摘要:
The invention relates to a process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising a reaction between silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being fed with a gas containing oxygen, an excess of fuel/reducing agent being introduced into the reactor relative to the oxygen effectively consumed. The process allows the reaction to be carried out satisfactorily and at relatively low temperature.
摘要:
The invention relates to a furnace for the continuous melting of a composition comprising silica, the said furnace comprising at least two tanks in series, said tanks each comprising at least one burner submerged in the melt. The invention also relates to the process for manufacturing compositions comprising silica using the furnace, the silica and the fluxing agent for the silica being introduced into the first tank. The invention makes it possible to produce glass color frits, tile frits and enamel with a high productivity, low temperatures and short transition times.
摘要:
The invention relates to a process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising a reaction between silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being fed with a gas containing oxygen, an excess of fuel/reducing agent being introduced into the reactor relative to the oxygen effectively consumed. The process allows the reaction to be carried out satisfactorily and at relatively low temperature.
摘要:
The invention relates to a furnace for the continuous melting of a composition comprising silica, the said furnace comprising at least two tanks in series, said tanks each comprising at least one burner submerged in the melt. The invention also relates to the process for manufacturing compositions comprising silica using the furnace, the silica and the fluxing agent for the silica being introduced into the first tank. The invention makes it possible to produce glass color frits, tile frits and enamel with a high productivity, low temperatures and short transition times.
摘要:
The invention relates to a process for manufacturing a combustible gas having a lower heating value of at least 1 MJ/Nm3, comprising the reaction of an oxidizing gas comprising steam or oxygen or CO2 with an organic material in contact with a molten silicate bath held in a tank and comprising a heat supply into the molten silicate, said process operating continuously, silicate being regularly drained from the tank and vitrifiable materials being regularly introduced in order to feed the silicate bath. The heat supply is preferably of the submerged combustion type. The invention also relates to a continuous industrial manufacturing process comprising continuous production, in an industrial production unit comprising a gaseous fuel burner that generates combustion gases; continuous production of steam in a boiler; and continuous production of combustible gas in a unit for producing combustible gas comprising the reaction of an oxidizing gas comprising steam with an organic material, the combustion gases being conveyed to the boiler in order to vaporize water and produce steam, the steam produced by the boiler being conveyed to the unit for producing combustible gas in order to react with the organic material, the combustible gas being conveyed to the industrial production unit in order to be burnt therein as a gaseous fuel.
摘要:
The invention relates to a glass composition of silica-soda-lime type colored blue which comprises the coloring agents below in a content varying within the following limits, by weight: Fe2O3 (total iron)0.2 to 0.51% CoO10 to 50ppm Cr2O310 to 300ppm CuO0-400ppm the glass exhibiting a redox factor of less than 0.35, a dominant wavelength λD of between 485 and 489 nm, an excitation purity of less than 13% and a selectivity at least equal to 1.1 under a thickness of between 3 and 5 mm. It also relates to the glass sheet obtained from the abovementioned composition, said sheet being intended in particular to form an automobile window or for the construction industry.
摘要翻译:本发明涉及一种二氧化硅 - 钠钙型着色蓝的玻璃组合物,其含有以下着色剂,其含量在以下限度内,以重量计:Fe 2 O 3(总铁)0.2〜0.51%CoO 10〜50ppm Cr 2 O 3 10 至300ppm CuO 0-400ppm,表现出小于0.35的氧化还原因子,485至489nm之间的主波长λD,小于13%的激发纯度和至少等于1.1的选择性, 在3和5毫米之间。 它还涉及由上述组合物获得的玻璃板,所述片材特别用于形成汽车窗户或用于建筑工业。
摘要:
The subject of the invention is a process for manufacturing compounds based on one or more silicates of alkali metals, such as Na and K and/or alkaline earth metals such as Ca, Mg, and/or on rare earths, such as Ce, optionally in the form of mixed silicates which combine alkaline-earth metals, such as Ca, with the alkali metal(s) and the rare earth(s), by conversion of silica and of halides, especially of one or more chlorides, or sulfate or nitrate, of the said alkali metals and/or of the said rare earths and/or of the said alkaline-earth metals, such as NaCl, KCl or CeCl4. The heat needed for the conversion is supplied, at least partly, by one or more submerged burners.The subject of the invention is also an apparatus for carrying out the process and for its use.
摘要:
The invention relates to a glass composition of silica-soda-lime type colored blue which comprises the coloring agents below in a content varying within the following limits, by weight: Fe2O3 (total iron)0.2 to 0.51% CoO10 to 50ppm Cr2O310 to 300ppm CuO0-400ppm the glass exhibiting a redox factor of less than 0.35, a dominant wavelength λD of between 485 and 489 nm, an excitation purity of less than 13% and a selectivity at least equal to 1.1 under a thickness of between 3 and 5 mm. It also relates to the glass sheet obtained from the abovementioned composition, said sheet being intended in particular to form an automobile window or for the construction industry.
摘要翻译:本发明涉及一种二氧化硅 - 钠钙型着色蓝的玻璃组合物,其含有以下着色剂,其含量在以下限度内,以重量计:Fe 2 O 3(总铁)0.2〜0.51%CoO 10〜50ppm Cr 2 O 3 10 至300ppm CuO 0-400ppm,表现出小于0.35的氧化还原因子,485至489nm之间的主波长λD,小于13%的激发纯度和至少等于1.1的选择性, 在3和5毫米之间。 它还涉及由上述组合物获得的玻璃板,所述片材特别用于形成汽车窗户或用于建筑工业。
摘要:
The invention relates to a process and to an installation for preparing a final glass, comprising a main furnace with electrodes and/or overhead burners, which is fed with main batch materials generating a main molten glass, and a submerged-combustion auxiliary furnace, said auxiliary furnace being fed with auxiliary batch materials, the auxiliary molten glass feeding the main furnace toward its upstream end in the first third of its length, the auxiliary glass being substantially of the same composition as the main glass. The downstream zone of the main furnace is thus used to remove both gases coming from the main glass and gases coming from the auxiliary glass, in order to finish melting the batch stones and impurities contained in the auxiliary glass and to homogenize the two glass streams from their redox standpoint, when this is necessary.
摘要:
The invention relates to a process for manufacturing compounds based on one or more silicates of alkali metals and/or of alkaline-earth metals, optionally in the form of mixed silicates that combine at least two of these elements, said process involving: (i) preferably a conversion reaction (1) in which halides of said alkali metals and/or of said rare earths and/or of said alkaline-earth metals are converted into the corresponding sulfates; (iii) a conversion reaction (2) in which said sulfates together with silica are converted into the corresponding silicates, the heat supply needed for this conversion being provided, at least in part, by a combustion reaction (3) using a submerged burner or a plurality of submerged burners.