114results about How to "Not easy to produce precipitation" patented technology

The invention provides a cationic ethylene-vinyl acetate copolymer emulsion. The cationic ethylene-vinyl acetate copolymer emulsion is characterized by being prepared from a monomer, an initiating system and a composite emulsifying system as raw materials, wherein the monomer comprises 40 to 60 parts by mass of vinyl acetate, and 5 to 10 parts by mass of ethylene; the initiating system comprises 0.3 to 0.5 part by mass of oxidizing agent, and 0 to 0.3 part by mass of reducing agent; the composite emulsifying system comprises 1 to 2.5 parts by mass of cationic emulsifier, 2 to 5 parts by mass of non-ionic emulsifier, and 40 to 60 parts by mass of water. The copolymer emulsion is high in stability, difficultly produces precipitation, and shows outstanding adhering performance, water-retaining property and mechanical stability.

The invention discloses a separation method of alkaline liquid in production of alumina. The separation method is characterized in that sodium hydroxide and sodium metaaluminate in alkaline liquid can be separated by an electroosmosis device. According to the separation method disclosed by the invention, the alumina production process is optimized, i.e., the sodium hydroxide and sodium metaaluminate in the alkaline liquid are subjected to membrane separation before crystal seeds are introduced, therefore, the energy consumption and time in the subsequent crystal seed precipitation process can be reduced and shortened, and the productivity of aluminum hydroxide is increased; in addition, the purity of alkali in mother liquor can be improved and recycling of alkali is facilitated.

The invention discloses a gingko beverage and a preparation method thereof, belonging to the technical field of processing of food beverages, and providing a novel process for preparing a gingko beverage by using a modern biotechnology. According to the gingko beverage and the preparation method thereof, by adopting conventional processes of shelling, cooking for detoxicating, removing endopleura, colloid-milling, homogenizing and the like and a modern enzymolysis technology, or a preparation method further matched with an enzymolysis technology and a probiotic fermentation technology, on the basis of preserving organic nutrients and flavor of gingko, the problems of high viscosity and poor taste of the gingko beverage are solved; the prepared gingko beverage is cool and fine in taste, delicious in sour and sweetness, relatively excellent in palatability, and stable in tissues; nutritional ingredients are relatively preferably absorbed by a human body; meanwhile, the gingko beverage is rich in effective ingredients such as abundant ginkgetin and ginkgo terpene lactones, and has a relatively excellent health function.

The invention provides an efficient biogas slurry fertilizer and a preparation method thereof. The efficient biogas slurry fertilizer is prepared from, by mass, 32%-57% of biogas slurry, 10%-32% of ammonium nitrate phosphate, 5%-27% of urea, 9%-15% of potassium nitrate, 5%-7% of ammonium sulphate, 5%-13% of ammonium dihydrogen phosphate, 0.5%-2% of borax, 0.74%-3% of EDTA magnesium, 0.4%-1.5% of EDTA zinc, 0.4%-1.5% of EDTA manganese, 0.08%-0.15% of DA-6 and 5%-7% of potassium fulvate. The efficient biogas slurry fertilizer is prepared by utilizing fruit and vegetable waste anaerobic-fermentation substrate biogas slurry, healthy development of green agriculture is also achieved while the biogas slurry utilization way for solving the gradual output increase problem is provided, and the problems of environmental pollution, resource shortage and planting safety of big cities are solved. Compared with direct biogas slurry application, the biogas slurry fertilizer is more comprehensive in nutrition and higher in content, reaches the standards of NY1106-2010 humic acid-containing water-soluble fertilizers, different forms of nitrogen sources are combined, and nitrate nitrogen, ammonium nitrogen and amido-nitrogen in the nitrogen sources can be organically combined and blended according to different crops and different climates, so that the fertilizer efficiency is higher and longer, the utilization rate is higher, precipitation and crystallization are not likely to occur, and the stability and a usage effect are good.

The invention belongs to the technical field of nano materials, and in particular relates to carboxymethyl chitosan nanoparticles modified with glycyrrhizic acid, as well as a preparation method and application thereof. The nanoparticles disclosed by the invention are in a core-shell type; a hydrophobic polymer serves as a kernel packaged medicament; and carboxymethyl chitosan serves as a hydrophilic shell and is covalently linked with hepatic targeting ligand glycyrrhizic acid. The preparation method comprises the following steps of: firstly grating and copolymerizing carboxymethyl chitosan and hydrophobic monomers and self-assembling to form nanoparticles in the action of an initiator; secondly, oxidizing glycyrrhizic acid to obtain a glycyrrhizic acid aldehyde solution, mixing the glycyrrhizic acid aldehyde solution with the nanoparticles at a certain proportion and introducing targeting groups, and carrying out ultrasonic loading on the medicament. Compared with the prior art, the preparation method is simple and easy to control and has good repeatability and better stability and safety; and the targeting property and the tumor-inhabiting effect of the anti-tumor medicament can be strengthened remarkably. The nanoparticles serve as a targeting delivery vector for hydrophobic medicaments or molecular probes and can be used for treatment and diagnosis of liver diseases.

The invention discloses a spina date seed beverage, and a preparation method and an application thereof. The spina date seed beverage comprises the following raw material in part by weight: 0.1 to 0.5 parts of spina date seed, 0.1 to 0.5 parts of Indian bread, 0.2 to 0.6 parts of rhizome of king solomonseal, 0.3 to 0.8 parts of dried solomonseal and 0.05 to 0.25 parts of fruit of barbary wolf berry. The beverage is prepared by extracting active constituents of natural plants, has fresh and sweet taste and the effect of relieving uneasiness of body and mind, and belongs to cool plant beverage suitable for normal people and people suffering from insomnia and dreaminess.

The invention discloses and provides a leaf surface resistance and control agent for blocking heavy metal accumulation and a preparation method thereof. The leaf surface resistance and control agent is prepared from the following components in parts by weight: 1-3 parts of borax, 5-9 parts of nano silicon dioxide, 10-17 parts of carbon nano tubes, 5-8 parts of a surfactant, 18-31 parts of tea seedcake, 7-9 parts of dunaliella, 13-22 parts of flammulina velutipes fungus chaff, 3-5 parts of betel nut tree sawdust, 9-13 parts of a microbial agent, 3-4.5 parts of orange peel powder, 8-13 parts ofdistillers' grains, 7-10 parts of artemisia apiacea leaves, 25-43 parts of tea saponin, 1-3 parts of citric acid, 12-28 parts of amino acids, 6-11 parts of humic acid and 1000-1500 parts of deionizedwater. The leaf surface resistance and control agent prepared from the raw materials can prevent plants from absorbing heavy metals in air and soil and prevent the heavy metals from damaging the plants. Meanwhile, according to the preparation method of the leaf surface resistance and control agent for blocking heavy metal accumulation, effective components in the raw materials can be fully utilized, and the method is easy to operate and beneficial to industrial promotion.

The invention discloses narrow-hardenability high-temperature fine grain MnCr gear steel. The narrow-hardenability high-temperature fine grained MnCr gear steel comprises the following components in percentage by weight: 0.19%-0.21% of C, 1.25%-1.35% of Mn, 0.20-0.30% of Si, 1.20%-1.30% of Cr, less than or equal to 0.020% of P, 0.010%-0.025% of S, 0.013%-0.02% of N, 0.034-0.050% of Al, less than or equal to 0.0015% of [O], less than or equal to 0.0002% of [H], and the balance iron and inevitable impurity elements. The invention further discloses a preparation method for the gear steel. The gear steel has the advantages of low cost, high-temperature fine grains, high purity, narrow hardenability, stable performance, and can ensure that the hardenability bandwidth of the steel is narrow, quality of the rolled surface of the steel is good, and the grains are small.

The invention belongs to the field of surfactant synthetic chemistry. The first class s-triazine amphoteric betaine surfactant is characterized in that: the long alkyl carbon chains on a triazine ring are symmetrical, and the chemical name is N-(4,6-double fatty amino-1,3,5-s-triazine-2-radical)-N',N'-dimethyl-N'-carboxymethyl alkyl diamine amphoteric betaine surfactant. In addition, the invention further provides a synthesizing method of the amphoteric betaine surfactant, which takes cyanuric chloride, fatty amine, N,N-dimethyl alkyl diamine and sodium chloroacetate as main raw materials forpreparation, and the amphoteric betaine surfactant is prepared through three steps. In the N-(4,6-double fatty amino-1,3,5-s-triazine-2-radical)-N',N'-dimethyl-N'-carboxymethyl alkyl diamine amphoteric betaine surfactant of the invention, compared with the sulfonate surfactant, the carboxylate amphoteric betaine surfactant has good tenderness, is not easy to settle, can be used with different surfactants in media of various pH, and has great superiority.

The invention relates to a grain and fruit compounding beverage and a preparation method thereof. The beverage comprises, by weight, 20-30% of Chinese date juice, 10-25% of hawthorn juice, 10-25% of mung bean emulsion, 10-30% of glutinous rice fermentation juice and 0.2-0.5% of a stabilizer. The preparation steps include (1) preparing the mung bean emulsion, the glutinous rice fermentation juice, the Chinese data juice and the hawthorn juice beverages; (2) evenly mixing the raw material juice and adding accessories for even mixing; and (3) homogenizing, filling and sterilizing to obtain the grain and fruit compounding beverage. The beverage has the advantages of healthcare such as air supply, greening blood, enhancing immunity of the organism, invigorating the stomach and digestion, dredging toxin in the human body, checking the diarrhea, strengthening the spleen and reducing the blood fat; and additionally, the beverage is thick, tasty and refreshing, delamination-free, not easy to generate sedimentation and easy to absorb.

The invention relates to an antistatic compound and an antistatic film containing the same. The compound comprises the components in parts by weight: 80 to 120 parts of nanometer metal oxide polyester latice, 5 to 20 parts of polyurethane-acrylate composite latice, 200 to 600 parts of solvent, 0 to 50 parts of booster solvent and 0.1 to 3 parts of surfactant. The compound disclosed by the invention has the advantages of stable system performance and uniform coating; and the antistatic film containing the compound has the advantages of stable antistatic performance, fine adhesion and high transparency, and can meet the requirements on the field of optical flat panel display.

The invention provides an organic adhesive composite used for silicon solar cell silver paste, comprising the following raw materials according to parts by weight: 5-13% of polyamide resin, 8-25% of abietic resin or phenolic aldehyde modified terpene resin, 65-80% of organic solvent and 0-1% of wetting dispersant. The organic adhesive composite exists in silver paste to serve as a carrier or dispersion medium, proper fluid performance is endowed to slurry to fully wet silver powder or inorganic adhesive powder in the wetting silver paste, and the slurry can be dissolved with other accessory ingredients in a mixed mode.

The invention relates to the field of lithium battery manufacturing, and particularly provides a lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing. The lithium battery electrode slurry stirring processing method comprises the following steps of (a) performing premixing: mixing a solvent and a bonder uniformly to obtain a first mixture, and mixing active substances and a conductive agent uniformly to obtain a second mixture; (b) performing primary stirring: mixing and stirring part of the first mixture and all of the second mixture to obtain a third mixture; (c) performing secondary stirring: mixing and stirring the rest of the first mixture and all of the third mixture; (d) performing third mixing; (e) performing fourthstirring; (f) performing fifth stirring; and circulating the steps (d)-(f). According to the processing method, the uniformity and stability of the electrode slurry in lithium battery production can be remarkably improved, and the uniformity of the next coating process can be improved, so that the controllability of the lithium ion battery production process and the consistency of product performance are improved.

The invention discloses a calcium carbonate particle composition. The calcium carbonate particle composition is prepared from the following components in parts by weight: 100 parts of calcium carbonate, 3000-4500 parts of powdered sugar, and 120-180 parts of an acid source. The invention further discloses a preparation method of the calcium carbonate particle composition. The preparation method comprises the following steps: weighing calcium carbonate, powdered sugar and the acid source according to the weight parts, taking the powdered sugar, adding purified water into the powdered sugar for preparing the syrup, mixing calcium carbonate and part of the powdered sugar, adding with the syrup, preparing a soft material, carrying out wet granulation, carrying out drying, and carrying out size stabilization, thus obtaining calcium carbonate particles; dissolving the acid source by adopting purified water, after dissolving, adding with the rest powdered sugar, preparing a soft material, carrying out wet granulation, carrying out drying, and carrying out size stabilization, thus obtaining acid particles; and uniformly mixing the calcium carbonate particles and the acid particles. The pH value of the calcium carbonate particle composition prepared by adopting the method provided by the invention is 4.5-6.5, the dissolubility is good, precipitate is seldom generated, the stability is good after the calcium carbonate particle composition is placed for a long term, the problem that the gastrointestinal tract is uncomfortable and can not realize well absorption due to hyperacidity is solved, in addition, the process is simple, the operability is good, and the industrial production as well as popularization and application can be easily realized.

The invention provides a sarranine and methyl violet mixed staining method for resin slices and a staining solution thereof. The method comprises the following steps: (1) preparing a staining solution, namely preparing 0.5 mass percent of sarranine solution and 1 mass percent of methyl violet solution; and (2) respectively mixing the 0.5 mass percent of sarranine solution and the 1 mass percent of methyl violet solution according to multiple volume ratios, staining resin semithin sections, and observing the microscopic structure under a light microscope. According to the method disclosed by the invention, different histological stain requirements can be met aiming at the toluidine blue-O staining defect, and the method has the advantages of low cost and simplicity in preservation.

The invention relates to a silicon-containing high-temperature-resistant insulating coating and a preparation method thereof. The silicon-containing high-temperature-resistant insulating coating comprises or consists of the following components: a phosphate solution, silicon oxide, aluminium oxide, zinc oxide, silica sol, a diluent and optional boric acid. The method comprises the following steps:preparing the phosphate solution heating a phosphoric acid solution and metal hydroxide to a boiling state, maintaining till a reaction system becomes transparent, and then cooling to room temperature, and ageing for 12 hours or longer; and preparing the silicon-containing high-temperature-resistant insulating coating: adding the phosphate solution, the silicon oxide, the aluminium oxide, the zinc oxide, the silica sol, the diluent and the optional boric acid, uniformly stirring and then performing ball-milling to obtain the silicon-containing high-temperature-resistant insulating coating. The invention further provides application of the coating in preparation of a high-temperature-resistant and / or insulating coating layer. The coating disclosed by the invention has excellent propertiesof high-temperature resistance, insulativity, adhesiveness and the like.

The invention relates to the field of pollen processing and discloses a pollen beverage and a preparation method thereof. The pollen beverage provided by the invention comprises the following components in percentage by mass: 25-35% of bee pollen powder, 25-35% of puffed rice powder, 15-25% of fruit powder and 15-25% of cane sugar. The preparation method in the invention comprises the following steps: evenly mixing 25-35wt% of the bee pollen powder with 25-35wt% of the puffed rice powder at the temperature of lower than 25 DEG C and the relative humidity of lower than 30%; and then adding 15-25wt% of the fruit powder and 15-25wt% of the cane sugar, and evenly mixing, thus obtaining the pollen beverage. The pollen beverage provided by the invention has the advantages of low possibility of settling, no caking, capability of forming uniform emulsus liquid, no bitter taste of the pollen and convenience in brewing, thus the pollen beverage can be easily accepted by patients.

The invention relates to a high-efficiency coal water slurry stabilizer which is prepared from the following raw materials in parts by weight: 8-14 parts of sodium ethylene diamine tetracetate, 3-6 parts of hydroxyethyl cellulose, 1-2 parts of polyepoxysuccinic acid, 1.5-2.2 parts of hydroxymethyl cellulose, 2-4 parts of air entraining agent, 3-8 parts of water reducing agent, 10-14 parts of smellless kerosene, 8-12 parts of di-n-octyl tin oxide, 2-4 parts of sodium polyacrylate, 8-13 parts of guar gum, 3-6 parts of high molecular surfactant, 2-4 parts of cellulase and 3-5 parts of arabic gum. The high-efficiency coal water slurry stabilizer can increase the viscosity of the coal water slurry, enhances the stability of the slurry, has the advantages of favorable effect, wide raw material sources for preparing the suspension stabilizer and low tendency to precipitation, and reduces the resistance between coal granules.

The invention discloses a sparassis crispa solid beverage prepared by taking a sparassis crispa fungus medium as a raw material and a preparation method of the sparassis crispa solid beverage. The sparassis crispa solid beverage is prepared from 1,000 parts of the sparassis crispa fungus medium, 650-700 parts of water, 30-40 parts of a freeze-drying auxiliary, 20-30 parts of a filling agent, 0.5-1 part of a thickening agent, 0-40 parts of a flavor improver, 55-65 parts of a sweetening agent and 1-1.5 parts of a sour agent; the sparassis crispa fungus medium, the freeze-drying auxiliary, the water and the sour agent are mixed to be uniform, and raw material powder A is obtained through colloid mill slurrying, high-pressure homogenizing and freeze-drying; the sweetening agent, the flavor improver, the filling agent and the thickening agent are mixed to be uniform, smashing and sieving are conducted, and raw material powder B is obtained; the raw material powder A and the raw material powder B are mixed to be uniform and then granulated, and the sparassis crispa solid beverage is obtained. The sparassis crispa solid beverage is sour and sweet and fine and smooth in mouthfeel, the making solubility, reconstitution property and uniformity of the solid beverage are all better than a product prepared from common dry powder, and layering and precipitating are not prone to generate.

The invention relates to a fuel coal additive composition which comprises 20 to 75 weight percent of a sodium silicate water soluble solvent, 10 to 40 weight percent of one or the mixture of sodium hydroxide and potassium hydroxide, 0.01 to 7 weight percent of hydrogen peroxide, 1 to 15 weight percent of borax, 1 to 25 parts of one or the mixture of glucose and sodium citrate, and 0.01 to 10 weight percent of glycerol. The fuel coal additive composition has the advantages that the combustion rate of natural fire coal can be improved; environmental pollution is reduced; slag can be removed; the maintenance cost is reduced; the service life of a combustion device is prolonged. Moreover, the fuel coal additive composition is high in cold resistance, and low in possibility of precipitation. In addition, since the fuel coal additive composition can be concentrated for use, the treating and transporting are very simple.

The invention discloses a method for brewing yellow wine by malt syrup and obtained yellow wine. The method comprises the following steps of: falling raw materials into a tank: putting 10 parts by weight of malt syrup, 14-16 parts by weight of water, 0.95-1.5 parts by weight of yeast wine, 0.9-1.1 parts by weight of wheat koji and a proper quantity of acid proteinase into a fermentation tank, and beginning to ferment after the raw materials are evenly mixed; and fermentation: in a fermentation process, stirring once in every day, controlling the fermentation temperature to be 24-30DEG C, and controlling a fermentation period to be 7-20 days; and squeezing, clarifying and decocting wine. The yellow wine product obtained by brewing conforms to the national standard, the style of strong bitterness of the traditional yellow wine is improved, protein-class precipitates are unlikely to generate, and the product property is more stable. With the method disclosed by the invention, the environment pressure is lightened, and the energy consumption is greatly lowered.

The invention discloses a diesel engine exhaust gas cleaning and energy-saving agent comprising the following raw materials in parts by weight: methanol, ethylene glycol monomethyl ether, polybasic crude alcohol, 5-7 parts of sodium dodecanol sulfate, a carbon deposit scavenger, a desulfurization catalyst, a diesel catalyst, ethyl alcohol ether amine, a diesel power accelerator, decanoic acid glyceride, glycerol palm kernel fatty acid ester, and an ester pour point reducer. The carbon deposit scavenger is composed of a raw oil pour point reducer, an overbased synthetic calcium sulfonate detergent, a viscosity index improver, naphthenic acid and base oil; the diesel power accelerator is composed of isooctanol, aminoacetaldehyde diethyl acetal, n-propanol, zinc naphthenate and pentamethyldiethylene triamine; the ester type pour point reducer is composed of a poly alpha-olefin type pour point reducer and a fumarate type pour point reducer. The invention reduces the emission amount of pollution gas, prolongs the service life of the engine, protects the combustion and fuel injection system of the vehicle, reduces the maintenance cost of the user, has low production cost, and has a widesource of raw materials.

The invention discloses a chemical material mixing device, which at least comprises motors, a connecting rod, stirring shafts, a belt pulley, bearings, gears, a stirring vane, a stirring cylinder, a valve, a cylinder and a supporting frame; a main motor and an auxiliary motor are arranged on a support table, a belt wheel on a rotation shaft is connected with the belt pulley by a conveyor belt; the main stirring shaft top end is successively inserted into a second bearing, the belt pulley and a first bearing, the main stirring shaft bottom end is inserted into the stirring cylinder, the first gear and the second gear are respectively fixed on a main stirring shaft and a vice stirring shaft, and the middles of the two gears are engaged; the upper end of the vice stirring shaft is connected with a third bearing arranged on the stirring cylinder, the main stirring shaft and the vice stirring shaft are provided with the first gear and the second gear, the number of teeth of external gearing and the modulus of the first gear and the second gear are equal, the two stirring shafts achieves the same speed reverse rotation, mixing efficiency is high, and precipitation of a material to be mixed is not easy to produce.

In a field of the mixing and degassing equipment in a rotation and revolution form, a container and the mixing and degassing equipment for improving the mixing and degassing performance is provided. The container 100 is held on a container support 30 and performs mixing and degassing treatment to a material M inside in the rotation and revolution form. The inner surface 110 of the container includes a cylindric lateral face part 120 and a bottom part 130 extending from the lower end of the lateral face part. The bottom part includes a central area 140, a deepest area 150, a first inclination area 160 connecting the deepest area and the lateral face part and a second inclination area 170 connecting the deepest area and the central area. The first and second inclination areas are configured to a curve extending along a circle C1 in a sectional plane which is split of a plane including a central line 120L of the lateral face part.

The invention discloses a suspending agent aid suitable for compounding glufosinate-ammonium with flumioxazin. The suspending agent aid comprises the following components in percentage by mass: 1%-30% of styrylphenol polyoxyethylene ether phosphate, 1%-40% of a polycarboxylate dispersant, 1%-20% of dodecyl dimethyl betaine, 1%-10% of iso-tridecanol polyoxyethylene ether and the balance of water. The auxiliary agent has the advantages of excellent wettability and dispersity, small dosage, low cost and stable dispersing performance. The risks of particle aggregation, particle size increase and the like can be reduced, the stability of the suspending agent is greatly improved, and the problems of layering, precipitation and paste formation are avoided.

The invention discloses a special AB water-soluble fertilizer for soilless culture of fruit vegetables. The AB water-soluble fertilizer comprises a fertilizer A and a fertilizer B. The fertilizer A comprises the following components in parts by weight: calcium ammonium nitrate, calcium chloride, potassium nitrate and sodium hydrogen ferric DTPA. The fertilizer B is prepared from the following components in parts by weight: potassium nitrate, magnesium sulfate heptahydrate, monopotassium phosphate, ammonium dihydrogen phosphate, potassium sulfate, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate, boric acid and an auxiliary agent. According to the special AB water-soluble fertilizer for soilless culture of the fruit vegetables, a high-efficiency calcium source is used as a basis, a proper amount of fertilizer A containing potassium, chelated trace elements such as iron and the like is added, and hot-process phosphoric acid is used as a basis, and a proper amount of phosphate, potassium magnesium and other inorganic and chelated trace elements are added, so that precipitation reaction can be effectively prevented; and comprehensive and balanced nutrition is provided for growth and development of crops, the utilization rate of the fertilizer is increased, hardening is not likely to happen in the storage period, and therefore the nutrient solution is more suitable for soilless culture.

The invention relates to a high-temperature-resistant insulation coating and a preparation method thereof. The high-temperature-resistant insulation coating comprises or consists of the following components: a phosphate solution, spherical powder, a diluent and optional boric acid. The method comprises the following steps: the preparation of the phosphate solution heating a phosphoric acid solution and metal hydroxide to a boiling state and keeping till a reaction system becomes transparent, then cooling to room temperature and aging for 12 hours; and the preparation of the high-temperature-resistant insulation coating: adding the spherical powder, the diluent and the optional boric acid, uniformly stirring and then performing ball milling. According to the coating involved in the invention, a stable coating layer is formed under curing action of 100-130 DEG C; the usage temperature of the high-temperature-resistant insulation coating reaches up to 1000 DEG; the high-temperature-resistant insulation coating can be applied to the surface of a conductor so as to play the role of insulation and corrosion protection; the composition of the coating is stable in property; and the high-temperature-resistant insulation coating can be placed for a long time after being prepared.

The invention provides a high-temperature-oxidation-resistant coating for an electronic product and a preparation method thereof. The coating comprises the following components in parts by mass: 50-68 parts of nano titanium dioxide, 8-20 parts of aluminum oxide, 3-7 parts of sodium nitrite, 1.2-3 parts of magnesium oxide, 5-10 parts of feldspar powder, 5-10.5 parts of calcined high aluminum powder, 0.6-1.5 parts of ferrous oxide, 3-7 parts of ceramic micro powder, 0.1-0.23 part of spinel, 2-5 parts of liquid sodium silicate, 1-3 parts of water and 5-12 parts of a coating antistatic agent. The coating provided by the invention is fine in particles, does not precipitate easily, is high in high-temperature resistance and hardness, can be used for well protecting metal, and has antirust and antistatic performance.