15 results about "Calcium oxide" patented technology

The invention discloses a composite high-magnesia flux for sintering, which is prepared by compounding two fluxes containing magnesium, namely magnesium limestone powder and serpentine according to certain weight proportion, wherein the mixture ratio of the magnesium limestone powder in a sintered mixture is between 1 and 2.5 percent, the mixture ratio of the serpentine in the sintered mixture is between 0.5 and 2 percent, and the proportion between the magnesium limestone powder and the serpentine can be properly adjusted within the mixture ratio range according to conditions of sintered raw materials and concrete requirements of an iron-making blast furnace on the MgO content in sintered ore. The flux radically avoids the negative effect on the iron-making blast furnace caused by lower MgO content in imported fine ore; the flux eliminates the disadvantageous situation of constituent fluctuation of the sintered ore caused by adding a MgO flux during the sintering, and realizes the dual aims of improving the quality of the sintered ore and reducing the cost for the flux; and the flux greatly reduces the using amount of calcium oxide, makes white spot phenomenon in the mixture basically disappear, apparently lightens the phenomena of sticking and blocking of a mixing machine and a storage hopper, and has steadier and smoother sintering process.

The invention belongs to the field of calcium oxide production, and concretely relates to a production raw material for preparing calcium oxide by using calcium carbide furnace gas purified ash and apreparation process thereof. The production raw material comprises calcium carbide furnace gas purified ash, calcium carbide furnace gas, coal dust, limestone and combustion air; According to the calorific values of coal dust and calcium carbide furnace gas, the weight is metered according to proportion, then the materials are separately fed into a rotary kiln nozzle in parallel through the pneumatic conveying pipelines, and the materials are injected into a rotary kiln for high temperature combustion, While heating the limestone raw material in the rotary kiln, the CaO powder in the calcium carbide furnace gas and CaO powder oxidized by CaC are sintered to lime particles, the lime particles and a calcium oxide lump material calcined by limestone are mixed, and the calcium oxide product isused as a raw material for a calcium carbide furnace device, and the impurity dust is recycled. The calcium carbide furnace gas purified ash is used as the raw material for the production of calciumoxide, and the whole process reaches clean production, saves energy, reduces costs, and improves economic benefits of the enterprise.

The invention discloses tire inner liner rubber and a preparation method thereof. The inner tire liner rubber comprises 70-90 parts of brominated butyl rubber, 10-15 parts of natural rubber, 5-10 parts of silane-terminated polyether resin, 50-70 parts of carbon black, 3-6 parts of diatomite, 2-4 parts of calcium oxide, 2-4 parts of zinc borate, 1-3 parts of stearic acid, 3-6 parts of naphthenic oil, 3-6 parts of aromatic hydrocarbon oil, 2-5 parts of anti-aging agent, 1-2 parts of accelerant and 0.2-0.8 part of insoluble sulfur, wherein the main chain of the silane-terminated polyether resin is polypropylene oxide, and dimethoxy methyl silane or trimethoxy silane are used for terminating; the natural rubber is SMR20 or SMR10; the accelerant is accelerant DM or accelerant DPG; the anti-aging agent is anti-aging 4020, anti-aging agent RD or anti-aging agent 3100. The tire inner liner rubber and the preparation method thereof have the advantages that the silane-terminated polyether resin is added into the tire inner liner rubber; by the preparation method, the problem that the carbon black and small materials are uneven in dispersion can be solved, the service life of the tire inner liner rubber is prolonged, and the safety performance of the tire inner liner rubber is increased.

The invention provides a method for treating and utilizing waste water generated by producing saponin by yellow ginger. The method comprises the following steps that: mother liquid wastewater is filtered after the yellow ginger is subjected to acidolysis; the mother liquid wastewater is neutralized to neutrality with pH value of between 4.5 and 5 by calcium oxide; after precipitating, a supernatant is infiltrated into the solution for fermenting, and composite yeast and a nitrogen-contained compound are simultaneously added into the solution to ferment for 3 days at a temperature of between 32 and 38 DEG C; after fermentation is completed, the mother liquid wastewater which is treated by the processes is infiltrated to an alcohol tower for distilling; after alcohol is distilled out, the content of COD in residual wastewater in the tower is about 1,000; and after the residual wastewater is filtered through a polymer film to filter out yeast, calcium substances and other organic substances in the wastewater, the residual mother liquid wastewater is purified water, so discharge standard without pollution is met.

The invention discloses a large-plate-blank carbon-free and silicon-free baking-free long water gap, which consists of a long water gap substrate and an inner liner, wherein the long water gap substrate consists of a zirconium carbon outer layer and an aluminum carbon inner layer, the zirconium carbon outer layer consists of following substances in parts by weight: 70 to 80 parts of zirconium, 12 to 14 parts of C (carbon) and 2 to 4 parts of CaO (calcium oxide), the aluminum carbon inner layer consists of the following substances in parts by weight: 60 to 80 parts of Al2O3 (aluminum oxide) and 10 to 30 parts of C, and the inner liner consists of the following ingredients in parts by weight: 74 to 76 parts of aluminum magnesium spinel, 14 to 16 parts of anti-explosion fiber and 8 to 10 parts of phenolic resin. Through the use of the baking-free long water gap for large-plate-blank continuous casing low-carbon and low-silicon steel, impurity pollution and steel blank carbon increase and silicon increase phenomena caused by secondary oxidization of large-ladle molten steel and molten steel sputtering can be prevented, the continuous casting efficiency can be continuously improved, the continuous casting blank quality is ensured, and more economic benefits are created for enterprises.

The invention belongs to the field of wastewater treatment, and discloses a method for removing As (III) in wastewater by enhanced coagulation, which mainly comprises the following steps: (1) adding acertain amount of calcium peroxide into As (III) containing wastewater, and stirring; and (2) adding an inorganic coagulant to carry out coagulation treatment. According to the method, in the treatment process, on one hand, calcium peroxide plays a role of an oxidizing agent; As (III) is converted into As (V), and on the other hand, the pH environment in the water body solution is improved by utilizing slow hydrolysis of calcium peroxide in the water body solution, so that the pH in the coagulating sedimentation process is maintained at a slightly alkaline level beneficial to coagulating sedimentation, the coagulating efficiency is improved, and meanwhile, the efficient coagulating efficiency and oxidation efficiency are realized. The method is simple to operate and low in cost, does notneed additional equipment investment, and can be widely applied to advanced treatment of arsenic-containing industrial wastewater and treatment of arsenic-polluted underground water or drinking water.

The invention provides a formula of a thermal insulation board special for a refrigeration house. The formula comprises polystyrene foam particles, dispersible latex powder, natural latex, a flame retardant, a foaming agent, a foam stabilizer, nano silicon dioxide, calcium hydroxide, a plasticizer, mica powder, a film-forming agent and color masterbatch. The formula is prepared from the followingraw materials in parts by weight: 1000kg of the polystyrene foam particles, 8-12 kg of the dispersible latex powder, 8-12 kg of the natural latex, 18-22 kg of the flame retardant, 6-8 kg of the foaming agent, 16-20 kg of the foam stabilizer, 10-22 kg of the nano silicon dioxide, 20 kg of the calcium hydroxide, 4-6 kg of the plasticizer, 45-55 kg of the mica powder, 60-70 kg of the film-forming agent and 3 kg of the color masterbatch. The nano silicon dioxide is added in the foaming process, so that the micropore amount is increased, foam holes are closely formed in the surface, the heat conductivity coefficient is reduced, and the fireproof function of the insulation board is improved.

The present invention provides a kind of composite immobilized enzyme material for repairing polluted water source and its preparation process. The composite immobilized enzyme material is prepared with inorganic carrier 60-70 wt%, fly ash 8-20 wt%, enzyme preparation 3-15 wt%, calcium oxide expander 0.5-0.7 wt%, Portland cement 8-20 wt%, and additive 0.5-2 wt%, and through weighing material, crushing, mixing, stilling to nitrify, pressing to form and drying. The present invention has simple production process, low cost and high water treating effect, and the composite immobilized enzyme material may be used in treating sewage and waste water widely.

Provided are: a chemical heat storage material having excellent repeated durability; and a method for producing the same. This chemical heat storage material is characterized by comprising: a surfacelayer formed from silica and/or calcium silicate; and calcium oxide particles having the surface layer.

The invention discloses a cable with an insect bite prevention effect. The cable comprises the following components in parts by weight: 20-30 parts of titanium dioxide, 10-20 parts of paraffin, 30-40parts of polyurethane resin, 15-25 parts of magnesium oxide, 20-30 parts of calcium oxide, 20-30 parts of phthalate and 15-25 parts of a silane coupling agent. The paraffin and the polyurethane resinhave a fireproof effect and are matched with the titanium dioxide, the magnesium oxide and the calcium oxide for use, so that the insulating property is achieved, the fireproof effect is achieved, andmeanwhile, the phthalate and the silane coupling agent are arranged, so that the insect prevention effect is achieved.