57results about How to "Uniform furnace temperature" patented technology

The invention discloses a heat accumulated type lead-melting furnace, which includes a furnace body, a heat accumulated type combustion system and a automatic combustion control system, wherein the heat accumulated type combustion system mainly includes heat accumulated type burners, a combustion gas pipeline, a smoke evacuation system and a air supplying system, the heat accumulated type burners are arranged at one side of the furnace body in pair, a main pipeline of the combustion gas pipeline extends to heat accumulated type burner tips of the two heat accumulated type burners through a combustion gas reversing valve and two branch pipelines, heat accumulated bodies of the heat accumulated type burners are respectively connected with a blower exhaust pipeline of the air supplying system and a draught fan smoking pipeline of the smoke evacuation system through the pipeline and a triple valve, and the triple valve is used for controlling air inlet or smoke evacuation. The invention can reduce fuel consumption, save energy, reasonably control combustion status in the furnace and increase operation security performance of the furnace.

The invention provides a heating furnace pulse control system and method and belongs to the technical field of metallurgy. The upper section of the system conducts heat supply through flat flame burners, and the lower section of the system conducts heat supply through NOx burners. The three burners are arranged at the south end of the lower section, and the three burners are arranged at the northend of the lower section. The heating furnace pulse control system integrates the double-cross amplitude limit technology and the pulse control technology. Every two crossed burners of the six burnersof the lower section serve as a group, and the three groups of the burners work in sequence. According to the heating furnace pulse control system, the pulse combustion technology is adopted; as allthe burners work under high-load conditions, extrusive flames are long, and the thermal radiation capacity is high; thus, steel blanks can be heated uniformly, and the burners can be protected againstbackfire; moreover, through periodic switching of the pulse burners, the furnace atmosphere can be blended sufficiently, the gas thermal convection capability is enhanced at high radiation, and the heating uniformity of the plate blanks is further improved.

The invention relates to a production process of high-toughness and ultra-high strength steel and a production system thereof. The production system comprises a descaling box, a roughing mill, a temperature waiting roller table, a finishing mill, an ultra-fast cooling system, a thermal straightening machine, steel splitting racks and an open flame tempering furnace. The production process comprises the following steps of: fully heating a plate blank, discharging the plate blank from a furnace, descaling the plate blank, sequentially performing rough rolling, temperature waiting, finish rolling, on-line ultra-fast quenching and fast thermal straightening, separating the plate blank from a main production line through the steel splitting racks, fast sending a steel plate into the open flame tempering furnace for heat insulation, performing carbon distribution at PT (carbon distribution temperature), discharging the steel plate from the furnace, and then performing air cooling. The sequential arrangement of equipment of the production line is as follows: the heating furnace, the plate blank, the descaling box, the roughing mill, an intermediate blank, the finishing mill, a pre-straightening machine, an ultra-fast cooling unit, the thermal straightening machine, the first steel splitting rack, the open flame tempering furnace, the second steel splitting rack, a thick plate cooling bed and an intermediate plate cooling bed.

The invention provides a full-automatic heating production line for short aluminum bars and a method thereof. The full-automatic heating production line sequentially comprises an automatic feeding mechanism, a heating mechanism, a bar jacking mechanism arranged between the automatic feeding mechanism and the heating mechanism, a bar moving mechanism and an ejecting mechanism arranged in the heating mechanism; and the automatic feeding mechanism comprises a material frame, the short aluminum bars are arranged in the material frame, a manipulator is arranged above the material frame, a bar feeding mechanism is arranged on the side, close to the heating mechanism, of the material frame. According to the full-automatic heating production line for the short aluminum bars, a heating furnace in the heating mechanism adopts the mode that the multiple short aluminum bars are heated, double-segment circulating heating is conducted, and owing to uniform furnace temperatures, the short aluminum bars do not need to be subjected to homogenization treatment after being subjected to heating treatment through the full-automatic heating production line for the short aluminum bars; the bar moving mechanism adopts horizontal moving type bar moving, the short aluminum bars on the whole rise, fall and move by a fixed distance, and bar moving is smooth and steady, and malfunction is avoided; feeding adopts the servo manipulator, so that automatic feeding is achieved, and the length and quantity can be automatically calculated; and bar discharging adopts idler wheel bar discharging.

The invention relates to a full premixed combustion smelting method and smelting furnace for producing glass using the method, wherein the method consists of disintegrating the raw materials, mixing and loading into flame for full contact with the flame, thus realizing completely premixed combustion and smelting, the droplets formed in smelting fall into the smelting pool through colliding each other and forming shaped liquid. The disclosed method can increase utilization factor of heat energy substantially.

The invention discloses a heat treatment system used for producing ultrahigh strength steel. The technological layout of the system is that: (1) a quenching machine is arranged behind a roller-hearth quenching furnace; a long transporting roll table with a length of 30 to 35m is arranged behind the quenching machine; and an open-fire low-temperature roller-hearth tempering furnace is arranged behind the transporting roll table; (2) a steel plate is heated in the roller-hearth quenching furnace, and the temperature is maintained; (3) the quenching machine is configured as in a quenching mode; and the technological speed of the quenching machine is controlled at 5 to 6m/min according to the thickness of the steel plate, wherein the thickness of the steel plate is 8 to 60mm. (4) the steel plate is heated; the temperature is maintained; the steel is fetched and quenched; the quenched steel plate is places on the transporting roll table for self-tempering, wherein the self-tempering temperature is Ms to Mf (the specific temperature is determined according to the steel type); (5) when self-tempering is finished, the steel plate is delivered to the tempering furnace in time with high speed for carrying out carbon distribution, wherein the temperature is maintained; the steel plate is delivered forward according to a preset technological speed; (6) when a carbon distribution time is satisfied, the steel plate is fetched from the furnace in time to be air-cooled; (7) when the steel plate is processed through a Q+P process, the steel plate can be transported to another tempering furnace for tempering when necessary.

The invention relates to a novel heated-air circulation tempering furnace, and belongs to a medium-and-low temperature soft thermal treatment device for metal. The novel heated-air circulation tempering furnace comprises a feeding table, a furnace body and a discharging table, wherein the furnace body comprises an outer furnace shell, a furnace body heat preservation layer, an inner liner, and a blower and heating elements which are arranged on the furnace body; the blower is provided with an air suction inlet and an air outlet; a hot flow guide system is arranged below the air outlet; carrier rollers are arranged below the hot flow guide system; a first roller, a second roller and a third roller are arranged inside the feeding table; a fourth roller, a fifth roller, an out-furnace cold air blowing system and a speed reducer are arranged in the discharging table; and the furnace body is of a modular structure. The heated-air circulation tempering furnace has a unique structure of a heated-air circulation channel and is convenient for circulating heated air more uniformly so as to ensure the higher uniformity of the furnace temperature; the modular structure is adopted and each area is a module; and according to process characteristics of processed products, the modules can be added or reduced randomly so as to change the length of the furnace body to adapt to different thermal treatment processes.

The invention provides a heat accumulating type steel ladle baking system capable of remarkably reducing NOX and a baking method. The heat accumulating type steel ladle baking system capable of remarkably reducing NOX comprises a steel ladle, at least two combustors, a fuel gas subsystem, a combustion air system, a smoke exhaust subsystem, an air-fuel gas reversing valve and a control subsystem, wherein a heat retainer, at least one concentrated combustion nozzle and at least one light combustion nozzle are arranged in each combustor; and during baking, the fuel gas sprayed out of the concentrated combustion nozzles combusts concentratedly, and simultaneously, the fuel gas sprayed out of the light combustion nozzles combusts lightly. Compared with the prior art, the heat accumulating type combustion is combined with the concentrated combustion and the light combustion, so that the temperature in a furnace is very uniform, NOX pollutants are prevented from being generated, the maximum reduction amount can be higher than 70%, and the problem of high pollution due to the combustion is completely solved by virtue of the combustion manner.

A preparation method of a quartz ceramic hollow roll bar for toughened glass heating furnace relates to the technical field of quartz ceramic. A fused quartz raw material with the chemical purity that SiO2 is more than or equal to 99 percent is adopted; based on the mass percentage of granules and gradation, the fused quartz comprises 40 to 50 percent of quartz with granularity of 1 to 0.5 mm, 20 to 30 percent of quartz with granularity of 0.3 to 0.1 mm and 20 to 30 percent of quartz with granularity of less than 0.01 mm; and the quartz ceramic hollow roll bar is obtained by the steps of grinding materials, preparing colloid slurry, forming, drying and sintering. According to the preparation method, a gel casting process is adopted, so the aims of short forming time, accurate and consistent overall dimensions, smooth surface and uniform internal structure are fulfilled, the weight of the prepared quartz ceramic hollow roll bar is reduced by 20 to 30 percent compared with that of a quartz ceramic roll bar, the energy is saved and uniform furnace temperature is guaranteed.

The invention discloses a quick cooling method for a lithium iron phosphate steel band type reducing furnace, which comprises the following steps: adding lithium iron phosphate onto a steel band of the steel band type reducing furnace through a feeding section, then sintering the lithium iron phosphate through a pre-burning section and a sintering section, quickly cooling the sintered lithium iron phosphate, and discharging the quickly-cooled lithium iron phosphate through a discharging section to finish the whole sintering process, wherein the cooling rate is between 8.8 and 15.8 DEG C per minute. The quick cooling method for the lithium iron phosphate steel band type reducing furnace has large yield, and is convenient for process adjustment and quality control.

The invention discloses a railway electric motor brush and a preparation method thereof, belonging to the technical field of brush processing. The brush is prepared by two stages of production. One stage of production is prepared by heating and mixing carbon black, modified pitch and coal tar, roasting, and grinding to obtain a stage product after roasting is completed. Two-stage production is bymixing the first-stage product, carbon black, modified pitch and sulfur by heating, rolling, grinding, pressing, roasting, graphitizing, impregnating, finishing grinding, drilling and assembling to produce brushes. The invention also provides a preparation method of the electric brush. The performance uniformity of the electric brush is improved from 60% to 98%; The pull-out tension of the brush product can be increased by 2 to 3 times, up to 750kgf, the weight gain rate of the product is obviously increased, the weight gain rate is as high as 12%, the porosity is significantly reduced, and the porosity is up to 1%. The brush can meet the needs of the market. The brush is suitable for railway electric machines.

The invention belongs to the technical field of heat treatment processing equipment, and relates to an improved non-standard heat treatment cover furnace with a double-layer sealing structure. The cover furnace mainly comprises a furnace base, a furnace base cross supporting frame and a furnace cover, and is characterized in that: a double-layer sealing ring is arranged between the furnace base and the furnace cover; and an inner layer of the double-layer sealing ring is an asbestos packing, and an outer layer of the double-layer sealing ring is a silicon rubber ring. The cover furnace can meet the requirement on the mechanical property of a novel steel strip after the novel steel strip is annealed, is particularly suitable for annealing a steel strip made from a BSYE-N material, fills in the blank of the steel strip product in China, and eliminates the technical bottleneck which restricts the development of the technology. Compared with the traditional cover furnace, the cover furnace has the advantage that: production cost is greatly reduced.

This invention refers to aluminium alloy single bar quick heating furnace, which contains furnace body, burner, circulation fan and driving roller way, which features said furnace body has heating chamber in upper part and burning chamber in lower part, central part set with path, the driving roller path in heating chamber, said burning chamber separated by partition wall to from two burning chambers, left and right longitudinal air channel connected with two burning chambers, two burners set at outer ends of front and rear burning chambers, two circulation fans set at the top position corresponded to heating chamber. Said invention has high heating efficiency and low failure rate.

The invention provides a ceramic railing with high weatherability, and a preparation method thereof. Because of self-factors, when a ceramic railing is used, glaze-surface falling and cracks on parts of the structures can easily occur; under weather conditions with large temperature differences, glaze-surface bursting might occur, and normal application is severely influenced; during a firing procedures, because of uneven air flow, slow heat transfer and low heat exchange efficiency in a kiln, regular and controllable temperature gradient can hardly be formed longitudinally in a firing zone in the kiln, such that the firing period is prolonged. With the method provided by the invention, the technical problem is solved. According to the invention, a raw material formula is modified, and a local clay resource in Yunnan Province is adopted as a raw material. The formulas for a ceramic railing blank and a glaze are further optimized, and a firing process procedure is also modified, such that the weatherability of a finished product is improved. Indexes of performances such as water absorption rate, freezing resistance, quick-chilling resistance, quick-heating resistance and appearancequality of the ceramic railing product satisfy a construction colored glaze product standard JC/T765-2006.

The invention discloses a roller-hearth type plate continuous tempering furnace, comprising a furnace body, a loading device and an unloading device, wherein the loading device and the unloading device are arranged at two ends of the furnace body; the furnace body comprises a strong convection heating section and an open fire heating/holding section which is connected with the strong convection heating section; a hearth of the strong convection heating section is communicated with a hearth of the open fire heating/holding section; the furnace body is provided with a conveying roller which is used for conveying a plate; the conveying roller runs through the hearths of strong convection heating section and the open fire heating/holding section; the strong convection heating section is provided with a strong convection blowing and heating device which is used for circularly heating and blowing hot air; an open fire nozzle, a furnace gas disturbance fan and a hot air jet pipe are arranged in the open fire heating/holding section; the loading device comprises a loading roller which is connected with a feeding end of the conveying roller; and the unloading device comprises a discharge roller which is connected with a discharge end of the conveying roller. The roller-hearth type plate continuous tempering furnace disclosed by the invention is capable of achieving the multi-purpose function, and simultaneously is high in furnace temperature control accuracy.

This invention discloses a PLC-controlled intelligentized well-type electric furnace, which is composed of a furnace body, a furnace cover and a resistance heater. Besides, the electric furnace is also composed of a system for PLC-controlling of the load main circuit. The system performs zoning temperature control on the main circuit, and is composed of three programmable PID controllers, three integrated threephase electric power controllers and one temperature-controlling meter connecter. In each temperature control zone, a thermal couple is equipped to connect the programmable PID controller. The input side of the thermal couple is connected with the temperature-controlling meter connector, and the output side is connected with the integrated threephase electric power controller, and is connected with the main circuit in a serial-parallel mode through a temperature-controlling switch and a solid-state relay. The threephase electric power controller can collect the input signals from the programmable PID controller, and perform closed-loop control on the heating system. The well-type furnace has such advantages as rapid heating, uniform temperature distribution, low error and rapid cooling.

The invention belongs to the technical field of heating stoves and relates to a heating stove based on honeycomb ceramic heat accumulators. The heating stove based on the honeycomb ceramic heat accumulators comprises a stove body. A stove chamber is formed in the stove body. A flame outlet is formed in the upper end of the stove chamber. A protective sleeve is arranged in the flame outlet in an embedded mode. The first honeycomb ceramic heat accumulator and the second honeycomb ceramic heat accumulator are arranged in the protective sleeve in an embedded mode. The first honeycomb ceramic heat accumulator is located above the second honeycomb ceramic heat accumulator. The first honeycomb ceramic heat accumulator and the second honeycomb ceramic heat accumulator are separated through a supporting body, and a secondary combustion chamber is formed. The first honeycomb ceramic heat accumulator and the second honeycomb ceramic heat accumulator are each provided with a plurality of through holes formed in the vertical direction. The cross section area of each through hole of the first honeycomb ceramic heat accumulator is smaller than that of each through hole of the second honeycomb ceramic heat accumulator. Fire bars used for supporting fuel are arranged at the bottom of the stove chamber. The lower end of the protective sleeve is suspended above the fuel. A fuel feeding and first air distribution port, a second air distribution port and a third air distribution port are formed in the stove body. By the adoption of the heating stove based on the honeycomb ceramic heat accumulators, the fuel utilization rate is increased, the pollutant discharge amount is decreased, energy is saved, and environmental friendliness is achieved.

The invention belongs to the technical field of heat treatment processing equipment and relates to a nonstandard bell-type furnace. The nonstandard bell-type furnace comprises a furnace base, a furnace bottom cross supporting frame and a furnace bell. The nonstandard bell-type furnace is characterized in that base heating elements are distributed on the furnace base, and a corrugated cover plate is covered on the heating elements; the side surface of the furnace base is provided with an air inlet; a double-layer sealing ring and a water cooled jacket are arranged between the furnace base and the furnace bell; the top of the furnace bell is provided with a convection fan and a U-type pressure gauge; and a corrugated inner cover air guide barrel is arranged in the furnace bell. The nonstandard bell-type furnace can meet the requirement of novel steel belts on mechanical performance after annealing, is particularly suitable for the annealing of steel belts of BSYE-N materials, fills the blank of the steel belt products in China and eliminates the technical bottleneck restricting the development of the technology. Compared with that of a traditional bell type furnace, the production cost of the nonstandard bell-type furnace is greatly reduced.

The invention relates to a heat treatment furnace with a movable furnace cover and belongs to the technical field of heat treatment. The heat treatment furnace with a movable furnace cover is connected with a combustion system, a measurement and control system and a smoke evacuation system, and comprises a furnace stage, inside which two combustion chambers and a flue are vertically arranged, wherein the flue is positioned between the two combustion chambers and two ends of the combustions are equipped with burners. The upper surface of the furnace stage is provided with a movable furnace cover, two ends of which are equipped with fire doors. A heating chamber is disposed in the inner space of the furnace cover. And the heating chamber respectively communicates with the combustion chambers and the flue through open pores on the furnace stage. In comparison with car-type furnaces, the heat treatment furnace provided by the invention has advantages of light furnace cover, low mobile power of the furnace cover, good furnace seal performance, uniform furnace temperature, few burners, full combustion and the like. The thermal efficiency of the furnace reaches up to more than 36% through measuring and calculating.