Heating and insulating riser bush

The invention discloses a heating and insulating riser bush which comprises, by weight, 36-40 percent of hollow microsphere, 4-6 percent of silica powder, 4-6 percent of magnesia, 18-20 percent of aluminum powder, 8-10 percent of ferric oxide, 9-15 percent of graphite powder, 2-4 percent of niter, 2-3 percent of potassium permanganate, 2-4 percent of potassium chloride and 4-6 percent of borax, and proper adhesives and water are additionally added to prepare the heating and insulating riser bush. The heating and insulating riser bush solves the problems that an existing riser is insufficient in strength, poor in heat insulation and insufficient in heating, the optimal riser ignition time can be generated, the riser ignition temperature is lowered, the solidification time of metal liquid in the riser is prolonged, the heating effect and the insulating effect of the riser are obviously improved, the requirement for feeding of a casting is met, and therefore the yield of steel casting products ...

Olivine-type lithium manganese iron phosphate as well as preparation method and application thereof

The invention discloses olivine-type lithium manganese iron phosphate and a preparation method and application thereof, the preparation method comprises the following steps: S1, dissolving lithium nitrate, ferric nitrate, manganese nitrate, ammonium dihydrogen phosphate and an organic matter in deionized water to obtain a mixed solution A; s2, stirring the mixed solution A for T1 time under a constant temperature condition to obtain a mixed solution B; s3, heating and evaporating the mixed solution B, and carrying out combustion reaction on jelly after evaporation to obtain a brownish black fluffy precursor; and S4, grinding the precursor, annealing in a protective gas atmosphere, and cooling to obtain the olivine-type lithium iron manganese phosphate. The olivine type lithium iron manganese phosphate can be prepared, the preparation method is simple in operation, low in temperature and simple in material use, the whole preparation process of the material is short in time consumption, high ...

All-vanadium redox flow battery electrolytic solution preparation method

The invention relates to a method for preparing electrolyte for a flow battery with full vanadium oxidation reduction, which is characterized by the processes: mixing the three oxidation vanadium and the sulphuric acid with a specified volume of proportion of 1. 84, then calcining the mixture under 100 DEG C to 300DEG C in a pipe type electric stove to get vanadium compound in green color, at last dissolving the calcined product into the dilute sulfuric acid to get the vanadium electrolyte used in a vanadium battery in which 4 valence vanadium and 3 valence vanadium take 50 per cent of the total vanadium quantity. The electrolyte for a flow battery with whole vanadium oxidation reduction prepared by the method reduces the emission of SO2, simplifies the preparation work procedure and is beneficial for scale production and environment protection of the flow battery with full vanadium oxidation reduction.

Method for preparing electrolyte for all-vanadium redox flow battery

The invention provides a method for preparing electrolyte for an all-vanadium redox flow battery, which comprises the following steps of: uniformly mixing vanadium trioxide with vanadium pentoxide according to the weight ratio of 6-9:1, adding the mixture into a certain amount of concentrated sulfuric acid, arranging the mixed solution into a tube furnace, performing calcination at 100 to 250 DEG C, and dissolving a calcination product into 2 to 5 mol/L sulfuric acid solution to obtain the electrolyte for the vanadium battery, wherein each of trivalent vanadium and tetravalent vanadium accounts for 50 percent of the concentration of the total vanadium. The method for preparing the electrolyte is simple, and solves the problems of wasting of resources and secondary pollutions.

Biological desiliconization method of vanadium titano-magnetite

The invention belongs to the field of ore extraction, relates to a method for enriching iron and titanium valuable elements by biologically desiliconizing the vanadium titano-magnetite, and specifically relates to a process for culturing silicate bacteria and treating minerals. In order to realize biological desiliconization of the vanadium titano-magnetite, the inventor of the invention obtains the silicate bacteria from a commercial institution; the silicate bacteria are cultured in an Alexander-rove culture medium which is doped with the vanadium titano-magnetite powder; then the cultured silicate bacteria are more advantageous for removing silicon in the vanadium titano-magnetite. The method comprises the following steps: A, culturing the silicate bacteria; B, crushing the vanadium titano-magnetite until the vanadium titano-magnetite is capable of passing through a sieve in the range from 40 to 400 meshes; and C, carrying out biological desiliconization. The silicate bacteria has an ...

All-vanadium redox flow battery electrolytic solution preparation method

Metal lithium battery electrolyte additive and electrolyte thereof

The invention provides a metal lithium battery electrolyte additive and an electrolyte thereof. The lithium battery electrolyte additive has a specific chemical structure, unsaturated C = C double bonds initiate a polymerization reaction, a compact polymer solid electrolyte interface film (SEI film) is formed on the surface of metal lithium, side reaction of the metal lithium and an electrolyte is isolated, the SEI film generated on the surface of the metal lithium is rich in LiF due to the F element, and growth of lithium dendrites is inhibited.

Method for preparing dye-sensitized solar cell vanadium-doped composite electrode

The invention discloses a method for preparing a dye-sensitized solar cell vanadium-doped composite electrode. The method comprises the first step of mixing nanometer TiO2 particles and vanadium oxide in absolute ethyl alcohol to prepare a composite sizing agent, the second step of evenly coating FTO conducting glass with the composite sizing agent, increasing the temperature to 400-500 DEG C to carry out sintering and reducing the temperature after sintering to obtain a V2O5-TiO2 composite thin film electrode, the third step of immersing the electrode into the ammonium metavanadate water solution, carrying out drying, increasing the temperature to 400-500 DEG C to be sintered, and reducing the temperature after sintering to obtain a secondary doped V2O5-TiO2 composite thin film electrode, and the fourth step of reducing the temperature to 75-85 DEG C, immersing the secondary doped V2O5-TiO2 composite thin film electrode into the N719 dye absolute ethyl alcohol solution, carrying out wetting ...