1794results about How to "Shorten mixing time" patented technology

The invention provides a blending system of a fracturing fluid. The blending system comprises a suction pump, a mixer, a mixing tank, a secondary mixer which is arranged between the mixer and the nixing tank and is used for mixing the fracturing fluid again, and a parallel-connection water channel, wherein one end of the parallel-connection water channel is communicated with the suction pump, the parallel-connection water channel and a mixing water channel of the mixer are connected in parallel, and the other end of the parallel-connection water channel is communicated with the secondary mixer. The blending system provided by the invention has the advantages that the parallel water channel is additionally arranged and is connected with the mixing water channel in parallel, a base solution is capable of simultaneously entering two routes, namely the mixing water channel and the parallel-connection water channel, not all of the base solution enters the mixing water channel, a condition that the limitation on blending efficiency is caused by the relatively small flow of the mixing water channel is avoided, the blending time is shortened, the blending energy consumption is reduced, the fracturing fluid is formed through multi-time blending in a double-route manner, the mixing uniformity is improved, and the quality of the fracturing fluid is further optimized. The invention also provides a fracturing fluid blending technology suitable for the blending system of the fracturing fluid.

The invention relates to a nickel cobalt manganese lithium oxide material used for an anode of a li-ion battery and a preparation method. The invention belongs to the li-ion battery technical field. The nickel cobalt manganese lithium oxide material used for the anode of the li-ion battery is a li-rich laminated structure with the chemical component of Li1+zM1-x-yNixCoyO2; wherein, z is less than or equal to 0.2 and more than or equal to 0.05, x is less than or equal to 0.8 and more than 0.1, and y is less than or equal to 0.5 and more than 0.1. The preparation method of the invention is that dissoluble salt of the nickel, cobalt and manganese is taken as the raw material; ammonia or ammonium salt is taken as complexing agent; sodium hydroxide is taken as precipitator; water-dissoluble dispersant and water-dissoluble antioxidant or inert gas are added for control and protection; in a cocurrent flow type the solution is added to a reaction vessel for reaction; after alkalescence disposal, aging procedure, solid-liquid separation and washing and drying, the nickel cobalt manganese oxide is uniformly mixed with the lithium raw material; the nickel cobalt manganese lithium oxide powder is obtained by sintering the mixed powder which is divided into three temperature areas. The invention has the advantages of high specific capacity, good circulation performance, ideal crystal texture, short production period, low power loss, and being suitable for industrial production, etc.

Magnetic stirring devices, such as magnetic stirring elements and magnetic stirring systems, and stirring methods where enhanced stability and mixing efficiency is made possible by using magnets that are magnetized through thickness in relation to the rotation axis so as to improve torque and magnetic field coverage. In addition, stirring elements having protruding structures such as blades and support legs are used to improve stirring efficiency.

The invention belongs to the technical field of micro fluid control, particularly disclosing a micro fluid control chip and a preparation method and application thereof. One side of the chip is provided with a plurality of sample introduction holes, each sample introduction hole is communicated with a sample introduction runner; after meeting, each sample introduction runner is communicated with a main runner; the main runner is provided with a narrow runner; a micro-sphere of which the size is 0.5-1.5 mm is filled in front of the inlet of the narrow runner; the outlet of the main runner is communicated to a waste liquid tank arranged at the other side of the chip. The preparation method mainly comprises: firstly preparing a PDMS substrate; then, preparing a PDMS cover plate with an upper groove; sticking the substrate onto the cover plate to obtain a semi-finished product of the chip; carrying out modified treatment on each runner in the semi-finished product of the chip; finally, putting the micro-sphere in, controlling the charge quantity, and finishing production. The micro fluid control chip of the invention has high solution mixing efficiency, stable solution flow rate, small volume, convenient carrying and relatively simple manufacturing; when being used for detecting the density of triphosadenine, the micro fluid control chip has the advantages of high sensitivity, favourable detection effect and the like and can not be affected by environment humidity.

The invention provides a method for continuously producing particle reinforced metal matrix composites in an industrial scale, which adopts the synthesis of metal matrix composites in a combination magnetic field. The method is characterized in that: the combination of a rotating magnetic field and a travelling wave magnetic field is adopted to synthesize a preparation particle reinforced metal matrix composite fused mass in the in-situ synthesis process of composites. The low frequency rotating magnetic field is placed at the outer side of a composite material molten pool, and the center of a coil of the magnetic field and the center of the fused mass are at the same height; and the travelling wave magnetic field is exerted at the bottom part of the composite material molten pool, and the coil center of the travelling wave magnetic field and the center of the composite material molten pool are at the same position. The composite material particle reinforced phases prepared by the method are distributed evenly and thinned, interior tissues are compact and have no structural defects such as loosening and hole shrinkage, the degree of finish of external surfaces of casting blanks is high, defects are eliminated, and the friction resistance and the abrasion resistance of the composites are obviously improved.

The invention discloses a formula of a ceramic aggregate aerated concrete brick and a method for making the concrete brick. The compositions in portion by weight of the concrete brick are: 12 to 26 portions of cement, 26 to 46 portions of fly ash, 16 to 28 portions of ceramic aggregate, 2 to 6 portions of slag, 2 to 6 portions of cinder, 16 to 26 portions of water and 2 portions of addition agent, wherein the concrete matters in percentage by weight of the addition agent are: 10 to 18 percent of aluminum powder (a foaming agent), 20 to 45 percent of polycarboxylate (a water reducing agent), 15 to 35 percent of 1122 fly ash excitant and 20 to 50 percent of coagulant hardening accelerator in which calcium chloride and sodium sulfate compounds respectively occupies 50 percent. The concrete steps for making the ceramic aggregate aerated concrete brick are as follows: raw materials are weighed; the weighed raw materials are placed in a stirring machine to carry out stirring and mixing in advance; an addition agent is added in the stirring machine to carry out full stirring; a brick die is prepared, and stirred raw materials are cast in the brick die; initial set and forming are carried out; stripping is carried out; a water-proofing agent is sprinkled on a stripped brick; and natural curing is carried out. Moreover, the obtained brick has light dead weight, low density, high strength, low water absorption rate and excellent sound insulation performance and heat-shielding performance.

Apparatus and methods produce substantially continuous batches of high-strength concrete. Portland cement, flyash, sand, water, and concrete chemical additives are premixed in a multi-stage process, prior to final mixing with the coarse aggregates. In sequence, the complete mixing process includes: 1) a twin-shaft compulsory mixer to blend the materials, then disposing the mixture into; 2) a horizontal screw conveyor, continuously mixing as the mixture passes through the housing, thereby disposed simultaneously with the coarse aggregates into; and 3) the mixer concrete delivery truck, wherein the concrete is mixed further.

This invention relates to the preparation of a silica reinforced elastomer via preparation of a silica-elastomer masterbatch as a composite of synthetic silica and an emulsion polymerization prepared synthetic elastomer. Such masterbatch is prepared by introducing such silica and a silane into a latex of the synthetic elastomer and recovering the composite thereof The invention further includes a rubber composition of at least two elastomers wherein at least one of said elastomers is such masterbatched composite. A tire having a component of such rubber composition, particularly a tire tread, is specifically contemplated.

This invention relates to the preparation of a silica reinforced elastomer via preparation of a silica-elastomer masterbatch as a composite of synthetic silica and an emulsion polymerization prepared synthetic elastomer. Such masterbatch is prepared by introducing such silica and a silane into a latex of the synthetic elastomer and recovering the composite thereof The invention further includes a rubber composition of at least two elastomers wherein at least one of said elastomers is such masterbatched composite. A tire having a component of such rubber composition, particularly a tire tread, is specifically contemplated.

The invention discloses negative pole slurry of a lithium ion battery, a rapid preparation method thereof and a negative pole piece of the lithium ion battery. The preparation method comprises the following steps: stirring an active substance, a conducting agent and a thickening agent in a stirring machine at a low speed to form mixed powder, then in the state that low-speed stirring of the mixed powder is maintained, adopting a spraying manner to add a first solvent, carrying out high-speed stirring to form spherical particles, then adopting the spraying manner again to inject a second solvent into the spherical particles, carrying out high-speed stirring and low-speed dispersion to prepare slurry, then directly adding remaining solvent, carrying out low-speed stirring and high-speed dispersion to prepare a mixed solution, finally adding an adhesive, and carrying out low-speed stirring and low-speed dispersion to prepare the negative slurry of the lithium ion battery. The addition of the solvents adopts stirring and spraying manners, and the power is rapidly moistened to form the uniform spherical particles, so that the total mixing time is reduced, the production efficiency is improved, and the equipment energy consumption is reduced. The negative pole slurry of the lithium ion battery prepared by the method has high stability, and the negative pole piece dried and prepared by the negative pole slurry coated on a current collector is relatively attractive in appearance.

Quick mixture device for chemical fuse-elements and solid power comprises mixture slot composed with fixed truncated cone upper mixed cone table laid narrow-end-up and lower mixed cone table laid narrow-end-down, and mixture impeller expended into and connected with the mixture table; discharge port; shaft extended into slot and drove by motor and gear mechanism; and inlet pipes for liquid and power expended and feed raw material into mixture impeller to make it rotate and finish the forced mixture depended on centrifuging motion. This invention can mix the raw material quickly and fully, and avoid the generation of new solid suspended matter.

This invention discloses a process for making nanopanticles of amphiphilic copolymers by flash precipitation. Nanoparticles may be of amphiphilic copolymer alone or may contain an additive target molecule, preferably an organic active. The inclusion of additive target molecules in amphiphilic copolymer nanoparticles can alter their water solubility characteristics, fluid dynamics, and / or stability. Changing an additive target molecule's solubility and stability in an nanoparticle can make a water insoluble compound suitable for pharmaceutical administration as well as specifically target the molecule to a specific area of a patient's body. The process affords the production of nanoparticles at high absolute active content, at high yield, high productivity, and high processing rates while using unusually low amounts of amphiphilic copolymers. Furthermore, the resulting particles exhibit sufficient stability for post processing as desired. The invention also discloses two apparatuses for the production of nanoparticles of amphiphilic copolymers by flash precipitation.

The invention discloses a slurry-homogenizing process for positive electrode slurry of a lithium ion battery, a positive electrode plate and the lithium ion battery, and belongs to the technical field of manufacturing of the lithium ion battery. The slurry-homogenizing process for the positive electrode slurry of the lithium ion battery comprises the steps of preparing an adhesive solution, stirring by a V-shaped stirrer, performing pre-mixing and stirring, performing high-speed stirring, performing viscosity adjustment, performing vacuum defoaming and the like; the positive electrode plate of the lithium ion battery comprises a positive electrode current collector and the positive electrode slurry for coating the positive electrode current collector; the positive electrode current collector adopts an aluminum foil; the positive electrode slurry is prepared by the slurry-homogenizing process for the positive electrode slurry of the lithium ion battery; and the lithium ion battery adopts the positive electrode plate of the lithium ion battery prepared by the method. By adoption of the slurry-homogenizing process, the solid content of the slurry is increased, so that solid granule friction in stirring can be improved, and the uniformity and the stability of the slurry can be improved; and by lowering a baking temperature in a drying oven in coating and drying, gaps formed between active material granules, conducive carbon granules and a binder can be reduced, thereby enhancing an adhesive effect and improving the performance of the lithium ion battery.

The embodiment of the invention discloses a washing method of cooking equipment. The cooking equipment comprises a smashing cavity, a water tank, a water pump, a water outlet pipe connected with the water tank and the water pump and a water delivery pipe connected with the smashing cavity and the water pump, the water pump pumps water in the water tank through the water outlet pipe, and the pumped water is delivered into the smashing cavity through the water delivery pipe to wash the smashing cavity. The method comprises the step of conducting washing many times with the preset water capacity and washing efficiency, wherein the water capacity and the washing power adopted in each time of washing are both different, and the water capacity and the washing power are adjusted according to the volume of the smashing cavity. According to the washing method of the cooking equipment, an ideal washing effect can be achieved by using a small amount of water.

The invention discloses a blending device of a blood cell analyzer, mainly comprises a blending mechanism and a lifting mechanism, wherein the blending mechanism comprises a vertical blending mechanism, the vertical blending mechanism comprises a vertical blending motor, a linear guide rail and a slide block which are arranged on a blending motor support, and a blending mandril is fixedly arranged at the top of the slide block; the output shaft of the vertical blending motor is coaxially fixedly connected with an eccentric wheel, and the eccentric wheel is connected with the guide rail and the slide block by virtue of a connecting rod; the lifting mechanism comprises a lifting base plate provided with a lifting motor and guide rods, and the top of each guide rod is connected with a lifting plate; the output shaft of the lifting motor is coaxially fixedly connected with a lifting screw rod, and the other end of the lifting screw rod and a lifting screw rod nut fixed on the lifting plate are in screw thread fit; and the blending motor support is fixed on the lifting plate. By applying the device provided by the invention, a test tube can realize variable speed reciprocating motion in the vertical direction, thus blood samples in the test tube can be blended more conveniently; and the location of the blending mandril in the vertical direction can be controlled, and the degree of automation is higher.

The invention provides a nontoxic, anti-heat shrinkable polyvinyl chloride material, comprising the following components in parts by weight: 100 parts of polyvinyl chloride resin, 20-30 parts of filling, 10-60 parts of plasticizer, 1-2 parts of lubricating agent, 2-12 parts of compound stabilizer, 3-10 parts of fire retardant and 10-15 parts of anti-heat shrinkable agent. The invention also provides a manufacturing technology of the nontoxic, anti-heat shrinkable polyvinyl chloride material. The nontoxic compound stabilizer and the anti-heat shrinkable agent are added to the nontoxic, anti-heat shrinkable polyvinyl chloride material, which dramatically improves various thermostabilization performances of the polyvinylchloride material, especially the anti-heat shrinkable performances. The raw material of the invention has low cost and is environment friendly, thus having wide application prospect.

A fuel injection method in an internal combustion engine and an internal combustion engine for performing the fuel injection method. The method includes heating fuel to a temperature between 300° F. and 840° F. (150 and 450° C.); pressurizing the fuel to a pressure exceeding 40 bar; pre-injecting at least 10% of the fuel charge as a pre-injected fuel during the intake stroke; injecting a fuel charge over at least part of the compression stroke into the cylinder; and injecting an ignition-injection of at least 10% of the fuel in a supercritical condition during the compression stroke at a rotational angle between 90° BTDCF and TDCF into the cylinder. The method and related combustion engine create a good mix of premix combustion and diffusion combustion increasing efficiency and consequently reducing emissions to the environment while also keeping noise and vibrations low.

The invention discloses a high specific energy lithium-ion power battery and a preparation method thereof. The preparation method includes the steps: 1) coating the front and the back of a positive current collector with positive slurry, and performing drying, rolling, slitting and flaking to obtain a positive plate; 2) coating the front and the back of a negative current collector with negative slurry, and performing drying, rolling, slitting and flaking to obtain a negative plate; 3) forming a set by the positive plate, a diaphragm and the negative plate, placing the set into a steel shell and abutting the set to a rolling groove; 4) injecting electrolyte into the steel shell, and then performing capping, pressing and sealing to form a cell; 5) pre-forming the cell by grading current to prepare the high specific energy lithium-ion power battery. The high specific energy lithium-ion power battery prepared by the method has excellent specific energy, long cycle life and high high-low temperature initial capacity, and the preparation method is simple in process and easy to operate and industrialize.

The invention discloses marbled glass ceramics directly employing fusion blast furnace slag and a preparation method of the marbled glass ceramics. The marbled glass ceramics comprises the following raw materials, by mass, 55-75 parts of blast furnace slag flux and 25-45 parts of auxiliary material flux; and auxiliary materials comprise the following components, by mass, 8.5-19.5 parts of quartz sand, 0.5-5.5 parts of limestone, 1-5 parts of sodium carbonate, 2-5 parts of potassium carbonate, 1-4 parts of zinc oxide, 1-4 parts of ammonium di-hydrogen phosphate, 1-2 parts of spodumene, 2.5-5 parts of sodium fluosilicate, 0.5-1.5 parts of sodium fluoroaluminate and 0.5-1 part of borax. The preparation method is characterized in that through controlling the mixed melting temperature and time of the blast furnace slag flux and the auxiliary material flux, a flux mixture is obtained; through forming, annealing and microcrystallization heat treatment, the marbled glass ceramics is obtained. The molten blast furnace slag and the auxiliary materials are mixed in a flux form and the flux mixture having certain micro-inhomogeneity is obtained accurately, then with the combination of subsequent forming and heat treatment technologies and the like, the marbled glass ceramics is obtained, so that the technology is easy to implement, and the influence of uncertainty on a product in a mixing process is reduced.

The invention relates to a cured rubber composition, its preparation and a tire with a component of such rubber composition. A reinforcing resin is used to promote stiffness for the cured rubber composition. The elastomer for the rubber composition is primarily comprised of at least one isoprene-containing elastomer.

The invention belongs to the field of sewage treatment equipment, and relates to a sewage treatment mixing device and assembling and disassembling methods thereof, which aims at solving the problems of the prior art that the structure is complicated, the angle and the agitating diameter of an agitating blade are difficultly adjusted and the blade is not easily disassembled and replaced quickly. According to the technical scheme adopted, an upper shell and a lower shell are rotatably connected in a buckling manner, the blade is connected with an impeller sleeve by a positioning rod, to be capable of relatively rotating so as to adjust the inclination angle of the agitating blade, and the agitating diameter of the extended blade can be adjusted through small holes in the blade sleeve and spring ejector pins in a trapezoidal slot of the positioning rod. According to the sewage treatment mixing device and assembling and disassembling methods thereof, the structure is simple, the angle and agitating diameter of the agitating blade are conveniently adjusted and the blade can be disassembled and replaced quickly.

The invention provides a lithium-rich manganese-based cathode material with a coated and compounded surface and a preparation method of the lithium-rich manganese-based cathode material. A lithium-rich manganese-based cathode material xLi2MnO3-(1-x)LiMO2 is used as a raw material, and is mixed and coated with a lithium ferric manganese phosphate material LiFeyMn1-yMzPO4 / C, wherein the mass of the lithium ferric manganese phosphate material LiFeyMn1-yMzPO4 / C is 0.5 to 5% of the total mass of the lithium-rich manganese-based cathode material with the coated and compounded surface; M in the lithium-rich manganese-based cathode material xLi2MnO3-(1-x)LiMO2 is at least one of transition metals Mn, Ni and Co, and x is smaller than 1 and greater than 0; N in a lithium ferric manganese phosphate material LiFeyMn1-yNzPO4 / C is any two of metals Ti, Mg, Al and Zn, y is smaller than 1 and greater than 0.6, and z is smaller than 0.03 and greater than 0.005; carbon content is 2 to 4% of the mass of the LiFeyMn1-yNzPO4 / C. A lithium ion battery prepared by utilizing the lithium-rich manganese-based cathode material with the coated and compounded surface, which is provided by the invention, has ultrahigh cycling stability in a range of 0 to 30DEG C, and can obviously improve gram capacity playing at a temperature lower than 25 DEG C.

The invention relates to a method for producing sweet potato residue biscuits. The method comprises the following steps of rinsing sweet potato residues with water, filtering and draining with a strainer, and dissolving and mixing oil, eggs and white sugar in a water bath; adding low-gluten flour and wet or dry potato residues, after fully mixing, kneading into a dough, and pressing into a wrapper with a thickness of 2-4mm by a dough pressing machine; and processing the wrapper into a shape meeting the requirement by using a biscuit die, baking and cooking to obtain sweet potato residue biscuits. The wet or dry sweet potato residues with high content of dietary fiber are used as a raw material, and the total dietary fiber and soluble dietary fiber content of the produced biscuits is high; on the basis of keeping the color, smell and taste of original biscuits, vitamins, niacin, folic acid and other nutrients are added; the biscuit can be used as a diet food and a food for regulating blood sugar, blood pressure and serum cholesterol; the sweet potato residues have better adaptability to flour, and the forming effect is good; the biscuit does not contain toxic, hazardous and carcinogenic matters and is safe to eat; the process is simple, the continuity is good, the operation cost is low, and the utilization rate is high; and in the production process, the produced waste is less, and the environment is not polluted.

The invention discloses waste polypropylene fiber rubber recycled concrete and a preparation method thereof. The waste polypropylene fiber rubber recycled concrete is prepared from the components in parts by weight: 1-10 parts of polypropylene fiber, 5-20 parts of a rubber powder, 0-1600 parts of a recycled coarse aggregate, 0-1600 parts of gravels, 300-500 parts of sand, 300-500 parts of cement, 150-300 parts of water, and 50-100 parts of an additive. The waste polypropylene fiber rubber recycled concrete can be applied in road construction, reduces road noise and vibration, increases the collision buffer distance between automobile tires and roads, and increases the elasticity and toughness of a concrete pavement. At the same time, the used polypropylene fiber and the used rubber powder are mostl.y polypropylene fiber clothing, discarded tires and the like, not only are the pollution of the wastes to the environment and the occupied cultivated land area reduced, but also the elasticity and toughness of the concrete can be improved, concrete pavement cracks generated due to temperature change are reduced, and thus the waste polypropylene fiber rubber recycled concrete is not only environmentally friendly but also has relatively high practical value during application.

The invention provides energy-saving and environment-friendly type waste water treatment equipment based on a recycle mixing principle, and the equipment comprises a shell, wherein a plurality of support legs are fixedly connected with the bottom part of the shell, a rotating shaft is arranged in the internal middle part of the shell, the rotating shaft penetrates through the shell and extends downward, and the bottom end of the rotating shaft is connected with a first driving device; a spiral screw is fixedly arranged on the rotating shaft, a first sleeve is arranged outside the spiral screw in a sleeved mode, a gap is reserved between the bottom end of the first sleeve and the inner bottom part of the shell, the top end of the first sleeve penetrates through the shell and extends upward, and the top end of the first sleeve is connected with a second driving device. The waste water treatment equipment based on the recycle mixing principle has the following beneficial effects: a flocculant can be quantitatively and precisely charged by controlling a third motor, the number of operation workers is reduced by one, and the treatment cost is saved; and the spiral screw, a primary disturbing device and a secondary disturbing device are used for playing a sufficient and effective mixing effect on the waste water and the flocculant, thereby effectively reducing the mixing time and improving the waste water treatment efficiency.

The invention discloses a preparation method of high-efficiency lithium-ion battery slurry. The preparation method comprises 1: adding a powdery active material, a conductive agent and a binder into amixer and carrying out uniform stirring, 2: adding 10 to 40wt% of a solvent into the powdery material obtained in the step 1 and carrying out stirring, 3: adding 30-60 wt% of a solvent into the materials in the step 2 and carrying out stirring, and 4, adding the rest of the solvent into the materials in the step 3, carrying out stirring, carrying out filtration through a screen and discharging the materials. The preparation method reduces processes, is simple and easy, shortens stirring time and improves production efficiency. The prepared slurry is uniform and stable, is not easy to layer and improves lithium-ion battery rate and cycle performances.

The invention designs a movement separation spiral multifunctional food mixing machine. The movement separation spiral multifunctional food mixing machine comprises a spiral mixer, a mixing tank, a movement separation mechanism, a lifting device and a dough scraping device, wherein the movement separation mechanism can meet the power demand of all movements in the mixing machine by one motor; when the motor rotates forwards, materials are mixed by the mixer at different speeds, and when the motor rotates reversely, the mixing tank ascends or descends; due to the spiral and rodless designs of the spiral mixer, the spiral mixer can be used for mixing in a wide range, overcomes the phenomenon of automatic material climbing, and improves the structural performance of the mixer; and the dough scraping device can accelerate the rolling of the materials in the mixing tank so as to improve the mixing effect. The multifunctional food mixing machine overcomes the shortcomings of a conventional mixing machine that a plurality of power sources are needed and the mixing efficiency is low, thus being very beneficial to the production and generalization of the mixing machine. According to the mixing machine, the production cost is reduced, the mixing is more sufficient, and the mixing time is greatly shortened.

The invention relates to application of an impinging stream-rotating disc coupling reaction device in preparation of an ultrafine magnesium hydroxide fire retardant, and belongs to the technical field of reaction devices of inorganic chemical industry. The impinging stream-rotating disc coupling reaction device comprises an impinging stream-rotating disc coupling reactor, the impinging stream-rotating disc coupling reactor comprises a housing, a circular disc is arranged at the center inside the housing, and the circular disc can rotate with a rotating shaft, an A liquid inlet pipe and a B liquid inlet pipe are arranged on the top of the housing, a liquid redistributor is connected to the lower end of the A liquid inlet pipe and the B liquid inlet pipe, two nozzles at the lower end of the A liquid inlet pipe and the B liquid inlet pipe are oppositely and symmetrically arranged, the liquid redistributor is arranged above the circular disc, an A liquid storage tank and a B liquid storage tank are respectively arranged at the two sides of the reactor, and the A liquid storage tank and the B liquid storage tank are respectively connected with the A liquid inlet pipe and the B liquid inlet pipe of the reactor via pumps and flowmeters. The device has the advantages of simple structure, high mixing efficiency, stable operation, low energy consumption and easy maintenance, and a prepared product has good dispersibility and uniform particle size distribution.

A stirring unit for stirring a fluid contained in a vessel includes a mixing body for stirring the fluid by rotating around a rotation axis, and a magnet or a magnetic substance for receiving a rotating magnetic field for rotating the mixing body, in which a suction port and a discharge port for the fluid are provided on a surface of the mixing body, a plurality of flow paths connecting the suction port and the discharge port are provided inside the mixture, the suction port is disposed at a position on the rotation axis or at a position closer to the rotation axis than the discharge port, and the discharge port is disposed at a position outside the rotation axis than the suction port.