17results about How to "Reduce oxidation burn" patented technology

A method for optimizing the scheduling of heating furnace groups in steel enterprises based on multi-agent simulation belongs to the technical field of intelligent optimization scheduling of production workshops. It includes: initialization, data reading, calculation of the ratio of cold-loaded slabs and hot-loaded slabs in each rolling unit, determination of the furnace loading mode of each rolling unit according to the ratio of cold and hot slabs and the position of cold and hot slabs in the rolling process, and the furnace loading sequence and heating furnace number of each rolling process as input, and starting the multi-agent simulation model of the heating furnace group to perform heating furnace group scheduling simulation; according to the simulation results, the evaluation index of each rolling process is calculated, and each rolling process that does not meet the index requirements is obtained in sequence, and iterative optimization and adjustment are performed, and finally the simulation scheduling strategy is output. The advantage is that it solves the scheduling and production scheduling problem of heating furnaces under the dedicated furnace mode and the smooth transition scheduling problem of different heating furnace scheduling modes between multiple rolling processes, which is more in line with the actual situation on site.

This invention belongs to the field of combustion control technology for heating furnaces, specifically a dynamic prediction method for air-fuel ratio based on combustion control in heating furnaces. It includes preprocessing raw monitoring data from the heating furnace operation process based on combustion mechanisms, constructing a multi-dimensional input vector, outputting the optimal air-fuel ratio prediction value for future moments based on an improved LSTM neural network model, and adjusting the combustion air supply to the heating furnace according to the optimal air-fuel ratio prediction value. This invention effectively solves the problem of slow response to gas fluctuations and changes in operating conditions in traditional methods through the synergistic driving of mechanisms and data, significantly improving the accuracy and real-time performance of combustion control. Furthermore, by deeply integrating physical mechanisms, it enhances the model's generalization ability and interpretability, significantly improving the thermal efficiency of the heating furnace and reducing unit product energy consumption and harmful gas emissions.

The utility model belongs to the field of steel rolling heating furnaces, and particularly relates to a heating furnace capable of reducing steel rolling heating oxidation burning loss, which comprises a heating furnace body, a support is arranged at the front end of the heating furnace body, and five groups of conveying rollers are rotatably connected onto the support. An adjusting mechanism is arranged at the bottom end of the support and comprises two sets of hydraulic ejector rods, the top ends of the hydraulic ejector rods are fixedly connected with a connecting frame, the top end of the connecting frame is fixedly connected with a long plate, four sets of fixing blocks are fixedly connected to the top end of the long plate, and rectangular grooves and U-shaped grooves are formed in the fixing blocks. The bottom end of the fixed block is in threaded connection with a bolt, the top end of the bolt abuts against the movable plate, three sets of supporting blocks are fixedly connected to the movable plate, three sets of semicircular blocks are fixedly connected to one side of the fixed block, the semicircular blocks and the supporting blocks make contact with the adjusting roller, and a plurality of sets of notches are formed in the top end of the support.

The invention relates to a trolley-type silicon carbon rod high-temperature resistance furnace and an operating method, comprising a furnace door, a furnace body, a trolley, and a double-acting flip sealing mechanism, wherein the furnace door cooperates with the furnace body, and the furnace body is composed of an inner low-cement refractory castable, a refractory fiber lining, and an outer steel structure furnace body, wherein the low-cement refractory castable is located at the lower part of the furnace body side wall, the lower part of the furnace body rear wall, and the furnace mouth, and the refractory fiber lining is located at the furnace top, the furnace body side wall, and the upper and middle part of the furnace body rear wall, and the bottom of the low-cement refractory castable has a support seat; a trolley is provided in the furnace body, and silicon carbon rods are used for heating, so that the furnace temperature uniformity is better than that of a flame furnace, and the product thermal processing quality is improved; the sealing strip is flipped upward to a horizontal state to realize the sealing between the trolley and the furnace body, and flipped downward to a vertical state to form a chamber furnace, so as to avoid causing the furnace temperature to drop rapidly, thereby delaying the oxidation of the silicon dioxide film and extending the service life of the silicon carbon rod.

The invention discloses a process for reducing oxidation burning loss of a medium-thickness plate heating furnace, which belongs to the technical field of ferrous metallurgical equipment maintenance and production processes, and specifically comprises the following steps: (1) arranging a charging organization for production in a manner that a steel billet discharged from a continuous casting machine is directly conveyed in a hot charging manner or is conveyed in a hot charging manner or is conveyed in a hot charging manner, and a cold charging blank is used as an auxiliary manner; (2) a low-temperature heating process is adopted, and the heating temperature is controlled to be 1120-1160 DEG C; (3) the in-furnace time of the cold charging blank is controlled to be larger than or equal to 8 min / cm, and the in-furnace time of the hot charging blank of hot charging direct conveying or hot charging hot conveying is controlled to be larger than or equal to 6 min / cm; and (4) the residence time of each section of the heating furnace is controlled, the residence time of the heating section is smaller than or equal to 45 min, and the residence time of the soaking section is smaller than or equal to 40 min. According to the structure of the heating furnace, through reasonable production organization, optimization of the heating process and control of time nodes, the oxidation burning loss of the surface of the steel billet in the heating process is reduced to the minimum, and the production efficiency is improved. And meanwhile, the shutdown time of a production line is shortened, and the comprehensive economic benefits of the production line are improved.

The utility model belongs to the field of waste aluminium recycling and processing, specifically speaking is a kind of aluminium scrap recycling and conveying melting pool, including machine body, the inside rotatable joint of machine body has the pivot, both ends of pivot all are through machine body and are connected with the inner chamber rotation of machine body, the surface transmission sleeve of pivot is equipped with conveyer belt, the bottom of machine body is provided with melting pool main part, and conveyer belt is used in cooperation with melting pool main part, the top of machine body is provided with vibrating mechanism, and vibrating mechanism is used in cooperation with conveyer belt;Through setting vibrating mechanism, through the synergistic effect of drum screen vibration and rolling can effectively break up the aluminium scrap of knot, make it become loose dry, this not only eliminates the splash explosion risk caused by water vaporization in knot aluminium scrap when directly melting, more improves the thermal efficiency of melting furnace, shortens melting time, simultaneously reduces slag formation and aluminium oxidation burn loss, to improve metal recovery rate and the purity of secondary aluminium.

The invention discloses a preparation method for reducing oxidation burning loss of active elements in the smelting process of a Cu-Cr-Zr alloy, and belongs to the technical field of alloy smelting. The preparation method comprises the following steps: preparing materials according to a formula ratio, firstly adding Cu particles after baking, adding a covering agent when the Cu particles begin to melt, and regulating the temperature to 1150-1250 DEG C after all molten copper is melted down; a deoxidizing agent Cu-Mg intermediate alloy is added, and a covering agent is supplemented; and a Cu-Cr intermediate alloy is added, a covering agent is supplemented, heat preservation smelting is conducted for 20-30 min, and the temperature is adjusted to 1250-1350 DEG C. And adding the deoxidizing agent Cu-Mg intermediate alloy again, supplementing the covering agent, adding the Cu-Zr intermediate alloy, supplementing the covering agent, carrying out heat preservation smelting for 20-30 minutes, and regulating the temperature to 1150-1250 DEG C. And after slagging-off, pouring is conducted, and the Cu-Cr-Zr alloy is obtained. According to the method, the defects that alloy components are not uniform and unmelted metal particles are contained can be overcome, the quality and comprehensive performance of the alloy material are improved, the yield of Cr and Zr elements is greatly increased while the oxidation burning loss of active elements is reduced, the yield of the Cr element is larger than or equal to 84%, and the yield of the Zr element is larger than or equal to 50%.

The application provides a rare earth-titanium-boron composite vacuum seal welding high-density cored wire and a preparation method thereof, and belongs to the technical field of metallurgical auxiliary materials. The preparation method comprises the following steps: weighing lanthanum-cerium rare earth alloy powder, titanium powder and boron powder for batching, and then uniformly mixing under a protective atmosphere to obtain mixed powder; filling the mixed powder into a low-carbon steel cylinder after pretreatment under a protective atmosphere, and then preliminarily sealing to obtain a composite blank; performing a reduction reaction on the composite blank in hydrogen, and then performing seal welding under a vacuum condition to obtain a composite blank after vacuum seal welding; heating the composite blank after vacuum seal welding, and then performing hot drawing to obtain the cored wire. The cored wire provided by the application realizes stable composite addition of rare earth, titanium and boron with high recovery rate, and significantly improves the structure and performance of 20Mn2 steel and the like, and solves the problems of cold heading cracking, insufficient toughness and aging embrittlement.

The application provides a control method and system for heating furnace combustion optimization, comprising the following steps: S1, connecting a control station with an original fuel control system through Ethernet, and connecting a control manual channel of the original fuel control system; S2, performing temperature control, using relevant valve experience data and furnace change response data to confirm the change amount of the valve and the temperature change corresponding relationship; S3, using actual temperature field change data to perform operation judgment, and sending an execution signal to the relevant valve through temperature difference calculation selection; S4, completing air flow control by the relevant air valve; and S5, sending a control signal to the original fuel control system to complete control. The application improves the combustion stability of the heating furnace, reduces the high dependence on manual operation experience at present, reduces gas consumption and oxidation loss, has high control precision, fast speed response, stable combustion trend, reasonable air-fuel ratio, low modification difficulty and connection safety.

The present invention provides a method for controlling the precipitation of primary carbides during the solidification process of GH3128 nickel-based high-temperature alloy, and relates to the technical field of alloy production. The method includes a vacuum induction melting process and an electroslag remelting process, wherein in the vacuum induction melting process, a nickel-magnesium alloy is added to the molten steel, and after being melted, it is cast into a casting mold to obtain a vacuum induction ingot; in the electroslag remelting process, the cooling water flow is controlled, quaternary slag is used, and the vacuum induction ingot is used as a consumable electrode for remelting to obtain an electroslag ingot. Adding the nickel-magnesium alloy and using the quaternary slag can help reduce the oxidation and burning of the magnesium element in the electroslag remelting process, while controlling the cooling water flow of the crystallizer can help increase the cooling rate of the molten steel in the molten pool. By coordinated control of the magnesium content and the cooling rate, it is ensured that the primary carbides precipitated during the solidification process of the GH3128 nickel-based high-temperature alloy are small in size and evenly dispersed, thereby improving its high-temperature plasticity and creep life.

The invention discloses ultra-thin ultra-low carbon steel and a manufacturing method thereof. The ultra-thin ultra-low carbon steel comprises the following chemical components in percentage by weight: less than or equal to 0.0020% of C, less than or equal to 0.030% of Si, 0.08-0.15% of Mn, 0.040-0.080% of Ti, 0.010-0.050% of Nb, less than or equal to 0.0005% of B, less than or equal to 0.0040% of N, 0.015-0.050% of Als, less than or equal to 0.020% of Cr, less than or equal to 0.020% of Cu and the balance of Fe and inevitable impurities. According to the ultra-thin ultra-low carbon steel produced through the method, the hot coil yield strength is 130-150 MPa, the tensile strength is 270-290 MPa, the yield ratio is 0.48-0.60, the hardness is 43-48 HRB, and the plastic strain ratio r is 1.20-1.40. Compared with a conventional process, the ultra-low carbon steel hot coil produced through the method has the advantages that the yield strength of the ultra-thin ultra-low carbon steel hot coil is 130-150 MPa; the average yield strength corresponding to the head position, the middle position and the tail position of a hot coil is reduced by 39.6%-41.46%, the average tensile strength is reduced by 9.51%-11.42%, the average hardness is reduced by 6.59%-6.35%, the average yield ratio is reduced by 32.78%-34.76%, the average r is increased by 36.86%-45.62%, and the deep drawability of the material is improved by reducing the material strength, especially increasing the r value.

This invention relates to the field of steel rolling technology, specifically disclosing a method, apparatus, equipment, and storage medium for controlling a steel rolling heating furnace. The method includes: acquiring the material and position parameters of a steel billet; calculating the temperature distribution and heat exchange capacity of the heating furnace; calculating the temperature distribution of the steel billet using the material and position parameters, as well as the temperature distribution and heat exchange capacity of the heating furnace; and adjusting the air-fuel ratio of the heating furnace according to the temperature distribution of the steel billet. The steel rolling heating furnace control method proposed in this invention collects and predicts the heating process of the steel billet, calculates the temperature of the steel billet at different positions in the heating furnace, predicts temperature changes, and controls the combustion status of the heating furnace, thereby achieving the purpose of saving fuel consumption and reducing oxidation loss.

This invention discloses a bar rolling production process that considers surface temperature drop compensation, including continuous casting, heat preservation conveying, heating, descaling, continuous rolling under surface temperature control, cooling, shearing, and bundling and collection. By adding induction heating devices between rolling mills, the uniformity of the overall temperature during continuous rolling is controlled, improving the surface hot working performance of bars under high-temperature rolling processes. The distinction between roughing, intermediate, and finishing rolling is eliminated, and a tightly connected continuous rolling mill unit with a short-flow, near-net-shape process layout is adopted, shortening the process flow. Through a combination of rolling deformation and inter-pass induction heating, a uniform temperature field is formed throughout the bar rolling process. After rolling, air cooling ensures a uniform transformation of the microstructure into a ferrite-pearlite microstructure. The produced bar products have excellent surface quality, and the production line features a short production flow, high production efficiency, and low energy consumption, aligning with the green development direction of the iron and steel metallurgical industry.

The invention relates to the technical field of alloy stent material preparation, and discloses a zinc-aluminum-magnesium-coated high-strength stent material, which is prepared by the following steps: selecting a low-carbon microalloy high-strength steel cold-rolled steel coil, uncoiling, degreasing with alkali liquor, pickling with hydrochloric acid, rinsing with hot water, and drying to obtain a clean steel strip; the clean steel strip is input into a continuous annealing furnace, recrystallization annealing is conducted in the protective atmosphere, heat preservation is conducted for 60-120 seconds at the temperature of 850 + / -20 DEG C, then exposure is conducted in the micro-aerobic environment, reduction is conducted in the strong reducing atmosphere, and an activated steel strip is obtained; electromagnetically stirring and filtering the plating solution to obtain an improved plating solution; preheating the activated steel strip, vertically immersing into an improved plating solution for immersion plating, and sealing and protecting by nitrogen; after the strip steel is taken out of the plating pot, high-pressure nitrogen is used for purging and rapid cooling, then slow cooling is conducted, and water mist cooling is conducted to the room temperature after the temperature is lower than 320 DEG C; coating the steel strip with a silane-zirconate composite passivation solution, and drying and curing the steel strip to obtain a passivated steel strip; and finishing, shearing and packaging to obtain the high-strength stent material with the zinc-plated aluminum-magnesium coating.

The utility model provides a cold and hot blank mixed loading pure oxygen combustion steel rolling heating furnace system which comprises a preheating chamber, a soaking chamber and a heating furnace. The preheating chamber acts on a cold charging steel billet and is connected with a flue gas recovery pipeline of the heating furnace; the soaking chamber acts on preheated cold charging steel billets and hot charging steel billets produced in the continuous casting process, and an outlet of the preheating chamber, an outlet of the continuous casting process and an inlet of the soaking chamber are all connected with a steel billet conveying device; the preheated cold billets and hot billets are alternately arranged on a steel billet conveying device and tightly attached, and heat is transferred to each other in a soaking chamber; and the heating furnace is a pure oxygen heating furnace and acts on the mixed billet conveyed from the soaking chamber. High-temperature flue gas is recycled, hot-charged steel billets and preheated cold-charged steel billets are tightly arranged in a soaking chamber for heat transfer, the temperature difference between the cold-charged steel billets and the hot-charged steel billets is reduced, control over the temperature and heating time in a heating furnace is facilitated, the production rhythm is kept, and energy loss is reduced; by controlling the oxygen-fuel ratio of each section of the heating furnace, the oxidation reaction on the surface of the billet is reduced, and the oxidation burning loss is reduced.

The invention discloses a control method for reducing oxidation burning loss of a double-heat-storage walking beam furnace, which belongs to the technical field of large plate blank heating furnaces and comprises the following steps: controlling the temperature of a hearth according to the rolling specification of a plate blank, controlling the temperature of a first heating section to be 1000-1050 DEG C, the temperature of a second heating section to be 1150-1200 DEG C, the temperature of a third heating section to be 1250-1300 DEG C and the temperature of a soaking section to be 1250-1280 DEG C; the CO content range in the high-conversion mixed gas is controlled to be 26-32%, and the residual oxygen content in the flue gas is controlled to be less than 8%; controlling the air-coal ratio of the first heating section to be 0.8-0.95, the air-coal ratio of the second heating section to be 0.8-0.95, the air-coal ratio of the third heating section to be 0.9-1.0 and the air-coal ratio of the soaking section to be 0.8-0.9; the cold blank and the hot blank are separately charged into a furnace, the time of the hot blank in the furnace is controlled to be 120-140 minutes, and the time of the cold blank in the furnace is controlled to be 160-180 minutes; the technical problem of oxidation burning loss in steel rolling production is solved.

The invention relates to the technical field of metal scrap recovery, and discloses a continuous solid recovery device and method for alloy cuttings. The alloy chip continuous solid recovery device comprises a molten salt bath, an inclined bottom groove inclined towards the lower end is formed in the molten salt bath, the upper end of the inclined bottom groove is communicated with a spiral feeder, and a spiral heating pipe is arranged on a shell of the spiral feeder in a surrounding mode; the upper portion of the end, away from the molten salt bath, of the spiral feeder communicates with a metal chip feeding pipe. The continuous solid recovery method for the alloy cuttings comprises the steps that the metal cuttings are fed into a molten salt bath for melting after being subjected to vacuum degassing, metal liquid drops are collected along the inclined bath bottom, and after electrolytic refining, pure melt is continuously guided out to casting equipment through a heat preservation siphon; meanwhile, the molten salt is recycled after being regenerated. Efficient melting and impurity dissolving are achieved through the molten salt medium, negative pressure feeding and closed-loop circulation are utilized, and the problems that a traditional technology is serious in oxidation burning loss, high in energy consumption and discontinuous in process are effectively solved.