boxes at the tail of the single-layer or multilayer drying area. A secondary output pipe for the preheated coal gas is arranged above a drying box at one position of the preheating area and is perpendicularly connected with an output manifold. The lower part of the secondary output pipe is connected with the preheating pipes which enter the preheating box at the position. By adopting the structure, a good energy-saving effect can be realized and the sintering quality of ceramic products can be effectively improved.

The invention discloses a heat exchange chamber-type energy saving shuttle kiln, comprising a kiln body 1; a furnace wall 3 is arranged on the periphery of the kiln body 1, a kiln door 2 is arranged on one side surface of the kiln body, an air exchange opening 12 is arranged opposite to the kiln door 2, the air exchange opening 12 is connected to a heat exchange chamber 11, the heat exchange chamber-type energy saving shuttle kiln is characterized in that heat exchange ceramic tubes 10 are arranged in the heat exchange chamber 11, the top of the heat exchange chamber 11 is provided with a blower 7, the side surface of the heat exchange chamber 11 is provided with a draught fan 8 connected to a chimney 9, the bottom of the kiln body 1 is provided with a burning opening 6, the burning opening 6 is connected to a gas supply pipeline by a fuel gas pipeline 5, and the bottom of the kiln body 1 is provided with a combustion air pipeline 4. The heat exchange chamber-type energy saving shuttlekiln solves the problem of massive discharge of waste heat of the chimney, when the kiln is burnt to 1600 DEG C, the temperature of the chimney is reduced to the temperature smaller than 140 DEG C from the original temperature larger than 1000 DEG C, preheating discharge is obviously reduced, environmental influence and energy waste are reduced, fuel gas is saved by about 30%, and the energy saving and emission reduction are realized truly. A temperature difference in the kiln is reduced to improve the product sintering quality, and the rate of finished products is as high as 99%.

The invention discloses an admixture for dry-process cement kiln clinker production, and belongs to the technical field of building material admixtures. The admixture disclosed by the invention is prepared from the following raw materials in parts by weight: 3-10% of rare earth, 20-40% of fluorite, 3-10% of nano metal powder, 30-60% of gypsum, 5-10% of modified steel slag powder and 1-5% of glycerol. The rare elements are hybridized and doped in clinker combustion, so that the eutectic point can be reduced, and the effects of destroying the crystal structure and improving the activity of the clinker are achieved. Fluorite and gypsum are added to achieve a mineralization effect, and metal nano powder is doped to catalyze clinker combustion, so that the firing speed is increased. The nano metal powder and the modified steel slag are matched with each other, so that efficient combustion of the clinker is jointly realized. The additive disclosed by the invention is 0.6-1% in doping amount,can remarkably improve the yield of a raw mill, improve the strength of clinker, fix sulfur and denitrate, comprehensively reduce the cost and realize efficient reutilization of waste resources, andhas wide economic benefits and social benefits.

The invention relates to a replacement chamber sealing apparatus for an electronic material firing furnace, and belongs to the technical field of an electronic kiln. The electronic material firing furnace comprises a furnace body, an inlet gas chamber box body, a left replacement chamber and a right replacement chamber; the inlet gas chamber box body is connected with the furnace body and is communicated with a hearth; the left replacement chamber is formed corresponding to a position of a cavity port of the inlet gas chamber box body and is communicated with the inlet gas chamber box body; the right replacement chamber is formed corresponding to a position of a left replacement chamber inlet of the left replacement chamber and is communicated with the left replacement chamber; the replacement chamber sealing apparatus comprises a replacement chamber door box; a replacement chamber lifting mechanism is arranged in the replacement chamber door box; and the replacement chamber sealing apparatus is characterized by further comprising a replacement chamber door external force application mechanism which is arranged at the front side or the rear side of the replacement chamber door box and is matched with one side of a replacement chamber door, which is back to a doorframe sealing ring. The replacement chamber sealing apparatus has a good sealing effect, ensures a vacuumizing effect, saves protection gas filled into the inlet gas chamber box body and the left and right replacement chambers and ensures atmosphere balance, and firing quality of an electronic material is improved.

The present invention discloses a rotary kiln and method for producing calcined color frit therewith. The rotary kiln includes inclined lined cylinder with material feeding port in the head, drive system, flue with chimney, temperature metering unit inside the cylinder, heat source in the tail and discharge port in the tail. During production, the mixed raw material is fed to the inner hearth and rolled from head to tail while the cylinder is rotated and the high temperature gas flows from tail to head, so that the material is preheated and high temperature calcined to become color frit, which is discharged from the tail and cooled. The present invention has high yield and low cost.

The invention discloses a method for automatically adjusting an air door of a ceramic kiln. The method comprises the following steps that firstly, a collected temperature value is converted into a current value through a thermocouple temperature sensor, the current value is input into a kiln controller, an AD conversion module in the controller converts a current analog signal into a digital signal, an actual temperature in the kiln is obtained through checking a thermometer, a temperature rising stage, a heat preservation stage and a cooling stage of ceramic firing are judged, and an instruction for adjusting an opening degree of the air door is sent out; according to the instruction, switching value is output by a one-way switching value output circuit of a switching value output module,then signal amplification is carried out through a circuit driving module, the amplified signal is transmitted to an electric push rod through a relay switch, high-low electrical levels of the outputswitching value determine whether the electric push rod ascends or descends, output time of the high-low electrical levels of the output switching value determines a distance of ascending or descending the electric push rod, therefore the opening degree of the air door of the ceramic kiln is adjusted, and finally, the oxidation atmosphere in the ceramic kiln is adjusted. According to the method,the stability of the ceramic firing quality is improved, and the labor intensity of firing workers is reduced.