38results about How to "Increase the oxidizing atmosphere" patented technology

The invention provides a glass raw material composition. The glass raw material composition comprises, by weight, 35 to 60 parts of Bi2O3, 10 to 30 parts of B2O3, 10 to 20 parts of SiO2, 1 to 5 parts of CaO, 0.5 to 5 parts of MgO, 0 to 5 parts of Al2O3, 3 to 8 parts of Sb2O3 and Sb2O5, and a nitrate of which the content is 0.5 to 1.5 times the content of Sb2O3, wherein the nitrate is magnesium nitrate or calcium nitrate. The invention also provides inorganic glass powder prepared from the glass raw material composition, crystalline silicon solar battery aluminum conductive paste prepared from the inorganic glass powder, and a preparation method of the crystalline silicon solar battery aluminum conductive paste. The clear inorganic glass powder can be prepared from the glass raw material composition and thus a battery piece prepared from the crystalline silicon solar battery aluminum conductive paste containing the inorganic glass powder has high photoelectric conversion efficiency and high water boiling resistance.

The invention discloses a dephosphorization control method for unequal samples at converter smelting end point of DC04 steel, and belongs to the technical field of converter steelmaking. The method comprises the following steps that on the basis of the optimal slag remaining amount and the slag alkalinity, the molten steel temperature obtained through sublance TSC measurement is t DEG C, the carbon content in molten steel is c%, when t + c * 100-1650 is smaller than or equal to 0, sintering ore is not added in the follow-up auxiliary blowing process, and when t + c * 100-1650 is larger than 0, a certain amount of sintering ore is added in the follow-up auxiliary blowing process; and during sublance TSO measurement, the measured molten steel temperature meets the tapping requirement, and when the measured end point oxygen content of molten steel is larger than or equal to X / 0.0315-55, unequal samples are obtained, wherein X is the average carbon oxygen deposit of first 3 furnaces. When X is smaller than 13, X is 13, when X is larger than 16, X is 16, and when X is larger than or equal to 13 and smaller than or equal to 16, X is the original value. In order to solve the problems in the prior art, it is necessary to research the dephosphorization control method for unequal samples at the converter smelting end point of the DC04 steel, the phosphorus content at the end point of molten steel can be effectively controlled, the qualification rate of the phosphorus content of the molten steel is guaranteed, and tapping can be achieved through unequal samples.

The invention discloses a sintering process of iron ore powder pellets, which fully utilizes the heat storage effect of a material layer and the characteristics that the upper temperature of the material layer is low and the lower temperature of the material layer is high in the sintering process, and adopts a three-layer material distribution mode to ensure the uniformity of the temperature of the material layer, so that the fuel at the lower part of the material layer is less, the fuel at the middle part is higher and the fuel at the upper part is more; the temperature of the whole material layer is uniform. Through layered material distribution, material layer fuel is regulated and controlled to be matched with the temperature, so that the consolidation effect of sintered ore is improved, and solid energy consumption is reduced. The hydrophilic performance of the raw materials is improved through a raw material pretreatment process, and then the air permeability of the raw materials is improved through a pelletizing process; and in the sintering link, the moisture of the sintered material is reduced through the drying process, the phenomenon that the moisture is too high in the sintering process is avoided, and the thermal-state air permeability in the sintering process is improved. The dynamic conditions of mass transfer and heat transfer in the sintering process are improved, the oxidizing atmosphere in the sintering process is improved, reasonable blending of solid-phase consolidation and liquid-phase consolidation of pellet sintering is promoted, and the strength of sintered ore is improved.

The invention discloses nitrate-free environment-friendly steel plate enamel titanium lake blue cover glaze and a preparation method thereof, and the nitrate-free environment-friendly steel plate enamel titanium lake blue cover glaze comprises the following components in parts by mass: 22-25 parts of quartz, 28-30 parts of borax anhydrous, 11-14 parts of titanium dioxide, 9-11 parts of potassium feldspar, 0.7-1 part of magnesium carbonate, 1-2 parts of sodium carbonate, 7-9 parts of sodium fluosilicate and 1-2 parts of calcium carbonate. And 1.5-2.5 parts by mass of copper oxide. The raw materials are uniformly mixed according to the proportion and are molten under the condition of pure oxygen at 1260 + / -10 DEG C, and the firing temperature of the finished product is 800-830 DEG C. The titanium lake blue cover glaze does not contain nitrate, and the major technical problem that the environment is polluted due to emission of nitric oxide gas generated in the production process of existing steel plate enamel titanium lake blue cover glaze is fundamentally solved.

The invention discloses a nitrate-free environment-friendly steel plate enamel low-temperature titanium dioxide cover glaze and a preparation method thereof. The invention belongs to the technical field of enamel. The formula comprises the following components in parts by mass: 38-40 parts of quartz, 33-35 parts of borax anhydrous, 0.01-0.02 part of cobalt oxide, 14-16 parts of titanium dioxide, 1.8-2.5 parts of magnesium carbonate, 2-4 parts of sodium tripolyphosphate, 6-8 parts of sodium fluosilicate, 4-6 parts of potassium carbonate and 1.5-2 parts of aluminum oxide. The raw materials are uniformly mixed according to the proportion and are molten under the condition of pure oxygen at 1230 + / -10 DEG C, and the firing temperature of the finished product is 760-790 DEG C. The formula of the low-temperature titanium white cover glaze does not contain nitrate, and the major technical problem that in the production process of existing steel plate enamel low-temperature titanium white cover glaze, nitrogen oxide (NOx) gas is generated and discharged to pollute the environment is fundamentally solved.

The invention discloses a system for cooling a vertical furnace and utilizing residual heat, and belongs to the technical field of pellet sintering. The problems of low residual heat utilization rate and high pellet-out temperature are universal in the conventional sintering technology. The outside air enters a cooling zone of the vertical furnace under the suction of a combustion fan. The temperature is raised while the temperature of pellets is reduced. Then, the air enters a combustor through the combustion fan. The system for cooling the vertical furnace and utilizing the residual heat improves the temperature of the combustion air, increases a ratio of the combustion air to the fuel, obtains more high-temperature gas by using less fuel, reduces the energy consumption, simultaneously improves the oxidizing atmosphere, contributes to pellet consolidation, reduces the pellet-out temperature, and provides convenience for integral control of the hot air.

A sintering device with hot-air oxygen enrichment and a sintering method with hot-air oxygen enrichment are provided, which belongs to the technology field of sintering production in steel industry. The device comprises a filter equipment, a blower, a cooler, a member module, a suction pump, a separation unit, a nitrogen-rich gas tank, a buffer tank and an oxygen-rich gas tank mutually connected via a gas pipeline in turns. The flow passing through the material layer is heated by the flue gas waste heat introduced in a cooling machine to facilitate the sintering temperature of the upper material layer rising, reduce the temperature difference between the upper and lower layers and improve sinter quality and reduce energy consumption. The introduction of the oxygen-rich air can obviously improve fuel combustion conditions and reinforce the oxidizing atmosphere of material layers, thereby achieving the advantages of improving drum strength and productivity of sinter, reducing fuel consumption and improving sinter metallurgical property, etc. The oxygen-enriched process has simple flow, compact structure, no environmental pollution, fast effect and long service life.

The invention discloses a roasting method for refining vanadium pentoxide, which comprises the steps, performing heating roasting to a mixture of raw ore of stone coal navajoite and decarburization slag of the stone coal navajoite, or the raw ore of the stone coal navajoite, or the decarburization slag of the stone coal navajoite, or a vanadium-containing material containing tiny combustible components, or a vanadium-containing material containing no combustible component which serves as a raw material; enabling the raw material to enter into a roasting chamber at an ignition point lower than that of contained carbon or in a normal-temperature state so as to be roasted; enabling a roasting heat source in the roasting chamber to be high-temperature gas directly sprayed into each part of raw material through at least one group of pipelines arranged in the roasting chamber and / or a combustible material evenly sprayed in the raw material through at least one group of pipelines arranged in the roasting chamber, and performing ignition; and being capable of performing crushing, grinding, pelletizing, addition of an additive and the like before the raw material enters into the roasting chamber. The roasting method has the advantages of being scientific and reasonable, low in energy consumption and oxygen consumption, high in vanadium conversion rate and yield and low in pollution.

The invention provides a glass raw material composition. The glass raw material composition comprises, by weight, 35 to 60 parts of Bi2O3, 10 to 30 parts of B2O3, 10 to 20 parts of SiO2, 1 to 5 parts of CaO, 0.5 to 5 parts of MgO, 0 to 5 parts of Al2O3, 3 to 8 parts of Sb2O3 and Sb2O5, and a nitrate of which the content is 0.5 to 1.5 times the content of Sb2O3, wherein the nitrate is magnesium nitrate or calcium nitrate. The invention also provides inorganic glass powder prepared from the glass raw material composition, crystalline silicon solar battery aluminum conductive paste prepared from the inorganic glass powder, and a preparation method of the crystalline silicon solar battery aluminum conductive paste. The clear inorganic glass powder can be prepared from the glass raw material composition and thus a battery piece prepared from the crystalline silicon solar battery aluminum conductive paste containing the inorganic glass powder has high photoelectric conversion efficiency and high water boiling resistance.

The invention relates to composite Na-based bentonite and a preparation method thereof. The composite Na-based bentonite is prepared by the following steps of material selecting, drying, chemosynthesiThe invention relates to composite Na-based bentonite and a preparation method thereof. The composite Na-based bentonite is prepared by the following steps of material selecting, drying, chemosynthesis, crushing, re-synthesis and post-processing. The composite Na-based bentonitic clay prepared according to the method solves the problem that is required to be solved but can not be solved in iron ins, crushing, re-synthesis and post-processing. The composite Na-based bentonitic clay prepared according to the method solves the problem that is required to be solved but can not be solved in iron industry for many years, greatly reduces the soil quantity during the production, and simultaneously realizes multiple comprehensive economic benefits and environment-protective benefits of saving energdustry for many years, greatly reduces the soil quantity during the production, and simultaneously realizes multiple comprehensive economic benefits and environment-protective benefits of saving energy, reducing consumption, improving output, reducing slag discharging and reducing pollution.y, reducing consumption, improving output, reducing slag discharging and reducing pollution.

The invention discloses a formula and a method for manufacturing ceramic tile blank bodies by utilizing polished waste residues. The formula adopts ingredients by weight portions: porcelain clays account for 18 to 40 parts, clays account for 20 to 30 parts, limestone grains account for 1 to 10 parts, wollastonite grains account for 3 to 15 parts, glazed tile sludge residues account for 3 to 10 parts, ceramic polished waste residues account for 15 to 45 parts, soluble glass accounts for 1 to 2 parts, thinners account for 0.15 to 0.4 parts, sodium tripolyphosphate accounts for 0.05 to 0.2 parts, and a proper amount of water is adopted. A manufacturing method of the ceramic tile blank bodies comprises the steps as follows: a. raw materials are put in a ball grinder for ball milling after being blended so as to form sizing agents with proper fineness and screen tailings through milling, and the sizing agents are processed through deferrization, sieving and spray drying so as to form powders; and b. the powders are put in a die cavity of a press forming machine to form waterish blanks through pressing, the waterish blanks are dried in a drying kiln, the dried waterish blanks are applied with base pulp and then enter a biscuit firing kiln, biscuit firing is carried out under the temperature ranging from 1080 to 1160 DEG C, heat preservation is carried out in an area with the temperature ranging from 1040 to 1060 DEG C, the sintering time of the area is prolonged, and the sintering process for oxidizing atmosphere can be enhanced at the same time so as to obtain the ceramic tile blank bodies.

The invention discloses a nitrate-free environment-friendly cast iron enamel low-temperature ground coat and a preparation method thereof, and belongs to the technical field of enamel, and the formula comprises the following components in parts by mass: 10-14 parts of quartz, 29-31 parts of anhydrous borax, 6-8 parts of sodium carbonate, 3.5-6.0 parts of potassium carbonate, 8-9 parts of barium carbonate, 7-8 parts of fluorite, 24-26 parts of potassium feldspar, 1.2-1.6 parts of magnesium carbonate, 1.2-1.4 parts of nickel oxide and 0.5-0.6 part of copper oxide. 1.2 to 1.4 parts of manganese oxide, 0.5 to 0.6 part of cobalt oxide and 0.8 to 0.9 part of aluminum oxide. The raw materials are uniformly mixed according to the proportion and are molten under the condition of pure oxygen at 1230 + / -10 DEG C, and the firing temperature of the finished product is 740-760 DEG C. The formula does not contain nitrate, and the major technical problem that in the production process of existing cast iron enamel low-temperature ground glaze, nitrogen oxide (NOx) gas is generated and discharged to pollute the environment is fundamentally solved.

The invention discloses a nitrate-free environment-friendly cast iron enamel high-temperature acid-resistant ground coat and a preparation method thereof, and belongs to the technical field of enamel, the formula comprises the following components by mass: 50-54 parts of quartz, 24-27 parts of anhydrous borax, 5-7 parts of sodium carbonate, 1.5-1.7 parts of manganese oxide, 0.7-0.9 part of cobalt oxide, 4.5-5.5 parts of calcium carbonate, 4-5 parts of sodium fluosilicate, 3.0-4.0 parts of titanium dioxide, and 2.0-3.8 parts of potassium feldspar. And 3.5 to 4.5 parts of lithium carbonate. The raw materials are uniformly mixed according to the proportion and are molten under the condition of pure oxygen at 1290 + / -10 DEG C, and the firing temperature of the finished product is 800-820 DEG C. The formula does not contain nitrate, and the major technical problem that in the production process of existing cast iron enamel high-temperature acid-resistant ground coat, nitrogen oxide (NOx) gas is generated and discharged to pollute the environment is fundamentally solved.

The invention discloses nitrate-free environment-friendly medium-temperature pearlescent glaze for an enameled steel plate and a preparation method, and belongs to the technical field of enamel, the nitrate-free environment-friendly medium-temperature pearlescent glaze comprises the following components in parts by mass: 38-44 parts of quartz, 12-14 parts of borax, 16-18 parts of potassium feldspar, 0.7-3 parts of potassium carbonate, 8-11 parts of titanium dioxide, 2-5 parts of calcium carbonate, 10-12 parts of sodium carbonate, 3-8 parts of sodium fluosilicate and 0.5-1 part of lithium carbonate. And 2-5 parts of talcum powder. The raw materials are uniformly mixed according to the proportion and are melted at 1260 + / -10 DEG C, and the firing temperature of the finished product is 800-840 DEG C. The formula does not contain nitrate, and the technical problem that the environment is polluted due to emission of nitrogen oxide (NOx) gas generated in the production and processing process of the existing medium-temperature pearlescent glaze for the enameled steel sheet is fundamentally solved.

The invention discloses nitrate-free environment-friendly steel plate enamel high-temperature transparent glaze and a preparation method thereof, and belongs to the technical field of enamel, and the formula comprises the following components in parts by mass: 21-23 parts of borax anhydrous, 36-38 parts of potassium feldspar, 19-21 parts of quartz, 6-8 parts of sodium fluosilicate, 5-7 parts of fluorite, 4-6 parts of titanium dioxide, 6-8 parts of aluminum oxide and 2-4 parts of barium carbonate. The raw materials are uniformly mixed according to the proportion and are molten under the condition of pure oxygen at 1290 + / -10 DEG C, and the firing temperature of the finished product is 850-880 DEG C. The formula does not contain nitrate, and the major technical problem that in the production process of existing steel plate enamel high-temperature transparent glaze, nitrogen oxide (NOx) gas is generated and discharged to pollute the environment is fundamentally solved.