15results about How to "Improve calcination quality" patented technology

A movable feeding device of a lime double-hearth shaft kiln comprises an integral moving trolley, a moving trolley guide rail, a combined portal frame, a rotary hopper supporting ring beam, a hopper supporting structure, a hopper rotation driving mechanism, a rotary hopper and a charging bell, the integral moving trolley walks on the moving trolley guide rail in a reciprocating mode, and the rotary hopper supporting ring beam is installed on the integral moving trolley. A hopper supporting structure and a hopper rotation driving mechanism are arranged on the rotary hopper supporting ring beam, the rotary hopper is erected on the hopper supporting structure and driven by the hopper rotation driving mechanism to rotate, the combined portal is fixedly connected with the rotary hopper supporting ring beam, and a charging bell lifting driving device is installed on the combined portal. The charging bell is arranged at a discharging opening in the bottom of the rotary hopper, a lifting shaft protection sleeve is arranged in the middle of the rotary hopper, and a transmission mechanism of the charging bell is connected into the lifting shaft protection sleeve in a penetrating mode. According to the utility model, two-way movable feeding of the kiln top can be realized, limestone materials are uniformly heated, the operation process is environment-friendly, and the operation is safe.

The application discloses a multi-channel shaft kiln for calcining magnesite, wherein a distributing vehicle and a discharging device are located at the top and bottom of a kiln body. The kiln body is provided with a preheating section, a calcining section and a roasting section from top to bottom, and square strip-shaped channels are arranged in the kiln. A combustion chamber is arranged in the furnace wall on both sides of the calcining section with a width of 40-80 cm, the combustion chamber is built by hollow integral combustion bricks, the combustion chamber is communicated with the calcining section by cross-distributed through holes, the through hole outlet is downwardly inclined, and an inclined convex block is arranged at the top. The lower part of the roasting section is provided with an upper collecting opening and a lower expanding opening structure, an air pressure pipe is arranged in the inclined brick of the upper collecting opening, the opening of the air pressure pipe is downwardly inclined and communicated with the roasting section, and the lower expanding opening is matched with the upper semicircular surface of the discharging device. The middle part of the upwardly inclined distributing main pipe of the distributing vehicle is communicated with the branch pipe which is inclined and changed in direction, and a change valve is arranged in the main branch pipe. The application provides a comprehensive solution of the shaft kiln with high calcining quality, energy saving, low investment and long service life for calcining magnesite, and can also be used for high-quality calcining of small-particle materials.

This utility model provides a green silicon carbide calcination and salt washing equipment with dust prevention function, belonging to the technical field of green silicon carbide calcination and salt washing equipment. It includes an installation mechanism comprising a fixed frame, a drive power supply adapted to and installed on the side surface of the fixed frame, a mounting plate fixedly connected to the inner surface of the fixed frame, and a protective component fixedly installed on the surface of the mounting plate; and an operating mechanism comprising an operating tank fixedly installed in the center of the fixed frame, a stirring component adapted to and installed on the surface of the operating pipe, a feeding tank connected to the side wall of the stirring component, a feeding motor adapted to and installed on the side surface of the feeding tank, a fixing rod fixedly installed on the side surface of the operating tank, a lifting pipe fixedly connected to the end of the fixing rod, and a suction pump adapted to and installed at the end of the lifting pipe. This utility model effectively suppresses dust overflow and improves the working environment through the setting of the protective component and the sealed operating tank structure; the combined use of the insulation layer and the heating layer improves thermal energy utilization and reduces energy consumption.

The utility model relates to a distributing device of a smoke exhaust type lime shaft kiln, and belongs to the technical field of lime kiln equipment in the metallurgical industry. According to the technical scheme, a kiln shell (3) is of a cylindrical structure with the upper end closed, a round lime shaft kiln feeding port (2) is formed in the center, a chimney (1) is arranged on the periphery, a preheating zone, a calcining zone and a cooling zone are sequentially arranged in the kiln shell (3) from top to bottom, a material storage zone is arranged on the preheating zone, and a plurality of circles of vertically-arranged smoke exhaust pipes (6) are arranged in the material storage zone with the center of the kiln shell (3) as the circle center. The lower end of each circle of smoke exhaust pipe (6) is communicated with the preheating zone, a smoke exhaust material surface (9) is formed between the end surfaces of the lower ends of each circle of smoke exhaust pipe (6), the end surface of the upper end of each circle of smoke exhaust pipe (6) is higher than a limestone high material level material surface (7), the smoke exhaust pipes (6) are connected together through tie bars, and the smoke exhaust pipes (6) and the kiln shell (3) are connected together through tie bars. The utility model has the beneficial effects that the airflow distribution in the kiln is more uniform, and the product calcining quality is good.

The utility model relates to the technical field of calcining furnaces, and discloses a curved surface hearth type efficient heat conduction calcining furnace structure which comprises a base and a shell, the shell is fixedly connected to the upper side of the base, the left side of the shell is rotationally connected with a front side door, the left side of the front side door is rotationally connected with a motor, and the driving end of the motor is fixedly connected with a support. A rotating assembly is arranged in the front side door, a feeding opening is fixedly connected to the upper side of the front side door, a ventilation pipe is fixedly connected to the upper side of the feeding opening, a fixing assembly is designed on the upper side of the ventilation pipe, and a hose is fixedly connected to the upper side of the ventilation pipe. According to the utility model, the reverse rotation design is adopted, so that materials are prevented from being locally overheated under bidirectional disturbance, and the heat conduction and calcination quality is obviously improved; the ventilation pipe is of a convenient dismounting structure and is matched with the induced draft fan to form directional airflow, exhaust gas discharge and heat flow convergence are accelerated, and efficient and stable operation of equipment is guaranteed.

The present invention relates to the technical field of high-temperature calcining equipment of crucible furnace, and discloses a high-temperature calcining equipment and a method for using the same, comprising a calcining furnace body, the bottom surface of which is fixedly connected to a cooling box, a heat preservation mechanism is arranged on the outside of the calcining furnace body, a fixing mechanism is arranged on the top of the calcining furnace body, the heat preservation mechanism comprises a fixing frame, the inner wall of the fixing frame is fixedly connected to the outer surface of the calcining furnace body, and the inner wall of the fixing frame is fixedly connected to a heat preservation plate. The high-temperature calcining equipment and the method for using the same, by providing a multi-way pipe, the extracted heat can be transmitted through the multi-way pipe, and the one-way valve can prevent the hot gas diverted from flowing back during use, and the multi-way pipe guides the transmitted heat into the interior of the fixing frame through the connecting pipe, so that under the action of the fixing frame and the heat preservation plate, the heat inside the calcining furnace body can be effectively reduced from being lost to the outside through the outer wall.

The invention discloses a method for calcining limestone in a pulverized coal rotary kiln, and the processing method comprises the following steps: A, raw material preparation: selecting limestone with excellent quality and low impurity content as a main raw material, selecting high-quality pulverized coal as a fuel, the heat value of the pulverized coal is not lower than 5000 kcal / kg, the ash content is not higher than 10%, the limestone is crushed to the particle size of 0-5 mm, impurities and particles larger than 5 mm in the limestone are removed through screening equipment, the pulverized coal is dried to enable the water content of the pulverized coal to be lower than 1%, and then the pulverized coal is ground to the particle size of 0-0.074 mm so as to improve the combustion efficiency of the pulverized coal. Through raw material preparation, the quality of limestone and pulverized coal is ensured, a good foundation is provided for the subsequent calcination process, the uniformity of the materials can be improved through crushing and screening, the agglomeration and blockage phenomena are reduced, the combustion efficiency of the pulverized coal can be improved through drying and grinding, and the energy consumption is reduced.

The utility model relates to the technical field of high-temperature calcination of powder, and discloses an indirect heating type high-temperature atmosphere shaft furnace, which comprises a feeding device, a heating device and a heating device, the pushing device is connected with the feeding device and used for pushing the materials to the material storage pipe body; the material storage pipe body is a vertical cylindrical container and is internally used for accommodating and conveying materials; the heating rods are distributed in the axial direction of the material storage pipe body and used for providing a high-temperature heat source. And the heating rods are axially distributed along the material storage pipe body, so that the heating efficiency is improved, the materials are uniformly and efficiently heated, and the energy utilization efficiency is remarkably improved. Due to the arrangement of heat preservation cotton and a heat insulation layer, heat loss is effectively reduced, the temperature in the furnace is more stable, and the calcination efficiency is further improved. Meanwhile, different temperature intervals can be formed in the furnace due to the design of the thermal insulation layer, so that the requirements of different materials on temperature are met, and the applicability of the equipment is enhanced.

This application relates to the field of new energy material preparation technology, and in particular to a high-efficiency and energy-saving calcination device for recycled ferric phosphate, comprising a base, a calcination mechanism at the top of the base, and a discharge mechanism at the bottom of the calcination mechanism. This invention utilizes components such as a rotary kiln shell, a heating furnace shell, an electric heating module, and electric heating tubes. Through the annular heating cavity formed between the heating furnace shell and the rotary kiln shell, and the electrical connection between the electric heating module and the electric heating tubes, the electric heating tubes can uniformly heat the calcined material within the rotary kiln shell via heat transfer oil. The heat transfer oil circulates and conducts heat within the annular heating cavity, avoiding uneven local temperatures. This achieves the effect of fully and uniformly calcining the screened recycled ferric phosphate raw material through efficient heat conduction, improving calcination quality and efficiency.

The invention relates to the technical field of calcining furnaces, and discloses a pot-type calcining furnace based on heat circulation, the pot-type calcining furnace comprises a calcining assembly, the calcining assembly comprises a furnace body, the furnace body is internally provided with an adjusting assembly and a detection assembly, the detection assembly is arranged below the adjusting assembly, the adjusting assembly comprises a stirring rod, and the stirring rod is arranged below the furnace body. And the stirring rod is arranged at the central position of the furnace body. The discharging amount is controlled according to the detection result of the temperature sensor, so that it is guaranteed that the actual heat of the calcination space meets the calcination heat needed by the materials, the higher the detection result of the temperature sensor is, the larger the needed discharging amount is, the more volatile gas is generated when the petroleum coke materials are calcined, and the more volatile gas is generated. The smaller the amount of volatile gas entering the vent pipe at the position is, the temperature deviation is automatically adjusted and corrected under the action of heat transfer, the uniformity and stability of the temperature in the calcining furnace are ensured, and the calcining quality is improved.

This application discloses a desulfurized gypsum circulating calcination system, including a stirring and circulating device with a stirring inlet and a stirring outlet, a fluidized bed furnace connected to the stirring outlet, an air distribution plate set at the bottom of the fluidized bed furnace, a blower facing the air distribution plate and used to blow the material inside the fluidized bed furnace, and a material collection mechanism connected to the outlet of the fluidized bed furnace. The fluidized bed furnace is provided with a first circulation port, which is connected to the stirring inlet of the stirring and circulating device. By setting a material circulation path between the fluidized bed furnace and the stirring and circulating device, the reflux and reprocessing of insufficiently calcined material can be realized, which effectively improves the fluidization state of the material, calcination efficiency and finished product quality, and enhances the stability of system operation.

The high-temperature coke calcining and crushing device comprises a calcining furnace, the top of the calcining furnace is open and abuts against a liftable furnace cover, the furnace cover is communicated with a feeding hopper, a double-roller crushing mechanism is installed on the upper portion of the feeding hopper, a jacket is arranged on the outer side of the calcining furnace, and a hollow ball is detachably arranged at the inner bottom of the calcining furnace. A double-shaft-extension motor is arranged in the upper portion of the hollow ball, a driving bevel gear fixedly sleeves an output shaft on the lower side of the double-shaft-extension motor, a rotating shaft is fixedly connected to an output shaft on the upper side of the double-shaft-extension motor, and a plurality of transverse stirring shafts are rotationally arranged in the middle of the hollow ball; one end of the transverse stirring shaft is fixedly sleeved with a driven bevel gear vertically meshed with the driving bevel gear, a plurality of square stirring frames are fixedly connected to the peripheral side of the part located outside the hollow ball, net-shaped stirring pieces are fixedly connected to the inner sides of the square stirring frames, and the top end of the rotating shaft extends out of the hollow ball and is fixedly connected with a square rotating frame. According to the invention, the integration of crushing and calcining can be realized, and the overall processing efficiency and quality are better.

This application provides a calcination apparatus and a method for introducing gas into the calcination apparatus. The calcination apparatus includes a kiln and a sagger disposed within the kiln. The kiln also includes a side air inlet and a roller conveyor. The roller conveyor drives the sagger to move along a first direction. The sagger includes two legs spaced apart along the first direction, forming an opening between the two legs that communicates with the interior of the sagger. The side air inlet is configured to open when it aligns with the opening in the first direction and close when it aligns with a leg. This application allows the gas introduced through the side air inlet to be directly supplied to the ternary material inside the sagger, reducing gas waste and improving gas utilization. Furthermore, it facilitates the replacement of waste gas accumulated near the sagger, improving gas flow within the sagger and thus enhancing the calcination quality of the ternary material.

The invention relates to the field of calcination, and particularly provides a calcined sand turning mechanism and a calcination device. The calcined sand turning mechanism comprises a base; the outer cylinder is horizontally arranged along the axis of the outer cylinder, the outer cylinder is rotatably arranged on the base, and the side wall surface of the outer cylinder is wavy; the inner cylinder is rotatably arranged in the outer cylinder and is coaxial with the outer cylinder, and the side wall surface of the inner cylinder is wavy; the springing devices are telescopically arranged on the side wall of the inner cylinder; the multiple springing devices are arranged in the circumferential direction of the inner cylinder at intervals and are perpendicular to the side wall face of the inner cylinder. According to the scheme, the side walls of the inner cylinder and the outer cylinder of the calcined sand turning mechanism are both arranged to be wavy, and the telescopic springing device is arranged on the side wall surface of the inner cylinder, so that in the calcining process, turning of materials in the inner cylinder and the outer cylinder is more irregular; therefore, the situation that large-size materials are accumulated on the upper portion and small-size materials are deposited on the lower portion is weakened, the calcination quality is improved, and the calcination efficiency is improved.

A calcination method and an intermittent kiln belong to the field of inorganic non-metallic material processing. The calcination method includes: obtaining a first reference condition; calcining the processing object, and during the calcination process, continuously collecting and correspondingly obtaining a first working condition; and controlling the calcination condition according to the trigger condition. The scheme can shorten the analysis cycle of the calcination process and improve the analysis quality.