558results about How to "No radioactivity" patented technology

The invention discloses a super-light foam cement concrete and a preparation method thereof. The super-light foam cement concrete comprises the following raw materials by weight parts: 9-36 parts of dead burnt magnesium oxides, 9-32 parts of dihydric phosphates, 0.5-7 parts of adjustable solidification agents, 6-25 parts of light burnt magnesium oxides, 0.5-7 parts of sulfur-containing components, 1-25 parts of industrial slag powder, 1-20 parts of kieselguhrs, 0.3-3.9 parts of waterproof agents, 0.2-1.7 parts of foam stabilizing agents, 1.0-8.9 parts of foaming agents and 25-90 parts of water. The preparation method of the high-performance super-light foam cement concrete comprises the following steps of: metering raw materials; preparing the slurry containing the foam stabilizing agents; uniformly mixing the foaming agents; pouring and standing by; foaming and expanding; coagulating and curing; and naturally maintaining. The super-light foam cement concrete has the advantages of light weight, high strength, heat preservation and insulation, stable volume, low production cost, energy-saving property, no environmental pollution, and the like. The super-light foam cement concrete is simple in production process and is especially suitable for the heat-insulating material of external building wall, roof and floor.

The invention relates to nano optical functional materials, especially relates to an organic functional luminescent carbon quantum dots with high luminescent efficiency, a preparation method therefor and applications thereof. The preparation method employs a single-step pyrolysis synthesis method: organic compounds with a low decomposition temperature (150-300 DEG C) is heated at a temperature of 150-350 DEG C (the organic compounds are generally heated for 1-360min and heating methods comprise organic pyrolysis, hydrothermal method and the like) and subjected to a pyrolytic reaction; organic functional luminescent carbon quantum dots are obtained after post-treatment and purification. Surfaces of carbon quantum dots are modified with organosilane or organic high-molecular compounds with acylamino to form the organic functional luminescent carbon quantum dots. The organic functional luminescent carbon quantum dots can be used as luminescent functional materials, optical functional nano hybrid composite materials or used as biological living cell imaging materials.

The invention discloses thermal insulation mortar which comprises the following components in percentage by weight: 20 to 60 percent of caustic calcined magnesia, 1 to 25 percent of fly ash, 5 to 35 percent of thickening time control agent, 0 to 40 percent of enhanced thickener, 1 to 20 percent of kieselguhr, 5 to 35 percent of expanded aggregate, 0 to 5 percent of polystyrene foam particles, 0 to 0.2 percent of polypropylene fiber, 0.5 to 8 percent of water-resisting admixture, and 0 to 2 percent of water reducing agent. The thermal insulation mortar has the characteristics of capability of coagulating and hardening quickly and having strong binding capacity with base materials, good volume stability, capability of producing volume micro-expansion in the process of coagulating and hardening, no crack, no splitting, strong water resistance, ageing resistance, long service life, light weight, and good heat preservation and heat insulation performance, wherein the coefficient of thermal conductivity is 0.05 to 0.30 W / m.k. The thermal insulation mortar has the advantages of no toxicity, odourlessness, zero radioactivity, no harm to human bodies, no pollution to environments, energy conservation, environmental friendliness and low production cost.

The invention relates to an autoclaved aerated concrete block and a manufacturing method thereof, belongs to the technical field of building materials, and aims at solving the problems of high manufacturing cost and poor quality of products of the autoclaved aerated concrete block in the prior art. The autoclaved aerated concrete block comprises main materials, water and a foaming agent; the main materials include the following components (in percentage by weight): 65%-75% of tailing sand, 8%-12% of quick lime, 15%-18% of cement, and 2%-5% of gypsum; the material-to-water ratio ranges from 0.57 to 0.62; the foaming agent is added proportionally by 500g / m3 according to the total volume of the materials. The autoclaved aerated concrete block has the advantages of low manufacturing cost, convenient construction, environmental protection and energy conservation; the block further has the advantages of low weight, high heat retaining property, high anti-permeability, good fireproof performance, good sound insulation and sound absorption properties, accurate size, high strength and no radioactivity.

The invention belongs to the field of nondestructive testing and relates to a method for nondestructive measurement of a residual stress field in a metal plate through ultrasonic waves. The method for nondestructive measurement of the residual stress field in the metal plate through the ultrasonic waves is beneficial to conducting nondestructive evaluation on the residual stress in the metal plate. The single-time measuring time of the method is only about 20 seconds and is dozens of times less than the single-time measuring time of a traditional X-ray residual stress measuring method, and the detection speed is high; meanwhile, the measurement depth in the method is adjustable, the maximum depth can reach 3mm and is dozens of times that of the measuring depth in the X-ray measuring method, and thus the measuring depth is large. The method is provided for measuring large-range residual stress distribution inside the plate, and a three-dimensional diagram or a contour map of the residual stress distribution can be obtained. The cost for the single-time measuring of the method is dozens of times less than that of the X-ray measuring method, obvious economy is achieved. The method is free of radioactivity and is safer compared with the X-ray measuring method.

The invention belongs to the building material technique field, in particular relates to a building thermal insulating mortar. The building thermal insulating mortar is characterized in that the mortar is composed of dry powder and water, the dry powder and water are present in a weight ratio of 1:1.3, when in use, the dry powder is added to the water and agitated evenly; and the dry powder is mixed by materials of modified cement, modified fly ashes, a re-dispersible latex powder, wood fibers, polypropylene fibers, calcium formate, hydroxypropyl methylcellulose, hydrophobic agent, multi-functional auxiliary agent and modified expanded perlite, materials of the dry powder include: 500 parts of modified cement, 160 parts of modified fly ashes, 25 parts of re-dispersible latex powder, 3 parts of wood fibers, 1 part of polypropylene fiber, 5 parts of calcium formate, 6 parts of hydroxypropyl methylcellulose, 1 part of hydrophobic agent, 3 parts of multi-functional auxiliary agent and 300 parts of modified expanded perlite by weight. The building thermal insulating mortar has advantages of strong heat preservation, firm bonding with wall bodies, compression resistance, superior tensile performance, good weathering resistance, environmental protection, and excellent waterproofing, anti-cracking and shedding prevention properties.

The invention discloses a zircon power alternative coating for casting, which is characterized in that a coating composition comprises carrier liquid consisting of isopropyl alcohol, toluene and ethanol, a suspending agent consisting of organobentonite and attapulgite, an adhesive consisting of thermoplastic phenolic resin and rosin, and refractory aggregate consisting of white alundum powder and andalusite powder. The coating composition comprises the following components by weight percent: 6-10 percent of isopropyl alcohol, 2-4 percent of toluene, 6-10 percent of ethanol, 0.5-1.5 percent of organobentonite, 1-2 percent of attapulgite, 0.2-1.0 percent of thermoplastic phenolic resin, 0.2-1.0 percent of rosin, 15-55 percent of white alundum powder and 15-55 percent of andalusite powder. Compared with the conventional common cast steel zircon power coating, the coating has high thixotropy and leveling property, is smooth and dense and has enough normal temperature and high-temperature strength, so that the casting roughness meets the quality requirement; and moreover, the zircon power alternative coating is low in gas outlet quantity and has proper shielding property, and the defects of the casting air holes can be obviously reduced.

The invention belongs to the field of nondestructive detection and relates to a method for nondestructive evaluation of residual stress levels in an aluminum alloy forged piece through ultrasonic waves. According to the method, the phenomenon that the propagation speed of the ultrasonic waves in materials can be affected by stress in the materials to a certain extent is used, and the difference of residual stress levels among different positions in the large size aluminum alloy forged piece is reflected through changes of sound speeds. The method has the advantages of being high in detection speed, large in measuring depth, good in economy and the like. The residual stress in the large size aluminum alloy forged piece is measured through the sound elastic effect of the ultrasonic waves in the method, and the method has the advantages of being high in measuring speed, convenient to use, flexible in measuring range, good in economy and the like. The single-time measuring time of the method is about five minutes and is shorter that the single-time measuring time of a neutron diffraction residual stress measuring method, the detection speed is high, the maximum measuring depth of the method can reach 400 mm, is larger that the measuring depth of the neutron diffraction method, and is much larger that the measuring depth of an X-ray method or a Barkhausen noise method.

The invention relates to a fireproof foam concrete door core plate and a preparation method thereof. A foam concrete base plate of the door core plate is prepared from cement paste and foam used for concrete in a volume ratio of 1:(5-12); the cement paste comprises the following raw materials in part: 80 to 100 parts of Portland cement, 10 to 30 parts of filling material, 30 to 50 parts of water, 2 to 7 parts of EVA emulsion, 2 to 6 parts of waterproof agent, 0.5 to 1.0 part of water repellent, 1.5 to 2.5 parts of water reducing agent, and 1 to 3 parts of early strength agent; and the volume weight of the foam used for the concrete is 70g / L to 90g / L, and the foam is prepared by adding water into a high-quality foaming agent for foaming. The fireproof foam concrete door core plate has the advantages of light weight, high strength, low heat conductivity coefficient, good fireproof and waterproof performance, long service life and the like, the preparation process is simple, and the cost is low.

The invention relates to organic phosphonic (phosphoric) acid rare-earth salt fire retardant and a synthetic method and application thereof, which belongs to the fields of fine chemical and macromolecular materials. The low-toxic, low-smoke, environment-friendly and efficient fire retardant is formed by combining with rare earth elements in organic phosphonic (phosphoric) acid structure. Compared with the organic phosphorous compound, the fire retardant has extremely high stability at normal temperature and plastic processing temperature; moreover, the use of rare earth elements ensures that the fire retardant and other components in macromolecular material are formed into a combination having better effects than Van Der Waals Force, hydrogen bond and the like; particularly, when mixed with other components of inflatable composite fire retardant, the fire retardant can obtain better synergic effects than currently used phosphinates such as aluminum phosphinate, zinc phosphinate and the like; moreover, the obtained macromolecular material can maintain better physical and mechanical properties.

The invention discloses a water glass transparent reflecting heat-insulation coating material and a preparation method thereof, wherein the water glass transparent reflecting heat-insulation coating material comprises, by mass, 35-50% of an aqueous acrylic emulsion, 5-15% of an aqueous silica sol, 5-15% of an aqueous polyurethane, 5-10% of an aqueous nanometer antimony tin oxide heat-insulation slurry, 5-10% of an aqueous nanometer lanthanum hexaboride heat-insulation slurry, 5-10% of an aqueous nanometer vanadium dioxide heat-insulation slurry, 0.1-0.5% of an anti-foaming agent, 0.1-0.3% of a wetting dispersing agent, 0.2-0.5% of a leveling agent, 0.2-1% of a thickening agent, 0.1-0.2% of an anti-mildew antibacterial agent, 0.5-2.5% of a film forming auxiliary agent, 0.5-2% of a silane coupling agent, and 5-25% of deionized water.

The invention provides a process for preparing rare earth environmental protection long persistence glass comprising the steps of selecting alkaline earth oxide, boron oxide and silicon dioxde as primary hyaline, charging rare earth, grinding and mixing homogeneously, high temperature solid phase reaction, and annealing treatment.

The invention relates to opacifier, a preparation method thereof and ceramic glaze with the opacifier and belongs to the field of ceramic glaze. The opacifier is mainly prepared from 5-40% of calcium carbonate, 5-40% of titanium dioxide, 0.05-2.5% of dispersing aid and rest of water by weight. The ceramic glaze with the opacifier is prepared from raw materials including 6 to 10 parts of opacifier, 30 to 35 parts of quartz, 25 to 30 parts of potash feldspar, 2 to 4 parts of aluminum oxide, 10 to 12 parts of calcite, 4 to 6 parts of dolomite, 2 to 3 parts of zinc oxide, 4 to 5 parts of kaolin and 1 to 2.5 parts of clinker by weight. Because the opacifier is composite particle which uses calcium carbonate as core and crystalline titanium dioxide as film, the opacifier can enable the ceramic glaze to form stable titanite crystal form, and the ceramic glaze surface yellowing due to directly adding titanium dioxide particles is effectively avoided.

The invention relates to a red mud raw material-based non-steamed brick and a production method thereof, and belongs to a building material wall brick and a production method thereof. The brick is produced by adopting industrial waste residue red mud as a main raw material, granular blast furnace slag micro-powder, lime and gypsum as auxiliary materials and water glass as an alkaline exciting agent. The red mud raw material-based non-steamed brick concretely comprises, by mass, 70-80% of the red mud, 0-10% of desulfurized ash, 0-10% of slag, 5% of lime, 8-10% of desulfurized gypsum and 0-5% of water glass. The method comprises the following steps: drying the above ingredients, grinding, weighing the ingredients, mixing according to above proportions, molding, and carrying out standard maintenance and natural maintenance. The above molding process is simple, and is characterized by direct casting vibration molding without pressurization, and the above natural maintenance process is characterized by normal-temperature rapid reaction solidification, and has the advantages of no sintering, and no steam or steam press maintenance. The non-steamed brick has the advantages of high compressive strength, strong drying shrinkage resistance, and no efflorescence phenomenon after long-term storage. The method massively using the industrial waste slag has the advantages of resource and energy saving, low cost and small energy consumption.

The invention relates to a detection apparatus for contraband based on the Raman spectral analysis technique. The detection apparatus comprises a laser, an optical probe, a micro-spectrometer and a data acquisition and analysis processing system; the optical probe is a box which has a light inlet hole, a light outlet hole and a detection end, and a reflector, a dichroic beam combiner, condenser lenses and a long wave pass filter are provided in the box; laser light emitted by the laser is reflected by the reflector and the dichroic beam combiner after entering from the light inlet hole and then enters into a detection object arranged on the detection end after transmitted by one condenser lens, stimulated radiant light emitted by the detection object is transmitted by the condenser lens and the dichroic beam combiner, and light beams passing through the filter are focused by another condenser lens and enter into an interface terminal of the micro-spectrometer through the light outlet hole. Optical paths of the detection apparatus for contraband in the invention are simply arranged and have high efficiency and small loss; the detection apparatus is applicable to detection objects of various sizes and forms and has the advantages of low cost, strong resistance to interference, good stability, a small volume and convenient usage.

The invention relates to a waterproof paint for architecture and building materials, especially to a water-base paint which is widely applied to brushing objects such as boarded floor, toy for children, corrugated paper, inner wall, outer wall, woodwork, damp proofing, cement, leak stopping, metal product, etc. The prescription of water-base paint totally differs from the traditional one, comprising: adding raw materials such as glycerin, xylitol, etc., except crylic acid emulsion, which are food-grade raw materials substantially, nontoxic and environmental-friendly absolutely. The water-base paint can be constructed directly, bring handsome looking and relieving labor strength of constructors. Furthermore, the water-base paint does not damage health of constructors, with multiple advantages of current waterproof paints.

The invention discloses a cooperative detection ion mobility spectrometer of the positive ion and negative ion of a plasma source; the plasma source has a positive metal electrode and a negative metal electrode, and voltage is imposed between the two electrodes so as to generate the plasma; the electrode is of the shape of a needle, rod, plate, cylinder or net, the discharging voltage is hundreds to thousands and the current is microampere to milliampere; the signal intensity of the ion source is large, the positive ion works cooperatively with the negative ion, therefore, the detection sensitivity is good, the resolution is high, the measurement speed is fast, the meter has small volume and simple operation and is applicable to fast online detection and alarming of trace amount of explosive, drugs and organic matters; compared with the radioactive source of the traditional ion mobility spectrometer, the plasma source has the advantage of no radioactivity, the spectrometer is convenient in use, maintenance and management and has high detection sensitivity and detection accuracy.

The present invention discloses a superconducting liquor, its composition contains (wt%) 65-71% of hydrogen peroxide, 3-6% of potassium hydroxide, 0.3-0.6% of magnesium peroxide, 0.3-0.6% of potassium sulfate and the rest is distilled water. Said superconducting liquor has several advantages of low electric consumption in application, quickly making heat exchange, long service life, saving energyby above 50% and others, and can be used in various energy source equipments, such as heating system, high-pressure boiler, normal pressure boiler, medical equipment, plastic greenhouse and waste heat recovery, etc.

The invention discloses a cement-based wave-absorbing material doped by graphene oxide and a preparation method thereof. The preparation method comprises the following steps: weighing cement for subsequent usage; weighing silica fume according to a certain mass ratio, pouring the cement and silica fume into a stirring pot, carrying out uniform mixing under stirring, then weighing nanometer ferriferrous oxide and nanometer nickel according to a certain mass ratio, pouring the weighed nanometer ferriferrous oxide and nanometer nickel into the stirring pot and carrying out low-speed stirring for 2 to 5 min; adding dispersion liquid of graphene oxide into a mixture obtained in the previous step and carrying out ultrasonic vibration; and finally, weighing water and a water reducer according to a mass ratio, adding the weighed water and water reducer into the mixture, carrying out low-speed stirring with an agitator for 2 to 5 min, stopping stirring for 10 to 30 s, then carrying out high-speed stirring for 2 to 5 min, injecting obtained slurry into a mold, carrying out vibration molding, then carrying out maintenance in a constant-temperature constant-humidity case, carrying out demolding in 24 h and then continuing maintenance under same conditions so as to obtain the cement-based wave-absorbing material. The cement-based wave-absorbing material doped by graphene oxide has the advantages of good wave absorption performance, wide frequency range, environment friendliness and no radioactivity; the preparation method is simple in process, easy in shaping and suitable for standard production; and the prepared material can be well bonded with buildings.

The invention relates to a nickel-free black tin cobalt alloy plating solution and an electroplating technology by using same. The parameters and contents of all components of the plating solution are as follows: the content of tin ions in a tin salt is 0.05-6g / L; the content of cobalt ions in a cobalt salt is 0.05-0.8g / L; the content of third metallic ions is 0.02-50g / L; the content of a complexing agent is 0.1-180g / L; the content of a blacking agent is 0.1-50g / L; the content of a PH buffer is 5-300g / L; the baume degree of the plating solution is 6-250; the temperature is 20-55 DEG C; and PH is 9-13. According to the technology provided by the invention, tin is taken as a main alloy layer and few cobalt and third and fourth metal ions are added in tin to form a ternary or quaternary alloy system; the cobalt content in the common black tin cobalt alloy plating solution excesses 8g / L, but the cobalt content is reduced to 0.05g / L according to the new electroplating technology provided by the invention; the special biodegradable or non-biodegradable stabilizing complexing agent and PH buffer are used, so that the production cost is lowered; and the nickel-free black tin cobalt alloy plating solution meets the limitation requirement on CO in the European Union Rosh standard, Germany LMBG standard, Mattel children toy standard, European Oeko-Tex Standard 100 standard and the like.

The invention relates to a method for preparing fluorescent polypropylene fiber by adopting organic fluorescent compound. The method comprises the following steps: (1) salicylic aldehyde and derivatives of salicylic aldehyde are dissolved in absolute ethyl alcohol and heated to 70 to 100 DEG C in water bath, ethanol solution of diamine compound is added in drips, after condensing reflux and standing, brilliant yellow, orange or red precipitate can be obtained, and the precipitate is filtered, re-crystallized by ethanol, pump filtered and dried, thus obtaining the organic fluorescent compound; (2) polypropylene, the fluorescent compound and fluorescent additive are mixed uniformly, and melt blending, extruding and spinning are carried out by a multifilament 400 melting and spinning machine, the spinning speed is 400m / min, the spinning temperature is 270 DEG C, the after-drawing ratio is 2.8 times, and the fluorescent polypropylene fiber can be obtained. The preparing method is simple, and the yield is high; the obtained fluorescent compound has good solid luminescent property, non-toxicity, non-radioactivity, uniform dispersion in high polymer of polypropylene and good spinnability, and good luminescent effect can be obtained by only adding less than 1 percent of the fluorescent polypropylene fiber.

The indicator comprises organic solvent with 10-40wtúÑ inorganic salt and 0.1wtúÑ-5wtúÑ chromaticity indicator without cobalt. Thus, factor of polluting environment and harming health to people is removed thoroughly. The invented product is excellent product of environment protection with low cost. Allochroic silica gel made from the invented indicator can be used in multiple regenerations.

The invention provides a long-afterglow luminescent material and a preparation method thereof. The long-afterglow luminescent material is a[Ln[2-x]O3.xRe].b[(1-y)Al2O3.yGa2O3], wherein Ln is two of Gd, Y, Lu and La, and Re is one or more of Tb, Eu, Ce, Nd, Er, Yb and Bi. Compared with the prior art, the long-afterglow luminescent material uses Ln2O3, Al2O3 and Ga2O3 as matrixes and Re as the activator to obtain the long afterglow property; the mole coefficients of the components are changed, so that the luminescent material can be excited by blue light to obtain long afterglow, and the luminescent color of the long afterglow can vary between blue green and orange. The luminescent material has the advantages of long afterglow time, high brightness, high physicochemical stability, no toxicity or harm, no radioactivity and the like, and can not do harm to the human body and environment.

The invention relates to a method for producing anti-pollution flexible real stone face tiles. The invention adopts a technical scheme that: weather-proof protective layer slurry is sprayed on a polytetrafluoroethylene conveying belt, which can be demoulded, on a production line, the sprayed slurry is quickly dehydrated by microwaves to form a film, then a real stone paint with well prepared viscosity is scraped on the film, next decorative mortar with well prepared viscosity is scraped on the real stone paint, later on aluminate cement powder which can be activated again is sprayed on a non-solidified decorative mortar layer, the aluminate cement powder is baked and dehydrated and the conveying belt is demoulded to give a semi-finished product; weather-proof protective layer is coated with anti-pollution layer powder by static absorption; and finally, the products are manufactured by cutting a large decorative tile and testing and packaging the cut decorative tiles. The face tiles have the advantages of avoiding surface polluted due to resistance to cement mortar bonding agent, saving a cleaning working procedure in flexible face material bonding construction, increasing the bonding strength of the flexible real stone face tills to walls, along with high flexibility, weather-proof performance, high manufacturing efficiency, no high-temperature sintering, energy conservation and environmental protection.

The invention discloses a medical magnetic navigation spotter, and relates to a medical magnetic detecting, positioning and displaying instrument, in particular to a device suitable for indicating a concrete position of a positioning screw hole of an intramedullary nail on a bone cavity, and detecting, positioning and displaying in other surgical operations, particularly suitable for detecting, positioning and displaying the intramedullary nail of which the far end and near end are provided with oblique interlocking positioning screw holes. The structure of the device comprises a magnetic navigation position detecting controller, a magnetic navigation detector assembly, a detecting lock sleeve assembly, a near end sighting device handle, a magnetic generator, a far end navigation assembly, a far end positioning block, a near end sighting support and a far end connection long rod, wherein the far end positioning block is arranged on the upper part of the near end sighting device handle; the far end connection long rod is arranged on the upper part of the far end positioning block; the far end navigation assembly is arranged on the front part of the far end connection long rod; the magnetic generator is inserted in a far end positioning hole of a far end sighting navigation rod of the far end navigation assembly; and the lower part of the near end sighting device handle is provided with a surgical instrument positioning sleeve.

The invention discloses a nuclear reactor fuel rod simulating electric heating device and an assembly process. The device comprises a simulation jacket and simulation fuel element pellets, each simulation fuel element pellet is provided with 16 through holes axially extending along the simulation fuel element pellet, thermocouple wire anodes are mounted in part of the through holes, thermocouple wire cathodes are mounted in part of the through holes, and inert gas is stored in the rest through holes. Electric heating rods are mounted in an inner cavity of each simulation fuel element pellet, and a plurality of external wall temperature thermocouples are mounted on the outer side of the simulation jacket. The electric heating device is used for laboratory simulation of nuclear reactor fuel rods to carry out high-temperature degradation and reflooding behavioral experiments of fuel rods for pressurized water reactors under severe accident conditions. A working medium is an aqueous medium, a steam medium or an inert gas medium, a working pressure is 5MPa, a long-term working temperature is 1800 DEG C, and a short-term working temperature is 2400 DEG C.

The invention relates to thiophosphate cement. The thiophosphate cement is prepared from 4 to 60 parts by weight of heavy-calcined magnesia, 3 to 50 parts of one or more dihydric phosphates, 1 to 6 parts by weight of one or more solidification adjustment agents, 8 to 36 parts by weight of light-calcined magnesia, 1 to 10 parts by weight of one or more sulphur-containing components and 1 to 20 parts by weight of industrial waste residue powder. The thiophosphate cement has the advantages of optionally adjustable coagulation time of a few minutes to a few hours, high early strength, high strength, high bonding strength, no reduction of later strength, micro-dilatation, and fast coagulation hardening at a low temperature. The thiophosphate cement is convenient for construction, is suitable for emergency repair of engineering structure defects of buildings, bridges, roads, airports, tunnels, dams and canals, can be used for cemented gravels, industrial waste residues and lightweight aggregate, can be used for preparation of building material products such as building mortar, concrete bricks and building blocks, thermal insulation wallboards and thermal insulation roofs, and has wide application prospects in the fields of nuclear waste, municipal waste and sludge treatment, eco-environment protection and bioengineering.

The invention discloses a method for preparing an artificial vesuvianite building block from Bayer red mud. The method for preparing the artificial vesuvianite building block from Bayer red mud comprises the following steps of carrying out milling and slurrying of Bayer red mud, carrying out mixing and blank preparation, carrying out drying and sintering, and carrying out cooling. The method for preparing the artificial vesuvianite building block from Bayer red mud has a low investment cost and simple processes, realizes the preparation of the artificial vesuvianite building block which is a novel artificial non-metallic porous material vesuvianite building block, and provides a novel and reliable approach for Bayer red mud comprehensive utilization. Because of addition of fine coal powder, a leavening agent, a foaming agent and a molding binder in ingredients, a sintered blank has regular or irregular micro-apertures, small apertures and big apertures thereby forming the artificial vesuvianite building block which is a sponge-like ceramic building product. The artificial vesuvianite building block can absorb sound, reduce noise, improve a hearing environment, adjust air humidity by its unique breathing function and improve an ecological environment. Therefore, the artificial vesuvianite building block can be widely utilized for masonry building, floor building and wall decoration, and is an ideal, eco-friendly and energy-saving building and decorative material.

The invention relates to an exterior wall tile and a production method thereof, in particular to a production method of a sandstone-like porcelain exterior wall tile. The production method comprises the following steps: using architecturally applicable materials to press an adobe of the exterior wall tile; adding sandstone particles with a fineness of 20-150 meshes in a suspending agent to prepare a glaze slurry; spraying or coating the glaze slurry on the surface of the adobe; drying, preheating, sintering and cooling the adobe covered with the glaze slurry to obtain a finished product. According to the invention, the whole sandstone-like porcelain exterior wall tile is prepared by only needing one sintering process, thus fuel and energy of sintering one time are saved compared with the prior art, the energy consumption and exhaust discharge of products with same specification are greatly reduced; and the whole exterior wall tile has the decorative effect similar to that of simulation sandstone, thus compared with the prior art, the exterior wall tile disclosed herein has better decorative effect and lower production cost.