214 results about "Perlite" patented technology

The invention relates to a geopolymer-based non-expansive building fireproof coating, and belongs to the field of building materials. A geopolymer prepared from fly ash, granulated blast furnace slag, coal gangue, oil shale waste residues and sodium silicate water glass is used as a binder, and expanded perlite is used as a heat insulation filler to prepare the inorganic building fireproof coating. Meanwhile, tailings and basalt fibers are added, so that the contractibility and integrity of the geopolymer-based fireproof coating are improved. Compared with an organic fireproof coating, the environment-friendly fireproof coating has high environment friendliness in the production and preparation process and the use and action process in the case of a fire disaster. Compared with a traditional Portland cement-based fireproof coating, the fireproof coating has more excellent performance in the aspects of high temperature resistance, corrosion resistance and the like. According to the invention, the way of resource utilization of solid wastes is widened, and the building fireproof coating with excellent performance is provided.

The invention discloses a high heat storage density stable thermochemical adsorption composite heat storage material and a preparation method thereof, the high heat storage density stable thermochemical adsorption composite heat storage material comprises 54%-57% by mass of mixed salt and 43%-46% by mass of a porous material, the mixed salt comprises MgSO4 and MgCl2, the mass ratio of MgSO4 to MgCl2 is 9: 1-6: 4, and the porous material is expanded perlite modified by nano alumina or a silane coupling agent. The high-heat-storage-density stable thermochemical-adsorption composite heat storage material provided by the invention is simple in preparation method, and the modified expanded perlite is used as a carrier of the mixed hydrated salt; the obtained composite heat storage material has excellent performance: the salt-containing load rate is 114-121%, the water absorption rate is 1.2-1.28 g / g, the heat storage density is 1123.5-1208.6 kJ / kg, the heat storage temperature is 133.4-141.3 DEG C, the structural strength is 10.346-12.631 kPa, the structural stability is 99.27-99.53%, and the stability is 79.7-83.3% after circulation for 30 times, that is, the composite heat storage material is high in heat storage density, high in water absorption rate, low in heat storage temperature, high in strength and not easy to scatter and fall off, and the composite heat storage material is suitable for large-scale production. And the material also has relatively good cycling stability.

The present invention relates to the technical field of refractory materials, and specifically discloses a lightweight and high-strength refractory ceramic material and a preparation method thereof, comprising 30%-40% lightweight filler (expanded perlite or glass microspheres), 20%-30% corundum or mullite, 10%-15% silicon carbide, 10%-20% high bauxite and 1%-5% dispersant, an oven is used to dry the lightweight filler, a ball mill is used to crush the corundum or mullite and silicon carbide, and a vibrating screen is used to screen them. The present invention ensures that the final ceramic material has the advantages of light weight, high strength, good thermal shock resistance, excellent thermal insulation, high temperature resistance, corrosion resistance, etc., is suitable for structural materials or thermal insulation materials in high temperature environments, and the precise control of humidity, temperature and molding pressure during the preparation process improves the uniformity and performance stability of the material, ensuring an efficient production process.

The invention provides a lightening composition and a well cementation cement slurry containing the same. The lightening composition comprises crushed crude pearlite, micro-silicon and fly ash.

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

The invention relates to the technical field of green building materials, in particular to phase-change energy-storage thermal insulation mortar and a preparation method of the phase-change energy-storage thermal insulation mortar. 25 to 40 parts of methyl palmitate; 120 to 180 parts of hydrophobic perlite; 8 to 15 parts of expanded graphite; 3-6 parts of phosphorus sheet-shaped aluminum nitride; 180 to 250 parts of sulphoaluminate cement; 60 to 100 parts of volcanic rock micro powder; 0.3 to 0.8 part of hydroxypropyl methyl cellulose; 0.6 to 1.2 parts of a polycarboxylic acid water reducing agent; 2 to 4 parts of nano aluminum oxide; 0.8 to 1.5 parts of propyl gallate; and 1-2 parts of zinc borate. Through the proportion design of the antioxidant flame-retardant microcapsules and the lightweight composite aggregate, the problems of poor thermal conductivity and insufficient durability of a traditional phase change material are solved. Through phase change material loading, interface modification and multi-component cooperative regulation, the thermal insulation performance, energy storage efficiency and structural stability are remarkably improved, and the material is suitable for the fields of building energy saving, intelligent temperature control and the like.

The invention discloses a steel-wood composite heat insulation fireproof door, and relates to the technical field of fireproof doors. The steel-wood composite heat insulation fireproof door comprises a mounting frame structure, a fireproof door leaf structure is hinged to the inner side of the mounting frame structure, a protective observation window structure is arranged on the inner side of the fireproof door leaf structure, and a locking structure is arranged on the front side of the mounting frame structure. Through the arrangement of the fireproof door leaf structure and the combined design of the fireproof filling ceramsite layer, the fireproof perlite plate layer, the rock wool layer, the heat insulation cotton layer and the flame-retardant sealing layer in the fireproof door leaf structure, the strength and stability of the door body are enhanced, the heat insulation effect is remarkably improved, the fireproof filling ceramsite layer and the fireproof perlite plate layer serve as inner layer materials, and the fireproof filling ceramsite layer and the fireproof perlite plate layer serve as outer layer materials; the door body has excellent fire resistance and heat insulation performance, invasion of high-temperature flames and heat can be effectively blocked, the rock wool layer and the heat insulation cotton layer serve as middle layer materials, the heat insulation effect of the door body is further improved, and heat transfer is reduced.

The invention relates to a heat insulation cup capable of improving heat insulation performance, which comprises a heat insulation cup liner, a heat insulation coating and a heat insulation cup shell, the heat insulation coating is obtained by coating the surface of the heat insulation cup liner with heat insulation paint; the thermal insulation coating comprises the following components in parts by mass: 48-56 parts of waterborne polyurethane, 26-32 parts of waterborne acrylic acid, 12-16 parts of a composite hollow glass bead component and 8-10 parts of an expanded perlite aerogel thermal insulation material; the composite hollow glass beads comprise hollow glass beads and modified graphene. The vacuum cup has the effect of improving the heat preservation performance of the vacuum cup.

The invention relates to the technical field of building materials, and discloses a preparation method of a phase change material composite building thermal insulation material based on a porous structure. 13 to 18 parts of modified diatomite; 9 to 13 parts of nano cellulose aerogel; 7 to 11 parts of food-grade palmitic acid; 8 to 13 parts of microcapsule bio-based PCM; 0.9 to 1.4 parts of modified graphene; 11 to 15 parts of environment-friendly polylactic acid; 7 to 10 parts of montmorillonite; 1-2 parts of nano silicon dioxide; by compounding the expanded perlite, the modified diatomite and the nanocellulose aerogel, a basic framework with high porosity and low heat conductivity is constructed, heat conduction is effectively blocked, by introducing food-grade palmitic acid and microcapsule bio-based PCM, the material is endowed with heat storage and temperature regulation functions, phase change latent heat is improved, and the thermal conductivity of the material is improved. By adding modified graphene and nano silicon dioxide, an efficient heat conduction network and a heat insulation structure are formed, and the heat conductivity coefficient of the composite building heat preservation material is further reduced.

The invention relates to the technical field of building ceramics, and particularly discloses a high-gloss light-weight glazed brick and a preparation method thereof.The preparation method comprises the steps that 1, composite high-aluminum mud, expanded perlite, nano-zirconia and graphene are mixed and subjected to ball milling, and green body powder is obtained; step 2, carrying out compression molding on the green body powder to form a green body, applying ground glaze on the green body, carrying out ink-jet printing, and carrying out shower coating of transition glaze and high-transmittance wear-resistant glaze to obtain a green brick; and step 3, drying the green brick prepared in the step 2, sintering, and carrying out composite polishing to obtain the high-gloss light glazed brick. The prepared high-gloss light-weight glazed brick not only has higher Moh's hardness, but also has the characteristic of remarkable light weight, so that the weight of the brick body is greatly reduced, the brick body also has higher wear-resistant grade and glossiness, scratches and wear in daily use can be effectively resisted, and the completeness and attractiveness of the surface can still be kept after the brick is used for a long time.

The invention relates to the technical field of foamed ceramics, in particular to a foamed ceramic and a preparation method thereof. The foamed ceramic comprises the following raw materials in parts by weight: 30-50 parts of waste cathode carbon blocks, 15-30 parts of rice hull ash, 15-30 parts of fly ash, 3-10 parts of calcium carbonate, 3-10 parts of expanded perlite and 2-5 parts of basalt fibers. According to the invention, the waste cathode carbon block is pretreated to form a porous structure, the porous structure and gas decomposed by calcium carbonate are jointly used as a gas source at a high temperature to generate initial pores, and a glass phase formed after rice hull ash activation has certain fluidity during sintering, and can fill pores, adjust pore surface tension and promote uniform expansion of the pores; the basalt fibers are inserted into the matrix in a three-dimensional bracket form, and collapse of pores due to high-temperature shrinkage or gas escape is prevented through physical support, so that the stability and uniformity of the pore structure are ensured, and the heat insulation performance of the foamed ceramic is improved.

The utility model discloses an environment-friendly building prefabricated wallboard which comprises a wallboard body and exterior structures arranged on the two sides of the wallboard body, the wallboard body is provided with a gypsum wall core, perlite layers are arranged on the two sides of the gypsum wall core respectively, gypsum boards are arranged on the outer sides of the perlite layers, ceramsite layers are arranged on the outer sides of the gypsum boards, and the ceramsite layers are arranged on the outer sides of the gypsum boards. And a glass wool layer is arranged on the outer side of the ceramsite layer. The wallboard body adopts the gypsum wall core, the gypsum wall core is light in weight, non-toxic and pollution-free, the perlite layers are arranged on the two sides of the gypsum wall core, the heat preservation performance and the wall hardness of the wallboard body can be improved, and the ceramsite layer arranged outside the gypsum board has the functions of heat preservation, heat insulation and high temperature resistance. The glass wool layer is arranged on the outer side of the ceramsite layer, the good sound insulation effect is achieved, the glass wool layer is adopted for the exterior structure, and the glass wool layer, the ceramsite layer, the gypsum wall core and the perlite are all natural materials and are environmentally friendly.

The invention discloses a lightweight high-strength ceramsite proppant based on composite coating and low-temperature densification and a preparation method thereof. The coating proppant comprises a ceramsite proppant and a coating layer coating the surface of the ceramsite proppant, relates to the technical field of petroleum and natural gas engineering fracturing. The ceramsite proppant comprises bauxite, perlite, a composite sintering aid, B2O3 and AlF3. The composite sintering aid comprises MnO2 and TiO2; wherein the weight part ratio of the bauxite to the perlite to the composite sintering aid to the B2O3 to the AlF3 is 80: 20: (2.5-7.5): (3-12): (3-12); the low-grade bauxite and high-silicon raw material system is adopted, and a proper amount of sintering aid is introduced, so that the sintering temperature is effectively reduced, and the energy consumption is reduced; meanwhile, the volume density of the ceramsite proppant is reduced, and a lightweight product is obtained.

The invention relates to modified closed-cell expanded perlite and a preparation method thereof, and the expanded perlite is prepared by the following steps: (1) preheating and drying: preheating and drying a perlite raw material at the temperature of 300-450 DEG C for 5-30 minutes to obtain the perlite raw material with the bound water content of 1.5-3%; (2) preliminary puffing: pre-puffing for 5-10 seconds at the temperature of 800-900 DEG C; (3) cooling the preliminarily-expanded expanded perlite to normal temperature, spraying a certain amount of water glass solution on the surface of the expanded perlite, then spraying an aluminum sulfate solution, and continuously stirring for a period of time; the continuous stirring time is 5-10 minutes; and (4) carrying out secondary puffing at 1100-1150 DEG C for 2-10 seconds to obtain the closed-cell expanded perlite.

It has been unexpectedly discovered that the addition of a natural or other pozzolan to non-spec coal ash significantly improves the properties of the non-spec coal ash to the extent it can be certified under ASTM C618 and AASHTO 295, as either a Class F or Class C coal ash. The natural pozzolan may be a volcanic ejecta, such as pumice or perlite. Other pozzolans may also be used for this beneficiation process. Many pozzolans are experimentally tested and may be used to beneficiate non-spec coal ash into certifiable Class F coal ash. Additionally, this disclosure provides a method of converting a Class C coal ash to a more valuable Class F coal ash. This discovery will extend diminishing Class F coal ash supplies and turn non-spec coal ash waste streams into valuable, certified coal ash pozzolan which will protect and enhance concrete, mortars and grouts.

This invention discloses a lightweight, high-strength ceramsite proppant based on composite coating and low-temperature densification, and its preparation method. The coated proppant includes a ceramsite proppant and a coating layer covering the surface of the ceramsite proppant. It relates to the field of fracturing technology in oil and gas engineering. The ceramsite proppant includes bauxite, perlite, a composite sintering aid, B2O3, and AlF3; the composite sintering aid includes MnO2 and TiO2; wherein the weight ratio of bauxite, perlite, composite sintering aid, B2O3, and AlF3 is 80:20:2.5-7.5:3-12:3-12. This invention uses a low-grade bauxite and high-silica raw material system, combined with the introduction of an appropriate amount of sintering aid, effectively reducing the sintering temperature and energy consumption; simultaneously reducing the bulk density of the ceramsite proppant, resulting in a lightweight product.

The utility model relates to the technical field of perlite processing, and discloses a perlite ore sand grading vibrating screen which comprises a screening cylinder. The sorting assembly comprises sieve plates, scraping plates, a vertical shaft, a poke rod, a protruding block and connecting rings, the sieve plates are fixedly installed on the inner wall of the screening barrel, the vertical shaft is rotationally connected with the screening barrel, a motor is arranged at the top of the screening barrel to drive the vertical shaft, the connecting rings are fixedly installed on the wall face of the vertical shaft, and the same scraping plates are fixedly installed on the side walls of the connecting rings; inclined poke rods continuously collide with all the protruding blocks, a sieve plate generates certain vibration, then vibration screening of the sieve plate is promoted, in the rotating process of a vertical shaft, the vertical shaft drives a connecting ring and a scraper to rotate, the scraper can scrape and drive material residues on the sieve plate and promote the material residues to be discharged from a residue discharging groove, motion interference between the scraper and the protruding blocks can be reduced, and the screening efficiency is improved. And operation stability is guaranteed, efficiency is high, and the effect is good.

The invention provides glassy shell expanded perlite as well as a preparation method and application thereof, and the preparation method comprises the following steps: pretreating perlite ore to obtain first perlite particles; proportioning the first perlite particles and a binder according to a mass ratio, and uniformly mixing the first perlite particles and the binder to obtain second perlite particles; proportioning the second perlite particles and the vitreous cladding powder according to a mass ratio, uniformly mixing and granulating to obtain third perlite particles; drying and preheating the third perlite particles to obtain fourth perlite particles; and carrying out high-temperature expansion treatment on the fourth perlite particles to obtain the vitreous shell expanded perlite. The expanded perlite prepared by the invention has the characteristics of high expansion time, small bulk density, high cylinder compressive strength, low heat conduction coefficient, small water absorption rate, acid and alkali corrosion resistance and the like; the material can be widely used for producing light materials, heat preservation and insulation materials, sound absorption and insulation materials, decorative materials and fireproof flame-retardant materials, and can be used as water surface floating heat preservation materials, sunscreen materials, reflective materials and the like.

The invention relates to the field of building materials, and discloses a coal cinder-based light thermal insulation castable and a preparation method thereof, and the coal cinder-based light thermal insulation castable is prepared from the following raw materials by mass: 50%-65% of industrial kiln coal cinder, 15%-20% of Portland cement, 8%-15% of perlite, 5%-10% of vermiculite, and 3%-5% of clay. And the application range of the temperature is 800-1000 DEG C. According to the coal cinder-based light thermal insulation castable prepared by taking the industrial kiln coal cinder and the Portland cement as main raw materials, the purchase cost of the raw materials is reduced, the effect of reducing the production cost can also be achieved, and the castable has the advantages of lower heat conductivity coefficient, low volume weight and high drying compressive strength, and is suitable for being used at the working condition temperature of 800-1000 DEG C.

The present invention provides a steel material that can suppress the occurrence of cracks during cold forging, even when cold forging is performed without spheroidizing annealing. [Solution] The steel material of this embodiment has a chemical composition in mass%, consisting of C: 0.30-0.60%, Si: 0.01-0.10%, Mn: 0.30-2.00%, P: less than 0.050%, S: 0.001-0.050%, Al: 0.001-0.200%, N: less than 0.020%, Cr: 0.01-0.40%, O: 0.0030% or less, and the remainder being Fe and impurities. The total area ratio of ferrite and perlite is 90% or more, the area ratio of perlite is 40% or more, the average particle size dP of perlite grains is 10.0 to 40.0 μm, the average particle size dP of perlite grains and the standard deviation σP of perlite grain size satisfy equation (1), the average particle size dF of ferrite grains is 25.0 μm or less, and the difference between the hardness of ferrite and the hardness of perlite is 140 HV or less. σP / dP<0.80 (1)

High impact and penetration resistant lightweight composite panels include a foam core and an impact and penetration resistant protective layer on at least a portion of the lightweight composite panel. The foam core is a polymer and / or inorganic foam layer or sheet having first and second surfaces. A fiber mesh reinforced cementitious layer can cover one or both surfaces of the foam core. Example polymer foam cores include extruded polystyrene foam, expanded polystyrene foam, polyisocyanurate foam, or polyurethane foam. Example inorganic foam cores include perlite, ceramic microspheres, hollow glass spheres, glass foam, ceramic foam, expanded silica gel, porous wollastonite, urea-silicate foam, SiOC / SiC foam, refractory foam, and graphene. The impact and penetration resistant protective layer can be formed from polyurea, polyurethane, polyurea-polyurethane hybrid, polyaspartic, polymer-modified mineral binder, or hybrid resin-mineral composite. The protective layer can include a tightly woven scrim and / or a slip resistant filler embedded in the polymer.

A method comprising (a) obtaining rock fines comprising at least one of basalt, metabasalt, diabase, rhyolite, andesite, meta-andesite, granite, graphite, talc, silica, sand, perlite, or a combination thereof, (b) obtaining a binder, (c) obtaining a material comprising at least one of Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo, Ni, Zn, or a combination thereof, and (d) combining ingredients comprising the rock fines, the binder, and the material.

The invention discloses a preparation method of a multi-layer decorative plate based on foamed gypsum and a silicon crystal composite material in the field of building decorative materials, and the preparation method of the multi-layer decorative plate comprises the following steps: mixing and stirring gypsum, a water reducing agent and water into uniform slurry, adding a foaming agent to form foam, adding a modified interface agent, stirring at a low speed, injecting into a mold, and molding to obtain the multi-layer decorative plate. Standing at room temperature, primarily curing and curing in a drying oven to obtain a foamed gypsum surface layer; mixing a modified interface agent with silica sol to form viscous slurry, adding glass fibers, stirring, and blade-coating on the surface layer to form a transition layer; the modified diatomite, the expanded perlite, the hydroxyapatite and the cellulose ether are subjected to dry mixing, then water is added, stirring is performed to form pug, compression molding and drying are performed, and a porous substrate layer is obtained; and the transition layer and the substrate layer are bonded through modified interface agent slurry, and the surface is polished after cold pressing compounding. The decorative plate has the advantages of being excellent in breathing and humidifying performance, light in weight, high in strength, fireproof, non-combustible, firm in interface bonding, convenient to install and the like, and is suitable for indoor wall decoration.

This utility model relates to the field of fire-resistant infill door technology, specifically: a reinforced fireproof infill door, comprising a door body, the door body being composed of an outer protective layer, a first fireproof and heat-insulating layer, a reinforcing support layer, a second fireproof and heat-insulating layer, a buffer and shock-absorbing layer, and an inner protective layer. The outer protective layer is a steel plate with a fireproof coating; the first fireproof and heat-insulating layer is an aerogel composite fireproof felt; the reinforcing support layer is a honeycomb stainless steel skeleton structure; the second fireproof and heat-insulating layer is an expanded perlite fireproof board; the buffer and shock-absorbing layer is melamine foam; and the inner protective layer is a fireproof decorative board. In this utility model, through the synergistic effect of the six layers, the performance of the door body is comprehensively improved from multiple aspects such as fireproofing, heat insulation, structural support, and buffer and shock absorption. It can effectively block the spread of flames and heat for a long time during a fire, ensuring the structural integrity of the door body and buying valuable time for safe evacuation and fire rescue.

The invention belongs to the field of refractory materials, and provides a light heat-insulating refractory brick and a preparation method thereof. The light heat-insulating refractory brick comprises particles, mixed powder and an additional binding agent, the particles comprise, by weight, 10-15 parts of expanded vermiculite and 30-45 parts of closed cell perlite, and the mixed powder comprises, by weight, 15-25 parts of spherical quartz powder and 5-15 parts of perlite dust collecting powder. The raw materials comprise, by weight, 5-10 parts of waste silica brick powder, 5-10 parts of siliceous pyrophyllite powder, 10-15 parts of Jiaozhou white clay, 5-15 parts of sodium montmorillonite powder and 5-15 parts of limonite powder; the additional binding agent comprises the following raw materials in parts by weight: 3-5 parts of binding slurry and 3-5 parts of pre-gelatinized starch. The refractory brick disclosed by the invention is a light heat-insulating refractory brick which is small in volume density, small in heat conductivity coefficient and capable of meeting the requirement of heat insulation in a high-temperature kiln at 900-1000 DEG C in normal-temperature compressive strength.

This utility model discloses an expanded perlite preheating device, including an expansion furnace, a heat exchange cylinder, a storage tank, and a transfer silo. A feed hopper is located at the bottom of the expansion furnace, and a mixing and conveying pipe is located at the top of the expansion furnace. The mixing and conveying pipe passes through the heat exchange cylinder, which has a heat exchange channel with an inlet and an outlet. The heat exchange channel is not connected to the inner cavity of the heat exchange cylinder. The outlet of the storage tank is connected to the inlet of the heat exchange channel, and the outlet of the heat exchange channel is connected to the inlet of the transfer silo via a pipe. The outlet of the transfer silo adds material to the feed hopper via a pipe. The beneficial effects of this utility model are: the heat exchange channel within the heat exchange cylinder allows the perlite powder to exchange heat with the waste heat of the flue gas, thus preheating the perlite powder before it enters the expansion furnace, reducing energy consumption and improving the utilization rate of waste heat from the flue gas.

The invention discloses a site construction method for a perlite heat insulation layer of an LNG storage tank, and relates to the technical field of LNG storage tanks, and the site construction method comprises the following steps: step 1, increasing the number of perlite filling ports at the top of the tank, reducing a repose angle to 22 degrees when a connecting pipe is poured, and reducing gaps and uneven density; step 2, drying and replacing the perlite filler so as to reduce the moisture and oxygen content of the perlite filler; 3, the dried and replaced perlite filler is fed into perlite filling openings for filling, perlite is fed into a storage tank in a gas driving mode in the perlite filling process, in order to guarantee the online perlite filling effect and filling safety, the number of the filling openings is increased, the filling quality of expanded perlite is improved, and the production cost is reduced. The conditions of gaps and non-uniform density are reduced, so that the cold insulation effect is improved, the evaporation rate of the LNG storage tank is reduced, and the LNG in the storage tank is kept in an ideal storage state.

The application provides a method for preparing glassy single-cavity hollow particles by using perlite tailings, which can process the perlite tailings with a particle size less than 300 mesh into glassy single-cavity hollow particles with good roundness and high strength, so that the glassy single-cavity hollow particles can be used to make light aggregate thermal refractory materials, composite materials and filling materials of various engineering materials, etc., so that the waste resource of the perlite tailings with a particle size less than 300 mesh can be recycled, so as to avoid resource waste and ecological environment destruction. Moreover, the method for preparing glassy single-cavity hollow particles by using perlite tailings in the embodiment of the application adopts vertical roasting furnace bottom feeding, and realizes disaggregation and agglomeration of particles by adding triethanolamine, so that the perlite micro-powder raw material has good fluidity and dispersity, the agglomeration of the perlite micro-powder raw material with a particle size less than 300 mesh in the roasting process can be effectively prevented, and the perlite micro-powder raw material is prevented from being bonded on the side wall of the hearth to cause the hearth blockage.

The invention relates to an efficient and long-life inorganic dry powder coating with a self-humidifying function and a preparation method thereof, and belongs to the technical field of inorganic coatings. The inorganic dry powder coating comprises the following components in parts by weight: 30-40% of potassium silicate, 10% of expanded perlite, 10-25% of high-activity sepiolite nanofiber, 10% of calcined shell powder, 18-28% of quartz sand and 2-3% of an auxiliary agent. The preparation method comprises the following steps: firstly, treating a sepiolite raw material by virtue of a synergistic process of ultrasonic beam splitting and citric acid activation, so as to obtain high-activity sepiolite nanofibers which are fully dissociated, have nano hierarchical pore channels and are rich in hydrophilic groups; and compounding the high-activity sepiolite nanofiber with calcined shell powder, expanded perlite, quartz sand and potassium silicate to synergistically construct an inorganic coating system with optimized microstructure and efficient moisture absorption / liberation performance. The coating is simple in preparation process and environment-friendly, has excellent mechanical properties and self-humidity-regulating performance, still keeps an efficient humidity-regulating effect in a long-term service environment, and has outstanding long-acting stability.

The utility model provides a perlite plate drying device, which relates to the technical field of perlite plates, and comprises a workbench, a processing groove is arranged on the upper surface of the workbench, a conveying mechanism is arranged in the processing groove, a placing frame is movably arranged in the processing groove, the placing frame and the conveying mechanism are connected in a clamping manner, and the conveying mechanism is connected with the workbench in a clamping manner. And a plurality of raw materials are mounted at the upper end in the placement frame. Raw materials which are just pressed are respectively placed in the placing frames by a user to be stored, so that the situation that the raw materials are locally suspended or fractured due to vibration when the raw materials are transported by the user through a trolley is avoided, and then the raw materials are conveyed by the user through the cooperation of the first teeth and the second teeth. And a conveying belt is replaced to control the placement frame and the raw materials to move, so that the stability performance in the moving process of the placement frame is improved, and the microwave dryer can more stably and quickly dry the raw materials.