264results about How to "Reduce oxidation burn" patented technology

The invention belongs to the field of casting technologies and new materials and particularly relates to a high-strength high-tenacity cast-state QT700-10 and a production method thereof. Compared with ductile iron produced in the prior art, the high-strength high-tenacity cast-state QT700-10 has high strength and a high elongation rate, heat treatment is not needed, heavy metal, such as, Ni and Mo are not added in production, the tensile strength Rm in the cast state is larger than or equal to 700 MPa, the elongation rate A is larger than or equal to 10%, compared with the standard brand QT 450-10, the lowest tensile strength is improved by 55% under the same elongation rate; and compared with the standard brand QT 700-2, the lowest elongation rate is improved by four times under the same tensile strength. The high-strength high-tenacity cast-state QT700-10 can meet requirements of automobile ductile iron castings with high requirements for safety and comprehensive mechanical properties.

A design and control method for the optimizing control system of intermediate rolling mill and heating furnace in order to improve the heating quality of billet in the heating furnace and save energy features that the heating furnace and intermediate rolling mill constitute a closed loop system, the information (rolling force, temp, etc) is fed back to heating furnace for dynamically changing the heating temp, and the optimizing control strategy and control algorithm are used in the billet heating process.

The invention discloses a system and method for automatically controlling the content of residual oxygen in a regenerative heating furnace and belongs to the technical field of control over combustion of heating furnaces. The system comprises a computer terminal, a programmable controller, a regulating valve, zirconium oxide analysis meters and a heat value analysis meter. A combustion section of the heating furnace comprises a first heating section, a second heating section and a soaking section, the zirconium oxide analysis meters are installed in the middle portions of the tops of all the sections, and the heat value analysis meter is installed in front of an inlet of a gas main. During combustion of the heating furnace, the actual air-fuel ratios are obtained through calculation according to the theoretical air-fuel ratios of the three sections, and optimal control over the content of the residual oxygen in a hearth is achieved by combining the zirconium oxide analysis meters with the heat value analysis meter for control. The system and method for automatically controlling the content of the residual oxygen in the regenerative heating furnace have the advantages that a gas and an air flow control valve is controlled reasonably, accurately and rapidly, the adjustment function of the regulating valve is effectively utilized, optimal control over the content of the residual oxygen in the hearth of the heating furnace is achieved, fuel is saved, and pollution is reduced.

The invention relates to the technical field of heating furnaces of heat treatment equipment applied in the steel rolling industry, in particular to a high-efficiency intelligentized heating furnace control method. The method adopts a PLC (programmable logic controller) system for field control and an upper computer operating system communicating and connected with the PLC system to form an intelligent control system, and moreover, the intelligent control system is utilized to efficiently, scientifically and intelligently control a heat furnace. The method is characterized in that the intelligent control system controls and sets the heating furnace in the following six aspects: (1) furnace temperature control; (2) internal pressure control; (3) air-fuel ratio control; (4) safety protection system control; (5) adoption of an human-machine interface (HMI) on the intelligent control system; (6) history data recording. The method can reasonably control heating temperature, furnace temperature and furnace pressure at each stage in real time, increases the heating utilization rate, has an outstanding effect in saving energy and reducing consumption, increases the production efficiency, reduces the production cost, and prolongs the furnace service life.

The present invention discloses a straight-curved type casting machine low-alloy steel slab continuous casting full-rolling section narrow face cooling method, and is aimed at solving the problem of that on the casting blank surface corner portion of low-alloy steel the transverse crack can be easily produced. Said invention belongs to the field of metal continuous casting blank cooling and surface quality control technology. Said method is characterized by that in the full-rolling section of continuous casting straight-curved type casting machine slab said invention utilizes the nozzles which are symmetrically mounted at left side and right side of casting blank pouring direction to cool the narrow face of said casting blank, and adopts rectangular nozzles to symmetrically and simultaneously cool the narrow faces of left and right two sides of casting blank. Said invention also discloses a kind of rectangular nozzle for said method, the water outlet hole of its sprayer is a hole with rectangular section. Said invention can reduce casting blank cooling strength of full-rolling section under the crystallizer and can improve casting blank cooling uniformity, so that it can eliminate casting blank surface corner portion transverse crack defect of continuously-cast high-strength low-alloy steel whose steel quality is P510L, P590L, J55 and X52, etc.

The invention discloses a continuous annealing acid pickling system for a hot rolling stainless steel composite steel belt. The system comprises two uncoilers, a straightener, two crop end shears, an MIG argon arc automatic welder, a front loop, a continuous annealing furnace, a straightener, four shot blasting machines, six shallow slot turbulent flow acid pickling grooves, a temper mill, a rear loop, a slitting shear and a recoiler. The invention also discloses an acid pickling method which utilizes the system. After the technology is adopted, the production efficiency is high; the product performance and the surface quality are stable; a product can meet the requirements of customers; the processing cost is low; and the market competitiveness is strong.

The invention discloses a melting and casting Cu-Cr-Zr alloy method, which comprises the following steps: loading electrolytic copper, cupraloy and metal zirconium in the protective gas induction furnace; fusing; casting from bottom; connecting lower cast hole and crystallizer with gas protecting device. The whole course is protected by pure gas with low hydrogen and oxygen partial pressure, which provides good quality casting ingot.

The invention relates to a grain refiner and an application of the grain refiner in an aluminum alloy wheel hub. The grain refiner is characterized by being prepared through the following steps: (1) preparing powdery Al, Ti and B participating in the reaction according to mass percents of 65-75%, 15-30% and 5-10%; (2) smelting an aluminum ingot containing 6.5-7.5% of silicon and 0.3-0.45% of magnesium, adding a covering agent and a refining agent, degassing and stewing to obtain a matrix alloy fused mass; and (3) putting reaction blocks in an electromagnetic induction furnace for heating and drying, pressing the reaction blocks into the fused mass according to 5-10% by mass of the matrix melt through an immersion bell in batches, keeping the temperature for 20 min to perform thermal explosion synthetic reaction on the reaction blocks in the fused mass so as to crack and disperse the reaction blocks due to strong heat release, and mechanically stirring the fused mass to completely dilute the synthetic product and disperse the synthetic product in the aluminum fused mass. The solution and diffusion periods of the TiAl3 phase of the aluminum alloy solution prepared by the method are greatly reduced, the dispersibility of the TiB2 particles is greatly improved to facilitate the refining function, and the size of the casting crystalline grain of an intermediate alloy can be effectively controlled to be lower than 40 microns.

The invention belongs to the technical field of corrosion and prevention, and in particular relates to a casting method of an aluminum alloy sacrificial anode. The casting method comprises the following steps: adding basic electrolytic molten aluminum to a resistance furnace; then adding a zinc ingot to obtain molten aluminum alloy; performing jet refining on the molten aluminum alloy by adopting an argon located refining agent; charging argon to refined aluminum alloy melt to degas; drossing oxidizing scum on the surface of the aluminum alloy melt through a drossing tool; adding a low melting point metallic element to drossed aluminum alloy melt; electromagnetically agitating the melt after pressing the low melting point metal; carrying out ceramic filtering; pouring and casting the aluminum alloy melt to a preheated iron anode mould at an even casting speed under the temperature of 700 to 740 DEG C until the mould is full of the aluminum alloy melt; and moving the aluminum alloy melt out of the mould after cooling, solidifying and molding, so as to obtain the aluminum alloy sacrificial anode. The casting method has the characteristics of being short in smelting time, small in loss of iron scale, high in degassing and purifying performances, and low in smelting cost.

The invention discloses a furnace temperature controlling method in a heating process of plate blank of a heating furnace. An optimal control scheme is determined by adopting an adaptive differential evolution algorithm according to the heat transfer characteristic in the heating furnace based on the constraint conditions such as heating mass requirements, production equipment safety and the likeof the plate blank, so that the setting temperature of the heating furnace is obtained and temperature control in the heating process of the plant blank is realized. On the premise that the production requirement is met and the temperature of the plant blank meets the hot rolling requirement, the adaptive differential evolution algorithm is improved, and mutagenic factors and crossover probability are adaptively regulated, so that the global searching ability of the algorithm can be improved, the algorithm convergence is quickened and the searching precision of the algorithm is improved. By implementing the method, the temperature of the heating furnace is reduced, over-burning is avoided, the oxidative burning loss of the plant blank, the energy consumption, the production cost and the discharge of waste gas are reduced, and the economic benefits and the social benefits of an enterprise are improved.

The invention provides a heating method for controlling decarburization in a heavy rail billet furnace in a heat accumulation heating mode. The heating process comprises a pre-heating section, a heating section and a soaking section. A furnace pressure measurement point is positioned at the pre-heating section; the full furnace is controlled at positive pressure; when the billet temperature is controlled to be less than 1,000 DEG C, the atmosphere in the furnace is oxidizing atmosphere, and the air consumption coefficient is between 1.05 and 1.25; and when the billet temperature is controlledto be more than or equal to 1,000 DEG C, the atmosphere in the furnace is weak reducing atmosphere, the air consumption coefficient is between 0.9 and 1.0. Aiming at the operation and decarburizationcharacteristics of the heat accumulation heating furnace different from the traditional heating furnace, the segment control method is adopted on the control aspects of atmosphere in the furnace and temperature, and a limit low-oxygen concentration burning process is realized. The method has the advantages of low heated billet surface decarburization, low oxidized burning loss, high furnace energy utilization, low pollutant discharge, low production cost and the like, is simple, convenient and feasible, and can achieve good effect of saving materials and energy at the same time of improving the heating quality of products.

The invention relates to a super-high-plasticity high-strength cast magnesium alloy and a preparation method thereof. The cast magnesium alloy comprises the following chemical components by mass percent: 0.5-8.05% of tin, 1.0-6.0% of aluminum and the balance of magnesium. The preparation method comprises the following steps: under the protection of gases, melting preheated the pure magnesium at apreset low temperature, adding the tin and the aluminum in a certain proportion into the melt, evenly stirring after completely melting, heating to a high preset temperature to refine and remove slag,and finally casting to form ingots, The cast magnesium alloy has the advantages of super-high plasticity and high strength; and the preparation method has the advantages of simple technique, high reliability, easy popularization and application, and the like.

The invention discloses an optimized air-distribution control system for an industrial furnace. A combustor is connected with a fuel valve and an air valve connected with a hot air tube, a flue is connected with the inlet of a heat exchanger, and the outlet of the heat exchanger is connected with an induced draft fan set driven by an induced draft speed governor. A bypass valve is arranged betweena cold air tube and the hot air tube, and the cold air tube is connected with an air outlet of an air blower set driven by an air blast speed governor. An outlet of a sampling tube is connected withan flue gas oxygen concentration analyzer; a signal output end of the flue gas oxygen concentration analyzer is connected with a first signal input end of a controller, a second signal output end of the controller is connected with a control signal input end of the induced draft speed governor, a furnace pressure duct is connected with a pressure transmitter a signal output end of which is connected with the second signal input end of the controller, the first signal output end of the controller is connected with the control signal input end of the air blast speed governor, and a communicationport of the controller is connected with a human-computer interface. The invention controls the rotate speed of the induced draft fan set and the air blower set driven by the speed governors throughdetecting the pressure and flue gas oxygen concentration values in the furnace on line so that the furnace is in the optimized air-distribution state all the time.

The invention relates to a technology of combustion, in particular to a flue gas recirculation high-temperature air energy-saving and environmental protection combustion technology which is applied to the boiler combustors such as utility boilers, industrial boilers, metallurgical heating furnaces and the like. The invention adopts the concept of flue gas recirculation combustion, realizes real oxygen-poor high-temperature combustion, stabilizes theoretical flame temperature, creates the reducing flue gas environment, reduces oxidation combustion loss, reduces generation of NOX in two-way, and greatly saves fuel. The invention not only saves energy and reduces emission, but also achieves nitre reduction.

The invention provides a novel waste aluminum smelting furnace. The novel waste aluminum smelting furnace comprises a main smelting chamber and a lateral well chamber arranged on the lateral part of the main smelting chamber, wherein the lateral well chamber comprises a feeding area and a pumping area which are communicated with each other; the feeding area and the pumping area are both communicated with the main smelting chamber; and the pumping area is provided with a circulating pump. The molten aluminum is pushed by the circulating pump to repeatedly circulate around the main smelting chamber, the feeding area and the pumping area, and because the molten aluminum quickly flowing can allows the charged materials to be deposited in the molten aluminum quickly, the oxidation burning loss is reduced, the metal recovery rate is improved and the yield and the utilization rate of fuel are also improved indirectly; and in addition, due to the pushing of the circulating pump, the texture of the molten aluminum is uniform in three chambers, and simultaneously the temperature stratification is reduced or eliminated.

The invention discloses a method for regulating and controlling an air-flowing environment of a heating furnace, which belongs to the field of combustion monitoring and controlling, is applicable to detection and optimal control over combustion of a heating furnace and solves the problems that a mode is needed to be retrained when actual operation work conditions are deviated from preset conditions of the model or when parameters for supporting model operation are detected to be abnormal because an empirical mode is applied in the internal combustion monitoring of the traditional furnace. Themethod comprises the steps of equipment arrangement detection, image number processing and control. According to the method disclosed by the invention, a radioactive energy signal is extracted from flame image in different arranged sections of the heating furnace and is combined with air-flowing environments in the different sections for detecting and calculating reasonable air/combustion ratio, thus the oxidation and burn of steel and furnace tubes caused by the improper air-flowing environments in the heating furnace are reduced and the irregularity of quality of products in different batches is prevented. According to the method, proper air-flowing environments in the furnace can be created, temperature measuring errors are reduced and operation optimization, energy saving and emissionreduction of the heating furnace are realized.

The invention relates to a device used in non-vacuum smelt casting oxidizable metal and alloy. Wherein, the furnace has heater and pot; the furnace cover has gas inlet and material inlet; and it has cooler; the bottom of furnace has lower irrigator; the bottom of pot has bottom bowl; the irrigator of bottom bowl contacts the plug rod vertically; the bottom plug rod is connected to the dummy ingot head; the dummy ingot head adjusts the position of plug rod; the bottom bowl is connected to crystallizer connected to the cooler; the crystallizer has graphite sheath and cooling water groove, to reduce the casting ingot temperature; the dummy ingot head has dovetail groove to solidify the fusion as drawing function; the dummy ingot head is connected to adjuster. The invention processes the whole process under protective gas, with low hurt rate and improved quality.