329 results about "Glass furnace" patented technology

A glass melting furnace has a gas inlet positioned proximate to a charging section oxy-fuel combustion region to introduce gas into the region and to at least partially displace gas having a partial pressure of alkali vapor from the region, and optionally a gas outlet is adapted to provide an exit for a volume of furnace atmosphere. A method for reducing alkali vapor corrosion of glass furnace refractory structures includes providing a gas inlet proximate to the oxy-fuel combustion region; introducing a volume of gas from the inlet into the region, displacing a volume of gas having a partial pressure of alkali vapor from the region; and, optionally providing a gas outlet adapted to provide an exit for a volume of furnace atmosphere.

The invention discloses a silica brick for a glass furnace, and belongs to the technical field of refractory materials. The silica brick for a glass furnace comprises: by weight, 30 to 45% of silica having particle sizes of 3 to 1.0mm, 5 to 25% of silica having particle sizes of 1.0 to 0.5mm, 30 to 50% of silica having particle sizes less than 0.5mm, an additive and a composite additive, wherein the weight of the additive is 5 to 15% of the total weight of the silica and the weight of the composite additive is 2 to 10% of the total weight of the silica. SiO2 content of the silica is great than or equal to 99%. Al2O3 content of the silica is less than or equal to 0.25%. Fe2O3 content of the silica is less than or equal to 0.45%. The additive is a waste silica material having SiO2 content great than or equal to 96%. The composite additive is a mixture of lime milk, mill scales and calcium lignosulphonate. The silica brick for a glass furnace has high SiO2 content, a high yield, low impurity content, low apparent porosity, good high-temperature performances and a long service life. A preparation technology of the silica brick for a glass furnace is simple and is suitable for large-scale production.

The invention provides a power-generation and denitrification integrated device by residual heat of a glass furnace and a method thereof, relating to the field of waste gas chemical purification treatment. Regarding NOX in large-output volume continuous flue gas in flat glass industry, SCR and SNCR technologies are adopted currently. SCR has the problems of large equipment investment, high technical difficulty, residual heat waste and the like, while SNCR has a large NH3 usage amount, is hard to ensure reacting temperature and staying time, can easily cause secondary pollution, and has low denitrification efficiency. Aiming at the problems and being different from hot topic studying directions, such as high-performance low-temperature denitrification catalyst, additive and the like, the invention discloses the power-generation and denitrification integrated device by the residual heat of the glass furnace and the method thereof, wherein a denitrification system is arranged between the overheat section and an evaporation section of the residual heat boiler; the temperature of the flue gas is cooled to a medium temperature range by using the overheat section of the primary residual heat boiler; and the flue gas performs a catalytic reduction with a reducing agent NH3 in a reactor under the action of a catalyst V2O5/TiO2 to generate non-polluted N2 and H2O, and the temperature of denitrification and catalysis is between 300 and 400 DEG C.

The invention discloses a black glass ceramic and a production method thereof in order to solve the problems of the conventional glass ceramic, i.e. single color and high production technique cost. The black glass ceramic is produced with the following components in part by weight: 25 to 50 parts of iron tailings, 20 to 50 parts of quartz sand, 10 to 32 parts of petalite, 2 to 6 parts of sodium carbonate, 2 to 6 parts of zinc oxide, 2 to 6 parts of barium carbonate, 0 to 0.1 part of copper oxide, 0 to 2 parts of manganese dioxide, 0 to 0.2 part of cobalt oxide, 0 to 2 parts of chromic oxide and 0 to 3 parts of sodium nitrate. Since the invention utilizes the discarded iron tailings as the material of the black glass ceramic, the waste is made profitable, pollution is reduced, the environment is protected, moreover, the physicochemical performance of the product can be enhanced, and the single-color problem of the black glass ceramic is solved; the corrosion of the refractory material of a glass furnace by molten glass is reduced, and thereby the service life of the equipment is prolonged; and the application range of the black glass ceramic is wide.

Heat in a stream of combustion products obtained from a glassmelting furnace heated by oxy-fuel combustion is passed to incoming glassmaking materials in a heat exchanger without requiring reduction of the temperature of the stream yet without causing softening of the glassmaking material.

The invention discloses a method for producing microcrystalling foam glass with gold tail ore, which comprises the steps of: firstly, putting gold tail ore powder, waste glass powder, fluorite powder, sodium nitrate powder, calcite powder, pure alkali powder, sodium fluosilicate powder and antimonous oxide powder into a mixer to be evenly mixed, and putting into a glass furnace to be melted; draining molten glass liquid into a water pond and water quenching; fishing out water quenched glass, and ball milling and screening with 150 screen mesh to produce the glass powder; and putting the glass powder, foaming agent, ammonium dihydrogen phosphate, iron sesquioxide and manganese dioxide powder into the mixer to be evenly mixed, putting into a foam glass-producing mould, and moving the mould into to a foaming furnace and heating to obtain the microcrystalling foam glass by means of temperature raising, fast cooling and annealing.The method not only is good for recycling waste substance and protecting environment, but also has low producing and foaming temperature and simple production technology, and the produced foaming glass has high structural intensity, low water absorption rate, small density and low heat conduction coefficient.

The present invention relates to a sintered product elaborated from a starting charge containing 75-99% of zircon, in mass percentage based on the oxides and having the following average weight chemical composition, in mass percentages based on the oxides

60%≦ZrO₂≦72.8%,

27%≦SiO₂≦36%,

0.1%≦B₂O₃+GeO₂+P₂O₅+Sb₂O₃+Nb₂O₅+Ta₂O₅+V₂O₅,

0.1%≦ZnO+PbO+CdO,

B₂O₃+GeO₂+P₂O₅+Sb₂O₃+Nb₂O₅+Ta₂O₅+V₂O₅+ZnO+PbO+CdO≦5%

0% ≦Al₂O₃+TiO₂+MgO+Fe₂O₃+NiO+MnO₂+CoO+CuO≦5%,

other oxides: ≦1.5%,

• for a total of 100%.

Notably used in a glass furnace.

The invention belongs to the technical field of smoke purifying, and provides a glass-furnace-smoke integrated-denitration-desulfurization-dedusting technological device and a technology. A waste-heat boiler (2) of the glass-furnace-smoke synchronous denitration-desulfurization-dedusting technological device is internally and sequentially provided with a primary heat exchanger (7), a medium-temperature denitration reactor (8), a secondary heat exchanger (9) and a multistage heat exchanger (10) from front to back in the smoke flow direction; a low-temperature denitration-desulfurization-dedusting reacting tower (3) comprises a tower body divided into a main tower body (11) and an auxiliary tower body (12); a reducing agent evaporator (13) is arranged in a smoke inlet in one side of the main tower body (11); a low-temperature catalysis reacting bed (20) is arranged in the auxiliary tower body (12). By means of the glass-furnace-smoke integrated-denitration-desulfurization-dedusting technological device and the technology, the one-time investment cost and the occupied area are saved, and meanwhile the operating cost is reduced; and the aims of clean governance and zero release are achieved as a whole.

The invention discloses blue glass ceramics and a preparation method thereof, and aims to solve the problems of single color and high production process cost of the conventional glass ceramics. The blue glass ceramics are prepared from the following components in part by weight which serve as raw materials: 30 to 55 parts of iron tailings, 20 to 450 parts of quartz sand, 10 to 30 parts of lithium feldspar, 2 to 6 parts of soda ash, 2 to 6 parts of zinc oxide, 2 to 6 parts of barium carbonate, 0 to 1 part of manganese dioxide, 0 to 0.4 part of cobalt oxide and 0 to 3 parts of sodium nitrate. The invention makes waste profitable by using the iron tailings which are wastes as the raw material of the blue glass ceramics, can reduce pollution and protect environment, improve physiochemical performance of the product, solve the problem of single color of the glass ceramics, lighten corrosion of glass metal to a refractory material of a glass furnace and prolong service life of equipment. The blue glass ceramics of the invention have wide application.

The invention relates to a method for producing glass board products online, which aims to solve the problems of high equipment investment and high production cost of the prior method. After melting liquid glass flowing out form a glass furnace is shaped by a flat board glass shaper, glass boards are cut at the temperature from 550 DEG C to 900 DEG C, and heat processing or after-shaped heat processing is carried out to the glass boards. The glass boards are cut at the temperature from 550 DEG C to 900 DEG C, and the solid plastic temperature sections of the glass boards are cut by an online synchronous cutter which comprises a transverse cutting knife and a longitudinal cutting knife or a model cutting knife with the same size and shape as a processed glass product. The glass board products are made of plane steel glass, curved-surface steel glass, thin reinforced glass, hot-bent glass or curved-surface doubling glass. The invention can save the investment on preprocessing equipment, simplify production technology and obviously save baking expense, and has the advantages of low investment and low cost.

The present invention is surface reinforcing method for tuyere of blast furnace. The technological scheme of the present invention includes co-permeating alloy elements to reinforce the surface of tuyere and form surface copper alloy layer; and hot spraying to the surface of copper alloy layer to form a surface reinforcing layer. The method of the present invention has no high temperature falling-off of the coating and reinforcement on the co-permeated layer. The tuyere has excellent heat conducting performance, reinforced surface and long service life.

The invention relates to a sheet glass stove, in particular for tempering glass panes comprising a lower stove part (1) provided with stove rollers (6) for transporting the temperable glass panes, wherein the axes of rotation of said stove rollers (6) are arranged substantially in a perpendicular position to the direction of a glass pane extension. The stove also comprises a top stove part (2) consisting of a central section (3) and a lid (4). Said stove also provided with lower heating groups (8) and top heating groups (10), wherein said heating groups (8) are extended under the stove rollers (6) and the top heating groups (10) are extended thereabove and are formed by electric heat resistances. The inventive sheet glass stove comprises several air circulation units (11), which are mounted in the top stove part (2) above the top heating groups (10) and comprise an air circulating hood (12) and an integrated fan wheel (14), respectively, wherein said air circulating hood (12) is provided with exhaust openings (19), which communicate with the stove lower space in the top section of the top stove part (2), and several air nozzles (17) located on the bottom side of the air circulating hood (12) are supplied with compressed air by the fan wheel (14) and lead a coming out air stream in the direction of a heatable glass pane.

The invention discloses a silicon controlled rectifier (SCR) denitration device for flue gas of a glass furnace, which comprises a flue gas flow controller, an ammonia/flue gas mixed flue, a liquid ammonia bottle, a pressure reducing valve, an ammonia preheater, a flow meter, an ammonia injection controller, an electric heater and a reactor bed. One end of the ammonia/flue gas mixed flue is connected with a flue pipe of the glass furnace; the flue gas flow controller is arranged on the flue; the flue gas flow controller is connected with the ammonia injection controller through a data line and controls the flow meter which is connected to the ammonia injection controller; one end of the flow meter is connected with the ammonia/flue gas mixed flue pipe and the other end of the flow meter is connected with the ammonia preheater, the pressure reducing valve and the liquid ammonia bottle; the ammonia/flue gas mixed flue is connected with the electric heater through the flue; and the reactor bed is arranged inside the electric heater and is connected with a chimney pipe through the flue. The SCR denitration device has the advantages that: the device has higher removal efficiency and lower reaction temperature, needs less energy required by gas heating, saves the production cost, improves the exhaust temperature, and reduces the acid corrosion of the flue.

The invention relates to a glass ceramic and a preparation method thereof, comprising the following raw materials by weight parts: 75-100 weight parts of quartz sands, 10-30 weight parts of lithium feldspar, 30-60 weight parts of feldspar, 25-45 weight parts of sodium carbonate, 2-8 weight parts of sodium nitrate, 2-6 weight parts of barium carbonate, 5-15 weight parts of fluorite powders, 5-10 weight parts of borax, 10-30 weight parts of sodium fluosilicate and 10-20 weight parts of calcite; the method comprises the following steps of: mixing the raw materials and sending the mixture in a glass furnace; melting the mixture as glass melt at the temperature of 1400-1600 DEG C; sending the glass melt into a material supply machine by a material supply passage; sending the glass melt into a forming machine for forming by the material supply machine; sending the formed product into an annealing furnace for annealing; subsequently inspecting the quality of the annealed product; returning the unqualified product to the raw material; and conducting the operations of applique, enamel firing and steeling to the qualified product so as to prepare the finished products. Compared with the prior art, the method has the advantages of low expansion heat-resistance performance, high hardness, being not easy to be scraped or cracked, environmental protection and the like.

The invention relates to a method and a special device for preheating a batch by using the waste heat of fume from a pure-oxygen combustion glass furnace. The method comprises the following steps: granulating the glass batch; dehydrating and drying the grains; and preheating the grains by using a multilayer vertical turning plate preheating mode, wherein the glass batch and the hot fume are contacted indirectly, namely the fume radiates heat to the glass batch by convection, and the glass batch is preheated by a multilayer turning plate preheater to above 400 DEG C and then is delivered to the next process step. Multiple layers of turning plates and multiple flues are arranged in the preheating device, a fume inlet communicated with the flues is positioned on the outer side of the side water on the lower part of the preheater, a fume outlet communicated with the flues is positioned on the outer side of the other side wall on the upper part of the preheater, and the fume inlet and the fume outlet are arranged diagonally; the special preheating device is used to preheat the glass batch, the utilization rate of the waste heat of the high-temperature fume is high, no smoke dust pollution is produced; under self suction, the fume rises along the flues, so no power is consumed; the vertical structure occupies small floor area, so the replacement of space for time is realized; and the promotion and implementation of the device are easy.

The invention relates to a solid glass microballoon for explosive marking and a method for preparing the same. The solid glass microballoon comprises basic glass oxide, marking oxide and fluorescence oxide, and is prepared by the following steps: blending and mixing the oxides; filling the mixture into a glass furnace to perform melting at a temperature of between 1,200 and 1,550 DEG C and keeping the temperature for 2 to 10 hours; pouring the mixture into cold water quickly to perform quenching; breaking the cracked glass obtained after the quenching, and screening the broken glass to obtain glass particles of which the particle diameter is between 10 and 2,000 mu m; and melting the glass particles in high-temperature fire of which the temperature is higher than the melting temperature of the glass, and breaking away from the fire to obtain the glass microballoon. By adding the oxides with different types and contents into the glass as a marking characteristic, the marking capacity of explosives is improved, and through extracting markers in the explosives before explosion or on site after the explosion, the correlative information on explosive production, circulation, and the like can be found out so as to achieve the aim of marking the explosives.

The invention discloses a crystal liquid substrate glass material and a preparation method thereof. 50-61 percent of monox by weight percent, 8.15-11.35 percnet of boric oxide by weight percent and 10-14.5 percent of alumina by weight percent are mixed uniformly, melted at 800-over 1000 DEG C, preserved for 6-10 hours at the temperature and cooled; the cooled mixture is pulverized and screened to obtain premix; the premix of monox, boric oxide and alumina is mixed with other components according to the following weight percentage: 1-4.5 percent of strontium caronate, 2.8-8.0 percent of barium carbonate, 4-9.48 percent of calcium carbonate, 0-0.5 percent of magnesium carbonate, 0-0.5 percent of zinc oxide and 4-6.0 percent of barium nitrate; and the above materials are thrown into a glass furnace after being mixed uniformly and stirred, and the crystal liquid substrate glass is finally obtained by drawing after melting at 1500-1650 DEG C and clarification. The invention can enhance the melting capacity of glass and improve the clarification effect of glass.

A system and method of drying wet items including roving packages, cakes and bobbins of wound wet glass fibers and/or wet glass fiber strand(s) by first preheating the wet items using waste hot gases coming from any source including a glass furnace, a dryer or a heat engine operating to generate electrical power prior to removing much, most or all of the moisture in the wet roving packages, cakes and bobbins using a dielectric or microwave oven, to save energy, reduce drying costs and to increase the capacity of dielectric or microwave dryers.