32results about How to "Liquidity impact" patented technology

The invention discloses a heat-conductive silicone grease composition being high in heat conductivity and low in viscosity and freeness degree, and a preparation method of the silicone grease composition. The heat-conductive silicone grease composition includes organo-polysiloxane, heat conductive filler and other additives. By selecting the heat conductive fillers in multiple dimensions (one-dimension, two-dimension and three-dimension) and multiple scales (micron, submicron and nanometer) and in special ranges, synergistic effect among the multi-dimension and multi-scale fillers is achieved,thus achieving compact stack of the fillers in a local network structure. The heat-conductive silicone grease not only is improved in heat-conductivity but also has good flowability, low viscosity and low freeness degree.

The invention discloses a metal powder material for 3D printing, a preparation method of the metal powder material and a 3D printing method. The preparation method of the metal powder material for 3D printing comprises the following steps that iron-base alloy powder with the grain sizes ranging from 20 micrometers to 60 micrometers is used as a base body, iron oxide powder and carbon powder with the grain sizes ranging from 50 nanometers to 2 micrometers are used as additives, the powder is evenly mixed, and the metal powder material is obtained; the mass ratio of the iron oxide powder and the carbon powder is within the range of 4.4:1-8.8:1, and the ratio of the sum of the mass of the iron oxide powder and the mass of the carbon powder to the mass of the iron-base alloy powder is within the range of 1:100-1:400. After the metal powder material is prepared, the metal powder material is printed to be a three-dimensional blank through a micro-jetting bonding 3D printing method; the three-dimensional blank is subjected to degreasing sintering, the sintering temperature is no lower than 900 DEG C, and a 3D printing product is obtained. The metal powder material is used in the 3D printing method, and therefore the obtained printing product is high in compactness.

The invention provides drinking yoghourt and a making method thereof. The drinking yoghourt comprises the following ingredients: 18.5-25% of total solid matter, 2.5-3.0% of milk fat and 2.3-2.7% of milk protein; the drinking yoghourt of the invention also comprises the ingredient of sweetening agent of which the sweetness is equal to that of 6-9% of cane sugar. The drinking yoghourt of the invention is made through the steps of mixing all ingredients, homogenizing, sterilizing, cooling, inoculating lactic acid bacteria fermentation agent and homogenizing fermented yoghourt material. In the invention, by reasonably selecting and proportioning the formula of the drinking yoghourt and controlling proper production process, the drinking yoghourt obtained by production has good flowability, and simultaneously has good flavor and mouth feel and good stability.

The invention belongs to the field of casting and particularly relates to high-fluidity phosphate inorganic binder sand and a preparation method thereof. The high-fluidity phosphate inorganic binder sand comprises, by mass, 2500 parts of burnt sand, 100 parts of a phosphate inorganic binder, 8 parts of a metallic oxide curing agent and 5 parts of an addition agent. The addition agent comprises a solution prepared by one or more nonionic surface active agents such as alkyl glycoside, 1-61, 1-62, S-80 and MOA-9P, and silicon dioxide with the granularity at 400-1200 meshes and mixed with the solution; and the weight ratio of the nonionic surface active agents to the silicon dioxide is 1:5-1:3. According to the high-fluidity phosphate inorganic binder sand and the preparation method thereof, while the inherent advantages of cleanliness and environment protection, good collapsibility, high strength and the like of the phosphate binder sand are maintained, the fluidity of the phosphate binder sand is greatly improved, and requirements for novel green casting materials and a casting method in modern casting production are met.

The invention discloses a preparation method and an application of quaternary ammonium epoxy siloxane particles. The preparation method comprises the following steps: 1, adding tetraethyl orthosilicate, gamma-glycidoxypropyltrimethoxysilane and dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride to a reaction container containing ethanol, fully dissolving, adding dilute hydrochloric acid, and reacting for 1-5min; 2, adding a sodium hydroxide solution to the reaction container, and reacting under stirring for 1-3h; and 3, centrifuging solids obtained after the reaction in step 2, and drying. The quaternary ammonium epoxy siloxane particles can be applied in oral antibiotic medicines. Quaternary ammonium epoxy siloxane obtained in the invention endows an epoxy resin material with non-release durable antibiotic performance, can kill bacteria residual on the root canal in the root canal treatment process, and has a bacterium reinfection prevention effect after treatment.

An apparatus used for measuring a filling slurry pipeline resistance loss parameter and a method thereof are disclosed. The apparatus comprises an L-shaped pipe, a stirring device, a speed regulation pressure pump, an electromagnetic flowmeter, a moving support seat and a conveying flexible pipe. The stirring device and the speed regulation pressure pump are installed on and fixed to the moving support seat. The stirring device is arranged below a tail end of a horizontal segment of the L-shaped pipe. The horizontal segment of the L-shaped pipe is formed by several short circuits. Internal diameters of each part of the L-shaped pipe are the same. A top end of a vertical segment of the L-shaped pipe is provided with a feed hopper. The feed hopper is provided with a limiting line. One end of the speed regulation pressure pump is connected to the stirring device and the other end is connected to the feed hopper through the conveying flexible pipe. The electromagnetic flowmeter is installed on the conveying flexible pipe. The invention also comprises a method of measuring the filling slurry pipeline resistance loss parameter. By using the apparatus and the method of the invention, measurement accuracy is high; calculating is simple; a land occupation area is small; a test period is short; test cost is low and material adoption is less.

The invention relates to a mineral additive for shotcrete as well as a preparation method and application of the shotcrete. The mineral additive comprises the following components in percentage by weight: 60%-90% of clinker containing aluminum active minerals, 10%-35% of gypsum and 0-5% of chemical additive. A concrete accelerator comprises a liquid accelerator and the shotcrete mineral additive which are respectively added into concrete at different moments. According to the invention, when the wet-spraying concrete is sprayed out, the reaction can be quickly generated, the solid-to-liquid ratio is quickly increased, the concrete is quickly tackified and quickly coagulated and hardened, hydrated minerals generating strength are continuously increased, the strength is continuously improved, hydrated slurry is more compact, the durability such as later strength, sulfuric acid corrosion resistance and the like is greatly improved, and therefore, the common problem of wet shotcrete is fundamentally solved.

The invention relates to a method for separating materials, according to which a mixture of materials is guided through a channel in a direction of flow that is at least substantially parallel to the gravitation field. A wash fluid is transported through the channel in a direction transverse to the direction of flow of the mixture of materials and is used to displace and to remove from the channel at least one material component of the mixture of materials. The invention further relates to a device that is especially suitable for carrying out the inventive method.

The invention belongs to the field of instruments and meters, and particularly relates to a leading type magnetic impurity removal device for an electromagnetic flowmeter and a using method of the leading type magnetic impurity removal device. The invention discloses a leading type magnetic impurity removal device for an electromagnetic flowmeter. The leading type magnetic impurity removal device comprises a connecting pipe, an adsorption device and permanent magnet particles. The connecting pipe comprises a pipe body and flange plates installed at the two ends of the pipe body. The connecting pipe is assembled into a pipeline for conveying fluid to be detected through the flange plate, so that the fluid flows through the pipeline in the connecting pipe. The adsorption device comprises a curved-surface substrate, the curved-surface substrate is matched with the inner wall of the connecting pipe, and the curved-surface substrate is made of magnetic conductive materials. A plurality of deformation parts recessed towards the inner side of the pipeline are distributed on the surface of the curved-surface base plate, and mounting grooves are formed in the back faces of the deformation parts. And the permanent magnet particles are detachably embedded into the mounting grooves in the adsorption device. The electromagnetic flowmeter solves the problem that the measurement precision of an existing electromagnetic flowmeter is prone to being affected by magnetic conductivity impurities in fluid, and has the advantages of being convenient to install and maintain.

The invention belongs to the technical field of inorganic material preparation, and discloses a method for preparing a silicon carbide powder as an organic composite material reinforcement. The methodcomprises the following steps: firstly feeding a silicon carbide powder raw material into a ball mill for shaping treatment; pre-heating the shaped silicon carbide powder at 60 DEG C to 80 DEG C for20 min to 30 min, and spraying a modifier into the silicon carbide powder stirred at a high speed in a mist form at a controlled temperature of 100 DEG C to 120 DEG C, performing standing for 2 h-3 hevery time after stirring and drying are carried out for 20 min-30 min, and performing stirring for 4 times, so as to obtain a preliminarily modified silicon carbide powder; and finally, dip-coating the preliminarily modified silicon carbide powder in a strengthening agent, so as to obtain a modified silicon carbide powder. The method of the invention can effectively improve the affinity of the silicon carbide powder and an organic composite material, improve the compatibility and dispersibility of the silicon carbide powder during filling, and improve the comprehensive performance of the product, and the process is simple and easy to control.

The invention relates to a preparation method for a high-solid-content low-viscosity polyacrylamide emulsion. According to the preparation method provided by the invention, a 30%-50% monomer aqueous solution is added into an oil phase system composed of an emulsifier, solvent oil and an azo initiator, a polymerization reaction is performed, the adding amount of a monomer is controlled to account for 20-30% of the total weight of the emulsion, the polymerization heat released in the preparation process is reduced, and the safety hazards are eliminated; and vacuum distillation is performed on the emulsion after polymerization is completed, the water content in the product is reduced, and the solid content of the product is improved. The polyacrylamide emulsion prepared by the preparation method reduces the viscosity and coagulation point of a high-solid-content emulsion product, solves the problems that the high-solid-content emulsion product has residues and accumulation in a medicine adding pump and a pipeline during field use, and finally the blocking is caused, and ensures that the field production is successively performed. The high-solid-content low-viscosity polyacrylamide emulsion product prepared by the method can be widely applied in various fields such as water treatment, papermaking and oil field mining.

The invention relates to the field of building materials, and particularly discloses lightweight aggregate concrete and a preparation method thereof. The lightweight aggregate concrete is prepared from the following raw materials in parts by weight: cement, an admixture, machine-made sand, stone powder, surface modified ceramsite, fine stone, polytetrafluoroethylene fibers, water and a water reducing agent, the surface modified ceramsite is obtained by performing surface modification on ceramsite through fireproof resin and potassium perfluorobutanesulfonate; the preparation method comprises the following steps: mixing and stirring the cement, the admixture, the machine-made sand, the stone powder and the fine stone to obtain a solid mixture; adding the rest raw materials except the surface modified ceramsite and the polytetrafluoroethylene fiber into the solid mixture, and stirring to obtain concrete slurry; and adding the surface modified ceramsite and polytetrafluoroethylene fiber into the concrete slurry, and stirring to obtain the concrete. According to the lightweight aggregate concrete disclosed by the invention, the high-temperature resistance of the concrete is improved; according to the preparation method, the possibility that an organic film on the surface of the surface modified ceramsite is abraded is reduced.

The invention relates to a preparation method of a ceramic blank enhancer with decondensation effect on slurry and an application method of a product thereof. The preparation method comprises the following steps of using polysaccharide raw materials, powdery sodium hydroxide, halloysite clay, sodium phosphate, N-hydroxymethyl acrylamide, N,N-methylene bisacrylamide, persulfate and polysaccharide glue as raw materials, stirring, radiating by microwaves, curing by an ultraviolet lamp, heating, crushing, roasting, and cooling, so as to obtain the ceramic blank enhancer product; mixing 0.1 to 0.3 part of ceramic blank enhancer and 100 parts of ceramic blank raw material, so as to improve the anti-fracture strength of the ceramic blank by 20 to 200%. The ceramic blank enhancer has the advantages that the ceramic blank enhancer is applied to the fields of wet and dry-type ceramic preparation; by adopting the preparation method, the drainage of wastewater, waste slag and waste gas is avoided, and the danger to environment is very small, so that the market prospect is broad.

The invention belongs to the field of casting and particularly relates to high-fluidity phosphate inorganic binder sand and a preparation method thereof. The high-fluidity phosphate inorganic binder sand comprises, by mass, 2500 parts of burnt sand, 100 parts of a phosphate inorganic binder, 8 parts of a metallic oxide curing agent and 5 parts of an addition agent. The addition agent comprises a solution prepared by one or more nonionic surface active agents such as alkyl glycoside, 1-61, 1-62, S-80 and MOA-9P, and silicon dioxide with the granularity at 400-1200 meshes and mixed with the solution; and the weight ratio of the nonionic surface active agents to the silicon dioxide is 1:5-1:3. According to the high-fluidity phosphate inorganic binder sand and the preparation method thereof, while the inherent advantages of cleanliness and environment protection, good collapsibility, high strength and the like of the phosphate binder sand are maintained, the fluidity of the phosphate binder sand is greatly improved, and requirements for novel green casting materials and a casting method in modern casting production are met.

The invention discloses a metal powder material for 3D printing, a preparation method of the metal powder material and a 3D printing method. The preparation method of the metal powder material for 3D printing comprises the following steps that iron-base alloy powder with the grain sizes ranging from 20 micrometers to 60 micrometers is used as a base body, iron oxide powder and carbon powder with the grain sizes ranging from 50 nanometers to 2 micrometers are used as additives, the powder is evenly mixed, and the metal powder material is obtained; the mass ratio of the iron oxide powder and the carbon powder is within the range of 4.4:1-8.8:1, and the ratio of the sum of the mass of the iron oxide powder and the mass of the carbon powder to the mass of the iron-base alloy powder is within the range of 1:100-1:400. After the metal powder material is prepared, the metal powder material is printed to be a three-dimensional blank through a micro-jetting bonding 3D printing method; the three-dimensional blank is subjected to degreasing sintering, the sintering temperature is no lower than 900 DEG C, and a 3D printing product is obtained. The metal powder material is used in the 3D printing method, and therefore the obtained printing product is high in compactness.

The invention provides drinking yoghourt and a making method thereof. The drinking yoghourt comprises the following ingredients: 18.5-25% of total solid matter, 2.5-3.0% of milk fat and 2.3-2.7% of milk protein; the drinking yoghourt of the invention also comprises the ingredient of sweetening agent of which the sweetness is equal to that of 6-9% of cane sugar. The drinking yoghourt of the invention is made through the steps of mixing all ingredients, homogenizing, sterilizing, cooling, inoculating lactic acid bacteria fermentation agent and homogenizing fermented yoghourt material. In the invention, by reasonably selecting and proportioning the formula of the drinking yoghourt and controlling proper production process, the drinking yoghourt obtained by production has good flowability, and simultaneously has good flavor and mouth feel and good stability.

The invention relates to a device for the extrusion of web-shaped or belt-shaped preforms (1) made of thermoplastic plastic, having an extrusion head, the melt outlet of which is designed as a nozzleslit which can be adjusted perpendicular to the direction of extrusion and which extends straight. The device is characterized in that the nozzle slit (6) is bounded at least on one side directly by anumber of segments (9) which can be adjusted perpendicular to the direction of extrusion independently of each other, the segments enabling a level-wise or step-wise adjustment of the width of the nozzle slit (6).

The invention provides a preparation method of bainite steel which is high in purity, better in hardness, more excellent in wear resistance and corrosion resistance and excellent in low-temperature impact toughness by improving the components and controlling the smelting process, the refining process and the continuous casting process. The method specifically comprises the steps of KR method molten iron pretreatment, top-bottom combined blown converter smelting, LF furnace refining, VD treatment, square billet continuous casting, rolling and heat treatment.

The invention relates to the field of canal construction, and particularly discloses a one-time forming construction method for a cast-in-place canal by a rolling type forming machine, which comprises the following steps: step 1, surveying and setting out, and marking the excavation position of the canal; 2, digging a canal trench according to the marked position; step 3, preparing a concrete mixture; and 4, casting the concrete mixing material in place, curing and forming to obtain the water channel. Wherein the concrete mixture comprises the following components in parts by mass: 440-450 parts of cement; 140 to 150 parts of water; 100 to 150 parts of sand; 100 to 120 parts of slag; 120 to 150 parts of vesuvianite powder; 50 to 70 parts of nano silicon dioxide; 15 to 20 parts of konjaku flour; and 30-40 parts of water glass. The concrete mixture is used for casting the water channel in situ, so that the concrete mixture is convenient to cast and form, and the compressive strength of the water channel formed by casting the concrete mixture is guaranteed.

The invention discloses a method for preparing silicon carbide powder as an organic composite material reinforcement, which comprises the following steps: step 1, taking the raw material of silicon carbide powder, sending it into a ball mill for shaping treatment; step 2, taking the shaped silicon carbide powder The silicon carbide powder is purified by acid washing with sulfuric acid, then washed with ultrapure water, and dried to obtain purified silicon carbide; step 3, mix the purified silicon carbide with ultrapure water, and add NaOH solution to obtain alkaline Silicon carbide slurry; step 4, add hydrophobic agent to the alkaline silicon carbide slurry, stir, place in an oven to dry, pass through a mesh screen, and continuously add to the sieved silicon carbide powder during the sieving process The strengthening agent is sprayed and dried evenly to obtain the silicon carbide powder used for the reinforcement of the organic composite material. The invention can effectively improve the affinity between the silicon carbide powder and the organic composite material, improve the compatibility and dispersibility during filling, improve the comprehensive performance of the product, and has simple process and easy control.

The invention discloses an environment-friendly circulating oxygen supply device for wastewater degradation and an implementation method of the environment-friendly circulating oxygen supply device, and belongs to the field of circulating oxygen supply. According to the environment-friendly circulating oxygen supply device for wastewater degradation and the implementation method of the environment-friendly circulating oxygen supply device, through arrangement of an oxygen supply channel, the mixed sewage overflows from the inside outduring memory oxygen supply. Compared with the air introduction from the outside in in the prior art, the oxygen content in sewage is significantly improved. Meanwhile, under the action of a gas storage fluff bundle and a gas containing pile, a certain attachment point can be provided for the introduced mixed gas, so that the mixed gas is temporarily stored, the existence duration of the mixed gas in the sewage is effectively prolonged, the oxygen content in the sewage is further improvedcompared with the prior art, and the activity of the microorganisms is higher, so that the degradation efficiency of the microorganisms on organic matters in sewage is improved. In addition, under the action of an air shock swing ball, the outer wall of a sewage pool can be impacted under the action of rapidly circulating air, so that the temporarily stored mixed gas is accelerated to overflow into the sewage for oxygen supply.

The invention provides a lubricating oil filtering and collecting method, and relates to the technical field of lubricating oil filtering, the lubricating oil filtering and collecting method is completed by lubricating oil filtering and collecting equipment, and then filtering and collecting of lubricating oil are achieved. The lubricating oil filtering and collecting equipment comprises a filtering box and a filtering frame, wherein an oil inlet pipe opening A and an oil outlet pipe opening A are formed in the left end and the right end of the top of a settling tank respectively, the settling tank is of a hollow structure, and the settling sealing cover is buckled at the top of the settling tank; an oil inlet pipe opening B and an oil outlet pipe opening B are formed in the left end and the right end of the top of an adsorption box correspondingly, the adsorption box is of a hollow structure, and the adsorption sealing cover is buckled to the top of the adsorption box; the filtering box is of a hollow structure, the filtering sealing cover is buckled at the top of the filtering box, and an oil inlet pipe opening C is formed in the top of the filtering sealing cover; when lubricating oil flows through the interior of the adsorption box, metal scraps carried in the lubricating oil are adsorbed on the outer wall of the magnetic plate under the influence of magnetic force, the content of large metal scraps in the lubricating oil is reduced, and the oil quality of the lubricating oil is guaranteed.

The invention relates to a device for the extrusion of web-shaped or belt-shaped preforms (1) made of thermoplastic plastic, having an extrusion head, the melt outlet of which is designed as a nozzle slit which can be adjusted perpendicular to the direction of extrusion and which extends straight. The device is characterized in that the nozzle slit (6) is bounded at least on one side directly by a number of segments (9) which can be adjusted perpendicular to the direction of extrusion independently of each other, the segments enabling a level-wise or step-wise adjustment of the width of the nozzle slit (6).

The invention provides a plate heat exchanger. A plate sheet of the plate heat exchanger is provided with a main heat exchange area and a plurality of corrugated structures arranged at intervals; a plurality of corrugated structures form a plurality of wave crest parts and a plurality of wave trough parts; the wave crest parts and the wave trough parts are arranged alternately; every two adjacent wave trough parts have the same or different depths; the depths of the wave trough parts are calculated based on the wave crest parts; in the direction perpendicular to the arrangement direction of the corrugated structures, each corrugated structure comprises at least two straight parts and a bent part; each bent part is located between the two corresponding adjacent straight parts; every two adjacent straight parts and the bent part located between the two adjacent straight parts form a herringbone corrugated pattern; the bent parts form corners of the herringbone corrugated patterns; at least one bent part is provided with a communicating part; at least part of each communicating part penetrates the corresponding bent part in the arrangement direction of the corrugated structures; every two adjacent wave trough parts communicate through the corresponding communicating part; and the plate sheet forms a flow channel through the communicating parts, and fluid can pass through the wave crest parts through the flow channel. The heat exchange performance of the plate heat exchanger can be improved.

The present application relates to the field of building materials, and specifically discloses a lightweight aggregate concrete and a preparation method thereof. A lightweight aggregate concrete, prepared from raw materials including the following parts by weight: cement, admixture, machine-made sand, stone powder, surface-modified ceramsite, fine stone, polytetrafluoroethylene fiber, water, water-reducing agent; surface The modified ceramsite is obtained by surface modification of ceramsite with fireproof resin and potassium perfluorobutanesulfonate; the preparation method is as follows: mixing and stirring cement, admixture, machine-made sand, stone powder and fine stone to obtain a solid mixture; The remaining raw materials other than the surface-modified ceramsite and the polytetrafluoroethylene fibers are added to the solid mixture, and the concrete slurry is obtained by stirring; the surface-modified ceramsite and the polytetrafluoroethylene fibers are added to the concrete slurry, and the concrete is obtained after stirring. The lightweight aggregate concrete of the present application improves the high temperature resistance of the concrete; the preparation method of the present application reduces the possibility of abrasion of the organic film on the surface of the surface-modified ceramsite.

The invention discloses a nucleating agent for thin-wall ferritic nodular cast iron. The nucleating agent comprises the following chemical components of, by mass, 60%-65% of Si, 1%-2.5% of Ba, 9%-12% of Cr, 0.1%-0.5% of Al, 0.5%-0.8% of Bi, 1%-1.2% of Ca, 0.3%-0.5% of Sr and the balance of Fe. The invention further provides a preparation method of the nucleating agent for the thin-wall ferritic nodular cast iron. The preparation method comprises the following steps of S1 proportioning; S2 mixing of materials; S3 smelting; S4 cooling; and S5 crushing. According to the nucleating agent and the preparation method, metal aluminum, metal chromium, metal strontium, metal bismuth, metal barium and 75B silicon iron are added into cast iron, phosphorus eutectic is reduced and decomposed through the bismuth element so as to inhibit the anti-chilling effect of the casting, and the section sensitivity of the casting is reduced; and meanwhile, the material source is optimized, and the content of aluminum and calcium is controlled in the proportion, so that the adverse effect on the liquidity of the cast iron liquid is effectively avoided, and the finished product quality of castings is improved to a certain extent.

An apparatus used for measuring a filling slurry pipeline resistance loss parameter and a method thereof are disclosed. The apparatus comprises an L-shaped pipe, a stirring device, a speed regulation pressure pump, an electromagnetic flowmeter, a moving support seat and a conveying flexible pipe. The stirring device and the speed regulation pressure pump are installed on and fixed to the moving support seat. The stirring device is arranged below a tail end of a horizontal segment of the L-shaped pipe. The horizontal segment of the L-shaped pipe is formed by several short circuits. Internal diameters of each part of the L-shaped pipe are the same. A top end of a vertical segment of the L-shaped pipe is provided with a feed hopper. The feed hopper is provided with a limiting line. One end of the speed regulation pressure pump is connected to the stirring device and the other end is connected to the feed hopper through the conveying flexible pipe. The electromagnetic flowmeter is installed on the conveying flexible pipe. The invention also comprises a method of measuring the filling slurry pipeline resistance loss parameter. By using the apparatus and the method of the invention, measurement accuracy is high; calculating is simple; a land occupation area is small; a test period is short; test cost is low and material adoption is less.

The invention relates to a preparation method for a high-solid-content low-viscosity polyacrylamide emulsion. According to the preparation method provided by the invention, a 30%-50% monomer aqueous solution is added into an oil phase system composed of an emulsifier, solvent oil and an azo initiator, a polymerization reaction is performed, the adding amount of a monomer is controlled to account for 20-30% of the total weight of the emulsion, the polymerization heat released in the preparation process is reduced, and the safety hazards are eliminated; and vacuum distillation is performed on the emulsion after polymerization is completed, the water content in the product is reduced, and the solid content of the product is improved. The polyacrylamide emulsion prepared by the preparation method reduces the viscosity and coagulation point of a high-solid-content emulsion product, solves the problems that the high-solid-content emulsion product has residues and accumulation in a medicine adding pump and a pipeline during field use, and finally the blocking is caused, and ensures that the field production is successively performed. The high-solid-content low-viscosity polyacrylamide emulsion product prepared by the method can be widely applied in various fields such as water treatment, papermaking and oil field mining.

The invention relates to the technical field of concrete detection, and particularly discloses a sealant for concrete anti-permeability performance detection, a preparation method thereof and a concrete anti-permeability performance detection method. The sealant for concrete anti-permeability performance detection is prepared from the following raw materials: butter, a powder admixture, inorganic hydrated salt and a thickening agent. The preparation method comprises the following steps: mixing the butter, the admixture, the inorganic hydrated salt and the thickening agent, and performing stirring for 3-5 minutes to obtain the sealant. The concrete anti-permeability performance detection method comprises the following steps: (1) uniformly smearing the sealant on the side surface of a test piece, and uniformly smearing an astringency increasing agent on the inner wall of a test mold to prepare a test piece to be tested; and (2) vertically pressing the test piece to be tested into the test mold, and then measuring the penetration height of the test piece to be tested. The sealant disclosed by the invention has a good sealing effect on the concrete test piece under the condition of relatively large temperature difference in winter and summer, so that the sealant has relatively good temperature applicability.

The invention discloses a heat-conductive silicone grease composition being high in heat conductivity and low in viscosity and freeness degree, and a preparation method of the silicone grease composition. The heat-conductive silicone grease composition includes organo-polysiloxane, heat conductive filler and other additives. By selecting the heat conductive fillers in multiple dimensions (one-dimension, two-dimension and three-dimension) and multiple scales (micron, submicron and nanometer) and in special ranges, synergistic effect among the multi-dimension and multi-scale fillers is achieved,thus achieving compact stack of the fillers in a local network structure. The heat-conductive silicone grease not only is improved in heat-conductivity but also has good flowability, low viscosity and low freeness degree.