770 results about "Bloomery" patented technology

The invention provides a blast furnace slag alkalinity intelligent adjusting method based on big data, and belongs to the technical field of intelligent manufacturing, the method comprises the following steps: collecting blast furnace historical production data, determining production key parameters according to the historical production data, and generating a theoretical calculation model of blast furnace slag alkalinity; the method comprises the following steps: determining slag alkalinity related target parameters in combination with a process principle, screening the related target parameters to obtain strong correlation parameters, and constructing a prediction model; performing state evaluation on the blast furnace slag iron based on the prediction result to obtain a state evaluation result, and determining the adjustment direction and the adjustment step length of the slag alkalinity according to the state evaluation result; based on a theoretical calculation model and current furnace charge data, the material adjustment amount is determined by combining the adjustment direction and the adjustment step length of the slag alkalinity, the slag alkalinity is intelligently adjusted one smelting period ahead of time, efficient and accurate slag alkalinity control is achieved, manual intervention is reduced, the operation process is optimized, the alkalinity is kept within the optimal range, and the reject ratio is reduced.

The invention provides a smelting method for improving the stability of a blast furnace under the condition of high gas utilization rate, which comprises the following steps: step 1, using a bell-less furnace top, and preparing charging materials in a tank combination manner, the charging materials comprising coke and ore; step 2, annularly distributing the coke and the ore at a preset angle position in the blast furnace by adopting a simultaneous loading and distributing method; and step 3, keeping the gas utilization rate at 48-54.0%, carrying out blast furnace smelting, dynamically adjusting the oxygen enrichment amount and the coal injection amount of the blast furnace according to the furnace building condition, dynamically adjusting the fuel ratio or the air volume of the blast furnace according to the gas utilization rate decreasing condition, and dynamically adjusting the coal injection amount or the clean coke of the blast furnace according to the stockline decreasing condition. By accurately controlling the ore coke distribution gradient, forming a coal gas flow structure with heavy loads on the edge and an open center, the pressure difference in the furnace can be stabilized through linkage adjustment of the oxygen enrichment amount and the coal injection amount, the fuel ratio / air volume dynamically adjusts and compensates a heat notch, furnace temperature fluctuation is avoided, and the activity of the hearth is rapidly recovered according to the stockline abnormity, the coal injection or net coke supplement strategy.

The invention discloses a method for low-carbon preparation of a high-reactivity blast furnace burden from magnetite concentrate and the blast furnace burden, and belongs to the technical field of ferrous metallurgy. According to the method, an iron-containing raw material, an organic-inorganic composite binder, a multifunctional additive and water are sequentially subjected to uniform mixing, high-pressure double-roller forming and consolidation, and the finished product cold pressing block is obtained. According to the method, the strength and reducibility of the cold pressing block can be remarkably improved by optimizing the particle size composition of the raw materials and adding the multifunctional additive, the technological process is simple, a high-temperature process is not needed, and carbon emission is low.

The invention relates to a multi-electrode direct-current electric arc furnace, a submerged arc furnace power supply device and a smelting method, belongs to the technical field of industrial smelting, and aims to solve the problem of working condition of abnormal conductivity of furnace charge of the multi-electrode direct-current furnace. The device is composed of a phase-shifting transformer, a rectification module, a direct current conversion module, an isolation switch and other components, and all the components are connected according to a specific rule, so that a top electrode attribute conversion loop is formed in the device topology. By matching with the smelting method, cathode and anode attribute transformation of the multi-electrode direct current furnace top electrode can be realized, smelting can be performed through a top electrode loop under complex conditions of poor furnace charge conductivity and the like, and a normal production process can be recovered after a molten pool in the furnace appears and the furnace charge conductivity is enhanced, so that the abnormal fault processing time is shortened, and the production efficiency is improved. And the smelting efficiency of industrial smelting, especially in the fields of iron alloys and special steel, is improved.

The invention relates to the technical field of blast furnace smelting, and discloses a method, device and equipment for determining the position of a blast furnace soft melting zone and a storage medium, and the method comprises the following steps: carrying out charge level scanning based on a material distribution starting signal and a material distribution ending signal of current material distribution to obtain a charge level coordinate and a charge discharging speed; determining a first boundary condition based on the furnace charge level coordinates and the blast furnace characteristics, and constructing an initial grid structure; the initial grid structure is updated based on the furnace charge level coordinates and the furnace charge discharging speed, and a target grid structure is obtained; enabling the blast furnace burden to react, obtaining the distribution condition of each grid unit in the target grid structure under the condition that a plurality of burden performance parameters of each grid node in the target grid structure converge, and generating a temperature field distribution diagram; and determining the position of the soft melting zone of the blast furnace based on the plurality of furnace charge performance parameters and the temperature field distribution diagram corresponding to each grid node in the target grid structure. According to the method, the accuracy of determining the position of the soft melting zone is improved, and dynamic changes in the blast furnace are reflected.

The invention provides a metallurgical chemical solid waste pretreatment vertical electric heating roasting furnace device and a using method thereof.The furnace body is of a hollow cylindrical vertical structure, a barrel is divided into a solid reduction area, an oxidation reduction area and a furnace charge preheating area, the barrel of the solid reduction area and the barrel of the oxidation reduction area are surrounded by flat rectangular red copper pipes, and an auxiliary induction bar is arranged in the center of the barrel; and the feeding and discharging device is connected to the PLC automatic control module. The power supply control and heat supply device is connected with the red copper pipe through a silicon controlled rectifier medium-frequency power supply, and an air supply and exhaust device, a temperature control device and a sealing device are additionally arranged. Fossil fuel is replaced by electric heating, carbon emission is reduced, environmental protection is achieved, temperature control is accurate, heat efficiency is high, and energy consumption and cost can be saved. One set of equipment is suitable for different solid waste raw materials, pretreated products are obtained through different roasting methods, the equipment is simple, investment is saved, the technological process is short, applicability is high, heating is even through the structural design, sealing is good, continuous production can be achieved, and heat efficiency and production efficiency are improved.

The invention discloses a preparation method of an iron-containing furnace charge for a blast furnace. The method comprises the following steps: uniformly mixing an iron-containing raw material with a bonde-1 (containing an organic polymer binder, an active calcium-based substance and an active iron-based substance), then adding a bonde-2 (containing silica sol and water glass) and water, and further uniformly mixing to obtain a mixture; carrying out compression molding on the mixture to obtain a wet block mass; and drying and solidifying the wet block mass to obtain the iron-containing furnace charge. According to the method, by using the special multifunctional binder, efficient forming, rapid consolidation and clean low-carbon preparation of the blast furnace burden from the iron-containing burden can be achieved, the obtained blast furnace burden meets the performance requirements of the blast furnace burden, and the method has important practical significance for achieving the double-carbon strategy in the iron and steel industry.

The invention provides a nodular cast iron material and a preparation method and application thereof. The preparation method of the nodular cast iron material comprises the following steps that S1, a mixture of pig iron, low-manganese waste steel and foundry returns is heated to be completely molten, alloy and auxiliary materials are supplemented and adjusted to target components, and base iron is obtained; s2, a spheroidizing agent is added into the base iron to conduct spheroidizing treatment, ladle-to-ladle inoculation is conducted after spheroidizing treatment, and an efficient inoculant is added during ladle-to-ladle inoculation; s3, pouring is conducted, and during pouring, a long-acting stream inoculant is added for instantaneous inoculation; and S4, carrying out vibration aging treatment to obtain the nodular cast iron material. According to the nodular cast iron material, collaborative upgrading is achieved in the three dimensions of graphite form-matrix strength-thermal stress dissipation, in a bench test, the number of hot cracks is greatly increased, the service life is obviously prolonged, and reliable guarantee is provided for braking safety of heavy vehicles.

The invention discloses a method for preparing reduced iron through low-carbon agglomeration-hydrogen reduction of an iron-containing raw material, and belongs to the technical field of ferrous metallurgy. The method comprises the following steps: uniformly mixing an iron-containing raw material with a composite binder and water to obtain a mixture; the mixture is sequentially subjected to homogenization treatment, high-pressure forming and drying solidification, and cold-pressed pellets are obtained; and the cold-pressed pellets are subjected to hydrogen reduction, and metallized pellets are obtained. The method can be used at a lower temperature (lt; according to the method, the furnace burden suitable for direct hydrogen reduction of the shaft furnace is prepared at the temperature of 300 DEG C, the metallized pellets are obtained through further direct hydrogen reduction, the technological process is short, the carbon emission in the reduction process is greatly reduced through hydrogen reduction, and the obtained metallized pellets can be used for different scenes such as converter steelmaking and electric furnace steelmaking according to different qualities.

The present invention belongs to the technical field of blast furnace smelting and relates to an iron-making method and system based on coupled blowing of CO2-containing coal gas and biomass. The system of the present invention comprises: a material basic data storage and processing module; a material balance and heat balance measurement and calculation module; a biomass addition amount calculation module; a material basic parameter input module; a metallurgical process parameter input module; a smelting parameter constraint interval input module; and a low-carbon smelting parameter output module. A measurement and calculation method according to the present invention is based on the material balance and heat balance. On the premise that CO2-containing coal gas is blown in a blast furnace, the required blowing amount of the biomass and the corresponding coke ratio and coal ratio are calculated on the basis of the heat difference, and low-carbon smelting in the blast furnace is realized. The system and method can guide the blowing of CO2-containing coal gas in the blast furnace and determine the biomass addition amount; in addition, process parameters satisfying low-carbon smelting in the blast furnace can be obtained at any time according to the types and compositions of a fuel, a furnace burden, the CO2-containing coal gas, and the biomass, and compared with original smelting conditions, the purpose of reducing the fuel ratio can be achieved.

The invention relates to a smelting method of ultra-low carbon automobile steel capable of reducing carbon emission, which comprises the following steps of: carrying out converter blowing on semi-steel obtained by mixing electric furnace molten steel accounting for 30wt%-70wt% of the total amount and blast furnace molten iron accounting for 70wt%-30wt% of the total amount, and the converter blowing comprises the steps of molten iron pretreatment, converter smelting, LF (ladle furnace) refining, RH (relative humidity) operation and continuous casting. The method has the beneficial effects that (1) the mixed semisteel of the electric furnace molten steel and the blast furnace molten iron is adopted for converter blowing, so that a heat source required by converter smelting is ensured, and carbon emission generated in the blowing process can be effectively reduced; 2) the semisteel process reduces the carbon content of the material entering the converter, and effectively reduces the discharge amount of oxycarbide; and (3) the non-metallic inclusions and the performance of the finished product meet the requirements of ultra-low carbon automobile steel products.

The utility model relates to a blast furnace distribution chute in the technical field of metallurgical ironmaking, which comprises a chute body, a plurality of transverse ribs and a plurality of longitudinal ribs are arranged on the inner wall of the chute body; wear-resistant lining plates are arranged on the transverse ribs and the longitudinal ribs in a matched manner; the blast furnace material distribution chute is safe and reliable to use, furnace charge is prevented from directly erosive wear on the chute, the firmness and wear resistance of the blast furnace material distribution chute are improved, the service life is prolonged, and the production cost is reduced.

The invention relates to the field of metal material casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT800-5, which comprises the following steps: preparing pig iron, waste steel and foundry returns, and using auxiliary materials such as a silicon carbide pretreating agent, a high-temperature graphitization carburant, a rare earth magnesium silicon iron nodulizing agent, a silicon barium nucleating agent and a silicon strontium nucleating agent to prepare the green sand as-cast high-plasticity nodular cast iron QT800-5. The purity and component stability of molten iron are ensured; in the smelting process, purification and adjustment are carried out through temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microscopic structure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation; the final casting has excellent mechanical properties including the tensile strength larger than or equal to 800 MPa, the yield strength larger than or equal to 480 MPa, the elongation larger than or equal to 5% and the matrix pearlite content larger than or equal to 80%. The production process disclosed by the invention is simplified, is suitable for large-scale industrial production, and has a wide application prospect in lightweight application requiring high-strength and high-plasticity materials.

The invention relates to the technical field of metallurgical furnace charge conveying and control, and discloses a top-blown furnace multi-channel supersonic jet type feeding control method and system.The method comprises the steps that flow distribution in a nozzle is achieved through a piezoelectric ceramic high-speed valve installed at a pipeline inlet, and a nozzle servo motor is controlled at the top of a spray gun to adjust the spray angle of the spray gun; the feeding speed, pressure and temperature are monitored in real time through a pressure sensor and a flow sensor arranged in an inlet area of the pipeline and an infrared thermometer mounted at the top of the furnace; the carrier gas flow, the nozzle opening degree and the spraying angle are dynamically adjusted through control of the PLC executing mechanism, and collaborative optimization of the material flow vector, the flow field in the hearth and the heat and mass transfer process is achieved. The system comprises a spray gun, a piezoelectric ceramic high-speed valve, a flow sensor, an infrared thermometer, a nozzle control servo motor, a temperature measurement control small servo motor and a control room. The comprehensive operation efficiency of energy density distribution optimization, reaction efficiency improvement and energy consumption index reduction of the molten pool reactor is finally realized.

The present invention relates to an ironmaking method and system coupling CO2-containing gas with biomass injection, belonging to the technical field of blast furnace smelting. The system of the present invention includes a material basic data storage and processing module; a material balance and heat balance calculation module; a biomass addition amount calculation module; a material basic parameter input module; a metallurgical process parameter input module; a smelting parameter constraint range input module; and a low-carbon smelting parameter output module. The calculation method disclosed by the present invention is based on the material balance and heat balance. On the premise of injecting CO2-containing gas into the blast furnace, the injection amount of the required biomass, as well as the corresponding coke ratio and coal ratio, are obtained through heat difference calculation, realizing low-carbon smelting of the blast furnace. The system and method can guide the injection of CO2-containing gas into the blast furnace and determine the biomass addition amount; the process parameters for meeting the low-carbon smelting of the blast furnace can be obtained at any time according to the types and components of fuels, burden materials, CO2-containing gas, and biomass, and compared with the original smelting conditions, the purpose of reducing the fuel ratio can be achieved.

The invention belongs to the technical field of alloy smelting, and particularly relates to a method for producing high-carbon ferro-chrome by using coal instead of a traditional reducing agent in an ultrahigh proportion, and the method for producing the high-carbon ferro-chrome comprises the following steps: pretreating chromium ore to obtain a chromium raw material, and mixing silica and lime to obtain a solvent; mixing a chromium raw material, a reducing agent and a solvent to obtain a furnace charge; charging the furnace charge into a submerged arc furnace, starting the furnace by using an arc striking electrode, and rapidly starting arc and heating to promote the furnace charge to be preliminarily melted; and after the furnace burden is molten, the temperature in the furnace is maintained to be 1700-1800 K, and the reaction time is 2-3 h. According to the method, the reducing agent is prepared from the high-proportion low-phosphorus and low-sulfur carbonaceous components, the smelting temperature and the content of SiO2 in the slag are regulated and controlled, the content of Cr and the content of C in the high-carbon ferrochrome can be effectively increased, the use amount of the coke reducing agent is greatly reduced, and the problems that in the prior art, the cost of the coke reducing agent is high, and the reducibility is low are solved.

The invention discloses boron-containing high-chromium cast iron and an intermediate frequency furnace for machining, and relates to the technical field of intermediate frequency furnaces. A plurality of air supply holes are evenly formed in the other side of an arc-shaped air box, the air outlet end of an exhaust fan is connected to one ends of two air supply pipes, the other ends of the two air supply pipes are connected with one sides of the two arc-shaped air boxes correspondingly, and a lifting cylinder is installed on the other side of a protective cylinder; the output end of the lifting cylinder is connected with a supporting suspension frame, the top end of the supporting suspension frame is connected with a material storage barrel, and a plurality of air inlet holes are evenly formed in the two sides of the material storage barrel. Filtered waste smoke flows through the air supply pipe, enters the arc-shaped air box and then enters the material storage barrel, and the filtered high-temperature waste smoke dries metal furnace burden in the material storage barrel; heat contained in waste smoke is effectively utilized, furnace charge is added into the storage barrel in advance, the dried furnace charge in the storage barrel can be quickly fed into the smelting furnace during next feeding, the intermediate waiting time is short, and the production efficiency is high.

The invention relates to the technical field of blast furnace smelting, and particularly discloses a blast furnace charge can charging method which comprises the following steps: analyzing the furnace top gas temperature and the charge descending speed of a blast furnace, analyzing the balance state of the gas temperature relative value and the descending speed relative value, and calculating to obtain a coal heat balance value; analyzing and judging the adjustment conditions of the charging speed and the coke load; on the basis of the obtained coal heat balance value, calculating and analyzing the specific adjustment process of the charging speed and the coke load; based on the obtained coal heat balance value, performing comprehensive analysis on an abnormal temperature gradient obtained from a temperature gradient change curve in the furnace, and performing optimization adjustment on the charging speed and the coke load; and based on the optimized charging speed and coke load, the blast furnace molten iron temperature is analyzed, an optimized compensation speed and an optimized compensation load are obtained through calculation, and the charging speed and the coke load are subjected to optimized compensation adjustment.

This invention discloses a method for preparing high-reactivity blast furnace charge from magnetite concentrate with low carbon content, and the blast furnace charge itself, belonging to the field of iron and steel metallurgical technology. The method involves sequentially mixing iron-containing raw materials with an organic-inorganic composite binder, multifunctional additives, and water, followed by high-pressure roller molding and solidification to obtain the finished cold-pressed briquettes. By optimizing the particle size distribution of the raw materials and adding multifunctional additives, this method can significantly improve the strength and reducibility of the cold-pressed briquettes. The process is simple, requires no high-temperature treatment, and has low carbon emissions.

The invention discloses nodular cast iron and a production process, and relates to the technical field of nodular cast iron preparation. The invention discloses a nodular cast iron production process. Carbon steel scrap and recirculated iron are used as main furnace materials for smelting, a spheroidizing agent and a first nucleating agent are added for a spheroidizing reaction, pouring is conducted, stream secondary inoculation is conducted, solidification cooling and heat treatment are conducted, and a casting is formed. The process route of the nodular cast iron production process is different from that of a foreign high-silicon solid solution strengthening process route for improving the elongation rate, pig iron is not adopted, only waste steel and recirculated iron are used as main raw materials, and the prepared nodular cast iron meets the requirements of casting products for high strength and high elongation rate of nodular cast iron at the same time; and no precious alloy is added in the production process, so that the production cost is greatly reduced, and the economic benefit is remarkably improved.

The invention relates to a method for adding damping-down materials before long-term damping-down of a blast furnace. The damping-down materials comprise light-load materials and empty coke. The load of the light-load material can be reduced progressively according to the smooth running condition of the blast furnace before damping down, or the load of the furnace material before damping down is maintained. The adding amount of each batch of empty coke is 1.0-1.5 times of that of the coke batch before damping down. The loaded empty coke is completely composed of dry quenching coke with reasonable indexes. When empty coke is added, the flux dosage is not additionally increased any more. And the first batch of empty coke is loaded at the middle position of the furnace bosh. The second batch of empty coke is loaded in the middle of the furnace bosh, the third batch of empty coke is loaded in the lower part of the furnace body, and the fourth batch of empty coke is loaded in the middle of the furnace body. According to the invention, the addition of empty coke is reduced, the recovery of hearth heat is promoted, and the fuel ratio of the blast furnace is reduced.

The utility model discloses a submerged arc furnace cover capable of reducing magnetic field interference, which comprises a cover body, a plurality of groups of annularly distributed grounding plates are arranged on the cover body, a mounting frame is arranged on the cover body, a mounting rod is arranged in the mounting frame, a valve plate is sleeved on the mounting rod, the valve plate is movably clamped with the cover body, and the valve plate is connected with the cover body. The mounting rod is sleeved with a compression spring, an adjusting plate is sleeved with the mounting rod, a threaded rod is arranged in the mounting rod, the mounting frame is sleeved with a splash guard, the cover body is sleeved with a cooling water pipe, and the arranged valve plate is matched with the compression spring, the threaded rod and the adjusting rod to achieve overpressure protection of the furnace cover. Safety accidents such as damage to the furnace cover or the furnace body caused by too high pressure in the furnace body are avoided, protection of splashing of furnace charge in the furnace cover is achieved through the arranged splash-proof cover, and the furnace charge is prevented from splashing out to damage equipment or injure workers in the opening process of the valve clack.

The invention relates to the field of casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT450-18, which comprises the following steps of: preparing pig iron, waste steel and foundry returns according to a certain proportion, and preparing the green sand as-cast high-plasticity nodular cast iron QT450-18 by using auxiliary materials such as a silicon carbide pretreatment agent, a high-temperature graphitization carburant, a rare-earth magnesium silicon iron nodulizer, a silicon barium inoculant and a silicon strontium inoculant. And purity and component stability of molten iron are ensured. In the smelting process, purification and adjustment are carried out through accurate temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microstructure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation. The final casting has excellent mechanical properties, including tensile strength greater than or equal to 440 MPa, yield strength greater than or equal to 300 MPa, elongation greater than or equal to 16%, and V-shaped notch normal temperature impact absorption energy greater than or equal to 8 J. The method is simple and convenient to operate, high in production efficiency and suitable for large-scale industrial production.

The invention belongs to the field of industrial silicon submerged arc furnace smelting, and provides a closed industrial silicon submerged arc furnace which comprises a submerged arc furnace body, a supporting platform is arranged above the furnace body, and a discharging uniform distribution device, a flue gas emission system, an electrode operation system, a feed system and a two-dimensional space movement furnace ramming device are arranged above the supporting platform. A water-cooling closed smoke hood is fixed below the supporting platform, a furnace charge preheating device is arranged at the top end in the water-cooling closed smoke hood, a three-dimensional space movement furnace ramming device, an electrode operation visible system and an explosion-proof device are arranged on the side part of the water-cooling closed smoke hood, and an oxygen blowing refining device and a continuous silicon discharging device are arranged on the side part of the furnace body; and a furnace body rotating system is also arranged at the bottom of the furnace body. The problems that the industrial silicon submerged arc furnace is high in energy consumption, large in emission, low in efficiency and the like in the smelting operation process are solved, and the beneficial effects of low consumption, less emission, zero emission and the like are achieved.

The invention relates to a process method for inhibiting ring formation of a zinc removal rotary kiln. The process method comprises the following steps: S1, optimizing an ingredient structure: strictly controlling the moisture of a material entering a furnace to be 20-25%, controlling the carbon content to be 1500-1700 kilocalories and controlling the particle size to be 3-8 mm; s2, optimizing a roasting process: sequentially dividing the rotary kiln into a drying section, a preheating section, a high-temperature section and a cooling section from the kiln head to the kiln tail by adopting a segmented roasting technology; wherein the temperature of the high-temperature section is controlled to be 1150-1250 DEG C, the whole calcination time is controlled to be 90-110 min, and the furnace charge filling rate is controlled to be 14-16%; s3, auxiliary equipment is additionally arranged, specifically, a barrel temperature scanner and a pressure detection device are installed on the rotary kiln, the temperature and pressure in the kiln are monitored in real time, and technological parameters are adjusted according to detection data; and S4, initial ring formation removal. By means of optimizing the batching structure, improving the roasting process, additionally arranging auxiliary equipment and the like, stable and continuous operation of the rotary kiln can be achieved, and the operation rate of the rotary kiln is improved.

The invention relates to the field of metallurgy, and provides an efficient titanium slag smelting method which comprises the following steps: controlling the total charging quantity of titanium concentrate in a single furnace according to the effective volume and rated power supply power of an electric furnace, blanking according to a fixed feeding speed, and calculating the total charging quantity of a reducing agent in the single furnace based on the total charging quantity of the titanium concentrate in the single furnace, blanking is carried out according to the feeding speed from high to low; the titanium concentrate and a reducing agent are conveyed into a smelting furnace to be subjected to continuous micro-negative-pressure smelting, first-time deslagging operation is carried out, a first part of titanium slag is obtained, and electrification is maintained; and when the total iron content of the first part of titanium slag is reduced to an expected value, electrifying is stopped, secondary slag tapping and iron tapping operation are carried out, and a second part of titanium slag and low-carbon molten iron are obtained. According to the method, on the premise that the unit furnace burden reducing agent adding amount and the unit power supply power are not changed, the furnace feeding system and the corresponding power supply power of the reducing agent are adjusted, so that the high-and-low carbon adding system and the low-and-low power supply system are formed, and the smelting efficiency in the titanium slag smelting process is effectively improved.

Disclosed herein, in some aspects, are systems and methods for producing a material comprising iron through self-reduction of iron ore using bio-oil and / or other reducing agents (e.g., bio-based reducing agents), such as biocrude, ethanol, or other bio-based liquids or biologically sourced liquids. The bio-oil and / or other reducing agents can be mixed with the iron ore to form a furnace mixture, which can be heated, such that the components of the bio-oil and / or other reducing agents in the furnace mixture reduce the iron ore to form an iron product (e.g., a material that includes metallic iron). In some cases, the pre-formed furnace mixture allows for the reducing agents to interact with the iron more readily, thereby providing for quicker reaction rates, and thereby quicker reduction of iron ore, as compared to direct reduction iron production.

The invention relates to the technical field of smelting additives, and discloses a preparation method of red mud cold-pressed pellets, which comprises the following steps: S1, raw material preparation: firstly, putting a raw material Bayer process red mud to be treated at a specified position so as to be conveniently treated by subsequent workers; a worker can adopt a manual pouring mode and can also adopt mechanical equipment to pour the materials into the stock bin (1). Compared with the prior art, the method has the following advantages and effects that the Bayer process red mud has large dispersity and is not prone to coalescence, red mud particles can be firmly bonded together by spraying the red mud cold-pressed pellet adhesive, the plasticity and the forming effect of the pellets are remarkably improved, the compressive strength and the wear resistance of the pellets are remarkably improved, and meanwhile the service life of the pellets is prolonged. After the adhesive is added, the pellet forming effect is very stable, the energy consumption is reduced, the production efficiency is improved, in addition, the pellet granularity is uniform, the wet pellet falling strength is more than 1.5 m < 2 > times and is complete, the dry pellet compressive strength reaches more than 100 kg, the cold strength is good, and the furnace burden requirement can be met.

The invention relates to the field of ultra-high-temperature smelting furnace temperature control systems, and discloses an ultra-high-temperature smelting furnace temperature control system based on a modular thermal field, which comprises a smelting furnace body used for accommodating raw materials and providing an ultra-high-temperature reaction environment of 1800-2200 DEG C; the modularized thermal field unit is fixed on the inner side of the smelting furnace body and comprises a plurality of standardized and interchangeable thermal field modules, and a lining of each thermal field module is made of a gradient composite ultra-high-temperature ceramic refractory material; the intelligent temperature control system comprises high temperature sensor modules which are arranged in all thermotechnical areas and used for collecting temperature, current and furnace charge data in real time; a data acquisition and preprocessing module, a machine learning control module and an execution module; a fail-safe module; and a man-machine interaction module. Compared with the prior art, the system has the advantages that through combination of modular thermal field design, gradient composite refractory materials, machine learning intelligent control and multi-physical field simulation, accurate, stable, efficient and safe control over the high-temperature smelting process is achieved.

The invention relates to a preparation technology and a use method of a wear-resistant steel ball for a large semi-autogenous mill, which are characterized in that a scrapped car shell, a scrapped cold roll and waste silicon carbide are used as main furnace charges to smelt molten steel in an electric furnace, and a small amount of aluminum-silicon-calcium alloy, rare earth magnesium-silicon-iron alloy and nano TiC are added to improve the quality of the molten steel. Molten steel is directly poured into a square billet on a square billet continuous casting machine, after the continuous casting square billet is rolled and forged, forging waste heat water cooling short-time quenching and isothermal quenching composite heat treatment is adopted, the wear-resistant steel ball with excellent obdurability and wear resistance is obtained, the phenomena of cracking, stripping and out-of-round do not occur when the wear-resistant steel ball is used on a large semi-autogenous mill, wear is low, and the service life of the wear-resistant steel ball is prolonged. And the production efficiency of the large semi-autogenous mill can be remarkably improved, the ore grinding cost is reduced, and remarkable economic and social benefits are achieved in application and popularization.