71results about "Vertical furnaces" patented technology

The application provides a heat comprehensive utilization system based on a lime kiln and a combustion beam, belongs to the technical field of calcining equipment, and comprises a beam body, a cooling oil circulation pipeline, a steam pipeline and a combustion air pipeline; the cooling oil circulation pipeline is in communication with an oil cooling cavity. A fan is arranged on the combustion air pipeline, the fan can make gas flow to form an air flow; the steam pipeline is in communication with a gas cooling cavity, a steam valve is arranged between the steam pipeline and the gas cooling cavity, the steam pipeline further has a tempering branch in communication with a hollow cavity, and a tempering valve is arranged on the tempering branch; the combustion air pipeline is in communication with the gas cooling cavity; a combustion valve is arranged between the combustion air pipeline and the gas cooling cavity, the combustion air pipeline further has a combustion branch in communication with the hollow cavity, and an air inlet valve is arranged on the combustion branch. The heat comprehensive utilization system based on the lime kiln and the combustion beam provided by the application realizes energy saving to the maximum by means of liquid and gas collaborative cooling.

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.

The present application relates to a double hearth kiln, comprising two kiln bodies, a feeding system, a waste gas discharging system, a fuel supply system, a discharging system and a control system. The two kiln bodies are built closely together, each of the kiln bodies is provided with a feeding port at the upper part and a discharging port at the lower part; a support beam is arranged between the calcination zone and the cooling zone of the kiln body, the two kiln bodies share one support beam, a flue port is arranged between the two kiln bodies, the flue port is arranged below the support beam; the support beam is a steel structure, lined with a heat preservation layer and a wear-resistant layer; the support beam is an inner sleeve type steel structure, provided with a channel for the circulation of cooling medium; the upper part of the support beam is provided with a ridge type structure. The double hearth kiln provided by the present application builds the two kiln bodies closely together, greatly shortening the length of the flue channel originally arranged between the two kiln bodies, which is conducive to reducing the construction cost.

A blast furnace lining has an upper stack portion, an intermediate bosh portion, and a hearth portion, and can have a bottom pad portion. At least part of the hearth portion has an outer layer of a first refractory material having a thermal conductivity of at least about 16 W / m-k and an inner layer of a second refractory material having an iron erosion index of less than 1% and a thermal conductivity of at least about 8 W / m-K. Also provided are a blast furnace lined with the blast furnace lining, and a method for lining a blast furnace.

A charging device and method for a vertical reduction furnace, belonging to the field of high-temperature vacuum reduction technology, includes a charging cylinder and an operating rod. A receiving component is hinged to the bottom of the operating rod. The receiving component has a multi-piece structure. During charging, the operating rod and the receiving component are located inside the charging cylinder, with the free end of the receiving component abutting against the inner wall of the charging cylinder, covering the inner cross-section of the charging cylinder. During discharge, the charging device is located between the reduction tank and the central tube. The receiving component extends from the bottom of the charging cylinder under the thrust of the operating rod, and the free end of the receiving component falls under gravity, discharging the material from the bottom of the charging cylinder. This invention, by setting up a charging cylinder and using an operating rod with a hinged receiving component inside the charging cylinder, ensures that the material is released in an orderly manner from the bottom to the opening during charging, with a controllable release speed. This ensures the integrity of the pellets, avoids the impact force caused by the charging drop, reduces the friction between the pellets and the central tube, facilitates the lifting of the central tube, and ensures smooth slag discharge.

A method for detecting the height of a molten material with higher detection accuracy than conventional methods is provided. A molten material height detection method for detecting the molten material height in a blast furnace, which measures vibrations at one or more positions on the furnace wall in the lower part of the blast furnace, analyzes the vibration frequency to identify the vibration intensity of a frequency that is correlated with the vibration generated by introducing gas into an inlet in the lower part of the furnace, and detects the molten material height using a corrected vibration intensity that removes the influence of the amount of bosh gas generated by the introduction of gas from the vibration intensity of the identified frequency.

The application provides a hydrogen-nitrogen-based shaft furnace direct reduction ironmaking system and process method, and the ironmaking system comprises a shaft furnace, the shaft furnace has a reduction zone, a constant pressure zone and a cooling zone from top to bottom; a cooling and heat recovery unit, the cooling and heat recovery unit has a low-temperature process gas supply pipe connected with the lower part of the cooling zone, and a heat recovery pipe connected with the constant pressure zone and the upper part of the reduction zone; and a process gas circulation treatment unit, the process gas circulation treatment unit has a process gas circulation pipe connected with the top flue gas outlet of the shaft furnace and the reduction zone, and the process gas circulation pipe is provided with a first dust remover, a dehydrator and a nitrogen removal device. The application can solve the problems of uneven gas distribution and low heat utilization efficiency in the existing hydrogen-nitrogen-based shaft furnace process, effectively control the nitrogen concentration in the process, efficiently recover and utilize the system energy, and optimize the product cooling and the heat distribution in the furnace.

The present disclosure discloses a system (500) for measuring thickness along a length of a conduit (111). The system includes a guide tube and a device (300) positioned in the guide tube (370). The device is configured to displace along the guide tube into the conduit. The device includes a plurality of links (100) pivotally connected to each other. Further, at least one carrier link (304) is positioned between at least a pair of the plurality of links and is configured to accommodate at least one sensor (340). Additionally, at least one protrusion (330) extends from the at least one carrier link and is configured to support a portion of the at least one sensor, to contact the conduit for measuring thickness of the conduit. Furthermore, a control unit (400) is communicatively coupled to the device (300) to operate the device and measure thickness along the length of the conduit.

The utility model discloses a circulating ventilation device for improving the material melting stability of a shaft kiln, which comprises a shaft kiln body, a preheating zone, a calcining zone and a cooling zone are sequentially arranged in the shaft kiln body from top to bottom, and the bottom of the cooling zone is communicated with a ventilation pipeline through an air inlet. The upper end of the ventilation pipeline communicates with an air outlet in the top of the preheating zone, and one end of the right side of the ventilation pipeline is connected with a frequency conversion fan. The circulating ventilation system is arranged, hot air exhausted by the cooling belt is used for preheating cold air, heat recycling is achieved, the energy utilization efficiency is improved, energy consumption in the production process is reduced, the frequency conversion draught fan and the flow adjusting valve on the ventilation pipeline can accurately adjust the ventilation quantity and the air quantity of all the air spraying openings, and the production efficiency is improved. And the uniformity of ventilation in the kiln is ensured, so that materials can be uniformly heated in the calcining process, the stability of material melting is effectively improved, and the improvement of the product quality is facilitated.

The utility model relates to the polycrystal silicon production technical field especially, and it is a kind of novel silicon core structure, silicon core subassembly and reduction furnace structure, the silicon core adopts whole tapering structure or ladder type structure;The whole tapering structure specifically refers to: from the top to bottom of silicon core, the cross section size of silicon core continuously decreases along the axial direction;The ladder type structure specifically refers to: from the top to bottom of silicon core, the silicon core includes first silicon core section and second silicon core section connected in turn, and the cross section size of first silicon core section is greater than the cross section size of second silicon core section. Through the novel silicon core structure, silicon core subassembly and reduction furnace structure, can effectively avoid the abnormality such as molten silicon, black inclusion of silicon core in the growth process.

A method of producing clinker includes placing a pre-clinker mixture comprising a source of CaO into a starting material feed port in a vertically- oriented reaction chamber of a vertical reactor. The method includes placing a gaseous combustion mixture into the combustion mixture inlet. The method includes combusting the gaseous combustion mixture within the vertical reactor to heat the pre-clinker mixture, release CO2 therefrom, and form the clinker therefrom. The method also includes removing the clinker from the product exit port.

The vertical furnace-vertical cooling machine combined hot air circulation system comprises a vertical furnace, a vertical cooling machine, a waste heat boiler, a circulating air pipe and a circulating air fan, the vertical furnace is connected with the vertical cooling machine and the circulating air fan through the circulating air pipe, the vertical cooling machine is connected with the waste heat boiler through the circulating air pipe, the circulating air fan is connected with the waste heat boiler through the circulating air pipe, and the waste heat boiler is connected with a generator set through a steam pipeline; the vertical furnace discharges the sintered ore pellets from the calcination of the ore powder, the vertical cooling machine stores and cools the discharged ore pellets, hot waste gas generated in the cooling process of the vertical cooling machine is transported to the waste heat boiler through the circulating air pipe, part of the hot waste gas in the waste heat boiler is transported to the vertical furnace and the vertical cooling machine through the circulating air fan, and the other part of the hot waste gas is transported to the generator set through the steam pipeline; the waste heat can be recovered to reduce the fuel consumption of coal gas and natural gas; and the waste heat is maximally recovered to generate electricity, so that double benefits of self-use and external supply are realized.

The invention relates to an injection nozzle (1) and a method for operating a metallurgical furnace.

The present invention provides a tuyere comprising a conical hollow tuyere body having an inner surface and an outer surface. The present tuyere extends along a first axis from an inlet end to an opposite outlet end. The tuyere body has a tip of the tuyere at the outlet end and a conical connection surface at the inlet end. The conical connection surface is configured to engage a conical seat of a tuyere holder or a tuyere cooler. Advantageously, the tuyere further comprises a corrugated portion on the outer surface of the tuyere. The corrugated portion comprises at least one recess having an open curved contour and a surface surrounding the at least one recess. The corrugated portion is arranged and configured to support the charged material and form a scaffold for the charged material during the operation of the metallurgical furnace.

The invention relates to a plasma torch (1) and a use of a plasma torch (1).

The utility model discloses a discharge structure of cupola, including the furnace body, the detachable cover body is engaged with the furnace body upper end, the side wall of furnace body is located at the same level height and is opened with the clear residue mouth and the flow guide groove mouth respectively, the flow guide plate one end is through the hinge shaft and is connected with the iron notch swing, the atomizing pipe is installed to the flow guide plate top along the length direction, the back of flow guide plate is fixed with two groups of side plates symmetrically, and the slide bar is horizontally erected between two groups side plates, and the outer wall of furnace body is equipped with the rotation mechanism of drive sliding block along the slide bar reciprocating sliding. The utility model discloses a flow guide plate and sliding block, slide bar etc. component, and the operator can real -time adjustment flow guide plate's inclination angle, thereby flexible control iron liquid from the iron notch and flow out the section area and flow rate, and then can accurate regulation pouring parameter according to the process requirement of different castings, effectively avoided the pouring quality fluctuation of traditional device because of the flow rate unadjustable, promoted the consistency and the pass rate of pouring finished product.

The present invention relates to a furnace having an inner surface (2) comprising copper. The inner surface (2) comprises at least one steel insert (1), the at least one steel insert (1) creating a protrusion extending from the inner surface (2). The present invention also relates to a cooling element (17) for a furnace comprising at least one steel insert (1) creating a protrusion extending from the cooling element (17). The present invention also relates to a method for generating an autogenous protective layer on the inner surface (2) of a furnace and to the use of the furnace in a direct iron reduction process, electric smelting process, electric reduction process, flash smelting process, flash converting process, bath smelting process or bath converting process.

The utility model relates to calcining furnace feeding field discloses a vertical calcining furnace prevents jamming ration screw feed device, including the transmission support frame for bottom support, the top left side fixed connection of transmission support frame has the support connecting rod, the top fixed connection of support connecting rod has the rubbing crusher jar, the inside rotatory connection of rubbing crusher jar has the rotary rod, the bottom fixed connection of rotary rod has first bevel gear, the inside rotatory connection of transmission support frame has the rotary rod, the outside fixed connection of rotary rod has transmission spiral, the left side fixed connection of rotary rod has second bevel gear, the meshing connection between first bevel gear and second bevel gear, the bottom right side fixed connection of rubbing crusher jar has the unloading frame body, the inside mounting of unloading frame body has intermittent unloading subassembly. In the utility model, improve the efficiency of raw material combustion, improve material heating uniformity, improve raw material rubbing uniformity, avoid the jam of spiral.

This invention refers to a technically and economically feasible process for recovery of metallic and non-metallic relevant contents from mining residues, particularly the bauxite residue, by using it in its whole. Such process route uses energy from microwaves, assisted leaching and logic sequencing of steps that allow a technically and economically feasible removal of components from the bauxite residue, particularly the residue from Bayer process. This invention still refers to a microwave reactor that is appropriate to perform the above-mentioned process, as well as to a method for heating a mining product.

The present application relates to the technical field of metal magnesium production, and particularly relates to a metal magnesium vertical reduction furnace loading structure and method, wherein the loading structure comprises a spherical charger, the spherical charger is provided with a magnesium vapor overflow hole, the spherical charger is filled with pellet material, a plurality of spherical chargers are connected by steel ropes one by one, and the plurality of spherical chargers are arranged in a reduction tank during processing of the reduction furnace. The spherical charger is filled with pellet material, and the spherical charger is arranged in the reduction tank, so that the problem of difficulty in magnesium vapor overflow, low reduction efficiency and slag sticking caused by falling and crushing of the pellet material when the pellet material is directly poured into the reduction tank is solved.

The present invention relates to a furnace comprising a wall having an inner surface (2) comprising a plurality of bricks (102) and / or compressible ramming mass (103) and a plurality of first steel inserts (104). The first steel inserts (104) are arranged between the bricks (102) and / or compressible ramming mass (103). The present invention also relates to a cooling element comprising a plurality of bricks (102) and / or compressible ramming mass (103), a plurality of first steel inserts (104), a method for generating an autogenous protective layer on an inner surface (2) of the furnace and to the use of the furnace in a direct iron reduction process, electric smelting process, electric reduction process, flash smelting process, flash converting process, bath smelting process or bath converting process is provided.

The present application relates to the technical field of metal magnesium production, and particularly relates to a continuous discharging mechanism and method of a metal magnesium reduction furnace, comprising a reduction tank, a grading mechanism, a supporting mechanism and a discharger, a plurality of grading mechanisms are stacked in the reduction tank, the bottom grading mechanism is connected with the supporting mechanism, and the grading mechanism is used for collecting magnesium vapor; the supporting mechanism comprises a material blocking baffle and a supporting piece, the supporting piece is located at the bottom of the grading mechanism and is embedded with the material blocking baffle, the width of the material blocking baffle is greater than the width of the supporting piece, the sidewall of the discharger is provided with a slide, and when the supporting piece is located at the bottom of the slide, moving outward along the horizontal direction can separate the material blocking baffle and the discharger. The continuous operation of the magnesium reduction furnace is realized by setting the reduction tank, the grading mechanism, the supporting mechanism and the discharger, the supporting mechanism with the material blocking baffle and the supporting piece is designed, the discharging operation during the continuous operation of the magnesium reduction furnace is improved, the cooperation degree is high, the continuous discharging operation is smooth, and the operation efficiency is improved.

The application relates to the technical field of cooling equipment, in particular to a shaft furnace water beam water system which comprises a mounting body, a cooling tower, a water distribution pool, a total water supply pipeline, a total water return pipeline and a plurality of small water beams; a water pump is arranged in the water distribution pool, one end of the total water supply pipeline is communicated with a water outlet end of the water pump, a plurality of branch water supply pipelines are arranged on the total water supply pipeline in communication, the plurality of branch water supply pipelines are respectively communicated with water inlets of the plurality of small water beams; a water outlet of the total water return pipeline extends into the cooling tower, a plurality of branch water return pipelines are arranged on the total water return pipeline in communication, water inlets of the plurality of branch water return pipelines are respectively communicated with water outlets of the plurality of small water beams. The application detects water inlet flow and water outlet flow of each small water beam through the mode of independently arranging electromagnetic flowmeters at water inlets and water outlets of each small water beam.

A sintering furnace can have a housing, one or more heating elements, and a transport assembly. Each heating element can be disposed within the housing and can subject a heating zone to a thermal shock temperature profile. Through the transport assembly, a substrate having one or more precursors thereon can be moved through an inlet of the housing to the heating zone, where the substrate is at a first temperature of at least 500 °C for a first period of time. The transport assembly can then move the substrate having one or more sintered materials thereon from the heating zone and from an outlet of the housing.

The utility model provides a kind of APT solid waste residue smelting waste recovery with shaft furnace, comprising: shaft furnace body and movable base plate, reaction chamber is integrally formed in the inside of shaft furnace body, and the periphery of reaction chamber inside shaft furnace body is combustion chamber, and the bottom side of shaft furnace body is provided with notched, and movable base plate is along notched and enters the bottom of reaction chamber.This utility model is moved by controlling walking car to carry out walking work, and drives movable base plate to slide, and the part of original movable base plate located at the bottom of reaction chamber is moved to the outside of shaft furnace body, and at the same time, another part on movable base plate enters below reaction chamber as the new bottom of reaction chamber, which is convenient for workers to clean the residual waste residue on the movable base plate moved outside, and at the same time, it is convenient for reaction chamber to refill, to enter next smelting process, to improve efficiency.

The present invention also relates to a parallel flow regenerative (PFR) vertical kiln (1) for burning and cooling materials such as carbonate rock, the kiln having two shafts (2) that can be operated alternately as a combustion shaft (2a) and as a regenerative shaft (2b) and are connected to each other via a connecting channel (19), wherein: each shaft (2) includes a preheating zone (21) for preheating the material, a combustion zone (20) for burning the material and a cooling zone (22) for cooling the material in the direction of material flow; each shaft (2) has an exhaust gas outlet (6) for discharging exhaust gas from the shaft (2); and the PFR vertical kiln (1) has at least one cooling gas conduit (44) for guiding cooling gas from the cooling zone (22) to the preheating zone (21). The present invention also relates to a method for burning materials such as carbonate rock in a parallel-flow regenerative vertical kiln (1) having two shafts (2), the shafts operating alternately as combustion shafts and as regenerative shafts and connected to each other via a connecting channel (19), wherein: material flows through a material inlet (3) into a preheating zone (21) for preheating the material, a combustion zone (20) for burning the material, and a cooling zone (22) for cooling the material, in order to reach a material outlet (40); cooling gas is introduced into the cooling zone; exhaust gas is discharged from one of the shafts (2) via an exhaust gas outlet (6); and the cooling gas is guided to the preheating zone (21) via a cooling gas pipe (44).

The present invention relates to a tuyere stock comprising a valve adapted to control the flow of a gas having a temperature of at least 800 °C into a furnace, the valve comprising (a) a valve body having a longitudinal axis and an inner wall defining a flow path for the gas along the axis, the flow path having a cross-sectional area perpendicular to the axis; (b) a trim assembly comprising multiple shutter elements and a drive assembly adapted to reversibly displace the multiple shutter elements through the inner wall of the valve body into the flow path in the plane of the cross-sectional area, the cross-sectional area of the flow path being concentrically reduced when the multiple shutter elements are displaced into the flow path.

This invention provides a radiant calcining kiln, belonging to the field of calcining kiln technology. It includes a feeding device for lifting materials into the kiln; a calcining kiln for calcining the materials, comprising a preheating zone for preheating the materials, a calcining zone for calcining the materials, and a cooling zone for cooling the calcined materials; and a waste gas treatment system for treating the waste gas generated during combustion. This invention can calcine small materials with a diameter less than 20mm, solving the problems of easy nodule formation, poor permeability, and low utilization rate and resource waste in the calcination of small particles. During use, nodule formation is prevented, reducing the difficulty of production operations, and the heat from combustion can be fully utilized, achieving energy conservation and emission reduction. Through radiant heat transfer, the materials do not directly contact the flame, resulting in uniform heating, a low rate of undercooked materials, and no open flame inside the kiln, thus producing less ash and resulting in higher purity clinker.