Class / Patent application number | Description | Number of patent applications / Date published |
075415000 | Foam | 7 |
20120304823 | METHOD FOR PREPARING SPONGE TITANIUM FROM POTASSIUM FLUOTITANATE BY ALUMINOTHERMIC REDUCTION - The invention provides a method for preparing sponge titanium from potassium fluotitanate by aluminothermic reduction, comprising the following steps: a reaction step: aluminum and zinc are mixed under a vacuum state, and the mixture is then reacted with potassium fluotitanate; a distillation step: KF, AlF | 12-06-2012 |
20120304824 | TECHNOLOGICAL METHOD FOR PREPARING SPONGE TITANIUM FROM SODIUM FLUOTITANATE RAW MATERIAL - The invention provides a technological method for preparing sponge titanium from sodium fluotitanate raw material, comprising the following steps: step A: placing aluminum in an airtight resistance furnace, evacuating, introducing inert gas into the resistance furnace, and heating the aluminum to obtain molten aluminum; step B: opening a reactor cover, adding a proper amount of sodium fluotitanate into the reactor, closing the reactor cover, detecting leakage, slowly heating the reactor to 150° C., evacuating and continuously heating the reactor to 250° C.; step C: introducing inert gas into the reactor, continuously heating the reactor to 900° C., and stirring uniformly; step D: opening a valve, adjusting the stirring speed, dripping the molten aluminum, and controlling the temperature of reaction in a range from 900 to 1000° C.; and step E: opening the reactor cover, removing a stirring device out of the reactor, and eliminating NaAlF | 12-06-2012 |
20130098206 | METHOD FOR CYCLICALLY PREPARING TITANIUM SPONGE AND COPRODUCING SODIUM CRYOLITE USING SODIUM FLUOTITANATE AS INTERMEDIATE MATERIAL - A method for cyclically preparing titanium sponge and coproducing sodium cryolite using sodium fluotitanate as an intermediate material, which includes the following steps: A) adding hydrofluoric acid to titaniferous iron concentrate to enable a reaction to form fluotitanic acid; B) adding sodium carbonate and sodium hydroxide to the fluotitanic acid to enable a reaction to form the sodium fluotitanate; C) putting the sodium fluotitanate into a reactor, adding aluminium to react with the sodium fluotitanate to form the titanium sponge and sodium cryolite; D) extracting the sodium cryolite and sending it to a rotary reaction kettle together with concentrated sulphuric acid to enable a reaction to form hydrogen fluoride gas and sodium sulphate, aluminium sodium sulphate; collecting the hydrogen fluoride gas and dissolving it into water to obtain a hydrofluoric acid solution; E) recycling the obtained hydrofluoric acid to Step A to leach the titaniferous iron concentrate. | 04-25-2013 |
20130098207 | METHOD FOR CYCLICALLY PREPARING TITANIUM SPONGE AND COPRODUCING POTASSIUM CRYOLITE USING POTASSIUM FLUOTITANATE AS INTERMEDIATE MATERIAL - A method for cyclically preparing titanium sponge and coproducing potassium cryolite using potassium fluotitanate as an intermediate material, which includes the following steps: A) adding hydrofluoric acid to titaniferous iron concentrate to enable a reaction to form fluotitanic acid; B) adding potassium sulphate to the fluotitanic acid to enable a reaction to form the potassium fluotitanate; C) putting the potassium fluotitanate into a reactor, adding aluminium to react with the potassium fluotitanate to form the titanium sponge and potassium cryolite; D) extracting the potassium cryolite and sending it to a rotary reaction kettle together with concentrated sulphuric acid to enable a reaction to form hydrogen fluoride gas and potassium sulphate, aluminium potassium sulphate; collecting the hydrogen fluoride gas and dissolving it into water to obtain a hydrofluoric acid aqueous solution; E) recycling the obtained hydrofluoric acid aqueous solution to Step A to leach the titaniferous iron concentrate. | 04-25-2013 |
20130305883 | METHOD AND APPARATUS FOR PRODUCING DIRECT REDUCED IRON UTILIZING A SOURCE OF REDUCING GAS COMPRISING HYDROGEN AND CARBON MONOXIDE - The present invention concerns a method and an apparatus for producing DRI (Direct Reduced Iron) utilizing a high-oxidation reducing gas containing carbon monoxide and hydrogen, derived directly or indirectly from the gasification of hydrocarbons or coal, with a high content of oxidants (H | 11-21-2013 |
20150114180 | APPARATUS AND PROCESS FOR SURFACE GASIFICATION IN A REDUCTION REATOR SHAFT - Apparatus for production of metal sponge or pig iron from metal oxide containing material in piece form using a reduction gas. A reduction reactor shaft ( | 04-30-2015 |
20160168653 | METHODS AND SYSTEMS FOR PRODUCING DIRECT REDUCED IRON INCORPORATING A CARBON DIOXIDE AND STEAM REFORMER FED BY RECOVERED CARBON DIOXIDE | 06-16-2016 |