85results about How to "Uniform and stable product quality" patented technology

The invention discloses a preenrichment-three segment suspension roasting-magnetic separation treatment method of complex refractory iron ores, and belongs to the technical field of mineral processing. The method comprises the following steps: 1, levigating the complex refractory iron ores, carrying out weak magnetic separation, and carrying out strong magnetic separation on mine tailings; 2, putting concentrate obtained after strong magnetic separation in a suspension roasting furnace, and heating to 450-800DEG C in a suspension state in order to carry out pre-oxidation roasting; 3, introducing nitrogen to displace air, and introducing a reducing gas to carry out reduction in a suspension loose state; 4, introducing air when the temperature decreases to 250-400DEG C in order to oxidize, taking out the obtained material when the temperature decreases to below 100DEG C, and carrying out ore milling; and 5, carrying out third segment magnetic separation, and mixing concentrate obtained after three segment magnetic separation with concrete obtained after the weak magnetic separation to obtain finial concentrate. The method has the advantages of simple process, improvement of the recovery rate of the complex refractory iron ores, strong adaptability, safe and reliable process, uniform and stable product quality, energy saving and consumption reduction.

The invention relates to the production techniques of iron ore concentrate of refractory ore, in particular to a preparation method for producing strong-magnetism magnetite through refractory weak-magnetism oxidized iron ore. The method comprises the following steps that firstly, the crushed iron ore is ground into fine ore; then the fine ore is subjected to low-temperature roasting, and during the low-temperature roasting, the fine ore is made to be in a roasting system to be preheated and roasted; the roasted ore enters a cooling system to be cooled; and then the cooled roasted ore is subjected to size mixing and sent to a magnetic separation system to be separated, and high-grade iron ore concentrate is obtained through separation. According to the method, the process is simple, the temperature and air flow are distributed uniformly, control is easy, the automation degree is high, the number of operation components of equipment is small, refractory siderite and limonite can be treated, the magnetizing roast efficiency of the refractory iron ore is high, heat is substantially recycled during roasting, the roasted ore is stable in quality and high in magnetic separation efficiency, and the technical indexes that the grade of the iron ore concentrate is larger than 60%, and the iron recycling rate is larger than 85% can be achieved.

The invention relates to a three-stage suspension roasting-magnetic separation method for hematite-limonite mixed iron ores and belongs to the technical field of mineral processing. The method comprises the following steps: (1) milling the hematite-limonite mixed iron ores, then, putting the milled material into a suspension reacting furnace, and enabling the material to be in a suspended state; heating to the temperature of 450-800 DEG C, so as to carry out preoxidation roasting; (2) stopping heating, and introducing nitrogen gas to displace air; introducing reductive gas, and enabling the material to be in a suspended loose state, so as to carry out reduction; (3) displacing unreacted residual reductive gas, introducing air to carry out reoxidation when the temperature is lowered to 250-400 DEG C, and then, taking out and carrying out secondary milling; (4) carrying out magnetic separation under the condition that the intensity of a magnetic field is 60-100kA/m. According to the method disclosed by the invention, the process is simple, the recovery ratio of highly-difficultly-separated ores is increased, the adaptability of the method is strong, the process is safe and reliable, and the product quality is uniform and stable; the method has the advantages of energy saving and consumption reducing.

The invention provides a quality control method of a preparation of white paeony roots. The method comprises the following steps of: establishing a synchronous content measuring method of white paeony root herbs, white paeony root total glycosides and paeoniflorin and albiflorin in the white paeony root preparation by adopting the same liquid-phase chromatography condition; and accurately measuring the contents of the paeoniflorin and the albiflorin. The method is simple to preprocess a sample, keeps complete characteristic components and provides a stable sample solution and has higher accuracy, favorable reproduction and a certain specificity; characteristic peaks in the obtained fingerprint map have favorable separation effect, the fingerprint maps of the white paeony root herbs, the white paeony root total glycosides and the preparation have favorable relativity; the standard fingerprint map of the white paeony root herbs is established at a new angle by utilizing the relativity research of the fingerprint maps, can be used for identifying the qualities of the white paeony root herbs and improving the controllability of the production process of the white paeony root preparation and is favorable to ensuring the quality stability and the clinical curative effect of the white paeony root preparation.

A continuous quenching line for large-diameter tube and bar materials is provided. Along the moving direction of tube and bar materials, a V-shaped inclined roll transmission continuous heating furnace is connected to an end of an automatic material charging machine; a multifunctional quenching machine is connected to an end of the V-shaped inclined roll transmission continuous heating furnace; the multifunctional quenching machine is connected to an automatic material discharging machine; a water collecting pool is disposed at the lower part of the multifunctional quenching machine; an automatic control system controls the devices from the automatic material charging machine to the automatic material discharging machine; continuous horizontal heat processing of alloy steel, stainless steel, light alloy bar and tube materials with a diameter of 100-800 mm and a length of above 2000 mm (a wall thickness of below 100 mm) can be performed. During the heating and quenching processes, the material both moves forward and performs self-rotation, does not bend or deform, is heated and quenched uniformly, and has a deep quenched layer, and the invention has the functions of performing quenching, solid solution treatment, normalization processing, annealing processing and the like of alloy tool steel tube and bar materials, alloy structure steel tube and bar materials, heat resistant steel tube and bar materials, various stainless steel tube and bar materials, aluminium alloy tube and bar materials, and the like.

The invention discloses a device and method for rapidly forming a metal part through induction heating. The device comprises a base plate, a front heating unit and an induction smelting unit. The base plate is located below the induction smelting unit and used as a platform for metal part forming. The front heating unit is located between the base plate and the induction smelting unit and used for forming a uniform temperature field. The induction smelting unit comprises a support and a smelting crucible arranged on the support. An induction coil is arranged on the smelting crucible. The outlet end of the smelting crucible is provided with a smelting crucible nozzle opposite to the base plate. The inlet end of the smelting crucible is connected with an air inlet through a rubber plug and used for providing inert gas for the smelting crucible. The method is used for achieving induction heating and rapid forming of the metal part through the device. The device and method have the advantages of being high in machining flexibility, small in subsequent machining amount and the like.

The invention discloses a synthetic rubber wet mixing technology. The synthetic rubber wet mixing technology comprises the following steps of (1) liquid preparation, wherein synthetic rubber is placedin a container, white carbon black emulsion is added into the synthetic rubber dropwise at a stirring speed of 600 r/min, after dropping is completed, stirring is conducted at 1,000 r/min for 30 minto enable the emulsion to be mixed evenly, the stirring speed is reduced to 800 r/min, sulfamic acid, an accelerant NS, stearic acid and an anti-aging agent are added into the emulsion in sequence during stirring, and after adding is completed, stirring is conducted continuously for 45-48 min to obtain latex mixed liquid; (2) coagulation; (3) collection; (4) stirring, wherein a rubber mixture is stirred in a rubber wet mixer; (5) drying, wherein the stirred mixture is subjected to flocculation, rubber washing and solvent removal to obtain synthetic rubber. According to the synthetic rubber wetmixing technology, by combining two modes of surface modification and mechanical dispersion, the interfacial compatibility among the rubber and filler molecules is enhanced, so that the mixed emulsion is stabler and evener, and the comprehensive performance of the synthetic rubber is improved.

The invention discloses a method for mass production of pseudorabies virus vaccine, comprising the following steps: (a) adding netty polyester fiber which serves as a carrier into a bioreactor provided with a tide type micro-carrier suspension culture system and inoculating cells for producing vaccine; (b) inoculating pseudorabies virus vaccine when the culture cell grows to a certain intensity, so that the cells are infected by the pseudorabies virus vaccine; (c) reproducing the virus in great numbers under appropriate conditions; (d) harvesting the virus when cytopathic rate reaches above 70%; (e) carrying out freeze thawing on the harvested virus for once or twice to lead the cells to completely come off and disperse and then adding freeze-drying protective agent, evenly mixing the mixture, packaging the mixture in fixed volume and freeze-drying.The method of the invention has the advantages of good stability, explicit process control indicators, good controllability, easy operation, large process scale and the like.

The invention relates to a method for preparing cellulose polysaccharide degradable high water-absorbing agent from farm crop straws, belonging to the technical field of farm and side line products comprehensive utilization and agricultural chemicals. The invention relates to a method for using farm crop straws as main material to prepare high water-absorbing agent of cellulose polysaccharide, which comprises that refines cellulose substrate from farm crops straws and synthesizes water-absorbing agent. Taking corn straw as example, the invention refines cellulose and modifies functions, to obtain high water-absorbing agent functional material. The inventive high water-absorbing agent keeps original absorbing property of water-absorbing material, with simple production process, belonging to biological degradable product. The high water-absorbing agent has better water adsorption and retention properties, with wide application in drought resistance, desert greening, afforestation, food processing, and medical sanitation or the like, which can effectively develop cheap resources.

The invention belongs to the technical field of medicine, and relates to a preparation method of iron-protein succinylate with a high iron content. The preparation method comprises the following steps: (1) acylation: adding succinic anhydride into a casein solution to carry out reactions, continuously adding a sodium hydroxide solution into the reaction system to keep the pH value in a range of 6 to 9, after the reaction, adding acid into the reaction liquid to adjust the pH value to a range of 1 to 4, and filtering to obtain precipitate; (2) iron loading: dispersing the obtained precipitate into water, adding a proper amount of sodium hydroxide solution, stirring to dissolve the precipitate, then adding a ferric trichloride solution containing sodium bicarbonate into the obtained protein succinylate solution, adding a sodium hydroxide solution simultaneously to maintain the pH value of the reaction liquid in a range of 6 to 9, after the reaction filtering to remove the insoluble substances so as to obtain a iron-protein succinylate solution; refining the solution to remove the insoluble substance, adding acid to generate precipitate, filtering to obtain the precipitate, washing the precipitate by water, and finally drying the precipitate. In the recent literature, the reported iron content of iron-protein succinylate is in a range of 4.5 to 10%, while the iron content of iron-protein succinylate prepared by the provided method is as high as 15%. Moreover, the provided preparation method has the advantages of simple technology, good product solubility, and stable product quality.

The invention relates to a preparation method and application of 3-dimethylaminomethyl-3, 5, 5-trimethylcyclohexanol, and polyurethane foam prepared therefrom. The preparation method comprises: in the presence of a catalyst and acidic substance and under certain temperature and pressure, subjecting 3-aminomethyl-3, 5, 5-trimethylcyclohexanol, formaldehyde and hydrogen to aminomethylation reaction to obtain a reaction mixture containing an aqueous phase and an oil phase, separating the aqueous phase from the oil phase, wherein the oil phase mainly contains 3-dimethylaminomethyl-3, 5, 5-trimethylcyclohexanol, and the aqueous phase mainly contains formaldehyde; and optionally, purifying the oil phase so as to obtain 3-dimethylaminomethyl-3, 5, 5-trimethylcyclohexanol. The method provided by the invention realizes effective utilization of IPDA byproduct, and the polyurethane foam material prepared therefrom has the advantages of low smell, excellent physical performance and the like.

The invention discloses organic fertilizer derived from fermented cordyceps sinensis. The organic fertilizer is obtained according to the following preparation steps that (1) strains of a cordyceps sinensis bacterial genus or/and a cordyceps sinensis auxiliary bacterial genus are joined into a shake flask culture medium in a sterile mode to be cultivated; (2) a shake flask strain is joined into afirst-grade seed tank to be cultivated; (3) all strain materials in the first-grade seed tank are transferred to a second-grade seed tank to be cultivated, and the number of strains in the seed tank is amplified; (4) the strains are joined into a terminal fermentation tank in a sterile mode, and material supplementing is conducted; and (5) fermentation broth is subjected to solid-liquid separation. The problem of treatment of a large amount of the fermentation broth in the fermentation process of cordyceps sinensis type fermented mycelia is solved, the problem that the fermentation broth generated by related fermentation of conventional cordyceps sinensis cannot be directly applied to the organic fertilizer is solved, and the good organic fertilizer or organic fertilizer raw materials areobtained by direct production.

The invention discloses a natural rutile or zircon sand dry separation production method which sequentially comprises a first-stage electric separation, a second-stage electric separation, a third-stage electric separation, high-voltage arc plate electric separation and strong magnetic separation to obtain zircon sand concentrate or natural rutile concentrate. According to the invention, the production technology is simplified, the production efficiency is greatly improved, the labor strength is lowered, and uniform and stable product quality can be ensured.

The invention relates to a low-temperature expansion equipment and process for ginseng and red ginseng, which can be mainly used for deeply processing ginseng and red ginseng and can be also used for processing Chinese medicinal plants or foods of which the active ingredients and organization structures are similar to those of the ginseng and red ginseng. A constant-temperature electric heating layer is coated on the periphery of a container of the low-temperature expansion equipment used in the invention, and a swivel bearing with a stirrer is installed at the middle part of the low-temperature expansion equipment, thus, ginseng or red ginseng can be effectively expanded. The process provided by the invention comprises the following steps: raw material selecting, smashing, screening, low-temperature expanding, screening and packaging. By using the low-temperature expansion equipment and process for ginseng and red ginseng, the production rate is increased, the raw material loss caused by coking and high temperature is reduced, the energy consumption is reduced, and the active ingredients of red ginseng are more sufficiently utilized.

The invention provides a method for preparing a layered ceramic material MAX phase material. A transition metal source, a main group element source, a carbon source and/or a nitrogen source are mixedto form a solid raw material, the solid raw material itself in a reaction furnace is directly electrified to generate heat and gradually rises to above 900 DEG C, and carbonization and / or nitridation are conducted to form the MAX phase material. The method has the advantages of high thermal efficiency, low power consumption, good product consistency, stable process and large-scale production ofthe MAX phase material.

The invention discloses a cement grinding aid as well as a preparation method and an application method thereof. The cement grinding aid comprises the following raw materials in parts by weight: 5-15 parts of triethanolamine, 5-20 parts of honey, 1-5 parts of sodium gluconate, 1-5 parts of N-sulfo-glucosamine potassium salt, 5-10 parts of C1-C3 alcohol and 40-100 parts of water. The invention aims to provide the cement grinding aid that the grain composition of cement added with the cement grinding aid is reasonable after powdering, the fineness of cement is appropriately reduced, the strength of grinded cement can be improved, and the comprehensive effect is relatively good.