197results about How to "Precisely control the amount added" patented technology

The invention relates to a method for separating tellurium from tellurium slag, which comprises the following steps: firstly, grinding the tellurium slag, leaching out the obtained product in an aqueous solution, purifying and neutralizing a water leaching solution, and producing tellurium dioxide; secondly, performing hydrochloric acid leaching on water leaching residue in a hydrochloric acid system, cooling and filtering an acid leaching solution, and returning acid leaching residue to an anode sludge treatment process; thirdly, performing controlled potential reduction on the acid leaching solution to produce coarse tellurium, and performing roasting and impurity removal on the coarse tellurium and the tellurium dioxide produced by neutralization to obtain pure tellurium dioxide; and fourthly, using the conventional method to reclaim valuable metals such as copper, bismuth, tin, and the like from a reduced solution respectively. The total tellurium leaching rate of the method is as high as more than 98 percent, and the produced coarse tellurium has the advantages of low content of impurity elements, small amount of return slag, small modification amplitude of equipment, short treatment time, and low treatment cost.

The invention discloses a sample processing device for soil heavy metal detection and a processing method thereof. The processing device comprises a hopper, a screen-out device, a preprocessing device, an allocation device, a sample rack and a digestion device. The screen-out device comprises a separating base, a positive electrode suction device, a screen-out fan and a collecting groove. The preprocessing device comprises a drying chamber, an electric heating wire, a lifting crushing screen and a sample suction port. The suction pump of the allocation device is connected with the sample suction port through a pipeline. The allocation device is connected with a metering valve. The sample rack comprises a rotating base used for rotating the sample rack at a fixed angle. A plurality of sample tubes are circumferentially arranged on the rotating base. An ultrasonic generator is arranged at the connection between the sample tubes and the rotating base. The digestion device comprises a storage tank and a digestion liquid peristaltic pump. In a word, the sample processing device has the advantage of novel structure, perfect method, good processing effect, small detection error and the like.

The present invention discloses an austenite gray cast-iron material with a weight percentage of chemical composition as follows: C 1.5-2.9 percent, Si 1.5-3.0 percent, Mn 5.0-7.5 percent, Ni 5.0-8.0 percent, Cu 3.0-6.0 percent, Al more than 0 and less than or equal to 0.3 percent, the total amount of impurity less than or equal to 0.25 percent and the remainder is Fe. The metallurgical structure of the austenite gray cast-iron material is that A-type graphite and fine carbides with a quantity of less than or equal to 4 percent are distributed on the austenite matrix. The preparing method is that an IF (intermediate frequency) induction furnace is used to melt the charge. When the temperature reaches 1500 degrees Celsius system, a casting ladle is poured in and an inoculation in the ladle is conducted by using shivers of silicoferrite 75 and ZL109. When the temperature reaches around 1450 degrees Celsius system, the pouring is conducted. The material can be used for the inlaid ring of a piston, the cost is lower than the austenite gray cast-iron of L-NiCuCr1562 and the performance is approximate or equal to the austenite gray cast-iron of L-NiCuCr1562.

The present invention relates to aluminum silicon alloy alterative used for primary crystal silicon in thinning aluminum silicon alloy and method for making same, being characterized by its mass percent constitution as follows: phosphorus: 0.5%-20%; titanium: 3%-5%; carbon: 0.1-0.8%, and the allowance is aluminum. Said preparing process comprises the following steps: (1) homogeneously mixing red phosphorus of 10-45% and powdered aluminum of 55-90%, based on the weight of the mixture; (2) compacting the mixing powder mentioned above into blocks; (3) synthesizing aluminum-phosphorus alloy by self spreading at vacuum or under inert atmosphere; (4)block-compacting again after pulverizing and ball-milling aluminum-phosphorus alloy prepared in step (3); (5) getting, through weighing, activated char and potassium fluotitanate powder, homogeneously mixing them and block-compacting, with a mass ratio of 7-25 of titanium to carbon; (6) melting commercial-purity aluminum and adding, in sequences, mixing powder compact of activated char and potassium fluotitanate, compact of aluminum-phosphorus alloy therein, casting it into ingots or extruding it into wires after stirring it to complete fusion.The alloy in accordance with the present invention doesn't make pollutions during its preparing and using course; can be added to a launder as aluminum-titanium-boron alloy, wherein the deterioration process is simple and the alloy is added in a normal casting process; and the deterioration temperature is low, deterioration effect is stable and long acting.

The invention discloses a method for preparing mint-typed cigarette paper. A new material: functional molecule encapsulation menthol is selected; the performances of the molecule encapsulation menthol such as low volatility, low transitivity and thermal stability are utilized and alcohol is used as a solvent; furthermore, new technologies such as internal machine coating or external machine coating, low-temperature drying of a baking cylinder and the like are utilized during the production of the cigarette paper, therefore, the adding uniformity and remaining performance of the menthol on the cigarette paper are ensured, the shortages that the mint ingredients in the original mint cigarette are easy to be volatilized, have unstable effect and the like are overcome, and the mint cooling feeling of the cigarette is always kept during smoking process. The mint-typed cigarette paper greatly improves the quality of the mint-typed special cigarette and the good running performance of the production process, becomes one highlight for the special cigarette paper and is expected to be a new economic growing point for the cigarette paper products.

The invention discloses a preparation method and preparation device of a porous medium composite phase-change material. The method and device can be used for packaging a low-temperature organic phase-change material by a porous propping material to obtain the high-airtightness composite phase-change material. The preparation method comprises the following steps: carrying out vacuum treatment on a porous propping material; preparing an organic precursor solution; preparing a packaging substance emulsion; compounding the packaging substance emulsion and porous propping material; and drying and curing to form the porous medium composite phase-change material. The preparation device comprises a phase-change substrate emulsification container, a liquid automatic sampler, a packaging composite container, a vacuum pump and a temperature controller. The porous medium composite phase-change material prepared by the preparation method has the advantages of firm packaging, low leakage tendency, convenient manufacturing process, simple technique, favorable economy and high applicability.

The invention discloses a rare earth adding control method for high-strength rare earth girder steel. The cleanliness of molten steel of rare earth high-strength girder steel and the yield of rare earth in the steel is improved by optimizing the steel-making process. In early-stage rare earth steel research, due to the fact that the key control processes such as a rare earth adding mode, adding time and the like are not completely mastered, the yield of rare earth is low and is about 35%; and meanwhile, the number of rare earth composite inclusions in steel is large, and the continuous castingpourability of a casting machine is poor. In order to increase the yield of the rare earth, the cleanliness of molten steel is guaranteed before the rare earth is added, and the component uniformityof the rare earth in the molten steel is guaranteed after the rare earth is added. Meanwhile, protective pouring is conducted in the casting process of a casting machine, secondary oxidation of the molten steel is prevented, and the yield of the rare earth in the steel can be remarkably increased.

The invention discloses a method and a device for preparing tungsten powder reinforced aluminum matrix composite. The method comprises the following steps: mounting a quantitative tungsten powder supply device on a high-pressure inert gas input pipe of a device for atomizing, spraying and depositing aluminum or aluminum alloy liquid, taking high-pressure inert gas as a flow carrying medium, spraying the tungsten powder to the surfaces of aluminum or aluminum alloy micro-droplets formed by atomizing, enabling the tungsten powder to disperse and attach onto the surfaces of the aluminum or aluminum alloy micro-droplets, then spraying and depositing the tungsten powder and the aluminum or aluminum alloy micro-droplets to a substrate and solidifying to prepare the tungsten powder reinforced aluminum matrix composite. The device comprises a device for atomizing, spraying and depositing aluminum or aluminum alloy liquid, wherein a quantitative tungsten powder supply device is mounted on a high-pressure inert gas input pipe of the device for atomizing, spraying and depositing aluminum or aluminum alloy liquid. By virtue of the method, the high-pressure inert gas is taken as the flow carrying medium for spraying the tungsten powder and attaching the tungsten powder onto the surfaces of the aluminum or aluminum alloy micro-droplets, then the tungsten powder and the aluminum or aluminum alloy micro-droplets are solidified to prepare the tungsten powder reinforced aluminum matrix composite; the agglomeration of the tungsten powder can be effectively prevented; the tungsten powder reinforced aluminum matrix composite with uniformly distributed tungsten powder is prepared.

The invention relates to a method for preparing full-nutrient solid cane molasses, namely the traditional liquid cane molasses is processed into full-nutrient solid cane molasses. The method comprises the following steps: putting liquid cane molasses without any pretreatment directly in a vacuum drying machine; removing moisture under the heating and vacuum condition; and smashing after cooling, thus powder full-nutrient solid cane molasses is obtained, wherein the drying temperature is controlled at 50-130 DEG C, and the vacuum degree is controlled within minus 0.05-minus 0.10 MPa. By adopting the method provided by the invention, the liquid cane molasses with 20-30% of water content can be converted into the full-nutrient solid cane molasses with 0.5-2.5% of water content, and the original nutrition components of the cane molasses can be preserved without influencing the using efficacy of the original cane molasses; the storage and transportation costs can be lowered; the cane molasses is convenient to use; the quality guarantee period of products is prolonged, and the application range of the products can be widened; and the method has less operation steps, has low production cost, and is easy to be industrialized.

The invention provides a quantitative liquid adding device for a full-automatic medical cleaner, which comprises a liquid medicine input part, a liquid medicine mixing chamber, an exhaust part, a pure water input part, a liquid medicine output part and a control system, wherein the liquid medicine input part is connected with an external liquid medicine storing container; the liquid medicine output part is used for discharging liquid medicine; and the control system is electrically connected with all parts. The quantitative liquid adding device is characterized by also comprising a peristaltic pump which is arranged between the liquid medicine input part and the liquid medicine mixing chamber, the peristaltic pump is electrically connected with the control system to quantitatively convey the liquid medicine in the external liquid medicine storing container to the liquid medicine mixing chamber. The invention also provides a control method of the quantitative liquid adding device. As the peristaltic pump driven by electric power is used for adding liquid, firstly, without additionally adding external high-pressure gas to drive the liquid medicine to enter the mixing chamber from the storing container, the quantitative liquid adding device effectively prevents the problems of liquid medicine scattering and the like caused by air pressure variation; and secondly, as the peristaltic pump can accurately control the added quantity of the liquid medicine per se, the whole quantitative liquid adding device has simpler structure and accurate added quantity of the liquid medicine and is easier to control.

The invention relates to an automatic hydroponic cultivation system and method. The system comprises a PLC control system, and a nutrient solution circulation system, an illuminating system, a temperature and humidity adjusting system and an air circulation system which are connected with the PLC control system, and the nutrient solution circulation system is connected with multiple hydroponic frames. According to the system, according to the set temperature, humidity, air circulation time, nutrient solution EC value, PH value and the like, a nutrient solution reaching the set standards can beautomatically added, the nutrient solution flowing down from the hydroponic frames is recycled for secondary adjusting, the nutrient solution reaching the set EC value and PH value is output from a liquid storage barrel continuously, then the volume of addition and concentration of the nutrient solution are accurately controlled, and the growing environment of hydroponic plants is guaranteed.

The invention relates to a production method of wet phosphoric acid byproducts comprising highly pure and highly white alpha-semi-hydrated gypsum and an inorganic-organic compound fertilizer. The method comprises the following steps: carrying out an acidolysis reaction on phosphoric acid and phosphate rock powder, adding a filter aid to a mixed slurry obtained after the reaction, carrying out solid-liquid separation, washing the obtained solid phase to obtain washing water and a solid, crushing the solid, sending the crushed solid into a granulator, reacting the crushed solid with gasified ammonia in the granulator, adding fertilizers with different formulas, granulating, drying the granulated material, screening, cooling, and packaging to obtain the inorganic-organic compound fertilizer; and introducing a clear liquid obtained after the acidolysis and solid-liquid separation into a decalcification and crystal transformation tank, adding a sulfuric acid solution and a crystal transformation agent, carrying out decalcification and crystal transformation reactions, carrying out solid-liquid separation to obtain a solid and a clear liquid, adding the solid into hot water, washing, and drying to obtain the highly pure and highly white alpha-semi-hydrated gypsum. The highly pure and highly white alpha-semi-hydrated gypsum with the advantages of excellent performances, white appearance and wide uses can be produced, and the inorganic-organic compound fertilizer can be produced by using organic matters, phosphorus and resources residual in acid insoluble substances.

The invention relates to a hard carbon negative electrode composite material and a preparation method and application thereof, and the preparation method comprises the following steps: pretreating a carbon-containing raw material to prepare a hard carbon precursor; mixing the hard carbon precursor with a lithium-containing compound and a binder to prepare a solid pre-lithiated hard carbon precursor; carrying out sintering treatment on the pre-lithiated hard carbon precursor to prepare pre-lithiated hard carbon; and carrying out carbon coating treatment on the pre-lithiated hard carbon to form a carbon coating layer on the surface of the pre-lithiated hard carbon. Exogenous lithium is introduced into the surface and the bulk phase of hard carbon to form a lithium-carbon compound, so that a certain amount of lithium is filled in a stable structure and pores of the hard carbon in advance, and the consumption of effective lithium in the battery caused by first formation is made up. A carbon coating layer is matched to reduce the defects of the hard carbon surface and cover the lithium-carbon compound with relatively high chemical activity, so that the lithium supplement effect can be achieved, the side reaction of an active substance and an electrolyte can be reduced, the first coulombic efficiency can be synergistically improved, and the cycle life of the battery can be prolonged.

The present invention relates to the field of resource environment, and specifically provides a method for deep recovery of antimony from an arsenic alkali residue leaching solution by using electric potential control. The method specifically comprises the following steps: (1) material adding: adding an arsenic alkali residue leaching solution to an oxidation tank, adding an antimony removing agent hydrogen peroxide to the oxidation tank from the bottom of the oxidation tank, and stopping antimony removing agent addition when an electric potential achieves -530 mv to -640 mv, wherein a hydrogen peroxide addition time is controlled to 1 / 3-1 / 2 of the total oxidation time; (2) oxidation: continuously stirring when antimony removing agent addition, and carrying out an oxidation reaction, wherein the total oxidation time is 40-90 min, and the oxidation process is maintained to a temperature of 20-80 DEG C; and (3) filtration: wherein the filter residue is a sodium antimoniate product, and the filtrate is provided for arsenic and alkali recovery. According to the present invention, an oxidation degree of the antimony in the solution can be accurately controlled, the obtained sodium antimoniate is sold as a product or returns to an antimony smelting system as an antimony raw material to be recycled, the antimony in the leaching solution can be recovered to the maximal degree, antimony resource waste is avoided, and no secondary pollution is generated.

The invention belongs to medicament adding technical field, and concretely relates to an intelligent on-line medicament adding system. The system comprises a medicament storage device, a medicament adding pipeline and a control system. The system is characterized in that the medicament adding pipeline includes a medicament conveying pipeline, and the medicament conveying pipeline is provided with a metering pump for adjusting the medicament conveying amount, a PH meter for monitoring PH values and a plurality of valves for controlling the pipeline to be on and off; and the control system includes a PLC core controller, a PID digital-analog controller, a GPRS module, a switch and a DCS controller. On-line acquired analog quantities such as a PH value, a liquid level, flow and temperature are taken as feedback values, a PID mathematic model is established, a fuzzy adaptive control algorithm is optimized, a diagnosis system is established, the medicament adding amount is calculated, then control data is input to the metering pump, and thus the adding amount of medicaments is controlled accurately.

The invention belongs to the technical field of sludge slurry treatment, and particularly discloses a sludge slurry treatment method and an integrated system. The sludge slurry treatment method comprises the steps: S1, evenly stirring and feeding sludge slurry into a curing agent stirring box, adding a curing agent into the curing agent stirring box and stirring, and obtaining slurry-curing agentmixed slurry; S2, pumping the slurry-curing agent mixed slurry into a flocculating agent stirring box, uniformly adding a flocculating agent solution in the pumping process, and then stirring to flocculate and deposit the slurry-curing agent mixed slurry to obtain slurry-curing agent-flocculating agent mixed slurry; S3, pumping the slurry-curing agent-flocculating agent mixed slurry into a filterpress for dehydration to obtain a mud cake, and treating the mud cake through a granulating device to obtain mud particles. The sludge slurry with ultrahigh water content is directly converted into dense mud particles through the integrated flocculation conditioning-filter pressing dehydration-granulation device so that the problem that the tail end of a huge amount of sludge slurry is difficult to dispose can be effectively solved, and the obtained mud particles and plain soil mixed filler can relieve the dilemma of serious shortage of sandstone filler.

A preparation method for high-purity alumina powder includes: preparing aluminum alkoxide in liquid state at the room temperature by means of reaction of metallic aluminum with sec-butyl alcohol, using the reduced pressure distillation method for purifying, and preparing the high-purity alumina powder by means of hydrolyzing, reduced pressure distillation and calcinations. Using the method to prepare high-purity alumina powder has the advantages of simple preparation process, no pollution, low energy consumption, fine operating conditions, zero emission and the like. The alumina powder prepared by the method is applicable to the field of catalysts and can also be applied to the fields of laser crystals, sapphires, transparent alumina ceramics, sodium lamps, metal halides, high-grade abrasives and the like.

The invention provides spheroidal graphite cast iron. The spheroidal graphite cast iron comprises, by mass, 3.35%-3.7% of C, 2.3%-2.7% of Si, 0.35%-0.55% of Mn, 0-0.035% of P, 0-0.015% of S, 0.016%-0.018% of Re, 0.02%-0.04% of Mg and 0.55%-0.85% of Nb, and the total amount of trace elements including Cu, Zn, Sn, Mo, Al and Zr is smaller than or equal to 0.22%. The tensile strength of the spheroidal graphite cast iron is larger than 750 MPa, the yield strength is about 560 MPa, and the percentage elongation after fracture is 7.5% or above. The invention further discloses a preparation method of the spheroidal graphite cast iron. According to the preparation method of the spheroidal graphite cast iron, the processes of normalizing as well as hardening and tempering heat treatment are omitted, and the prepared spheroidal graphite cast iron has high strength and high plasticity at the same time.

The invention relates to corrosion-resistant rare earth bearing steel and a preparation method of the corrosion-resistant rare earth bearing steel. The corrosion-resistant rare earth bearing steel comprises the following components of, by weight percentage, 0.90-1.10wt% of C, 0.20-0.40wt% of Si, 0.20-0.50wt% of Mn, 1.35-1.70wt% of Cr, 0.12-0.26wt% of Cu, 0.015-0.035wt% of Alt, P<=0.020wt%, S<=0.010wt%, 0.003-0.005wt% of a rare earth alloy, and the balance of Fe and inevitable impurities. By adding trace rare earth, the sizes of inclusions are refined, the number of the inclusions is reduced, and the fatigue life of the bearing steel is remarkably prolonged; and meanwhile by adding the element Cu, the corrosion resistance of the bearing steel is improved, and the surface quality of thebearing steel is remarkably improved.

The invention discloses a dedicated large-sized saucepan for a mess with dishes cooked in a large pot at one time. The dedicated large-sized saucepan comprises a pot body, a bracket, a first stirring motor, a first stirring shaft, a first stirring blade, a top cover, an electric control box and a heating device, wherein a plurality of seasoning inlets are formed in the upper part of the pot body and are connected with seasoning storage tanks through seasoning pipelines; a second stirring motor, a second stirring shaft and a second stirring blade are arranged on one side of the pot body; the second stirring blade is located on the inner side edge of the pot body; the lowest point of the second stirring blade is located above the highest point of the first stirring blade; a power switch and a PLC are arranged in the electric control box; flow control structures are arranged in the seasoning storage tanks; hydraulic pumps are arranged on the multiple seasoning pipelines; air blowers are arranged on the multiple seasoning pipelines; and a slag outlet is formed in one side of the bottom of the pot body. The dedicated large-sized saucepan is higher in stirring efficiency and better in stirring effect, and can automatically realize addition of seasonings and precise control of the adding amounts of the seasonings, so that the labor intensity of a kitchener is reduced, and the taste of the dishes cooked in the large pot at one time is improved.

The invention relates to a full-automatic fatty acid value detection system and a detection method and belongs to the technical field of fatty acid value detection for cereals, such as corn, wheat, rice and the like, and products thereof. The system includes: a titration pretreatment unit, which is used for stirring a sample; a quantitative liquid adding unit, which is disposed on one end of a work bench, a titration analytic unit which is arranged on the other end of the work bench, and a transfer device which moves the sample from the quantitative liquid adding unit to the titration analyticunit. The titration pretreatment unit is connected to the quantitative liquid adding unit through a transfer pump and a pipeline. By means of the system, the sample is subjected to steps of reagent extraction, vibrating extraction, filtration, quantitative transfer, indicator addition, and diluent addition; then the sample is fed into the titration analytic unit and is analyzed in order to finally obtain a detection result. The detection system can achieve non-manual intervention in the detection process and can complete the whole treatment process on a plurality of samples in one time. The system is high in treatment speed, allows simultaneous treatment on a plurality of samples and allows continuous sample injection and titration analysis, and has good repeatability. The system and method achieve full-automation on fatty acid value detection.

The invention discloses a method for removing copper and cadmium through zinc hydrometallurgy and purification. According to the method, a conventional process of removing copper and cadmium through zinc powder replacement is subjected to fine separation stepwise, firstly, the zinc powder is added to remove copper, then zinc powder is added again to remove cadmium, finally copper and cadmium are deeply removed, and a subsequent purification process is conducted after a purified product is qualified. Compared with the traditional process of removing copper and cadmium through purification, thefine operation is adopted, the zinc powder consumption is greatly reduced, the purification cost is reduced, the content of produced copper residues and cadmium residues is high, and the copper residues and the cadmium residues are easy to dispose; and the process is simple and reliable, industrial production can be easily achieved, and excellent economic benefits are achieved.

The invention relates to a solid condiment feeder and a stir-frying machine. The solid condiment feeder comprises: a storage chamber having a discharge port and a receiving cavity for storing a solidcondiment; a screw rod arranged at the bottom of the receiving cavity and capable of rotating to push the solid condiment to the discharge port; a receiving box arranged below the discharge port to receive the solid condiment from the discharge port; a weighing mechanism for weighing the receiving box. The solid condiment feeder has the advantages that the solid condiment in the storage chamber ispushed to the discharge port of the storage chamber through the screw rod and falls into the receiving box below the discharge port, the receiving box is weighed by the weighing mechanism, the addition of the solid condiment is precisely controlled, and adding of the solid condiment is achieved, while quantitative adding of the solid condiment is guaranteed.

The invention provides a system for the online control of the concentration of a chemical solution, and a method thereof, and belongs to the technical field of chemical solution monitoring analysis. The system comprises a near infrared grating spectrograph used for the online acquisition of the spectral data of the chemical solution, a concentration test device used for analyzing the spectral data to obtain the concentration data of the chemical solution, an analysis device used for the calibration and calculation of the concentration data to output a control signal of the quantitative addition of a soup, and a soup adding device. The chemical solution concentration online control precision of the system is high, and products prepared through a wet technology adopting the system and the method have a high quality and a low rework rate.

The invention provides a manufacturing method of an N type / P type monocrystalline silicon crystal ingot. During the lifting growth of the crystal ingot, monocrystalline silicon strips containing uniform distribution opposite type conducting elements (sub doping elements) are molten through laser arrays; the sub doping elements are added into the flux in a continuous and adjustable way; carriers increased in the crystal ingot due to the fast rise of the concentration of main doping elements in flux caused by dephlegmation are counteracted, so that the problem of fast reduction of the electrical resistivity in a late growth stage of the crystal ingot growth is solved. By precisely controlling the addition quantity and the addition speed of the sub doping elements, the carrier density in the crystal ingot in a new crystallization region is stabilized, so that the electrical resistivity of the new crystallization region is stabilized; the fluctuation amplitude of the axial electrical resistivity of the whole crystal ingot is reduced; the utilization rate of the crystal ingot and the electric performance of wafers are improved.

The invention relates to an application method of a papermaking wet-strength agent, and belongs to the field of pulping and papermaking. The method comprises direct addition of the wet strength agent into slurry, the method is characterized in that: the adding amount of the wet strength agent accounts for 0.25-0.75% by mass of the absolutely-dry slurry. A preparation method of the wet strength agent comprises the following steps: firstly, dissolving diethylenetriamine into water for preparing a solution with the mass percentage concentration of 30%, then adding adipic acid to the solution, then adding a modifier M into the solution to generate intermediate polyamide polyamine, and continuing to add epichlorohydrin into the intermediate solution; wherein the mass ratio of adipic acid to diethylenetriamine to modifier M is 7:4:2. The modified PAE (polyamide polyamine epichlorohydrin) wet strength agent of the invention can be directly added into the slurry, by precise control of adding amount, the paper strength can be ensured, meanwhile the cost is reduced, and the method can reduce wastewater pollution, and reduce corrosion to papermaking equipment.

The invention relates to a preparation method of a magnesia-alumina-spinel high-grade thermal-insulation material, which comprises the following steps: by using 56-71.8 parts by mass of white alundum fine powder, 15-28.2 parts by mass of fused magnesite and 12.5-17.5 parts by mass of rho-Al2O3 as raw materials, carrying out co-grinding in a ball grinder for 1-5 hours to obtain raw material powder; adding 37-52 parts by mass of water solution containing 2-5 parts by mass of additional component to obtain raw material slurry; weighing a right amount of 1 wt% foaming solution, and foaming for 3-5 minutes by using a high-speed stirrer to obtain foam; and adding the foam into the raw material slurry, calibrating the volume, stirring uniformly, carrying out cast forming, drying, and firing by keeping the temperature at 1550-1650 DEG C for 3-6 hours. The particle size of white alundum fine powder is 180 meshes; the particle size of the fused magnesite is 200 meshes; and the additional component comprises a billet reinforcer containing one or more of polyvinyl alcohol, calcium lignosulphonate and starch, and a rho-Al2O3 hydration control agent containing one or more of sodium carbonate, sodium hexametaphosphate, sodium tripolyphosphate and lithium carbonate.

The invention relates to a ferrite stainless steel grain refiner, a preparation method and an application method thereof. The ferrite stainless steel grain refiner comprises TiN and Fe powder in massratio of (0.01-0.06): (99.99-99.94). The ferrite stainless steel grain refiner provided by the invention achieves the effect of refining ferrite stainless steel grains by inducing nucleation of transgranular ferrite, solves a series of problems in production and application processes as the grains of the ferrite stainless steel are thick, and can be applied to die casting and continuous casting processes.

The invention discloses a device for preparing a scandium-containing aluminum alloy material. The device comprises a scandium-containing oxide decomposition control part, an electrolytic cell body and a cooling part, wherein an electrolyte input pipeline is arranged at one end of the electrolytic cell body, and an alloy blank output pipeline is arranged at the other end of the electrolytic cell body; an electric heating part, a graphite tank, an anode conductive tube and a cathode conductive rod are sequentially arranged in the electrolytic cell body; the scandium-containing oxide decomposition control part is connected with the electrolytic cell body through a scandium-containing input pipeline; and the cooling part is arranged at the tail end of the alloy blank output pipeline and is connected with a cooling circulation system. In addition, an electrochemical sensor and a current sensor arranged in the electrolytic cell body are simultaneously connected with the scandium-containing oxide decomposition control part. According to the device, ore with high scandium enrichment serves as a raw material, so that the production cost is greatly reduced, and the production process is simplified. Moreover, the activity of fluorine ions in the electrolyte is detected through the electrochemical sensor, and the addition amount of the scandium-containing oxide is accurately controlled, so that the performance of the scandium-containing aluminum alloy material is improved.

The embodiment of the invention relates to the technical field of rubber, in particular to a low-odor flame-retardant rubber floor and a preparation method thereof. The rubber floor is prepared from,by weight, 80-100 parts of styrene-butadiene rubber, 15-25 parts of high-styrene resin, 45-55 parts of white carbon black, 40-55 parts of kaolin, 2-4 parts of a light stabilizer, 5-8 parts of an antioxidant, 40-60 parts of an inorganic flame retardant, 60-80 parts of melamine cyanurate, 4-8 parts of a silane coupling agent, 2-5 parts of an accelerator and 3-6 parts of a vulcanizing agent. The low-odor flame-retardant rubber floor and the preparation method thereof have the advantages that the light stabilizer and the antioxidant are properly mixed, so that the generation of low-molecular-weight volatile substances after ageing caused by ultraviolet irradiation and oxidation reaction during use is relieved, thereby greatly reducing the odor and solving the problem of pollution.