10results about How to "Reduce sintering energy consumption" patented technology

The invention discloses a low-temperature sintering asymmetric porous silicon carbide ceramic membrane separation layer and a preparation method thereof, the preparation method comprises the following steps: a) preparation of a coating liquid: firstly dispersing a binder in a solution, adding silicon carbide particle powder, carrying out magnetic stirring dispersion for a period of time, then adding a dispersant, and stirring; then putting the stirred and mixed film coating liquid and the grinding balls into a ball milling tank for ball milling; and adjusting the pH value of the ball-milled silicon carbide coating liquid with ammonia water, and carrying out vacuum defoaming to finally obtain the high-stability and uniformly-dispersed silicon carbide coating liquid. Wherein the addition amount of the silicon carbide coarse particles is 0.5-50 wt% of the mass of silicon carbide; b) coating; c) drying; and d) sintering. The asymmetric porous silicon carbide ceramic membrane prepared by the method is low in sintering temperature, and the prepared separation layer membrane is controllable in pore size and uniform in pore size distribution; the method has excellent application prospects in the field of membrane separation.

The invention discloses a preparation method of a TPMS structural ceramic membrane with high air permeability. The TPMS structural ceramic membrane is prepared by taking the ceramic slurry as a raw material and adopting photocuring 3D printing forming and high-temperature sintering. A digital model of a TPMS structural ceramic membrane is constructed on the basis of a three-period TPMS structure, the ceramic membrane is composed of a TPMS porous structure supporting body and a thickness-controllable separation layer, and the TPMS structural supporting body prepared through 3D printing remarkably reduces the permeation resistance of the ceramic membrane through high porosity and low pore channel tortuosity of the TPMS structural supporting body. The TPMS structural ceramic membrane is formed at a time through photocuring 3D printing and formed through one-time sintering, the preparation period is effectively shortened, and sintering energy consumption is reduced. The prepared TPMS structural ceramic membrane is high in air permeability, uniform and controllable in pore structure and good in stability in a high-temperature environment, and an efficient material is provided for high-temperature gas dust removal.

The invention belongs to the technical field of sintering mixers, and particularly relates to an intelligent water adding control system and method for a sintering mixer. The system comprises a particle size online detection unit, a fuzzy control unit, a man-machine interaction display unit and a remote communication unit, the particle size online detection unit shoots an image of the mixture and performs image recognition to obtain a particle size distribution result of the mixture, and the fuzzy control unit controls the opening degree of the electric control valve according to the particle size distribution result. According to the control system and method, the water adding amount of the mixing machine can be accurately and intelligently adjusted in real time according to the target particle size range, the good mixing machine granulation effect is achieved, the air permeability of the mixture is guaranteed, the ultra-thick material layer sintering technology is achieved, the quality and strength of sintered ore are improved, and sintering energy consumption is reduced.

The invention belongs to the technical field of refractory materials, and discloses an aluminothermic reaction sintered alumina hollow sphere heat-insulating refractory material and a preparation method thereof. The aluminothermic reaction sintered aluminum oxide hollow sphere heat-insulating refractory material comprises the following raw materials in percentage by mass: 20-30% of aluminum oxide hollow spheres with the particle size of 3-5mm, 10-20% of aluminum oxide hollow spheres with the particle size of 1-3mm, 5-15% of aluminum oxide hollow spheres with the particle size of 0.1-1mm, 2-10% of light-burned magnesia, 20-30% of activated aluminum oxide powder, 15-25% of magnesium peroxide powder and 4-7% of metal aluminum powder, a binding agent accounting for 2-4% of the total mass of the raw materials is added. According to the refractory material, aluminum and magnesium peroxide are subjected to aluminothermic reaction and self-reaction sintering, a continuous spinel structure is formed on the surfaces of the matrix and the aluminum oxide hollow spheres, high strength is achieved through sintering at low temperature, and low thermal conductivity and high thermal shock stability are both considered.

The invention belongs to the technical field of electronic paste, and discloses low-temperature-coefficient resistance paste for a potentiometer and a preparation method of the low-temperature-coefficient resistance paste. The resistance paste is composed of a conductive phase, a glass phase and an organic carrier, the conductive phase is bismuth ruthenate nanowires and carbon-coated copper nanowires, the glass phase comprises Bi2O3, B2O3, SiO2 and La2O3, and the organic carrier is composed of ethyl cellulose and terpilenol. The preparation method comprises the following steps: respectively preparing the components, mixing in proportion, and rolling by a three-roller mill. The TCR value of a resistive layer formed by the paste is controlled to be + / -50 ppm / DEG C, the resistance change is lower than 0.8% after 1000 times of-55-125 DEG C cold and hot cycles, low-temperature sintering can be achieved, the silver migration resistance is excellent, the high-frequency insertion loss of the 3GHz frequency band is low, the sheet resistance uniformity is good, and the paste is suitable for the miniaturization, high precision and high-frequency scene requirements of high-end potentiometers.

A movable tunnel kiln with a flue gas re-burning system comprises a main body and a flue gas system, the main body comprises a drying section, a preheating section, a roasting section and a cooling section which are sequentially connected, and the flue gas system comprises a flue unit, a moisture removal unit and a desulfurizing tower. The flue gas system further comprises a flue gas re-burning unit, the flue gas re-burning unit comprises a flue gas re-burning main pipeline, a second fan, a smoke suction assembly and a smoke exhaust assembly, the second fan is communicated with the front portion and the rear portion of the flue gas re-burning main pipeline, and the front portion of the flue gas re-burning main pipeline is communicated with the smoke suction assembly. The method has the beneficial effects that firstly, the environment-friendly characteristic is improved; secondly, the emission reduction characteristic is improved; and thirdly, the energy consumption is reduced.

The utility model discloses a preheating and heat preservation type sinter material conveying device, which relates to the technical field of sintering equipment and comprises a preheating chamber, an apron conveying belt and a heat preservation mechanism. The preheating chamber is arranged on the outer side of the heat preservation mechanism, and the apron conveying belt runs in the heat preservation mechanism. The heat preservation mechanism comprises a heat preservation cavity, a heat preservation chamber and a hot air device, and the hot air device is communicated with a cavity of the heat preservation chamber. A plurality of heating plates are arranged in the preheating chamber, blanking channels are formed among the heating plates, material homogenizing plates are arranged below the preheating chamber, and a material homogenizing chamber is formed between every two adjacent material homogenizing plates. An outlet of the hot air device is connected with a hot air opening of the heat preservation chamber, an inlet of the hot air device is connected with the air blower and an air outlet of the heat preservation chamber, and the air outlet is formed above the hot air opening. By the adoption of the structure, the problems that an existing device is difficult to preheat sinter and material measuring is difficult to control are solved.

The invention belongs to the technical field of dielectric and pressure-sensitive materials, discloses dielectric and pressure-sensitive bifunctional ceramic and a preparation method thereof, and is used for solving the technical problem that the dielectric and pressure-sensitive bifunctional ceramic cannot have excellent dielectric constant, dielectric loss, breakdown field strength and nonlinear coefficient at the same time. The ceramic material is represented by (Y < 0.5 + x > Bi < 0.5-x >) < 2 / 3 > Cu3Ti4O12, wherein x is greater than or equal to-0.1 and less than or equal to 0.1. Yttrium oxide, bismuth oxide, copper acetate and titanium oxide are used as starting raw materials and mixed according to the chemical formula proportion, ethylenediamine is added, the mixture is stirred at the room temperature and then subjected to heat preservation for a certain time, ceramic powder is obtained, and the ceramic material is obtained after separation, cleaning, drying, tabletting and sintering. The dielectric constant of the prepared ceramic material at 10 kHz can reach 14250, the dielectric loss is as low as 0.017, the breakdown field strength reaches 17.8 kV / cm, and the nonlinear coefficient is 7.9. The ceramic material has important application prospects in the fields of high-capacity capacitors, high-energy density storage, piezoresistors and the like.

This invention discloses a nanoscale α-alumina and its preparation method. Polyethylene glycol, citric acid, and ammonium aluminum sulfate are sequentially added to a urea solution and mixed to obtain a mixed solution. Ammonia water is then added dropwise to the mixed solution, and the mixture is allowed to stand and age to obtain a precursor suspension. The precursor suspension is then separated into solid and liquid phases, and the resulting solid phase is the alumina precursor. The alumina precursor is then calcined to obtain α-alumina. The α-alumina provided by this invention is a pure phase, free of impurities such as γ-Al₂O₃, with a complete crystal structure, a particle size ≤150 nm, a particle size distribution CV value <15%, excellent dispersibility, no obvious hard agglomerates, and a higher specific surface area, making it suitable for applications in high-end electronic ceramics, precision polishing, and other fields.

The invention discloses a low-temperature sintered metal soldering paste and a preparation method and application thereof, and the preparation method comprises the following steps: A, adding a metal salt, a sintering aid and a reducing agent into a solvent, and reacting to obtain a low-temperature sintered metal suspension; wherein the low-temperature sintering metal suspension contains metal nanoparticles, and the sintering temperature of the metal nanoparticles is higher than 300 DEG C; b, concentrating the low-temperature sintered metal turbid liquid in a vacuum environment to obtain low-temperature sintered metal soldering paste; wherein the sintering temperature of the metal soldering paste sintered at the low temperature is 130-240 DEG C. According to the preparation method of the low-temperature sintered metal soldering paste, the preparation method is simple and high in operability, and the obtained metal soldering paste has high shear strength and conductivity on the premise that low-temperature sintering is achieved by adding the sintering aid into the formula.