110results about How to "Low loss on ignition" patented technology

The invention relates to a white fast-setting, fast-hardening and high-belite sulphoaluminate cement clinker, and also relates to an application and a production technology thereof. The mineral component of the cement clinker comprises 0.5-4.6% of f-CaO; the chemical component of the cement clinker comprises 12.9-16.1wt% of SiO2, 12-19wt% of Al2O3, 0.15-1.0wt% of Fe2O3, 49-53wt% of CaO and 12-18.5wt% of SO3; and the clinker rate range Cm is 1.01-1.137, and P is 0.62-1.44. The clinker is produced through calcining 30-50wt% of limestone, 26-46wt% of slag powder and 21.1-40wt% of desulfurized gypsum in a rotary kiln at 1250-1350DEG C. 26-97% Of the clinker, 3-19% of anhydrite and 0-55% of the slag powder, or 5-25% of the clinker, 14.4-19.0% of the anhydrite and 55.8-79% of the slag powder are mixed and ground to form white fast-setting, fast-hardening and high-belite sulphoaluminate cement and high-late strength and high-belite sulphoaluminate cement.

The invention provides a method for recycling waste clay, which comprises the following steps of: removing impurities from construction waste materials through treatment processes such as crushing, impurity removal, iron removal, sieving and the like, and preparing the materials into a recycled aggregate meeting the requirement of grinding equipment on particle size; burning up combustibles in the recycled aggregate through a calcining process to reduce ignition loss and water content; separating a concrete component from a clay brick component in the recycled aggregate; and grinding the clay brick component to obtain regenerated powder. By the method, waste clay brick resources can be fully utilized by a simple process; moreover, the regenerated clay powder obtained in the production has good performance, wide application range and high added value.

The invention relates to an automatically control system of activated carbon preparing course, and its characteristic: according to the technical parameter signals collected by detecting components and a fixed program, the computer in the control system drives the air quantity regulating valve of carbonization furnace air supply system, the electric regulating value of activation furnace, the electric steam value of activation furnace, the discharging valve of activation furnace and the air and fume gate to implement the automatic control of the temperature of carbonization furnace, the temperature of activation furnace, the steam flow of activation furnace, the activating time, and the mutual conversion between heating and cooling of two half-furnaces. It avoids the liberty of artificial control, replaces artificial and experiential control method with scientific and programmed control method, and effectively controls the conditions of carbonization and activation in producing course, reduces loss rate by burning, etc.

The invention relates to a method for manufacturing a glazed brick by utilizing silico-calcium slag, belonging to the technical field of ceramic manufacture. The glazed brick comprises the following raw materials in percentage by weight: 5%-40% of the silico-calcium slag, 0%-10% of Dongsheng clays and 50%-95% of bamboo partridge tower clays. Due to the adoption of the invention, the shortage crisis of raw mineral materials is weakened and the discharge of the silico-calcium slag is reduced, and an energy-saving type ceramic product is produced; the production energy consumption of ceramics can be reduced and the utilization efficiency of resources is enhanced by preparing low-temperature glaze materials adapted to calcium silicate because the firing temperature of a blank body is reduced through the calcium silicate contained in the silico-calcium slag; the invention not only reduces the pollution, but also increases a new member for building materials; and in addition, the novel glazed brick prepared by using the method has various properties which all accord with or surpass the national standard.

The invention discloses a compression-resistant, abrasion-resistant and corrosion-resistant transformer seal ring as well as a production method thereof. Chemigum is adopted as a main raw material, and forms synthetic rubber with high-tenacity reclaimed rubber and coumarone resin, and the synthetic rubber has extremely good oil resistance, abrasion resistance and thermal resistance; the synthetic rubber is matched with carbon black, ceramic micro powder, silicon powder, manganese powder, teflon, zinc oxide, argil, vulcanizing activators and hot-oxygen aging resistant agents, so that the performance of tearing resistance, self-lubricating effect, compression deformation resistance, thermal resistance, corrosion resistance, abrasion resistance and the like of the seal ring can be improved effectively, and the service life of the seal ring is prolonged. The favorable seal effect can be protected in severe cold and hot climate environments, and the service life of the seal ring is more than twice that of a traditional seal ring.

The invention relates to a preparation method of high specific surface area titanium dioxide for a denitration catalyst. The preparation method comprises the following steps: (1) taking concentrated titanium liquid in the sulfuric acid method titanium dioxide production process as the raw material, adding a seed crystal, and carrying out pressurized hydrolysis to obtain meta-titanic acid with a high specific surface area; (2) washing the obtained meta-titanic acid for the first time, bleaching the meta-titanic acid, washing the meta-titanic acid for a second time, beating qualified meta-titanic acid after water washing, and controlling the concentration (calculated by titanium dioxide) to be in a range of 120 to 200 g/L; (3) adding an alkaline substance into the meta-titanic acid slurry obtained in the step (2) under stirring so as to adjust the pH value of the slurry to a range of 6.5 to 7.5; (4) subjecting the slurry obtained in the step (3) to aging, which lasts for 30 to 60 minutes, carrying out suction filtration in a vacuum suction device, and washing the filter cake by water, wherein the solid content of filter cake is more than 35%; (5) placing the filter cake obtained in the step (4) in an electric oven to dry the filter cake, wherein the temperature is controlled in a range of 105 to 150 DEG C, and the drying time lasts for 10 to 20 hours; and (6) grinding the material obtained in the step (5) by a high speed grinding machine to obtain the high specific surface area titanium dioxide.

The invention discloses sanitary ceramics slip and a preparation technology thereof. The sanitary ceramics slip mainly comprises, by weight, 30-70 parts of illite-structure clay, 5-15 parts of kaolin, 6-14 parts of ball clay, 8-13 parts of potassium feldspar, 5-10 parts of pyrophyllite, 5-10 parts of sericite, 0.1-3 parts of dolomite and 40-45 parts of water. Sanitary ceramics prepared from the sanitary ceramics slip are low in firing temperature, little in energy consumption and high in strength, and slip casting qualified rate, semi-finished product qualified rate and firing qualified rate can reach 98%, 96% and 92% respectively.

The invention provides a preparation method of low-fluorine high-purity tantalic oxide, which comprises the following steps: preparing high-purity tantalic liquid from impure tantalic liquid materials by adopting a liquid-liquid extraction method; neutralizing the high-purity tantalic liquid by purified ammonia to obtain high-purity tantalum hydroxide which is then washed, filtered, dried; sectionally calcining the high-purity tantalum hydroxide according to the following steps: heating to 180-230 DEG C, and carrying out heat preservation for 2-3 hours; heating to 480-530 DEG C, and carrying out heat preservation for 4-6 hours; heating to 620-680 DEG C, and carrying out heat preservation for 2-3 hours; heating to 790-840 DEG C, and carrying out heat preservation for 3-5 hours; reducing temperature to 180-230 DEG C, and then discharging the high-purity tantalum hydroxide from a furnace and screening to obtain the high-purity tantalic oxide. The invention has the advantages that the prepared high-purity tantalic oxide product has good consistency and evenness, low fluorine content, less ignition loss and protection function to a furnace hearth, and the service life of a roasting hearth can be prolonged.

The invention provides modified active carbon, and a preparation method and application thereof, belonging to the field of preparation of catalyst carriers. The preparation method comprises the following steps: subjecting graphitized active carbon to treatment with HNO3 and then carrying out high-heat treatment in an ammonia gas atmosphere so as to obtain an active carbon carrier with high mesoporosity. The carrier has the characteristics of a great pore volume, high mesoporosity (no less than 97%), good conductivity, etc. When used as a carrier for an ammonia-synthesis catalyst, the carrier can substantially improve the dispersity of the precious metal ruthenium and improves anti-methanation capability, heat stability and activity of the catalyst. The carrier has wide application prospect in the field of catalysis.

The invention relates to a production formula for alkali-resistant glass marble in building material industry, a production method and a production kiln thereof. The invention is reasonable in selecting weight proportions of ingredients, which is favorable for the control of quality system, and the produced finished product of the glass marble has high clarity and good quality; the entire technological process consists of screening, weighting and mixing raw materials, founding and discharging, the technology is simple and the operation is convenient; using a horseshoe-fired furnace for producing the alkali-resistant glass marble solves the technical prejudice in a long term that the horseshoe-fired furnace is unsuitable for the production of the alkali-resistant glass marble; a general glass marble kiln is utilized to realize the production of the alkali-resistant glass marble without improving kiln refractory, which has the advantages of large production scale, easy control and regulation for the production process, good scale effect and prominent energy-saving effect; the cost is dramatically reduced while the production rate is greatly improved in contrast to a full-electric melting kiln.

The invention relates to a polyvinyl acetate oxotitanium precursor sol spinning solution and a preparation method of a titanium oxide nano fiber photocatalyst. The preparation method comprises the following steps: preparing a polyvinyl acetate oxotitanium precursor sol spinning solution, electrostatically spinning, and thermally treating; to be specific, tetrabutyl titanate and glacial acetic acid are used as raw materials to prepare a polyvinyl acetate oxotitanium precursor, and then the precursor, aids and solvent are uniformly mixed according to a certain ratio to obtain a spinning solution; the spinning solution is prepared into polyvinyl acetate oxotitanium precursor fibers by virtue of an electrostatic spinning technology; and the precursor fibers are thermally treated in a muffle furnace to obtain solid titanium oxide nano fibers or mesoporous titanium oxide nano fibers. The method has the characteristics of simple process flow, excellent fiber quality, environmental friendliness and the like, the industrialized production is facilitated, and the obtained titanium oxide nano fibers have excellent catalytic performance and can be used as a photocatalytic material for degrading organic pollutants.

The invention discloses a preparation method of strong-acidity polystyrene cationic exchange resin, comprising the steps of mixing well methyl styrene, methylene bisacrylamide, and methylbenzene, adding pre-processed rice hull and gelatin solution, mixing well, adding tert-butyl peroxy-2-ethylhexanoate, heating and stirring, heating, holding the temperature, aging, and filtering to obtain polystyrene microspheres; feeding the polystyrene microspheres into n-heptane for swelling, dropwise adding sulfuric acid solution while stirring, adjusting the temperature after dropwise adding, stirring, washing with ice water, and filtering to obtain the strong-acidity polystyrene cationic exchange resin. The pre-processed rice hull is prepared by: stirring rice hull and kaolin, feeding into an anaerobic muffle furnace, heating for calcining, cooling, grinding, adding nitric acid solution, stirring, washing until neutrality, drying, adding hyperbranched polysiloxane and acetone, ultrasonically treating, treating with microwave, and drying by spraying.

The invention relates to the field of battery heat-conducting materials, and particularly relates to a graphite mixture, graphite film for heat conducting, and a preparation method of the graphite mixture and the graphite film. The graphite mixture for heat conducting comprises a polyimide polymer and a magnetic-conductive material, the magnetic-conductive material comprises graphite. In addition, the preparation method of the graphite mixture for heat conducting comprises the following steps: adding the magnetic-conductive material into the polyimide polymer solution, to obtain the graphite mixture for heat conducting. The invention also provides a graphite film for heat conducting, which is prepared from the graphite mixture for heat conducting. The prepared heat-conducting film with the heat conductivity of 300-2000W/m.K and can widely replace or can be used in various heat-radiating environments by combining aluminum/copper heat-radiating materials, and compared with the existing same type heat-radiating material, the heat-radiating film material prepared by using the technology shows excellent heat-radiating performance, is beneficial to light weight and small size of the product, and has obvious economic effects.

The invention provides a powder active carbon, which is prepared by using turf as a raw material. The powder active carbon is characterized in that the specific surface area of the powder active carbon is 1200-1400 m<2>/g, the iodine adsorption capacity is 1000-1200mg/g, and the methylene blue absorbing value is 130-200mg/g. The powder active carbon is prepared by the method provided by the invention. The preparation method comprises the following steps of 1) removing impurities by using a turf sieve, drying and crushing the sieved turf; 2) putting the crushed turf into sodium carbonate solution with a weight ratio of (3-5) to 1, mixing the mixture evenly into mud immersion, and drying the mixture; 3) raising the temperature of the dried mixture to 500 DEG C a program of 10 DEG C/min, taking out the cooled mixture to be grinded, and washing away excessive anhydrous sodium carbonate and surface residue with dilute nitric acid, and washing the mixture with deionized water to a pH value of 4.5-4.8, performing suction filtering and drying for the mixture to obtain powder active carbon. The invention further discloses a method for preparing the powder active carbon.

The invention relates to nonluminous glaze. The nonluminous glaze is prepared by adding a proper amount of aluminum powder into slaked talc, quartz and feldspar to generate metal aluminum oxide without glossiness, so that the production cost of the nonluminous glaze can be effectively reduced; the added slaked talc is subjected to high-temperature calcination, so the impurity content is low, the loss on ignition is small and new grain which people do not like is avoided; a proper amount of silicon micropowder is added into the nonluminous glaze, the temperature resistance and the acid and alkali resistance of the glaze layer can be improved and the effect of improving the mechanical strength of the glaze layer is achieved; and the nonluminous glaze is obtained by performing wet ball milling by a wet ball mill, the raw materials for forming the nonluminous glaze are stirred and mixed uniformly, slurry with the physical and chemical properties tending to be uniform and consistent can beobtained, and glazing is fertilized.

The invention discloses a preparation method of micron/submicron order silver powder. The preparation method comprises the following steps that S1, a dispersion emulsion is prepared; S2, a reducing liquid is prepared; S3, the dispersion emulsion is mixed with the reducing liquid according to the volume ratio to obtain a mixed solution, and the pH of the mixed solution is adjusted; S4, silver nitrate is weighed according to the stoichiometric ratio of a reducing organic matter to the silver nitrate, a silver nitrate solution is prepared, then the silver nitrate solution is mixed with the mixedsolution obtained in the step S3, and stirring is carried out to obtain wet silver powder; and S5, washing, filtering, dispersing, surface modification and drying are carried out on the wet silver powder obtained in the step S4 to obtain the silver powder. According to the preparation method, firstly, a dispersing agent is prepared into the dispersion emulsion so that the burning weight loss of the silver powder can be effectively reduced; and meanwhile, the surface modification is carried out on the wet silver powder in the subsequent step by adopting a substance containing a mercapto group so that the dispersibility and the sintering activity of the silver powder can be effectively improved.

The invention provides a preparation method of Mg-Li matrix Mg-Li-Cu-Ni-Y series bulk amorphous alloy. The method comprises the following steps: mixing high purity magnesium block, lithium block, nickel block, high purity copper ingot and high purity yttrium block according to a nominal formulation-Mg65LixCu20-xNi5Y10 (0<x<5at.%), wherein firstly smelting by using the vacuum induction melting method to obtain Cu-Ni-Y ternary alloy, secondly polishing the Cu-Ni-Y alloy, grinding the alloy to mix with magnesium block and lithium block and then using the same smelting method to prepare Mg-Li-Cu-Ni-Y quinary master alloy; and (2) after grinding the Mg-Li-Cu-Ni-Y quinary master alloy prepared by smelting, and performing vacuum rapid quenching on an ultrafast quenching device to prepare the high-strength Mg-Li matrix Mg-Li-Cu-Ni-Y series bulk amorphous alloy. The preparation method of the invention avoids large ignition loss of Mg and Li and impurity elements and increases the purity of the amorphous alloy, and the obtained Mg-Li matrix amorphous alloy has high strength, low density and good corrosion resistance.

Perlite production equipment mainly comprises a raw material pit, an elevator, a rotary drying kiln, an expansion furnace, a dust remover, an induced draft fan, an air volume regulating valve, a settling chamber, a finished product bin, a cyclone material collector, an air blower and a communication air pipe. The lower end of the elevator is positioned in the raw material pit, the upper end of the elevator is connected with the rotary drying kiln, a discharge outlet of the rotary drying kiln is connected with a feed inlet of the expansion finance, the rotary drying kiln is communicated with the dust remover by a pipeline, the dust remover is connected with the induced draft fan by an air pipe and communicated with the expansion furnace via the air volume regulating valve, the expansion valve is communicated with the settling chamber, the settling chamber is communicated with the cyclone material collector, one side of the cyclone material collector is communicated with the finished product bin by an air pipe while the other side of the cyclone material collector is communicated with the air blower, the cyclone material collector is further communicated with the rotary drying kiln by an air pipe, and an integral system is in a closed-loop control state. The perlite production equipment is fast in temperature rise and easy in temperature control, ignition loss of a furnace body is little, the service life of the perlite production equipment is prolonged, expansion efficiency is improved, energy consumption is low, utilization rate is high, repair workload is low, automatic control is realized, labor is saved, an operating environment is enhanced, and emission of greenhouse gases is reduced.