768 results about "Vitreous enamel" patented technology

The invention belongs to the technical field of enamel glaze preparation, and particularly relates to a high-temperature-resistant compact enamel glaze preparation method, which comprises: 1, enamel frit preparation: mixing 45-65% by mass of silicon dioxide, 10-15% by mass of anhydrous borax, 5-10% by mass of sodium carbonate, 2-6% by mass of lithium carbonate, 2-6% by mass of calcium carbonate, 2-6% by mass of strontium carbonate, and 3-6% by mass of ice crystal to form a batch, melting at 1300 DEG C for 2-3 hours, carrying out water quenching to prepare an enamel material, drying, and sieving with a 200-mesh sieve to obtain enamel frit powder; step 2, preparing enamel glaze slip, namely mixing and ball-milling 40-55% of enamel frit powder, 15-30% of 316 # stainless steel powder, 5.5-10% of clay suspending agent and 25-50% of water in percentage by mass to obtain the enamel glaze slip; and step 3, enamel coating and firing. The enamel coating has excellent high temperature resistance and corrosion resistance and long service life, and the preparation process is simple in requirement, simple and convenient to operate and suitable for industrial production.

The invention discloses a real-time monitoring and feedback control system for enamel electrostatic powder coating, and relates to the technical field of industrial enamel coating. The system comprises a data acquisition and monitoring module, a feedback control decision module, an execution mechanism control module, a spraying path planning and adjusting module, a parameter optimization and adaptive adjustment module and a multi-target cooperative adjustment strategy module. The system builds a standardized state vector and recognizes abnormity by collecting spraying enamel electrostatic powder state parameters, deposition error signals and environment interference data, and closed-loop control and dynamic adjustment of spray gun electrode voltage, powder supply amount and spray gun path parameters are achieved. Intelligent algorithms such as particle swarm optimization are introduced to optimize a controller and process parameters, the coating uniformity and the deposition efficiency are automatically balanced in combination with a multi-target collaborative strategy, and stable spraying quality is achieved under complex working conditions. The method has the advantages of self-learning, self-adaption and expandability, and the intelligent level and the production performance of the enamel electrostatic powder spraying process are remarkably improved.

The invention relates to the technical field of inorganic non-metal coating materials, in particular to high-stain-resistance enamel matte glaze and a preparation method thereof.The high-stain-resistance enamel matte glaze is prepared from selected quartz sand, feldspar and other basic raw materials by adding a composite additive Y and a rare earth activator Z. The preparation method comprises the steps that the basic raw materials are mixed and subjected to ball milling, then the additives are added for continuous ball milling, high-temperature melting, water quenching and secondary ball milling are conducted, and the high-stain-resistance enamel matte glaze is obtained. The granularity is controlled, and the stain resistance is improved. The enamel matte glaze has the advantages of obvious advantages, high stain resistance, difficulty in stain attachment, easiness in cleaning, capability of prolonging the service life of a product and reducing the maintenance cost, photocatalytic self-cleaning and environment-friendly characteristics, good matte effect and capability of improving the competitiveness of the product.

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention discloses an enamel plate surface defect detection method based on machine vision, and relates to the technical field of enamel plate surface defect detection. The method comprises the following steps: acquiring an original image of an enamel plate, and fusing the original image through a point-by-point optimal gray fusion method to obtain a real-time reflection suppression image; a defect-free reflection suppression image of the enamel plate is collected, matching analysis is conducted on the defect-free reflection suppression image and the real-time reflection suppression image through an improved PaDiM algorithm, a difference texture area is obtained, and coordinates of the difference texture area are recorded; in the difference texture area, two types of image features are extracted through a scale attention feature extraction method and fused, a real-time and standard fusion matrix is obtained, and a defect detection result is obtained through similarity matching; and converting the coordinates of the difference region to obtain a defect positioning result, calculating a defect comprehensive score based on a defect detection result, and grading to complete the surface defect detection of the enamel plate.

The invention discloses a nuclear radiation resistant heat-insulating protective coating for steam pipelines and a preparation method thereof. The coating comprises a surface layer and a bottom layer; the surface layer comprises 30 to 50 parts of a surface layer base, 10 to 30 parts of pigments and fillers, 5-10 parts of metal powder, 18 to 20 parts of a curing agent and 18 to 20 parts of a diluent; the bottom layer comprises 10 to 30 parts of a bottom layer base, 30 to 50 parts of pigments and fillers, 5-10 parts of metal powder, 18 to 20 parts of a curing agent and 18 to 20 parts of a diluent; wherein the surface layer base comprises acrylic modified organic silicon resin; the bottom layer base comprises water glass; the pigments and fillers comprise enamel powder, ceramics and auxiliary fillers; the auxiliary fillers comprise one or more of mica, iron oxide, zinc titanate, fluoropolymer and borosilicate; the coating of the invention can effectively insulate and protect the steam pipeline in a high temperature and nuclear radiation environment, thereby extending the service life of the steam pipeline and improving the safety and reliability of the nuclear power plant.

The invention relates to a washing and / or cleaning agent, comprising at least one peptide and at least one enzyme which has hydrolytic activity on an ester bond, preferably selected from lipase and esterase, in particular esterase with lipolytic activity, particularly preferably lipase, wherein the peptide is suitable for adhesion to a fat- and / or oil-containing surface or to a surface coated with fat and / or oil or to a surface provided with at least one fat- and / or oil-containing soil, wherein the surface consists of hard surfaces, more preferably surfaces containing or consisting of ceramic (e.g. porcelain, earthenware), metal, steel, stainless steel, plastic, glass, natural and artificial stone, painted and enamelled surfaces, wood, laminate, linoleum and mixtures thereof, particularly preferably tableware (preferably made of ceramic such as porcelain or earthenware and plastic), metal (e.g.cutlery or pots) or glass and mixtures thereof, particularly preferably tableware (preferably made of ceramic such as porcelain or earthenware and plastic), metal (e.g. cutlery or pots) or glass, and / or textiles, more preferably textiles containing or consisting of cotton, polyester, polyamide, polypropylene and mixtures thereof, particularly preferably cotton, polyester and mixtures thereof. Furthermore, the invention relates to methods for cleaning hard surfaces and / or textiles, and to the use of such peptides and agents for improving the cleaning performance on at least one greasy and / or oily soil.

The invention discloses fluoride-salt-free and nitrate-free medium-temperature semitransparent glaze for steel plate enamel as well as a preparation method and application of the medium-temperature semitransparent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, potassium feldspar, anhydrous borax, sodium carbonate, titanium dioxide, monopotassium phosphate and zinc oxide according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 800-840 DEG C and the firing time of 20-30 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free high-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 840-880 DEG C and the firing time of 820-830 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride salt-free and nitrate-free low-temperature matte glaze for steel plate enamel as well as a preparation method and application of the low-temperature matte glaze, and belongs to the technical field of enamel. The matte glaze is prepared from quartz, borax pentahydrate, sodium carbonate, titanium dioxide, magnesium oxide, monopotassium phosphate, calcium carbonate, zinc oxide, magnesium carbonate, lithium carbonate, aluminum oxide and zirconium silicate according to a specific mass ratio. The preparation method comprises the following steps: mixing the raw materials, melting at 1300 + / -10 DEG C in a pure oxygen environment, and quenching after wiredrawing to detect a molten state. The matte glaze completely avoids the use of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are eliminated from the source, the fluorine content of the product is not detected through detection, and the limit value requirements of European Union REACH regulations are met. Zinc oxide and ZnO / TiO2 are added, so that the liquid phase viscosity is reduced, ion diffusion is accelerated, and the opacity (opacification performance) and gloss of the porcelain glaze are enhanced.

The invention discloses a fluoride-salt-free and nitrate-free cast iron enamel zirconium white glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The zirconium white glaze is prepared from quartz, borax pentahydrate, magnesium carbonate, potassium carbonate, potassium feldspar, zinc oxide, aluminum hydroxide, calcium carbonate, zirconium silicate, sodium tripolyphosphate and lithium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The zirconium white glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, and meanwhile, the zirconium white glaze has good porcelain surface, luster and firing adaptability, is suitable for cast iron matrixes, has the firing temperature of 740-760 DEG C and the firing time of 87-87 hours, and can be widely applied to cast iron substrates. The method can be used for producing green and environment-friendly enamel products.

The invention relates to the technical field of coatings, in particular to a coating suitable for niobium-silicon alloy surface high-temperature protection and a preparation method of the coating. The coating comprises the following raw materials in parts by weight: 100-120 parts of deionized water, 60-80 parts of nickel-chromium-aluminum-yttrium alloy powder, 60-80 parts of enamel glaze, 50-60 parts of filler, 20-40 parts of a binder, 10-20 parts of nano titanium dioxide and 6-10 parts of an additive. According to the invention, during preparation of the coating, through addition of the filler, the negative thermal expansion performance of zirconium tungstate in the filler and volume shrinkage of zirconium tungstate in a high-temperature state, a buffer space is provided for thermal expansion of other materials in the coating, cracks of the coating due to thermal stress are avoided, and the high-temperature resistance of the coating is improved; kH560 enhances the interfacial compatibility of zirconium tungstate, avoids agglomeration of zirconium tungstate, and enables the zirconium tungstate to be more uniformly distributed in a coating system.

The invention discloses fluoride-salt-free and nitrate-free low-temperature pearlescent glaze for steel plate enamel as well as a preparation method and application of the pearlescent glaze, and belongs to the technical field of enamel. The pearlescent glaze is prepared from quartz, anhydrous borax, titanium dioxide, magnesium carbonate, sodium tripolyphosphate, potassium carbonate, lithium carbonate, potassium feldspar, zinc oxide and V-26 according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The pearlescent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the pearlescent glaze has good porcelain surface, luster and low-temperature firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 760-800 DEG C and the firing time of 10-20 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free low-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for steel plate substrates, the firing temperature is 760-800 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a titanium-based enamel coating suitable for low-temperature firing and a preparation method of the titanium-based enamel coating, and belongs to the field of enamel material preparation and application. Wherein TA1 is adopted as the titanium alloy base material; the enamel frit provided by the invention is prepared by mixing and melting the following components in percentage by mass: 28 to 47.7 percent of quartz, 21.2 to 46.4 percent of boric acid, 10.5 to 13.6 percent of sodium carbonate, 5.4 to 6.9 percent of lithium carbonate, 3.8 to 4.4 percent of zinc oxide, 1.8 to 3.0 percent of barium carbonate, 2.6 to 5.5 percent of strontium carbonate and 0.5 to 1.0 percent of zircon quartz powder. The preparation method of the coating comprises the following steps: carrying out ball milling on the enamel frit, a small amount of clay, nitrite and water, spraying on the surface of a TA1 titanium substrate with a clean surface, drying, and sintering in a high-temperature furnace at 740-840 DEG C for 10 minutes; according to the titanium-based enamel coating obtained through the method, the firing temperature ranges from 740 DEG C to 840 DEG C, the coating is firmly combined with a base material, the temperature sudden change resistance is excellent, and the titanium-based enamel coating can bear the temperature difference impact of 700 DEG C.

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

The invention relates to the technical field of reaction kettles, and particularly discloses a stirring device of a glass-lined reaction kettle.The stirring device comprises an opening and closing mechanism, the opening and closing mechanism comprises a moving frame, a connecting arm, a fixing part, opening and closing parts and third elastic parts, the moving frame is rotationally connected with a rotating shaft through the connecting arm, the fixing part is connected to a stirring part, and the number of the opening and closing parts and the number of the third elastic parts are both two; the two opening and closing parts are connected with the movable frame through two third elastic parts correspondingly, the movable frame can move upwards in an inclined mode so that the two opening and closing parts can be away from each other under blocking of the fixed part, and the movable frame can further move downwards in an inclined mode so that the two opening and closing parts can get close to each other under the action of the two third elastic parts; according to the stirring device of the glass-lined reaction kettle, through continuous opening and closing of the two opening and closing parts, a liquid material close to an enamel coating is subjected to turbulent flow, and a buffer area is formed, so that the situation that a solid material causes large impact on the enamel coating is avoided.

An enamel rating process that aids determination of the location of a defect in a lacquer coating of a metal can by connecting the can to at least one contact of an external circuit; inserting an electrode into the can; filling the can with an electrolyte while applying a voltage to the electrode; and sensing any current flowing through the external circuit during filling of the can; wherein the level of the electrolyte upon sensing of a predetermined level of current flow is determined to identify the location of the defect.

The invention discloses an enamel composite board as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: (1) carrying out sand blasting treatment, glaze spraying, high-temperature sintering, stacking placement and pre-pressing shaping on enamel steel plates; (2) the backing aluminum plate is subjected to sand blasting treatment; and (3) sequentially compounding the enameled steel plate, the aluminum honeycomb core and the backing aluminum plate by using an epoxy adhesive to obtain the aluminum honeycomb composite plate. The enamel composite board is excellent in performance, the bonding strength, the weather resistance and the flatness of the board are all remarkably improved, and the enamel composite board is suitable for interior decoration and can also be widely applied to building curtain walls, so that the application range of the enamel composite board is widened, and the economic value of the enamel composite board is improved.

The invention relates to the technical field of inner container detection, in particular to an enamel inner container appearance defect detection device and method.The enamel inner container appearance defect detection device comprises a working table, an abutting table, a clamping mechanism and a detection mechanism; the distance between the visual sensor and the surface of the inner container is controlled in the mode that the four balls abut against the surface of the inner container at the same time, it is ensured that the visual sensor is perpendicular to the area of a shot detection part, and the problem that the detection quality is affected due to the fact that the perpendicularity and distance deviation between the visual sensor and the area is too large is solved; secondly, the front abutting table and the rear abutting table abut against the inner container from the front side and the rear side of the inner container, so that the inner container is clamped and limited, the axis of the inner container and the set axes of the abutting tables are collinear, the perpendicularity and distance control process is assisted, and the mode that the corresponding balls avoid the protrusion defect is controlled through the distance sensors; the detection distance between the visual detector and the outer surface of the inner container is maintained, and it is ensured that the detection environment of the visual sensor meets the requirement under the condition.

The invention provides a solar enamel liner sealing performance testing device, and relates to the field of enamel liner sealing performance testing. A sliding seat is arranged in the base in a sliding manner; an auxiliary structure is fixedly arranged on the outer side of the sliding seat; a limiting assembly is fixedly arranged on the outer side of the sliding seat, and a limiting assembly is also fixedly arranged on the outer side of the auxiliary structure. A plugging structure is arranged on the inner side of the liquid pipe, and a testing assembly is fixedly arranged on the outer side of the plugging structure; by arranging the testing assembly, colored fine powder can be blown into the enamel inner container body through gas; when the enamel liner main body generates tiny leakage, colored fine powder can directionally escape from the leakage channel, and a high-contrast color mark mark is formed at a defect part; therefore, the colored fine powder can be utilized to accurately position the leakage point, the positioning accuracy of the leakage point is enhanced, and the problem that accurate positioning of the leakage point is difficult to realize is solved.

The invention relates to a titanium-based enamel coating resistant to cold and hot impact and suitable for low-temperature firing and a preparation method thereof.The titanium-based enamel coating comprises enamel frits and grinding additives, and the grinding additives comprise titanium powder, aluminum silicate fibers, sodium nitrite, clay and water; the preparation method comprises the following steps: firstly preparing the enamel frit, then mixing the enamel frit with a grinding additive to obtain enamel glaze slip, then pretreating the titanium substrate to remove surface dirt, then carrying out wet spraying on the enamel glaze slip on the surface of the pretreated titanium substrate, and finally, sequentially drying and sintering the titanium substrate sprayed with the enamel glaze slip to obtain the titanium-based composite material. The titanium-based enamel coating is prepared. The titanium-based enamel coating resistant to cold and hot impact and suitable for low-temperature firing can bear 700 DEG C water cooling circulation for 22-26 times without ceramic cracking or falling off, and has excellent cold and hot impact resistance; during preparation, the preparation process is simple, and the firing temperature is 835-845 DEG C and is reduced by more than 60 DEG C compared with the prior art.

The invention discloses an enamel material and a preparation method thereof, and belongs to the technical field of enamel materials, and the enamel material comprises the following components in parts by weight: 100 parts of basic glaze, 5-7 parts of lithium-based bentonite, 1.2-2.2 parts of a carbon nanotube composite material, 0.1-0.5 part of an auxiliary agent, and 55-65 parts of deionized water. Wherein concentrated nitric acid and polyvinylpyrrolidone are added into carbon nanotubes to obtain non-covalent modified carbon nanotubes, and then the non-covalent modified carbon nanotubes are sequentially coated with nano titanium dioxide and nano silicon dioxide through a sol-gel method to obtain the carbon nanotube composite material. The method for preparing the enamel material comprises the following steps: firstly, pretreating a steel plate, then putting the basic glaze, the lithium-based bentonite, the auxiliary agent, the carbon nanotube composite material and the deionized water into an ultrasonic cleaning machine for ultrasonic dispersion for 40-60 minutes, grinding for 3-5 hours, sieving to obtain enamel glaze slip, uniformly coating the pretreated steel plate with the obtained enamel glaze slip, and drying to obtain the enamel material. And sintering in a vacuum high-temperature sintering furnace at a heating speed of 3-3.4 DEG C / min, preserving heat, and cooling to obtain the enamel material.

The invention belongs to the technical field of enamel glaze, and particularly relates to enamel glaze based on transient template in-situ reaction and a preparation method and application thereof. The enamel glaze is prepared by mixing basic enamel glaze slip and a core-shell structure functional precursor, wherein the basic enamel glaze slip is water suspension prepared by mixing and grinding basic enamel frits and auxiliaries; the core-shell structure functional precursor is inorganic composite powder, and the original structure of the core-shell structure functional precursor is as follows: silicon nitride micron particles are used as a core, and a layer of Y-Zr-Ti composite oxide is coated on the surface as a shell. According to the invention, a real chemical bonding strong interface is realized, and a firm chemical bond is constructed in situ between a reinforced phase and a glass matrix by using a high-activity oxide shell layer as a solder in a final sintering stage. The problem that an interface is weak in traditional physical blending is fundamentally solved, and stress can be effectively transmitted from a matrix to a high-strength reinforced phase.

The invention relates to the technical field of enamel steel manufacturing, in particular to ultralow-carbon high-sulfur high-nitrogen enamel steel and a manufacturing method thereof. On one hand, carbon and phosphorus in the steel are reduced, the purity of molten steel is improved, and the ultra-deep drawing performance of the steel is met; on the other hand, the contents of nitrogen and sulfur in the steel are increased, enough second-phase particles are generated to store hydrogen generated during enameling of the enameling steel, so that the fish scaling resistance of the enameling steel is improved, the comprehensive influence of elements in the steel is comprehensively considered, a fish scaling resistance index and a titanium strengthening index are set, and through appropriate component and process control, the content of the elements in the steel is increased; the technical problem that the enamel steel cannot have good ultra-deep drawability and excellent fish scaling resistance at the same time is solved.

The invention belongs to the technical field of talc, and provides a method for detecting fluorescent substances in talc raw ore, which comprises the following steps: S1, carrying out ball milling on the talc raw ore in a ball mill, sieving to obtain sieved powder, and adding deionized water into the sieved powder to obtain slurry; s2, adding the slurry into the mixture to enable the pH value of the slurry to be 5, stirring, and standing in a water bath for 2-3 hours to obtain a first precipitate; s3, adding a thiourea-ascorbic acid solution into the first precipitate to obtain a second precipitate; and S4, carrying out secondary ball milling on the second precipitate, and spreading the second precipitate in an enamel plate to detect whether the talc raw ore contains the fluorescent substances or not. The hydrochloric acid can dissolve quartz and mica to avoid generation of background fluorescence or quenching effect, and the nonionic surfactant polyethylene glycol can be adsorbed on the surface of the mineral to reduce interfacial tension, so that the hydrochloric acid is easier to infiltrate tiny pores, the pit defect caused by local over-corrosion is reduced, the pickling uniformity is improved, and the detection sensitivity is improved.

The utility model discloses a full-closed enamel furnace which comprises a closed enamel furnace assembly, a closed enamel furnace body and a closed enamel furnace body. The containing and cleaning assembly comprises a telescopic rod, a placement plate, a stop lever, a guide rail, a sliding block and a push plate; the two telescopic rods are fixed to the two sides of the bottom end in the furnace cavity respectively, the containing plate is fixed between the top ends of the telescopic rods, the stop rods are arranged in one set and placed in the center of the top end of the containing plate at equal intervals, the guide rails are fixed to the two sides of the containing plate, the sliding blocks are slidably connected to the surfaces of the guide rails, and the push plate is fixed between the opposite ends of the sliding blocks. By arranging the containing and cleaning assembly, each drying object can be limited, the objects to be dried are prevented from colliding with one another due to the impulsive force of movement of the track, the push plate can move on the placing plate, so that the push plate cleans and pushes a coating on the placing plate, cleaning of the accumulated coating is achieved, the cleanliness of the interior of the furnace chamber is kept, and the drying efficiency is improved. And artificial participation is not needed.

The utility model discloses a kind of water heater inner container casted porcelain coil fixing device, including water heater inner container and inside spiral casted porcelain coil.The coil of spiral casted porcelain coil is externally equipped with the pull bar of multiple surface casted porcelain, pull bar is evenly distributed along the coil spiral direction vertically, and its bottom is equipped with metal welding portion;Spiral casted porcelain coil below is provided with integrally-formed connecting rod, including sequentially connected first connecting section, second connecting section and U-shaped bending section arranged obliquely.The U-shaped bending section is fixedly connected with the metal welding portion of pull bar bottom, and the first connecting section is fixedly connected with connecting rod fixed seat arranged on the inner wall of water heater inner container.The utility model is through the middle part auxiliary support system of pull bar and connecting rod composition, and the fixed point of coil two ends jointly constitute stable multi-point linkage rigid structure, effectively inhibit the swing and stress in the process of transportation and use, prevent the porcelain explosion of welding portion and base material cracking, improve the reliability and service life of product.

The invention relates to a flexible metal substrate enamel and glass lining composite film as well as a preparation method and application thereof, and relates to the technical field of new materials. According to the method, continuous forming of homogeneous fluid on a flexible metal substrate is achieved through rheological control starting from melting of a glass material, then a composite film product with the multifunctional characteristics of flexibility, hardness, insulativity, corrosion resistance, barrier property and the like is obtained through heat treatment and curing, and flexible and roll-to-roll processing of enamel and glass lining composite films is achieved. The prepared composite film comprises a metal foil substrate and a vitreous coating, the thickness of the coating prepared by the method can be controlled to be less than 200 microns, and the coating is matched with the flexible metal foil substrate, so that the product is endowed with excellent flexibility, the heavy and clumsy image of the traditional enamel and glass lining product is broken, and the application prospect is wide. And a new application field is developed for the enamel and glass lining composite film.