269 results about "Barium sulphate" patented technology

The invention belongs to the technical field of drilling fluid, and particularly relates to a free radical polymerization water-based drilling fluid composition and a preparation method thereof. The invention relates to a core-shell composite particle-containing water reducer which comprises deionized water, salts (NaCl / KCl), alkalis (Na2CO3 and NaOH), barium sulfate and core-shell composite particles X. The particle is composed of a silicon dioxide core and a polymer shell layer, and the shell layer is formed by free radical copolymerization of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid and is covalently connected with the core through silanization treatment. Under the conditions of high salinity, strong alkali and high solid phase weighting, the drilling fluid simultaneously realizes the following effects: (1) high-density bearing and low-viscosity pumpability are realized; (2) compact plugging and water loss reduction and low formation damage flowback can be realized; and (3) stable rheology rock carrying, lubrication and friction resistance reduction. The problem that three aspects of performance are difficult to consider in the prior art is solved, and the drilling fluid is suitable for drilling of deep wells, ultra-deep wells and complex stratums and has remarkable industrial application value.

The invention relates to the technical field of sound insulation materials, in particular to a high-performance sound insulation material for buildings and a preparation method thereof, and the high-performance sound insulation material comprises the following raw materials in parts by weight: 60-80 parts of polypropylene, 15-25 parts of filler, 10-20 parts of talcum powder, 5-15 parts of flexibilizer, 0.2-1 part of antioxidant and 0.2-0.4 part of light stabilizer. According to the invention, the SEBS with high damping performance is utilized to provide a main viscoelastic effect, and the density performance of the material can be directly increased by combining the barium sulfate material with high density, so that the low and medium frequency sound insulation function is improved, and the hollow glass beads can utilize the spherical surfaces to cause scattering and refraction of sound waves and disturb the propagation direction of the sound waves in the hollow glass beads; meanwhile, in cooperation with the high radius-thickness ratio state of the mica sheet, sound waves are further dispersed and refracted in combination with the hollow glass beads, the conduction path of the sound waves is prolonged, and therefore the medium-high frequency sound insulation performance is improved, and the sound insulation performance of the material is effectively improved.

This application discloses a method for producing an anticorrosion coating having excellent adhesion to rusted, low-treatment surfaces, which relates to the field of paint chemical industry. The anticorrosion coating comprises Component A and Component B, where Component A comprises an epoxy resin, double-coated hollow glass microbeads, a thixotropic agent, a wetting and dispersing agent, a pigment, barium sulfate, talc, Solvent A, an antifoaming agent, a first silane coupling agent, and an aluminum powder paste, and Component B comprises a curing agent, an accelerator, and Solvent B.

The invention provides a long-acting anticorrosive epoxy powder coating and a preparation method thereof. The coating comprises epoxy resin, polyester resin, thiadiazole corrosion inhibitor loaded cerium-doped hydrotalcite composite particles, silane modified mica iron oxide, zinc phosphate, barium sulfate and the like. The core innovation lies in that 2-amino-5-(4-hydroxyphenyl)-1, 3, 4-thiadiazole corrosion inhibitor molecules are designed and synthesized, the molecules are loaded between cerium-doped magnesium-aluminum hydrotalcite nano container layers through an anion exchange method, corrosion environment pH responsive gradient release is achieved, a coating constructs a passive shielding, active corrosion inhibition and interface anchoring triple protection mechanism in the coating, and the corrosion resistance of the coating is improved. The neutral salt spray test resistance exceeds 2000h, and the coating is suitable for long-acting corrosion protection of iron accessories and cable bridges.

The invention provides a powder coating gypsum board with scratch resistance and a preparation method thereof, and belongs to the technical field of paints.The preparation method comprises the following steps that modified polyester, modified glass beads, polytetrafluoroethylene, barium sulfate, titanium dioxide, a flatting agent and a curing agent are mixed and stirred, melt extrusion is conducted, tabletting is conducted after cooling, smashing, grinding and sieving are conducted, and the powder coating gypsum board is obtained. Powder coating is obtained; and sanding and dedusting the surface of the gypsum board substrate, electrostatically spraying the powder coating onto the surface of the substrate, heating, curing and cooling to obtain the gypsum board. Wherein the modified polyester is prepared from polyester, a reinforcing agent and 3-glycidyl ether oxypropyl triethoxy silane. The powder coating gypsum board prepared by the invention has excellent scratch resistance, impact resistance and wear resistance.

The invention belongs to the technical field of plastic filling modification, and discloses a high-specific-gravity polypropylene filling master batch and a preparation method thereof. The high-specific-gravity polypropylene filled master batch is mainly prepared from the following raw materials in parts by mass: 8-28 parts of polypropylene, 70-92 parts of modified barium sulfate powder, 1-4 parts of a lubricant, 4-8 parts of a titanate coupling agent, 3-6 parts of zinc stearate and 0.5-2 parts of an antioxidant. The barium sulfate powder subjected to surface modification treatment is added into the polypropylene master batch, so that the polypropylene master batch has very high specific gravity and can be filled and modified in various high polymer material products with specific gravity requirements.

The invention relates to the technical field of environment-friendly epoxy resin coatings, in particular to an environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive coating and a preparation method of the environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive coating. The component A is prepared from the following raw materials in parts by weight: 30 to 50 parts of waterborne epoxy resin emulsion, 0.4 to 0.8 part of dispersing agent, 0.3 to 0.5 part of flatting agent, 0.3 to 0.5 part of defoaming agent, 0.4 to 0.8 part of wetting agent, 0.4 to 0.6 part of thickening agent, 5 to 10 parts of anti-rust pigment, 0.3 to 0.5 part of anti-flash-rust agent, 3 to 5 parts of precipitated barium sulphate, 8 to 10 parts of modified filler and 10 to 30 parts of deionized water; the component B comprises the following raw materials in parts by weight: 3-5 parts of an epoxy curing agent and 4-6 parts of deionized water; the molar ratio of epoxy groups in the water-borne epoxy resin emulsion to amino groups in the epoxy curing agent is 1: (1.1-1.3). The epoxy resin coating prepared by the invention has excellent high temperature resistance, wear resistance and corrosion resistance.

The invention discloses a low-energy-consumption polyurethane powder coating and a preparation method thereof, and belongs to the technical field of polyurethane powder coatings. Comprising the following raw materials in parts by weight: 60-70 parts of polyester polyol, 10-20 parts of a closed HDI tripolymer, 5-10 parts of a flame retardant aid, 1-2 parts of a flatting agent, 2-3 parts of an anti-yellowing agent, 0.5-1.5 parts of a dispersing agent, 0.4-0.8 part of a degassing agent and 8-12 parts of superfine barium sulfate. The low-hydroxyl-value polyester polyol and the closed HDI tripolymer are matched for use, so that the temperature and time required in the curing process are greatly reduced, and the energy consumption is reduced; the self-made flame-retardant additive can effectively improve the flame-retardant property of the coating, reduce the fire risk and prolong the service life; in conclusion, the prepared coating achieves the dual purposes of energy conservation, environmental protection, safety and flame retardance, and has important application value in the field of polyurethane powder coatings.

The application relates to the field of shoe-making moulds and high polymer foaming forming technology, and discloses a running type basketball shoe tree and a production process thereof. The shoe tree is made of raw materials containing the following components by weight: high-density polyethylene, ethylene-1-octene copolymer, precipitated barium sulfate, dicumyl peroxide, divinylbenzene and powder pre-dispersed foaming agent. The production process of the shoe tree comprises the following steps: constant temperature closed mixing, melt extrusion and air cooling and granulation of all the materials to obtain base rubber particles, injection of the rubber particles into a mould after heating to complete chemical crosslinking and microporous foaming, superposition of a sinusoidal servo pressure maintaining flow field on the material to implement mechanical kneading of the material to promote molecular chain segment relaxation and rearrangement when the temperature is lowered to the semi-cured window period, and finally forced cooling and shaping in a tree to obtain the shoe tree. Through polymer blending and heterogeneous nucleation, and in combination with the sinusoidal servo flow field mechanical kneading to eliminate residual stress, the size precision and mechanical support consistency of the shoe tree are improved.

The present application relates to the technical field of lead-acid battery preparation, and particularly relates to a green plate gel battery and a preparation process thereof, which comprises positive plate lead paste and negative plate lead paste, the positive plate lead paste comprises the following components: lead powder 100 parts, short fiber 0.08-0.12 parts, sulfuric acid 6.5-8.0 parts, and water 11-14 parts; the negative plate lead paste comprises the following components: lead powder 100 parts, sulfuric acid 5-6 parts, short fiber 0.05-0.1 parts, composite activated carbon 0.5-3 parts, sodium lignosulfonate 0.6-0.8 parts, barium sulfate 0.2-0.4 parts, humic acid 0.1-0.3 parts, and water 11-14 parts. The gel battery prepared by introducing the composite activated carbon into the negative plate lead paste and synergizing with the composite expansion agent system has a significant improvement in initial capacity and deep cycle life.

The invention provides a method and a system for recovering chromium and aluminum from a waste chromium catalyst. The method comprises the following steps: carrying out alkali fusion reaction on the waste chromium catalyst and sodium hydroxide to obtain alkali fusion clinker; mixing the alkali fusion clinker with water, pulping, leaching, and carrying out solid-liquid separation to obtain a water leaching solution containing Na2CrO4 and NaAlO2 and a filter cake containing Al2O3; adding a barium salt solution or solid into the aqueous extract containing Na2CrO4 and NaAlO2, reacting to generate a BaCrO4 precipitate, and carrying out solid-liquid separation to obtain a BaCrO4 filter cake and a sodium metaaluminate filtrate; reacting the BaCrO4 filter cake with an inorganic acid, and carrying out solid-liquid separation to obtain a chromic acid solution and a barium sulfate precipitate; and adding an acid solution into the sodium metaaluminate filtrate, adjusting the pH value to 7-8, and carrying out solid-liquid separation to obtain an Al (OH) 3 filter cake. According to the method, Cr (III) in the waste catalyst is directionally converted into Cr (VI) through an alkali fusion oxidation process, then the solubility difference of sodium chromate and sodium metaaluminate in an aqueous solution is fully utilized, the high-selectivity separation characteristic of barium chromate precipitation is combined, the chromium-aluminum separation problem is fundamentally solved, and the finally obtained product is excellent in purity.

The invention provides a modified nano composite material, a preparation method of the modified nano composite material and a brake pad prepared from the modified nano composite material. The composite material comprises the following raw materials: 20-30 parts of an interpenetrating network polymer, 10-18 parts of a double-core self-repairing microcapsule, 4-8 parts of silane modified nano-zinc oxide, 1-3 parts of copper fibers, 8-15 parts of a wear-resistant filler, 6-12 parts of crystalline flake graphite, 5-10 parts of barium sulfate, 7-13 parts of potassium titanate whiskers, 1-2 parts of a release agent and 2-4 parts of a curing agent. According to the invention, the brake pad has good corrosion resistance, friction stability, mechanical properties and self-repairing capability.

The invention discloses a method for determining barium sulfate in fluorite mine. The method comprises hydrochloric acid, nitric acid, hydrofluoric acid, sulfuric acid-hydrochloric acid mixed acid, ammonium acetate and sulfuric acid. The determination method of barium sulfate in fluorite mine comprises the following steps: S1, reagent proportioning; s2, selecting an instrument; s3, preparing a sample; s4, step analysis; s5, calculating a result; and S6, matters needing attention. The invention belongs to the technical field of mineral composition analysis, and particularly relates to a method for measuring barium sulfate in fluorite mine, which comprises the following steps: firstly, treating a sample with hydrochloric acid, nitric acid and hydrofluoric acid, evaporating to be nearly dry, dissolving soluble salts with a hydrochloric acid-sulfuric acid mixed solution, then filtering, burning filter residues, and finally weighing to obtain the weight of barium sulfate. The method is simplified and optimized on the basis of a national standard method, the method is convenient and fast to operate, the time is greatly shortened, and the result is stable. The method is suitable for the fields of mine production, laboratory rapid detection and the like.

The invention discloses a special modified submicron antimony-based composite flame retardant for ABS (Acrylonitrile Butadiene Styrene). The special modified submicron antimony-based composite flame retardant is prepared from the following raw materials in parts by mass: 40 to 50 parts of submicron antimony trioxide, 20 to 25 parts of composite magnesium aluminum silicate, 20 to 25 parts of composite hydrophosphate, 2 to 5 parts of barium sulfate, 2 to 5 parts of superfine aluminum hydroxide and 2 to 5 parts of superfine magnesium hydroxide. Taking CTAB (cetyltrimethyl ammonium bromide), composite magnesium aluminum silicate and sodium stearate, mixing and reacting to obtain modified composite magnesium aluminum silicate; taking a silane coupling agent, submicron antimony trioxide and the modified composite magnesium aluminum silicate salt to react to obtain modified submicron antimony trioxide; taking a silane coupling agent, composite hydrophosphate and stearic acid to react to obtain modified composite hydrophosphate; finally, the modified submicron antimony trioxide, the modified composite hydrophosphate and the remaining raw materials are evenly mixed to obtain the special modified submicron antimony-based composite flame retardant for ABS, the special modified submicron antimony-based composite flame retardant for ABS has the good flame retardant effect and smoke suppression effect, and an ABS material prepared by mixing the special modified submicron antimony-based composite flame retardant with ABS resin can be used for production of new energy automobile key assemblies and high-end electronic and electrical components.

The invention discloses a graphene electrode material of a lead-acid storage battery and a preparation method of the graphene electrode material, and belongs to the technical field of electrode materials. The preparation method is used for solving the technical problem that the conductivity, the specific surface area, the first coulombic efficiency and the first discharge specific capacity of a graphene electrode material of a lead-acid storage battery in the prior art need to be further improved. Comprising the following components in parts by weight: 1000 parts of lead powder, 8-15 parts of barium sulfate, 3-8 parts of modified humic acid, 2.5-4 parts of modified lignin, 3-7 parts of carbon black, 3-10 parts of 3-10 graphene, 5-10 parts of modified graphite, 0.8-1.5 parts of a tin dioxide compound, 0.8-1.2 parts of carbon fibers, 3.5-5 parts of sulfuric acid and 12-15 parts of deionized water. Through the synergistic effect of the substances, the conductivity, the specific surface area, the first coulombic efficiency and the first discharge specific capacity of the electrode material are jointly improved.

The invention provides a barium chloride production waste residue treatment method, and relates to the technical field of barium chloride production waste residue treatment, and the barium chloride production waste residue treatment method comprises the following steps: S1, carrying out ball milling on waste residues containing barium sulfate and barium sulfide, and then carrying out pre-oxidation and hydration treatment to obtain a barium hydroxide-containing turbid liquid; s2, dehydrating and drying the turbid liquid in the S1; s3, mixing and calcining the dried material and sodium carbonate to obtain a calcined product containing barium carbonate; s4, the calcined product is subjected to hot water leaching to remove soluble sodium salt, and water leaching residues are obtained; s5, first-stage acid leaching is conducted on the water leaching residues through low-concentration hydrochloric acid, and first-stage leaching liquid and first-stage filter residues are obtained through filtering; performing second-stage acid leaching on the first-stage filter residue by using high-concentration hydrochloric acid, and filtering to obtain a second-stage leaching solution; and S6, combining the first-stage leaching solution and the second-stage leaching solution, adjusting the pH value to 4.0-5.0, filtering and separating precipitates, and concentrating and crystallizing to obtain a barium chloride product. According to the method, efficient conversion and resource utilization of barium in the waste residues are achieved through the processes of pre-oxidation toxicity control, calcination conversion, gradient acid leaching and deep purification.

The application relates to the technical field of high polymer materials, in particular to a non-silicon release liquid and a release film, wherein the non-silicon release liquid comprises the following components in proportion by weight: a non-silicon release agent 18-36 parts; modified barium sulfate 2-4 parts; toluene 58.5-79.5 parts; a wetting agent 0.5-1.5 parts. The non-silicon release liquid provided by the application has excellent release performance through the synergistic effect among the components, and the non-silicon release agent can be combined with the PET base material through a chemical bond, so that the addition of the non-silicon release agent does not affect the mechanical properties of the film.

The application discloses a white hypromellose hollow capsule, a preparation method and application thereof, and the composition of the hollow capsule comprises the following components in percentage by weight: 10-35 parts of hypromellose, 0.1-3 parts of a gelling agent, 0.2-3 parts of a complexing agent, 0.1-3 parts of a phosphate, 0.05-1 parts of an emulsifying agent, 0.05-1 parts of a coagulant, 0.01-1 parts of starch, 0-2 parts of a pigment, and the rest is water. The application discloses a white hypromellose hollow capsule with a whitening effect, which is obtained by adding the complexing agent and the phosphate and controlling the drying temperature and the drying time, and does not contain white pigment light-proof agents such as titanium dioxide, zinc oxide, calcium carbonate, barium sulfate and magnesium oxide. The hollow capsule has the advantages of uniform surface, good gloss, good uniformity, good light-proof property, small capsule weight difference, market demand satisfaction, and application in the fields of medicines and health products.

The invention provides a composition for a thermal insulation product with embossments, a rubber and plastic product and a preparation method. The composition comprises the following raw materials in parts by weight: 12.5-16.5 parts of aggregate; 11 to 15.5 parts of an auxiliary polymer; 25.8 to 32 parts of filler; 0.05 to 0.14 part of an anti-aging agent; 2-3 parts of a reinforcing agent; 0.07 to 0.19% of a vulcanizing agent; 0.15 to 0.45 part of a vulcanization accelerator; 0.14 to 0.32% of an active agent; 9-12 parts of a foaming agent; 2-3.5 parts of a nucleating agent; 1.2 to 2.1 parts of a coupling agent; 19-24 parts of a plasticizer; 1.56 to 3.43 parts of a lubricant; 0.9 to 1.5 parts of a flame retardant; wherein the aggregate comprises nitrile rubber and TPE (Thermoplastic Elastomer); the filler comprises at least one of barium sulfate, titanium dioxide and aluminum hydroxide; the nucleating agent comprises white carbon black; the coupling agent comprises an aluminate ester. According to the invention, the defects in the prior art are fundamentally solved, the noise reduction coefficient of the rubber and plastic product is also improved, and the performance balance of high strength, high three-dimensional property and high noise reduction property is realized.

The invention discloses a two-component waterborne epoxy graphene primer suitable for shower coating. The two-component waterborne epoxy graphene primer comprises a component A and a component B, the component A is prepared from the following ingredients in percentage by mass: 40 to 60 percent of waterborne epoxy emulsion, 3 to 8 percent of coalescing agents, 1 to 3 percent of dispersing agents, 2 to 5 percent of graphene dispersing slurry, 0.1 to 1 percent of base material wetting agents, 5 to 15 percent of pigments, 0 to 10 percent of talcum powder, 0 to 10 percent of precipitated barium sulphate, 5 to 10 percent of anti-rust auxiliaries, 0.2 to 1.5 percent of anti-flash-rust auxiliaries, 0.5 to 1.0 percent of thixotropic agents and 5 to 15 percent of water; the component B comprises 45-55% of a curing agent, 15-25% of a cosolvent and 30-40% of water, and the mass ratio of the component A to the component B is 8: 1. The primer disclosed by the invention has the advantages of strong corrosion resistance, good adhesive force, strong defoaming capability and single-channel film thickness of more than 70 microns.

The utility model discloses an anti-radiation lead sliding door which comprises a concrete wall body arranged at the top of a concrete ground, a hanging bar is fixedly installed at the top of the concrete wall body, a keel is installed at the bottom of the hanging bar, and the bottom of the keel is fixedly connected with a double-layer paper surface gypsum board through screws. A white antibacterial inorganic coating is laid at the bottom of the double-layer gypsum plaster board, a flame-retardant board base layer is installed on the right side of the concrete wall body, and a grain ice fire board is laid on the surface of the flame-retardant board base layer. The double-layer paper surface gypsum board, the white antibacterial inorganic coating, the first black wiredrawing stainless steel, the barium sulfate coating layer and the second black wiredrawing stainless steel are used in cooperation, the overall attractiveness of the ionizing radiation lead sliding door after installation can be improved, the whole installation is easy, construction of workers is facilitated, and through the arrangement of the sliding door limiter, the service life of the ionizing radiation lead sliding door is prolonged. Sliding of the ionizing radiation lead sliding door can be limited, so that the ionizing radiation lead sliding door slides according to a limited track.

The invention discloses a solid conductive powder coating composition and a preparation method thereof, and belongs to the technical field of powder coatings. The preparation method comprises the following steps: adding epoxy resin, modified fibers, modified graphene oxide, modified 1, 6-dihydroxynaphthalene, carbon black, 2-methylimidazole, a flatting agent and barium sulfate into a stirrer, mixing at a high speed of 300-400r / min for 5-10min, then putting the mixed material into a double-screw extruder for melt extrusion, tabletting, cooling, crushing and sieving to obtain the solid conductive powder coating composition. The solid conductive powder coating composition disclosed by the invention has good conductivity and also improves the corrosion resistance.

The invention relates to waterproof tough glaze paint as well as a preparation method and application thereof. The waterproof tough glaze paint is prepared from a component A and a component B, the component A comprises the following components in parts by weight: 60-72 parts of first aliphatic isocyanate, 28-40 parts of second aliphatic isocyanate, 6-10 parts of a diluent and 1-3 parts of a coupling agent; the component B is prepared from the following components in parts by weight: 20 to 32 parts of first water-based aliphatic polycarbonate dispersion, 20 to 28 parts of second water-based aliphatic polycarbonate dispersion, 15 to 25 parts of titanium dioxide, 4 to 10 parts of barium sulfate, 1 to 3 parts of organic silicon emulsion, 1 to 3 parts of auxiliaries and 15 to 30 parts of deionized water; the mass ratio of the component A to the component B is 1: (11-19). The waterproof tough glaze paint provided by the invention has good adhesive force with a ceramic tile glaze surface, and has anti-cracking and waterproof properties and self-cleaning and stain-resistant properties.

This invention belongs to the field of polymer composite materials and discloses a barium sulfate surface treatment aid, its preparation method, its application, and a barium sulfate-filled polyolefin elastomer material. The barium sulfate surface treatment aid comprises a block copolymer composed of polyethylene glycol monomethyl ether (mPEG) and methyl methacrylate (MMA), wherein the molar ratio of mPEG to MMA is 1:1-4, and the theoretical molecular weight of the barium sulfate surface treatment aid is 300-600. This invention prepares an mPEG-MMA block copolymer composed of polyethylene glycol monomethyl ether (mPEG) and methyl methacrylate (MMA) through oxyanionic polymerization. This copolymer can be fully incorporated into the barium sulfate surface as a barium sulfate surface treatment aid, reducing its hydrophilicity and overcoming the characteristic of barium sulfate's poor compatibility with polymers. This allows the surface-treated barium sulfate to fully combine with the polyolefin elastomer components and achieve highly uniform dispersion, further improving the overall performance of the barium sulfate-filled polyolefin elastomer material.

The utility model relates to an anti-radiation operating room which comprises a wall anti-radiation structure and a ground anti-radiation structure, and the operating room is defined by the wall anti-radiation structure, the ground anti-radiation structure and the ground anti-radiation structure of an upper floor. The wall anti-radiation structure comprises a keel frame, an anti-radiation lead plate, a fireproof rock wool layer and a gypsum board, the keel frame is a wall body, and the inner face of the keel frame is sequentially connected with the anti-radiation lead plate, the fireproof rock wool layer and the gypsum board; the ground anti-radiation structure comprises a floor and a barium sulfate cement layer, the barium sulfate cement layer is arranged on the floor, the inner wall of the operating room is subjected to anti-radiation protection in all directions, the fireproof rock wool layer has a fireproof function, and the gypsum board has a sound insulation effect.

The utility model provides a nano barium sulfate drying device. The nano barium sulfate drying device comprises a dryer, a spiral separator and a bag-type dust collector, a dispersing motor is mounted at the top of a tank body of the dryer; a frame-shaped disperser is arranged on a rotating shaft of the dispersing motor; a feeder is arranged at a discharging port of the feeding hopper, a discharging port of the feeder penetrates through the tank wall of the upper portion of the dryer and extends to the position above the disperser, and filter cloth is arranged on the lower portion of the dryer. The annular pipe is arranged on the periphery of the lower portion of the dryer, one end of the diameter pipe is connected with the annular pipe, and the other end horizontally penetrates through the tank wall of the dryer and is internally tangent to the inner wall of the tank. According to the device, agglomerated particles can be scattered, dry nano barium sulfate particles can be carried out in time and separated and collected by adjusting the flow speed of high-temperature air flow and arranging the dust removal device, all the nano barium sulfate is recycled, and tail gas is free of dust emission. The device can be used for quickly and efficiently drying nano barium sulfate particles, and the production efficiency is improved.

This invention discloses a topical plaster for external injuries, relating to the field of traditional Chinese medicine compositions. It comprises the following raw materials by weight: camphor 42.2-43.0 parts, Panax notoginseng 2.0-3.0 parts, safflower 4.0-6.0 parts, lead oxide 6.4-7.0 parts, white oil 4.0-6.0 parts, calcium carbonate 8.6-9.0 parts, barium sulfate 1.1-2.0 parts, talc 4.8-5.2 parts, sodium dihydrogen phosphate 4.4-5.0 parts, alum 0.4-0.6 parts, vegetable oil 4.0-6.0 parts, and water 12.3-13.0 parts. This topical plaster has excellent effects in reducing swelling and pain, and promoting blood circulation and removing blood stasis.

To provide a multi-component organic solvent-based primer paint composition that has good finish and adhesion, and excellent substrate opacity and drying properties, and a repair painting method using the same. [Solution] A multi-component organic solvent-based primer paint composition obtained by mixing a main component (I) and a curing agent component (II), wherein the main component (I) comprises an acrylic polyol (A), a pigment composition (B), and an organic solvent (C), the curing agent component (II) comprises a polyisocyanate compound, the acrylic polyol (A) contained in the main component (I) comprises an acrylic polyol (A1) with a glass transition temperature of 40 to 70°C and an acrylic polyol (A2) with a glass transition temperature of 0 to 30°C, and the pigment composition (B) contained in the main component (I) contains barium sulfate and clay as part of its components.

The application discloses a water-based color paint with high wettability on sealant and application thereof. The water-based color paint comprises, in parts by weight, 20-25 parts of acrylic resin, 0.3-1.0 parts of phosphoric acid modified acrylic resin, 3-10 parts of amino resin, 3-5 parts of polyurethane resin, 3-5 parts of polyester resin, 2-8 parts of pigment, 2-8 parts of functional filler paste, 3-12 parts of auxiliary agent, 5-10 parts of organic solvent and 30-50 parts of water, wherein the functional filler paste is a semi-finished product obtained by pre-mixing superfine nano barium sulfate, acrylic resin B and water. By adding the functional filler paste containing the superfine nano barium sulfate in the water-based color paint formula, the wettability problem of the water-based color paint on the sealant for automobiles, especially the wettability problem of the sealant at a brush mark, can be effectively solved, and meanwhile, the requirements on the paint film performance such as the paint film adhesion and appearance in application can be met.

The invention discloses a rare earth radioactive slag reduction and barium sulfate slag recycling method based on transformation and decomposition of barium sulfate. The method comprises the following steps: drying, ball-milling and screening rare earth radioactive slag, adding water into sodium hydroxide, and mixing to obtain rare earth slag; roasting and transforming the rare earth slag under the condition of introducing carbon dioxide; washing the roasted and transformed rare earth slag with water; the washed rare earth slag is subjected to acid dissolution and solid-liquid separation, and high-silicon slag without radioactive elements and an acid solution with the radioactive elements are obtained; sulfuric acid is added into the acid solution step by step for fractional precipitation and radium removal, and barium and radium residues containing radioactive elements and barium sulfate residues without radioactivity are obtained through solid-liquid separation; adjusting the mass ratio of the barium sulfate slag and sodium hydroxide, then carrying out alkali conversion and acid dissolution to obtain a barium chloride solution, and recycling the barium chloride solution for removing sulfate radicals from the rare earth feed liquid. According to the method, barium sulfate in the rare earth radioactive slag can be transformed into more than 95% of soluble barium salt, the amount of the rare earth radioactive slag is reduced by more than 85%, and the barium circulation rate reaches more than 90%.