40 results about "Steel company" patented technology

The invention discloses a synchronous control method for two independent motor drive type steel conveying chains. The method comprises driving type steel conveying chain synchronous control and driven type steel conveying chain synchronous control, according to the driving type steel conveying chain synchronous control and the driven type steel conveying chain synchronous control, retreating terminal position values of a main conveying chain and a slave conveying chain are 0 mm, and given position values and actual position values of the main conveying chain and the slave conveying chain are positive values or zero. The driving type steel conveying chain synchronous control comprises a driving type steel conveying chain synchronous position over-tolerance judging unit, a driving type steel conveying chain automatic linkage transmission enabling control unit, a driving type steel conveying chain automatic linkage speed given control unit, a driving type steel conveying chain manual linkage transmission enabling and speed given control unit and a driving type steel conveying chain single-action transmission enabling and speed given control unit. The control method is used in two-section conveying chains of a large H-shaped steel CP9 stacking machine tool of the Maanshan Iron and Steel Company, and has good effect.

The invention discloses a method of coking benzene deep desulfurizing refined method, which comprises the following steps: adopting catalytic alkylthiophene desulfuration and selective adsorption desulfurizing associated craft; generating alkylthiophene with higher boiling point; rebuilding alkylthiophene through rectifying abscission; selective-adsorbing with desulfurizer; stripping excess un-reaction thiophene; reaching the demand of deep purifying harmful sulfur impurities in coking benzene. This invention possesses small corrosion, low cost and high earning rate, which is a better method for deep processing by-product of steel company and coking plant.

The invention belongs to a manufacture technique of calcining cement clinker, in particular to a process of calcining cement clinker using coal gas as the heat source in rotary kiln. The manufacture technique includes a process of voltage stabilization and transformation of the coal gas, and a process of burning and heat calcinations of the coal gas in the rotary kiln. The invention is characterized in that the coal gas enters a burner through the coal gas pipe after the voltage is stabilized by a voltage stabilization cabinet and the flow capacity is adjusted by a control valve, then the coal gas is lit by the coal burner and sprayed in the rotary kiln. The coke-oven gas, blast furnace gas, converter gas and high coke mixed gas left in the process of metallurgy production can take place coal powder as fuel to calcine the cement clinker. The invention has the advantages that the manufacture technique can reduce environmental pollution caused by burning coal, increase the utilization ratio of the surplus gas in iron and steel companies, and reduce the exhaust of coal gas, thereby having good economic benefit and social benefit.

The present invention discloses a solid inhibitor addition based method for collaborative emission reduction of SO2 and dioxins in sintering process, and belongs to the technical field emissions of pollutants reduction in the sintering process. The present invention comprises the steps of: step 1, sintering cloth (A) paving a pavement material layer on the upper part of a sintering trolley, (B) paving a first mixture layer on the top of the pavement material layer, (C) mixing solid ammonia inhibitor granules with a sinter mixture, and paving a collaborative emission reduction material layer over the first mixture layer, and (D) paving a second mixture layer over the collaborative emission reduction material layer; and step 2, flue concentrated collection and treatment: emerging the flue gas in a bellows at the middle rear part of the sintering trolley into a bag dust remover by a booster pump, and introducing the flue gas after dust removal into a main flue collector by a pipe. Through addition of urea granules in the collaborative emission reduction material layer, the method achieves collaborative emission reduction of SO2 and dioxins in the sintering process on the premise of unchanged sinter quality, and greatly reduces the emission reduction burden of steel companies.

Provided is a method of using surplus gas of iron and steel production to produce cement in a predecomposition furnace of a rotary kiln, belonging to the technical field of calcining cement clinker and including a process of voltage stabilization and transformation of coal gas, a process of burnt and heat calcinations of the coal gas in the predecomposition furnace. The coal gas is burnt sufficiently and used in the predecomposition process of the cement raw meal. The coke-oven gas, blast furnace gas, converter gas and high coke mixed gas left in the process of metallurgy production can take place coal powder as fuel to decompose carbonate in the cement raw meal. The invention has the advantages that the manufacture technique can reduce environmental pollution caused by burning coal, increase the utilization ratio of the surplus gas in iron and steel companies, and reduce the exhaust of coal gas, thereby having good economic benefit and social benefit.

The invention relates to a process for recycling zinc and producing molten iron by using iron-containing zinc dust. The process is characterized by comprising the following steps: S1, uniformly mixing iron-zinc dust, iron ore powder and additives in a mixing machine, feeding the mixture into a sintering machine to be sintered, crushing and screening the sintered ore, and subsequently feeding into a furnace; S2, uniformly mixing grinded powder coal with an adhesive, and pressing into shaped coal; S3, feeding the sintered ore and the shaped coal into a blast furnace so as to react the sintered ore and the shaped coal in the blast furnace to generate molten iron and zinc vapor, and discharging out the zinc vapor along with dust and coal gas from the blast furnace; S4, primarily removing the dust of the coal gas with the zinc vapor, and subsequently feeding into a heat exchanger to exchange the heat; S5, feeding the coal gas after heat exchange into a fine dust remover to remove the dust so as to obtain gas mud, and feeding the gas mud into a settling pond to be filtered, settled and thickened; and S6, drying the thickened gas mud so as to obtain powder rich in zinc. By adopting the process, the problem that the blast furnace production is not smooth because of zinc circulation enrichment in steel companies can be solved, zinc and iron in dust can be economically recycled, carbon can be efficiently utilized, and comprehensive utilization of resources is achieved.

The invention relates to a production method for reducing grade A inclusion rating of titanium-containing steel, and belongs to the technical field of steel smelting. The production method for reducing the grade A inclusion rating of the titanium-containing steel comprises the following steps of: during a smelting process, feeding a core-spun yarn containing titanium dioxide powder to molten steelin 2-5 batches, wherein a feeding speed is 1-4 m/s, the total amount of the fed titanium dioxide is controlled to be 40-120 ppm, the core-spun yarn is composed of two parts: an outer skin and a corelayer, and the core layer is composed of the titanium dioxide powder with a particle size of 5-300 nm. The application of the production method can solve the situation of sulfide inclusion and exceeding the standard of most steel companies at present, and meet the production requirements of the steel with higher requirements on the grade A inclusion, such as sulfur-containing alloy structural steel, sulfur-containing free-cutting steel, etc.

The invention discloses a separation and recovery device for low pressure and high air volume condensation water containing steam. The separation and recovery device is characterized by comprising a casing; a mist inlet, a drainage opening and a dry air exhaust outlet are formed in the casing; the mist inlet is communicated with an original air duct mist outlet; the drainage opening is communicated with a drainage main pipe; a water collection tank is arranged at the bottom inside the casing; an overflow water opening for limiting the water level and formed in the water collection tank is communicated with the drainage main pipe; calandria water condensers are arranged in the casing and located above the mist inlet; baffling mist eliminators are arranged above the calandria water condensers. The calandria water condensers are formed by one or more calandria pipes transversely arranged in the casing. The baffling mist eliminators are formed by one or more rows of baffling plates longitudinally arranged in the casing. The area of the dry air exhaust outlet is less than the cross-sectional area of the casing and is greater than the area of the mist inlet. The separation and recovery device can effectively solve the problem of steel companies, namely low-pressure and high air volume contained steam and the condensation water are directly discharged into the atmosphere, as a result, the separation of water and mist and the recovery and utilization are realized.

The invention discloses an energy-saving production method of mineral wool insulation boards in iron and steel companies. The energy-saving production method comprises steps as follows: directly conveying high-temperature slag into a mineral wool production system from a metallurgical blast furnace, conveying the produced mineral wool and the heat recycled by the process into a mineral wool board production system to manufacture the mineral wool insulation boards. With the adoption of the method provided by the invention, the mineral wool insulation boards in an iron-making or steelmaking process can be synchronously produced, secondary heating and melting of the slag of the blast furnace is avoided, and the heat released by producing the mineral wool is effectively recycled to serve as the heat for thermally shaping the mineral wool insulation boards. With the adoption of the method, a heat insulating tank is arranged, so that the production of the steel and the insulation boards is effectively regulated, and mutual influence in an inconsistent production process is avoided; and a centrifugal sedimentation structure is arranged in the heat insulating tank, so that molten iron and molten steel from the slag can be effectively collected, the metal content in the slag is reduced, the damage on centrifugal rollers of a mineral wool manufacturing device is relieved and the steel output is increased at the same time; and recycling utilization of the waste in the iron and steel companies is realized, the cost of additional products is reduced while energy saving and consumption reduction are realized, and the competitiveness of the products is improved.

The invention relates to a molybdenum iron boron ternary alloy metal-ceramic boring bit. According to the molybdenum iron boron ternary alloy metal-ceramic boring bit, molybdenum, iron, boron and other nonmetallic substances are matched on an iron-based matrix in a certain ratio, and a ternary alloy metal-ceramic iron-based matrix with good toughness and abrasion resistance is obtained by superfine treatment and vacuum sintering; and the ternary alloy metal-ceramic iron-based matrix and the molded alloy structure steel form a boring bit for a blast furnace tapping machine or a spherical sheet tooth boring bit for mines by friction welding, namely forming a novel boring tool. The molybdenum iron boron ternary alloy metal-ceramic boring tool is the novel boring tool researched by Hubei Jiayu Pipe Industry Co., Ltd. and Wuhan University of Technology together, and is widely applied to blast furnace tapping holes of steel companies and rock advancement of mines. The boring bit has light weight, low price and high cost performance, and saves a large amount of precious tungsten metal resources.

The invention discloses a method for preparing ordinary Portland cement from vanadium-titanium slag partially instead of mineral slag, and particularly relates to the technical field of construction material preparation. The method is provided mainly aiming at the ordinary Portland cement, and the ordinary Portland cement comprises the following main materials: clinker, gypsum, limestone, mineralslag, fire coal furnace slag and the vanadium-titanium slag. According to the method, the low-chlorine gypsum is used to replace partial desulfurization gypsum to balance chloride ions in the cement,the vanadium-titanium slag is used to partially replace the mineral slag, so that the vanadium-titanium slag can be used reasonably, the ingredient costs of the cement are reduced and the waste discharge pressure in a Chengde iron and steel company is alleviated while the quality of the cement is guaranteed; and through dozens of laboratory ball mill tests and three months of industrial ball millproduction, production of the ordinary Portland cement by using 50% of vanadium-titanium slag instead of the mineral slag can be realized, the strength of the produced cement is qualified, the chloride ion content meet a national standard in China, the cement performance is not changed, and the ingredient costs are greatly reduced.

The invention relates to a steel wastewater treatment system. According to the steel wastewater treatment system, the output end of a rough grain separator is connected with the input end of an electromagnetic coagulator, the output end of the electromagnetic coagulator is connected with the input end of an inclined plate deposition tank, the output end of the inclined plate deposition tank is connected with the input end of a hot water tank, the output end of the hot water tank is connected with the input end of a cooling tower, the output end of the cooling tower is connected with the input end of a cold water tank, the output end of the cold water tank is connected with the input end of a filter, and the output end of the filter is connected with the input end of a rotary furnace. By adopting the steel wastewater treatment system, the problem of wastewater pollution of steel companies can be solved, and the water can be saved.

The invention discloses a floating sulfur collecting agent and a method for reducing the sulfur in iron ore concentrate through flotation. The floating sulfur collecting agent consists of amyl potassium xanthate and N,N-diethyl sulfo-amino sodium formate in a mass ratio of 1-3:1. The method for reducing the sulfur in the iron ore concentrate through flotation by using the floating sulfur collecting agent comprises the following steps of: adding regulators into low intensity magnetic separation iron ore concentrate pulp so as to adjust the pH value, further adding the floating sulfur collecting agent provided by the invention, and carrying out the primary rough separation and the primary fine separation, wherein pyrrhotite with better dissociation can be floated in the rough separation, pyrrhotite coenobium can be further floated in the fine separation, the sulfur content in the iron ore concentrate obtained after the fine separation can be less than 0.1%, and the iron loss can be less than 5%. The method for reducing the sulfur in the iron ore concentrate through flotation is simple in steps and is strong in operability as only the floatation working needs to be added, and the sulfur can be reduced to 0.1% under the condition that the sulfur content in feeding is as high as 1%, so that the requirements of large steel companies for the raw materials are met, and the overall quality of steel materials is improved.

The invention relates to a regenerated water making system and method. The system comprises a regenerated water sucking well, a reclaimed water supply tube, a desalted water supply tube, a reclaimed water pressure difference flowmeter, a reclaimed water adjusting valve, a desalted water pressure different flowmeter and a desalted water adjusting valve, wherein the reclaimed water supply tube and the desalted water supply tube are connected with the input end of the regenerated water sucking well; the reclaimed water pressure difference flowmeter and the reclaimed water adjusting valve are arranged on the reclaimed water supply tube; the desalted water pressure different flowmeter and the desalted water adjusting valve are arranged on the desalted water supply tube. The method comprises thefollowing steps: treating sewage generated in a steel company into reclaimed water in a sewage treatment station; feeding the reclaimed water into the regenerated water sucking well; feeding desaltedwater into the regenerated water sucking well; mixing the reclaimed water with desalted water according to a set ratio, thereby obtaining regenerated water. The regenerated water made by using the regenerated water making system and method is capable of meeting requirements on quality of industrial purified circulated water and turbid recycled water, reducing the making cost of regenerated water,increasing the recycling rate of reclaimed water, reducing emission of reclaimed water, and increasing economic and environment protection benefits.

The invention discloses a carbon emission cost control system for small and medium-sized iron and steel companies, and relates to the technical field of iron and steel tools. The carbon emission detection device is connected with the statistics device, the statistics device is connected with the analysis system, the analysis system is connected with the processing system, and the processing systemis connected with the analysis system, the display device and the management device. The management device is connected with the display device, the carbon emission detection device is used for detecting carbon emission and transmitting carbon detection data to the statistical device, the statistical device is used for counting the data and transmitting the counted data to the processing system,and the processing system is used for processing the data and transmitting the data to the analysis device. The analysis device transmits the analyzed data to the processing system, and the processingsystem displays the information on the display device; according to the invention, the efficiency is improved, rapid data acquisition and control can be realized, the stability is high, and the dataaccuracy is high; the time is saved, the control is convenient, the use is convenient, and the data processing and marking can be realized.

There is provided a method for direct transaction of metal scrap through enlarged collection quantities that can increase profitability by enabling to calculate a conversion price in which a weight value on a weight basis and on timing basis of scraps formed in a large quantity is reflected while making small quantities secured by scrap dealers to a large quantity by collecting, to transmit the conversion price to each dealer, to determine a sale intention, to sell the scraps to several kinds of buyers, and to sell the scraps to a dealer, a middle merchant, and a large merchant with a highest price and that can enhance productivity while minimizing a management cost by providing a large quantity of scraps to steel companies.