| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 075458000 | Blast furnace reduction to produce molten Iron(Fe) | 19 |
| 20080289449 | Method for measuring an outline of a stratum of a reactant and a path of charging the reactant in a blast furnace - A method has steps of providing a three-dimensional (3-D) laser scanner, providing a computer, obtaining point group data (PGD) and calculating measuring an outline of a top reactant stratum from the PGD. The step of providing a 3-D laser scanner directs a 3-D laser scanner at reactant strata in a blast furnace and output PGD that represent digital data of an inside of the blast furnace. The step of providing a computer connects the 3-D laser scanner to a computer having a point group analysis program. The step of calculating an outline of the top reactant stratum from the PGD is performed by the point group analysis program to calculate an outline of the top reactant stratum in the blast furnace from the PGD. At least one two-dimensional laser scanner is used to measure a path of the reactant being charged. | 11-27-2008 |
| 20090114062 | Method of and smelter for producing steel with high manganese and low carbon content - A method of and a smelter for producing steel ( | 05-07-2009 |
| 20100011909 | METHOD AND DEVICE FOR PRODUCING PIG-IRON BASED STAINLESS STEEL WITHOUT USING A SUPPLY OF ELECTRICAL ENERGY - The aim of the invention is to produce stainless steel for all stainless steel products both in the austenitic and the ferritic range, based on liquid pig-iron and FeCr solids, without using a supply of electrical energy. According to the invention, the liquid pig-iron, after being pre-treated in a blast furnace ( | 01-21-2010 |
| 20100024600 | METHOD AND DEVICE FOR PRODUCING STAINLESS STEEL WITHOUT USING A SUPPLY OF ELECTRICAL ENERGY, BASED ON PIG-IRON THAT HAS BEEN PRE-TREATED IN A DDD INSTALLATION - The aim of the invention is to produce stainless steel for all stainless steel products both in the austenitic and the ferritic range, based on liquid pig-iron and FeCr solids, without using a supply of electrical energy. According to the invention, the liquid pig-iron, after being pre-treated in a blast furnace ( | 02-04-2010 |
| 20100064855 | Blast Furnace Iron Production with Integrated Power Generation - An integrated system for blast furnace iron making and power production based upon higher levels of oxygen enrichment in the blast gas is disclosed. The integrated system leads to; 1) enhanced productivity in the blast furnace, 2) more efficient power production, and 3) the potential to more economically capture and sequester carbon dioxide. Oxygen enhances the ability of coal to function as a source of carbon and to be gasified within the blast furnace thereby generating an improved fuel-containing top gas. | 03-18-2010 |
| 075459000 | Using additive to the blast | 5 |
| 075460000 | Carbonaceous | 5 |
| 20110000339 | Method of producing steel with high manganese and low carbon content - A method of producing steel ( | 01-06-2011 |
| 20120079917 | METHOD FOR THE SIMULTANEOUS PRODUCTION OF IRON AND A CRUDE SYNGAS CONTAINING CO AND H2 - The invention relates to a method for simultaneously producing iron and a crude syngas containing CO and H | 04-05-2012 |
| 20180023152 | METHOD FOR OPERATING BLAST FURNACE | 01-25-2018 |
| 075463000 | Gaseous | 2 |
| 075464000 | Recycled off gas | 2 |
| 20160083810 | BLAST FURNACE AND METHOD FOR OPERATING A BLAST FURNACE - The present invention is directed to a blast furnace and a method for operating a blast furnace which are able to reduce the CO | 03-24-2016 |
| 20170234619 | METHOD FOR BLOWING SUBSTITUTE REDUCING AGENTS INTO A BLAST FURNACE | 08-17-2017 |
| 075467000 | Tapping molten product | 2 |
| 20100229685 | PROCESS FOR PRODUCING MOLTEN IRON - A process for producing molten iron is a process in which while an inert gas is blown into a molten iron layer in an iron bath type melting furnace through bottom-blown tuyeres provided in a hearth bottom thereof to stir the molten iron layer, a carbon material, an additive flux, and solid reduced iron obtained by heating reduction of carbon composite iron oxide briquettes are charged into the above melting furnace, and top blowing of an oxygen-containing gas is performed through a top-blown lance provided for the melting furnace, so that the solid reduced iron is melted by combustion heat obtained by combusting the carbon material and/or carbon in molten iron to form molten iron. In addition, in this process for producing molten iron, the carbon material is charged so as to form a carbon material suspension slag layer in which the carbon material is suspended at an upper layer portion of a slag layer which is formed of slag generated when the solid reduced iron on the molten iron layer is melted into molten iron and further so as to form a carbon material covering layer made of only the carbon material on the carbon material suspension slag layer, and the molten iron and the slag accumulated in the melting furnace are discharged through a taphole provided at a lower portion of a furnace side of the melting furnace. | 09-16-2010 |
| 20120111149 | APPARATUS FOR AND METHOD OF PRODUCTION OF IRON, SEMI STEEL AND REDUCING GASES - A method is disclosed for producing cast iron or semi steel with reducing gas in a high pressure refractory lined shaft furnace using minimal or no coke Iron ore and slag are fed into the operative top zone of the shaft furnace while reducing gas which is generated in a refractory lined gasifier using preheated oxygen is fed through tuyeres at the operative bottom and middle zones. The shaft furnace is operated at a high pressure to increase productivity and to facilitate use of the spent reducing gas downstream. Excess oxygen is fed into the shaft furnace to reduce the carbon content in the molten iron and generate semi steel. The size of the furnace is reduced. The method is economical. | 05-10-2012 |
| 075468000 | Top gas recovery | 6 |
| 20090095134 | Process and Equipment for Blast Furnace Ironmaking Using Pure Oxygen and Gas - Process and equipment for blast furnace ironmaking using pure oxygen and gas The process for blast furnace ironmaking using pure oxygen and gas includes putting a mineral aggregate consisting of pellet, alkaline sinter, coke and solvent into the furnace from the furnace top, wherein each ton of iron is assigned with coke of 170-200 kg; blasting pure oxygen into the furnace, wherein each ton of molten iron is blasted with oxygen of 120-200 Nm | 04-16-2009 |
| 20110041652 | METHOD FOR PRODUCING PIG IRON - In a method for producing pig iron using iron ore with a high content of zinc, a blast furnace raw material | 02-24-2011 |
| 20110283837 | METHOD AND DEVICE FOR OPERATING A SMELTING REDUCTION PROCESS - In a method and a device for operating a smelting reduction process, at least part of an export gas from a blast furnace or a reduction unit is thermally utilized in a gas turbine and the exhaust gas of this gas turbine is used in a waste heat steam generator to generate steam. The remaining part of the export gas is fed to a CO2 separation apparatus, the tail gas thereby obtained being fed to a waste heat steam generator and burned for additional steam generation. The combustible components of the tail gas are sent for thermal utilization in a steam generator, so that the overall energy balance of the thermal use of the export gas is improved. In addition, a further part of the export gas is qualitatively improved by the CO2 separation apparatus, so as to generate a high-quality reduction gas which can be supplied for metallurgical use. | 11-24-2011 |
| 20150068364 | BLAST FURNACE WITH TOP-GAS RECYCLE - A blast furnace where coke is combusted with oxygen, instead of air, and where a top gas comprising CO, CO | 03-12-2015 |
| 20150135900 | METHOD AND SYSTEM FOR OPERATING A BLAST FURNACE WITH TOP-GAS RECYCLE AND A FIRED TUBULAR HEATER - A blast furnace system is used wherein the coke rate is decreased by recycling upgraded top gas from the furnace back into its shaft section (which upgraded top gas is heated in a tubular heater prior to being recycled). The top gas, comprising CO, CO | 05-21-2015 |
| 20160160303 | EXHAUST GAS TREATMENT METHOD AND EXHAUST GAS TREATMENT FACILITY - An exhaust gas treatment method includes: burning a combustible component in exhaust gas by causing the exhaust gas, which is produced in an electric furnace, to flow into a slag holding furnace and supplying oxygen-containing gas into the slag holding furnace; causing the burned exhaust gas to flow from the slag holding furnace to a suction device through an exhaust gas pipe; adjusting an internal pressure of the electric furnace by introducing external air into the exhaust gas pipe through an opening portion provided in the middle of the exhaust gas pipe; and changing an area of the opening portion depending on a variation in the internal pressure of the electric furnace by using an opening area changing unit provided in the opening portion. | 06-09-2016 |
| 075472000 | Defined composition of Iron(Fe) source | 1 |
| 20100199806 | METHOD OF PRODUCING REDUCED IRON CAST, AND METHOD OF PRODUCING PIG IRON - In a method of producing a reduced iron cast, a cast of a powder which includes total iron of 40% or more and an atomic molar amount of fixed carbon of 0.7 to 1.5 times the atomic molar amount of oxygen compounded with metal oxide reduced in a carbon monoxide atmosphere at 1200° C. is reduced in a rotary hearth furnace. The method includes: producing, in an atmosphere at a maximum temperature of 1200° C. to 1420° C. at a ratio of carbon monoxide to carbon dioxide of 0.3 to 1.2 in the reduced material, a reduced iron-containing material in which a ratio of metal iron is 50 mass % or more and a ratio of carbon is 5 mass % or less; and compression-molding the reduced iron-containing material at a temperature of 500° C. to 800° C. by a roller-type mold. | 08-12-2010 |
