751 results about "Iron production" patented technology

A process for energy- and emission-optimized iron production and an installation for carrying out the process. A first partial amount of a generator gas produced in a melter gasifier is used as a first reducing gas in a first reduction zone. A second partial amount is fed to at least one further reduction zone as a second reducing gas. In addition, after CO₂ scrubbing, a partial amount of top gas removed from the first reduction zone is admixed with the generator gas after the latter leaves the melter gasifier, for cooling the generator gas.

The invention relates to a blast furnace slag heat recycle system and relative production, wherein it is formed by cooling-breaking, gas-slag heat exchanger, and left-heat boiler units; the slag outlet has cooling-braking unit which will cool the slag to the solidify point 1200-1300Deg. C, to be broken into the slag particles whose diameter is less than 100mm; the transmitter is connected to the gas-slag heat exchanger to heat the air to 700-800Deg. C; the slag will be cooled under 150Deg. C; the heated air will be transmitted to the left-heat boiler; the water of heating tube of boiler will adsorb the heat of gas, to generate the steam whose pressure at 0.3-0.4MPa and temperature at 260-350Deg. C. The invention can improve the energy recycle efficiency more than 70%, to reduce the energy consumption of steel production, reduce the consumption of cooling water, and reduce the environment pollution.

The invention discloses bacillus amyloliquefaciens JK6 and biological fertilizer and application. The serial number of strain preservation is CGMCC No. 10658 and is stored in the China general microbiological culture collection center on March 23, 2015. The bacillus amyloliquefaciens JK6 is mainly used for biological prevention and control of pseudomonas solanacearum and is provided with an iron-production carrier, a biological membrane, protease, catalase, cellulose and IAA characteristics, multiple fungal pathogens of banana wilt pathogen, litchi anthrax germs, litchi frost phytophthora pathogens, rice blast fungus, cucumber wilt pathogen and the like, and growth of lettuce plants is obviously promoted; the K6 strain can be successfully planted, and disease preventing functional genes of yndj, srfAB, fend and ituC are expressed in soil; the strain is high in reproduction speed, simple in production technology, high in adverse resistance, easy to store and favorable for industrialized production, the biological fertilizer is prepared with the strain, soil-born diseases can be prevented and controlled, growth of the plants can be promoted, and application prospect is broad.

The present invention is an apparatus and method for the direct reduction of iron oxide utilizing a rotary hearth furnace to form a high purity carbon-containing iron metal button. The hearth layer may be a refractory or a vitreous hearth layer of iron oxide, carbon, and silica compounds. Additionally, coating materials may be introduced onto the refractory or vitreous hearth layer before iron oxide ore and carbon materials are added, with the coating materials preventing attack of the molten iron on the hearth layer. The coating materials may include compounds of carbon, iron oxide, silicon oxide, magnesium oxide, and/or aluminum oxide. The coating materials may be placed as a solid or a slurry on the hearth layer and heated, which provides a protective layer onto which the iron oxide ores and carbon materials are placed. The iron oxide is reduced and forms molten globules of high purity iron and residual carbon, which remain separate from the hearth layer. An improved apparatus includes a cooling plate that is placed in close proximity with the refractory or vitreous hearth layer, cooling the molten globules to form iron metal buttons that are removed from the hearth layer. The improvements due to the present apparatus and method of operation provide high purity iron and carbon solid buttons, which are separate from slag particulates, and discharged without significant loss of iron product to the interior surfaces of the furnace.

The invention relates to a microalloying third-generation car spring flat steel and a preparing method thereof. The microalloying third-generation car spring flat steel comprises, by weight percentage, 0.48%-0.60% of C, 0.4%-0.8% of Si, 0.60%-1.00% of Mn, 0.80%-1.20% of Cr, 0.01%-0.05% of Nb, 0.0005%-0.003% of B, not larger than 0.025% of P, not larger than 0.025% of S, not larger than 0. 25% of Cu, not larger than 0.35% of Ni, not larger than 0.02% of Ti and the balance Fe. The preparing method includes the steps of blast furnace molten iron production, molten iron desulphurization, converter smelting, LF refining, RH vacuum treatment, square billet protection pouring, square billet heating, rolling, cooling bed slow cooling and fixed-size shearing. According to the microalloying third-generation car spring flat steel and the preparing method, niobium and boron microalloying and the silica content more suitable for the spring steel high elasticity ultra-low decarburization trend are adopted, the proper clean steel smelting process, rolling process and slow cooling control technology are adopted in a combined manner, and the high-end car spring flat steel having uniform texture, good hardenability, reasonably-matched comprehensive mechanicalness and good hardenability is developed.

The invention discloses a method for processing the dust containing zinc and lead in a steel plant through a closed cupola furnace, and belongs to the field of steel production. The method is characterized in that the dust containing the zinc and the lead in the steel plant serves as the main raw material, certain quantities of a reducing agent, a binder, a fusing agent and water are added, and after fully mixing, the mixed materials are pressed by a ball pressing machine into balls; after being dried or maintained, the balls are conveyed into the closed cupola furnace to be smelted, and finally spelter, lead bullion and molten iron are obtained. The method has the advantages of being high in raw material adaptability, strong in production capability, high in processing efficiency and additional value of products and the like. The spelter, the lead bullion, the molten iron, gas, slag and the like can be directly obtained through the dust containing the zinc and the lead in the steel plant, the spelter and the lead bullion can be refined further, and the additional value of the products is improved. The molten iron is preprocessed and then is cast into ingots to be sold. After being processed, the slag can serve as building materials or cement or other production raw materials. The gas can serve as gas fuel to be used in the plant. The method is very obvious in economic benefits and environmental benefits.

The invention provides steel production planning-based energy forecasting system and forecasting method. The forecasting system consists of a data acquisition network, an industrial ring network and a management network, wherein field real-time data of a measuring instrument and a programmable logic controller (PLC) is acquired through the data acquisition network, and output and consumption forecasting of an energy consumption unit in the future is realized by the energy forecasting module according to data of production plan, maintenance plan and equipment state acquired from enterprise resource planning (ERP) and manufacturing executive system (MES). The system can accurately forecast the energy output and consumption of a single unit or the whole enterprise according to the production plan, the maintenance plant and equipment state and other real time data, and provides basis for reasonable dispatching of energy of steel enterprises, thereby effectively reducing energy waste of the steel enterprises.

The invention discloses a multi-functional laminated iron production line. The multi-functional laminated steel production line comprises a cold rolled base plate unwinding device, a seam welder, two S turning roller sets, a first or/and second thin film release device, an iron sheet laminating device and a laminated iron winding machine, which are sequentially arranged in a conveying direction of metal base plates; the metal base plate from the seam welder enters the iron sheet laminating device after being tensioned and rectified, and a first thin film or/and second thin film is/are fed into an iron sheet laminating machine after rectification, so that the iron sheet laminating machine covers one surface or two surfaces of the metal base plate with the first thin film or/and the second thin film to form single-sided or double-sided laminated iron, the single-sided or double-sided laminated iron is fed into the other S turning roller set by the iron sheet laminating machine to be tensioned, and the tensioned single-sided laminated iron is wound by the laminated iron winding machine. The multi-functional laminated iron production line can produce both low-temperature bonded laminated iron and high-temperate melted laminated iron, is advanced iron laminating equipment capable of realizing efficient and continuous production, and can be well adaptive to the change of market requirement.

The invention discloses a method for carrying out direct reduction, sorting, agglomeration, smelting and ironmaking on ore and coal. Firstly, certain amount of the ore, the coal and a solvent are mixed, are placed in a rotary hearth furnace and are heated to the temperature of between 1,100 and 1,350 DEG C, are kept at the temperature for 15 to 40 minutes and are directly reduced to obtain a reduced iron material with metallizing rate of between 80 and 92 percent; the reduced iron material at high temperature of between 800 and 1,100 DEG C is directly transported into water, is cooled and is subjected to fine grinding and sorting; and the iron material after the fine grinding and sorting is subjected to drying and agglomeration by high-temperature oxygen-lost exhaust gas and finally is transported into a submerged arc furnace or other smelting equipment for carrying out slag-iron separation and molten iron production. The method has a simple process, short flow and high efficiency, needs no coke and is suitable for low-grade ore and non-blast furnace ore which is difficult to be used by the prior blast furnaces, such as oolitic hematite, ultrafine particle hematite, limonite, siderite and the like.

The invention relates to the technical field of steel production, in particular to a method for producing high-manganese wear-resistant steel plates, as well as a steel plate produced by the method. The invention discloses a method for producing high-manganese wear-resistant steel plates, which comprises the following steps of cold-rolling a hot-rolled high-manganese steel plate and obtaining a cold-rolled high-manganese steel plate. The production method has the advantages that the method is simple in steps, can fully utilize the prior equipment, reduce the production investment of enterprises, improves the properties of high-manganese steel and wear resistance, effectively increases the life span of the high-manganese steel, expands application range, and ensures that the high-manganese wear-resistant steel plates can completely replace high-manganese steel castings and high-chromium cast iron in environments of using plates. In addition, the production method reduces production pollution, protects environment, and saves resources and energy.

The invention relates to a high-temperature synthesis gas sensible heat recovery device which is characterized by comprising a radiation boiler, wherein the radiation boiler is connected with a convection boiler by a synthesis gas pipe. The invention recovers the sensible heat of the high-temperature synthesis gas from an entrained flow gasifier by using a radiation type steam generator, a gas quenching step and a convection type steam generator to generate medium-pressure or high-pressure steam, thereby increasing the thermal efficiency for the gasification of the entrained flow by more than10-15%. The device is concise and compact, has reliable operation and low investment, is a high-efficiency and energy-saving device, and can be widely used in the fields of integral gasification combination cycle power generation (IGCC), methanol and alkene production, coal-to-liquid, spongy iron production by the synthesis gas direct reduction iron-making method and the like.

The present invention relates to auxiliary iron and steel producing apparatus technology, and is especially automatic coil bearer locating apparatus and method for steel rolling production line and post-treatment line. The apparatus includes bearing seat, elevating mechanism, running mechanism, steel coil position detecting element, apparatus stroke detecting and locating control system. The present invention makes it possible to locate steel coil bogie or other conveying toll relatively to the coil accurately. The present invention is simple, smart and reliable.

The invention provides a layered dynamic regulation method for multiple energy media. The method comprises the steps that on the basis of an energy gradient utilization scheme, an energy medium layered dynamic regulation frame is built; according to the energy medium layered dynamic regulation frame, a regulation scheme of an energy subsystem is built; according to the regulation scheme of the energy subsystem, an optimization model and a corresponding solution mode which are suitable for layered dynamic regulation are built; according to the optimization model and the solution mode of layered dynamic regulation, a collaborative optimization algorithm of bionic intelligence is designed to solve the optimization model; dynamic regulation is carried out on multiple energy media according to the result obtained through solution. According to the layered dynamic regulation method for multiple energy media, a regulation strategy suitable for layered step collaborative optimization of multiple energy media is built, multi-cycle multi-target dynamic collaborative optimization of energy regulation is achieved, the optimization model is built, a differential evolution algorithm with a self-learning mechanism is designed to solve the optimization model, collaborative optimized dispatching of multiple energy media in a complex environment for steel production is achieved, and the method is good in comprehensive economical efficiency and effectiveness.

The invention discloses a recovery method of steel slag residual heat and system thereof. The system is composed of a steel slag flow distributor, a water-cooling granulation wheel, a first fluidized bed, a weigher, a vibration sieve, a hot slag particles bunker, a second fluidized bed, a dedusting device, a blower and a residual heat boiler in sequence. The method is that, pouring high-temperature liquid slag into the steel slag flow distributor, the steel slag flown out of the steel slag flow distributor falling onto the water-cooling granulation wheel and being crushed and throwing out to fall into the first fluidized bed for exchanging heat with air, hot slag particles discharged from the first fluidized bed is stored in the hot slag particles bunker after going through the weigher and the vibration sieve, and discharging when the temperature is cooled to 350 DEG by a heat exchanger of the second fluidized bed. High-temperature air discharged from the first fluidized bed and the second fluidized bed enters the residual heat boiler for exchanging heat after dedusting. The invention can reduce energy consumption in steel production, graining effect of the steel slag is good, which is benefit for following degradation of free CaO and magnetic separation of wasted steel.

The invention belongs to the metallurgy technical field and discloses a sponge iron production technology by coal gasification. The invention is characterized in that: coal and oxygen, water or steamreact in a high temperature high pressure entrained flow gasifier to generate reducing coal gas rich in CO+H2, the reducing coal gas is subject to dust removal, desulfuration and pressure and heat transformation by a gasifier discharge coal gas process system and then mixed with decarburization gas rich in CO+H2 after shaft furnace top gas passes through a return coal gas process system and a carbon dioxide separation system, and then the mixed gas is heated to the temperature range required by the shaft furnace and then fed into the shaft furnace to reduce iron ore, so as to produce sponge iron. The invention reduces high temperature high pressure entrained flow gasifier cost; the shaft furnace top gas circulating reflux is fully utilized to reduce coal use consumed in sponge iron production, and cost is saved; and CO2 is collected and recycled.

The invention discloses a recovery method of blast furnace slag water residual heat and method thereof. The recovery system of resudual heat includes a blast furnace slag system, a sedimentation tank, a hydrocyclone separator, a water pump, a heat exchanger, a steam turbine, a refrigerant condenser, a refrigerant pump. The recovery method is that applying bicirculating low temperature hot water generation system to recovery residual heat and penerating power. The specific process is: guiding the blast furnace slag water into the heat exchanger after preprocessing of impurity precipitation and transmitting heat to low boiling refrigerant; the low boiling refrigerant absorbing heat in the heat exchanger and entering the steam turbine for expansion of doing work; the refrigerant after doing wirk changing into low-pressure superheated steam, the low-pressure superheated steam entering the concenser to releast heat and changing into liquid refrigerant of low-temperature and low-pressure, then being sent to the heat exchanger by the refrigerant pump for absorbing heat, becoming the superheated steam again to push the steam turbine to do work. The invention can recovery residual heat of the blast furnace slag water and generate power, and reduce energy consumption in steel production; and reduce temperature of blast furnace slag water which is benefit to improve quality of blast furnace water slag and reduce discharge of sulphide in slag washing process.

The invention discloses 980MPa-grade automobile cold-rolled high-strength Q&P steel and a production method thereof, and belongs to the technical field of steel production. The Q&P steel comprises thefollowing components, by weight percentage: 0.18-0.24% of C, 0.60-1.30% of Si, 1.60-2.40% of Mn, 0.02-0.04% of P, less than or equal to 0.005% of S, 0.040-0.070% of Nb, less than or equal to 0.0060%of N, 0.50-1.0% of Als and the balance of Fe and inevitable impurities. The production method comprises the steps of carrying out steel-making, carrying out heating, carrying out hot rolling, carryingout cold rolling, carrying out continuous annealing and carrying out leveling, wherein the holding temperature of a soaking zone in the continuous annealing process is 770-840 DEG C, and the holdingtemperature of an overaging zone is 300-440 DEG C. The obtained Q&P steel has the advantages that the mechanical property is excellent, the yield strength is greater than or equal to 550MPa, the tensile strength is greater than or equal to 980MPa, the elongation percentage is greater than or equal to 18%, and the cold forming property is good.

The invention provides an iron and steel enterprise production scheduling management system and a production scheduling management method, which is applied to plan formulation and real-time scheduling in the production process of iron and steel enterprises. The iron and steel enterprise production scheduling management system comprises a database server, an application server, a client and a real-time monitoring system. The production scheduling management method comprises plan formation, dynamic monitoring and real-time scheduling. The advantages lie in that production plan automatic formation and real-time scheduling are integrated, a problem that front and back working procedures are difficult to be coordinated in dynamic scheduling is solved, and the system and the method are applicable to iron and steel production enterprises with a characteristic of fixed flow.

The invention discloses a method for comprehensive wastewater desalination and zero release in steel production, belonging to the technical field of wastewater desalination and zero release. The method comprises the following steps of: introducing wastewater to a regulating pond through a fence, wherein the regulating pond is provided with a deoiling device; deoiling the wastewater; then introducing the wastewater into a lime softening flocculation precipitation system; enabling a supernatant to be subjected to neutralization, sand filtration, chlorination, multi-medium filtration and then introducing into a micro-filtration system, a cartridge filter and a primary reverse osmosis system; introducing primary reverse osmosis strong brine to a lime sodium carbonate softening system, the cartridge filter and a secondary reverse osmosis system; introducing secondary reverse osmosis strong brine for steelmaking and slag stewing so as to achieve zero release; and returning primary reverse osmosis demineralized water and secondary reverse osmosis demineralized water to the steel production process for application. The method has the advantages that a film is not blocked easily and the service life of equipment is long because the micro-filtration system, the primary reverse osmosis system, the resin softening system, the cartridge filter and the secondary reverse osmosis system are utilized. The primary reverse osmosis strong brine is introduced to the lime sodium carbonate softening system, the cartridge filter and the secondary reverse osmosis system; and the secondary reverse osmosis strong brine is introduced for steelmaking and slag stewing so as to achieve zero release of the wastewater.