50results about How to "Solve the problem of uneven mixing" patented technology

A double helical ribbon stirrer with multiple layers of blade scrapers comprises a stirring shaft (5), helical ribbons (2), support blades (1), separate blades (4) and a soft scraper (3). The support blades (1) and the separate blades (4) are layered and arranged on the stirring shaft (5), and the support blade and the separate blade of each layer are arranged on the stirring shaft (5) symmetrically, and the support blade (1) and the separate blade (4) keep a dip beta of 10 degrees to 45 degrees with the radical level section, and smaller dip can reduce the loss of useful work effectively. The helical ribbons (2) are connected with the stirring shaft (5) through the support blades (1) which have the functions of connecting ribs and strengthening ribs, thus causing reasonable structure design of the whole stirrer. The soft scraper (3) is divided into two sections which are fixed on the top of the helical ribbons (2) symmetrically, and an angle alpha between the soft scraper (3) and a still wall is 20 degrees to 60 degrees. The soft scraper (3) can scrape sticky material on the stirring still wall in time, thus solving the problem of incomplete mixing on the surface of the still wall and avoiding the damage to the still wall. The stirrer of the invention provides a material system that can adapt to different viscosities, in particular to the material system which has large viscosity variation range in a short time.

The invention discloses a synthetic method of 2,6 dihydroxy naphthalene, which comprises the following steps: placing 2,6 dihydroxy naphthalene in an alkali fusion pan, then a mixture of solid sodium hydroxide and nitrate is placed, Slowly heating to 150-170 DEG C, stirring, continuously heating to 320 DEG C, insulating for fusing alkali for 2.5-3.5 hours at 310-330 DEG C, then cooling to 200 DEG C, slowly dropping 450g of water for diluting, using a tri(octyl-decyl)amine solution for extracting 2,6-dihydroxy naphthalene, then acidifying the extracted 2, 6-dihydroxy naphthalene by sulfuric acid, and filtering and refining filter cake by an ethanol water mixed solvent to obtain 2,6-dihydroxy naphthalene. According to the synthetic method of 2,6-dihydroxy naphthalene, the used inorganic solvent is a mixture of potassium nitrate, sodium nitrite and sodium nitrate. According to the invention, viscosity of an alkali fusion material is low, fluidity is good, material can be uniformly mixed, and alkali fusion effect is good. In addition, under high temperature condition for alkali fusion, no decomposition problem of oxidation organic matter is generated, and no difficult separating problem is generated for the mixture.

The invention discloses a high strength sprayed concrete for high ground temperature tunnels and a preparation method thereof. The concrete comprises following raw materials: cement, fly ash, slag powder, sand, coarse aggregate, glass beads, PVA fibers, steel fibers, modified rubber, a water reducer, a setting accelerator, and water. Low melting point water-soluble PVA fibers are adopted, after concrete reaches the melting point of the PVA fibers, fibers are melted, tunnels are formed, thus water steam in the concrete can be conveniently dissipated through the tunnels, the steam pressure in the concrete is reduced, the risk of bursting is reduced, at the same time, the melted water-soluble PVA fibers can largely enhance the inner cohesive force of concrete, and the cracking of a cement face is avoided. Through the cooperation of all raw materials, the prepared concrete has the characteristics of low heat conductivity coefficient, good anti-permeability, high interfacial bond strength,and little long-term strength loss. The long-term strength of concrete after spraying is largely improved. The cracking of high ground temperature concrete is avoided.

The invention discloses a non-metallic mineral long-acting nitrogenous fertilizer nitrification inhibitor and a preparation method thereof. The preparation method is characterized by comprising the following steps: introducing 1-50 parts of the nitrification inhibitor into 100 parts of 25-100 DEG C water so as to make a solution; adding 25-75 parts of nitrification inhibitor solution into every 100 parts of non-metallic mineral powder; and sufficiently stirring and drying so as to obtain the nitrification inhibitor; or a binder accounting for 1-5% of the total weight of the non-metallic mineral and the nitrification inhibitor solution is added, sufficiently stirred, palletized and dried; or a mixture of the non-metallic mineral and the nitrification inhibitor solution or a screened powder product covers the outer surface of the fertilizer. The product is prepared by utilizing the excellent abruption property of the non-metallic mineral, the process is simple, the cost is low, the slow-release effect is better, and the inhibition effect on the activity of soil enzyme is longer; and meanwhile the non-metallic mineral can further provide various beneficial elements to the soil, so that the physicochemical properties of the soil are improved.

The invention relates to an active core silver solder for soldering ceramics and a preparation method thereof, and the active core silver solder comprises two parts, namely a core part and an outer layer, wherein the core part is composed of an active alloy containing active elements and the outer layer is composed of a silver alloy. The active core silver solder comprises the following main components by weight percent: 2-6% of the active alloy comprising three elements, namely Ti, Zr and Hf, wherein the active alloy contains 0.1-5wt% of the Zr, 0-3wt% of the Hr and the balance of the Ti; and 94-98% of the silver alloy comprising the elements of Ag, Cu and Ge, wherein the silver alloy contains 66-72wt% of the Ag, 26-27.9wt% of the Cu and 0.1-8wt% of the Ge. The threadlike active core silver solder can be directly obtained by adopting a method of wrapping an active core at the interior by extrusion through semi-molten metal. Compared with the characteristic of low melting point of thesolder of domestic like products, the preparation process is high in production efficiency and a new way is opened for manufacturing the solder which is difficult to machine and form due to brittle intermetallic compounding.

The invention discloses citrus steamed fish sauce and a preparation method thereof, and belongs to the technical field of food fermentation engineering. According to the citrus steamed fish sauce disclosed by the invention, the technology that soybeans, flour, bran, citrus peels and purple perilla are used as starter propagation raw materials and aspergillus oryzae 3.042 and aspergillus niger 3.350 cooperate for starter propagation is adopted, at the middle stage of fermenting soy sauce mash, saccharomyces rouxii is added, and at the later stage, torulopsis bombicola is added. The aspergillus niger has higher cellulose activity, lipase activity and pectinase activity, and can achieve the enzyme system complementary effect with the aspergillus oryzae 3.042. The activity of the cellulase, the activity of the lipase and the activity of the pectinase obtained at the stage of starter propagation are higher, the cellulase, the lipase and the pectinase are used for decomposing the citrus peels and the purple perilla and promoting the release of various active substances in the citrus skins and the purple perilla. The addition of the two kinds of salt resistant fragrance-producing yeasts at the middle stage and the later stage of fermentation can promote the formation of flavor substances of the steamed fish sauce, improve the flavor of the steamed fish sauce and increase the kinds of the flavor substances.

The invention relates to the technical field of concrete stirring devices and discloses an efficient concrete stirring device which comprises a stirring tank; a power tank is fixedly connected to thetop of the stirring tank; a fixed frame is fixedly connected to the top wall of an inner cavity of the power tank; a first motor fixedly sleeves the bottom of the fixed frame in a sleeving manner; a driving gear fixedly sleeves the first motor through a rotary shaft at one end of the first motor; and a bearing is inlaid between a bottom plate of the power tank and a top plate of the stirring tank.For the efficient concrete stirring device provided by the invention, the problem that concrete is not very uniformly stirred is solved; and by arranging a baffle plate, connection rods, first chuteplates, a first sliding plate, an upper buffer tank, a lower buffer tank, second chute plates, a second sliding plate, supporting rods, reset springs, a supporting seat, a second motor and a cam, concrete on the top of the baffle plate is continuously turned over, so that the contact opportunity of the concrete and stirring blades is increased, and stirring of the concrete is more uniform.

The invention relates to a metal powder mixing device and method and a high-throughput metal alloy preparing system. The metal powder mixing device comprises a cylinder and a metal powder carrier gaspipeline. A metal powder carrier gas inlet is further formed in the side wall of the upper end of the cylinder. The metal carrier gas pipeline is parallel to the tangential direction of the side wallof the cylinder. Metal powder and carrier gas can form carrier gas carrying metal powder after passing through the metal powder carrier gas pipeline, the formed carrier gas enters the cylinder from the metal powder carrier gas inlet at a constant speed, and annular turbulent flow is formed in the cylinder to be mixed and scattered. In the metal powder mixing method, the carrier gas carrying metalpowder enters the cylinder and forms the annular turbulent flow, and therefore the probability of metal powder colliding is improved, and the metal powder mixing efficiency is further improved. By means of the high-throughput metal alloy preparing system, metal powder mixed evenly through the metal powder mixing device can be machined, and a needed metal alloy can be more accurately obtained.

The invention discloses a low-density oil well cement reinforcing material, and relates to the technical field of oil well cement. The low-density oil well cement reinforcing material consists of, byweight: 20-60% of a reinforced inorganic material, 5-30% of a coagulation-promoting early-strength material, 5-30% of micro-silica powder and 10-30% of granular cement, specifically, the reinforced inorganic material is one of superfine gelling material or superfine latent gelling material, and the particle size of the reinforced inorganic material is 1250 meshes to 8000 meshes; and the coagulation-promoting early-strength material comprises, by weight: 50% of organic acid salt cement early-strength agent and the mixture of 50% of organic cement early-strength agent and inorganic cement early-strength agent. The invention also discloses a preparation method and use method of the low-density oil well cement reinforcing material. The low-density oil well cement reinforcing material is capable of obviously increasing the compressive strength of low-density oil well cement when being added into a cement slurry system, wide in material source and low in cost.

The invention discloses a preparation method of a graphene/lithium iron phosphate composite material. The method comprises the following steps: adding a graphene oxide suspension liquid to a lithium iron phosphate precursor or a pre-sintered material or a sintered body; adding a little of solvent for wet ball-milling; and carrying out dry grinding treatment after ball-milling, and sintering the product in a reducing atmosphere to prepare the graphene/lithium iron phosphate composite material. The adopted graphite oxide contains a lot of oxygen-containing hydrophilic groups and is easily dispersed into the solvents of water, ethyl alcohol and the like under ultrasonic action, so that the problems of floatation, agglomeration and uneven mixing due to direct addition of graphene in a traditional lithium iron phosphate preparation method are solved; and the graphene prepared by the method is evenly dispersed among lithium iron phosphate particles, is free of accumulation and agglomeration and can form a good conductive network. The method is simple to operate; and large-scale industrial production is easy to implement.

The invention provides a device and a method for transporting materials quantitatively and mixing and packaging integrated equipment and relates to the field of food and drug processing equipment. Thedevice comprises a feeding barrel, an unloading channel and a quantitative transportation pipeline. The unloading channel communicates to the feeding barrel, and the quantitative transportation pipeline is mounted in the unloading channel and can move in the unloading channel to feed or discharge the materials; a striker plate is arranged in the quantitative transportation pipeline, the bottom ofthe quantitative transportation pipeline is sealed, a feed inlet is formed above the upper side of the side wall of the quantitative transportation pipeline, and a discharge opening is formed below the side wall of the quantitative transportation pipeline. The device can achieve quantitative transportation by adjusting the size of the quantitative transportation pipeline randomly, and materials with different characteristics are mixed and then poured into corresponding feeding barrels, so that the problem that the materials are not mixed uniformly due to characteristic difference is solved. The content difference among the products is reduced, and the accuracy of adding mixtures is ensured. In addition, the mixing and packaging integrated equipment can process the materials quickly, so that the mixing and packaging accuracy of the materials is guaranteed, and the device is more efficient.

The invention relates to high-performance concrete suitable for a high-temperature area. The high-performance concrete comprises the following components in parts by mass: 100-280 parts of cement; 150 to 230 parts of modified metakaolin; 150 to 260 parts of clay clinker; 80-190 parts of coal ash powder; 100 to 150 parts of sand; 50 to 100 parts of water glass; 15 to 50 parts of sodium silicate; 30 to 80 parts of asphalt; 15 to 25 parts of a functional additive; 200 to 400 parts of water; according to the invention, various mechanical properties and high temperature resistance of the concrete are improved, and the freeze-thaw resistance of the concrete is effectively improved.

The invention discloses a high-load low-resistance melt-blown material production device and method. The high-load low-resistance melt-blown material production device comprises a hopper, and a feeding device is movably arranged at the side end of the hopper; a mixing partition plate is arranged in a mixing machine to divide the mixing machine into a front space and a rear space, a double-layer stirring device is arranged in the front space of the mixing machine, and stirred and mixed materials enter the rear space of the mixing machine through a first discharging hole below the mixing partition plate for temporary storage. A double-screw extruder, a cooling device and a cooling device are arranged at the tail end of the mixing machine; the materials cooled by the cooling device are conveyed to a granulator through a conveying belt for granulation and screening, the materials are dried by a fan and then fed into a homogenizing and mixing tank through a rotary feeder for homogenizing processing, and finally a finished product is prepared. The process steps are optimized, integrated and intensive design and arrangement are carried out, the production formula is unique, the productionresistance is reduced, discharging is smooth, the product quality is kept excellent, and high-load low-resistance melt-blown materials can be efficiently produced with high quality.

The invention discloses a quantitative microbial feed fermentation device. The quantitative microbial feed fermentation device comprises a device body and a fermentation tank, a feeding inlet runs through the top of the device body, a top cover is connected to one side of the top of the feeding inlet through a movable shaft, and the top of the top cover is fixedly provided with a handle. A ventilation pipe penetrates through the upper portion of one side of the device body, a quantifying tank penetrates through the other side of the device body, a quantifying device is arranged on one side ofthe quantifying groove, an operation table is arranged below the outer surface of the device body, the cross section area of a stirring rod is equal to that of the lower portion in a mixing chamber, and a plurality of bosses are fixed to the outer surface of the stirring rod. During work, a motor drives the stirring rod to rotate, materials, which sink to the bottom, on the lower portion in the mixing chamber can be stirred, and the materials are prevented from sinking to the bottom.

The invention discloses a bypass air release quench chamber device. The bypass air release quench chamber device is characterized by comprising a hot air settling chamber and a quench chamber connected with the hot air settling chamber; the hot air settling chamber is provided with a settling channel penetrating through the two ends; and the quench chamber comprises an outer cylinder, an inner cylinder and a volute, the inner cylinder is arranged on the inner side of the outer cylinder, an annular duct is formed between the inner cylinder and the outer cylinder, one end of the outer cylinder is a hot air inlet communicated with an outlet of the settling channel of the hot air settling chamber, the other end of the outer cylinder is connected with the outer wall of the inner cylinder, the end, away from the hot air inlet, of the inner cylinder is a quench chamber outlet, a cold air inlet capable of guiding air into the inner side of the outer cylinder in the tangential direction of theinner wall of the outer cylinder is formed in the outer side of the end, close to the quench chamber outlet, of the outer cylinder, and the volute is communicated with the cold air inlet. The quench chamber device is high in hot flue gas cooling speed, high in cold and hot air mixing efficiency, small in overall structure, convenient to arrange and easy to operate and maintain, coarse sedimentation discharge is reduced, and rapid enrichment of harmful ingredients is facilitated.

The invention provides multifunctional double-order melting method efficient production equipment and process, the equipment comprises a rack, a material storage device, a weighing device, a material collecting device, a mixing mechanism, a banburying mechanism, an extruding mechanism and a follow-up mechanism, and the process comprises the steps that materials are put into the material storage device, and after being metered by the weighing device, the materials are fed into the extruding mechanism; materials are fed into the mixing mechanism through the material collecting device to be primarily stirred and mixed, the evenly-mixed mixture is internally mixed and plasticized, then enters the extrusion mechanism in a semi-molten state, is heated and stirred in the extrusion mechanism and then is extruded in a molten state to be subjected to follow-up requirements such as tape casting or granulation, and the materials are formed through one-time machining. And compared with traditional equipment, material molecular structure changes caused by secondary or multiple heating plasticization of the material are reduced, and secondary pollution of the material is more effectively avoided.

The invention relates to a metering, stirring and mixing device for industrial powder and granules which solves the problems that the structure is complex, the volume is huge, the power is easily accumulated and cannot be uniformly mixed, and the like in the prior art. The device is characterized by comprising a stander, a powder blanking device, a stirring mixer and a stirring power machine, wherein the powder blanking device comprises a storage container, a discharging device, a first vertical conveying pipe, a horizontal conveying pipe, a second vertical conveying pipe, a vibrator and a blanking controller, the storage container, the first vertical conveying pipe, the horizontal conveying pipe, the second vertical conveying pipe, a vibrator and the stirring mixer are sequentially connected; the discharging device comprises a stirring driver and stirring impellers; the vibrator is connected with the horizontal conveying pipe; the blanking controller comprises a blanking door, a blanking driver and a weight sensor, the blanking door is matched to s blanking hole of the second vertical conveying pipe, and the weight sensor is mounted on the blanking door; and the stirring mixer comprises a horizontal cylinder container and stirring impellers and is further provided with a liquid adder.