83results about "Grates" patented technology

To provide a combustible material incineration facility equipped with one or more air injection devices having air injection ports that forcibly inject air or heated air toward the combustion section in order to incinerate combustible materials at high temperature and high speed. [Solution] The combustible material incineration equipment 100 of the present invention comprises a combustible material incineration stand 30 having a combustible material incineration stand surface 10 formed with a space between it and the ground and made of a plurality of steel materials 12 arranged at intervals, and left and right inclined stand sections 20 equipped with rod-shaped members arranged in a V-shape when viewed from the side so as to extend on both sides and upward, the rod-shaped members of the left and right inclined stand sections 20 being at least one of sliding, foldable and detachable, or a combination thereof, so that the protruding length can be adjusted, and the combustible material incineration equipment 100 is equipped with an air injection device 40 arranged around the combustible material incineration stand 20 and forcibly injecting air or heated air toward the combustible material burning section on the combustible material incineration stand surface 10.

The present disclosure is directed to a firebox basket for a barbeque grill or smoker. In one form, the present disclosure provides a grill comprising an ash depository, a firebox basket positioned in the grill above the ash depository; and a cooking rack positioned above the firebox basket. The firebox basket comprises: a support basket defining an internal area, the support basket comprising: a plurality of concentrically stacked rungs that define a side wall of the firebox basket; and a grate positioned at a bottom of the plurality of concentrically stacked rungs; and a plurality of ceramic pieces disposed within the support basket. The support basket is configured to support the plurality of ceramic pieces around the internal area of the support basket.

A furnace includes a combustion chamber, a fuel grate positioned within the combustion chamber, and a particle adapter removably positionable on the fuel grate. The fuel grate includes a plurality of first vent holes. The particle adapter includes a plurality of second vents sized and shaped to prevent passage of fuel particles. The particle adapter also includes a raised outer edge and a central bump having a height greater than that of the raised outer edge.

The invention relates to the technical field of boilers, in particular to an environment-friendly boiler which comprises a boiler body and a bearing bushing rotationally connected into the boiler body, an inserting and sliding fixing plate is slidably connected to the boiler body, the inserting and sliding fixing plate is slidably connected with the bearing bushing, and a port circular ring is fixedly connected to the boiler body. A partition plate is fixedly connected in the end opening circular ring and divides the end opening circular ring into an upper layer and a lower layer, a plurality of leaking holes are formed in the end opening circular ring, a supporting cavity is fixedly connected to the lower portion of the boiler body, an ash collecting box is slidably connected in the supporting cavity, and transmission gears are fixedly connected to the two ends of a bearing leaking plate. The two transmission worm wheels are in meshed transmission connection with a transmission rack, the boiler body is rotationally connected with a transverse moving lead screw, the transverse moving lead screw is in threaded connection with the transmission rack, the boiler body is fixedly connected with a limiting sliding column set, the limiting sliding column set is in sliding connection with the transmission rack, and the boiler body is rotationally connected with an extending cavity. The burner has the beneficial effect that comburent can be burnt quickly.

The utility model relates to the technical field of boiler fire grates, in particular to a novel fire grate which comprises a plate body, a first air passing groove is formed in the surface of the plate body, a circular cambered surface body is installed below the plate body, and lapping structures capable of being attached to the surface of a water pipe are installed on the two sides of the circular cambered surface body. The fire grate plate body is manufactured in a pouring mode to form an integral structure with a circular cambered surface, can be directly placed on a water pipe during installation, replaces a traditional welding mode, can effectively prevent the water pipe from being damaged and leaking water, is more convenient to install, and is convenient to install when the number of the fire grate plate bodies needs to be increased. The arc-shaped block and the arc-shaped body which are installed on the right side of the circular cambered surface body can be spliced with the other fire grate plate body so that the two arc-shaped bodies can be attached to each other, and a device installed below the fire grate plate body can achieve the heat dissipation or exhaust effect through the vent grooves.

The invention relates to the technical field of garbage incinerators, in particular to a rake type rotary mixing and stepped grate device which comprises a stepped laminated grate, an air supply slag scraping paddle, pushing shovels, crushing blades and a slag scraping component, the air supply slag scraping paddle is driven by driving equipment to rotate, then the air supply slag scraping paddle drives the pushing shovels to do circumferential rotation, and the crushing blades are driven by the crushing blades to do circumferential rotation; the material pushing shovel pushes the wastes on the stepped laminated grate to move; in the process that the material pushing shovel pushes the waste to move, the crushing blades penetrate through the crushing grooves, the caked waste is scattered and segmented under the action of the crushing blades and the material pushing shovel, and therefore the waste with the large size can be scattered, the scattered waste sequentially falls into the next layer of the stepped laminated grate, and the waste can be recycled. And meanwhile, large-size waste can be scattered, and the aim of improving the incineration efficiency is achieved.

The utility model discloses a nickel aluminum round wire fire bar which comprises a fixing ring, an annular fire bar body is arranged in the fixing ring, a rotating ring is arranged on the outer side of the fixing ring, a fixing mechanism is arranged between the fixing ring and the rotating ring, the fixing mechanism comprises an installation assembly and a fixing assembly, and the installation assembly and the fixing assembly are used in cooperation. And the mounting assembly comprises a fixing disc, the fixing disc is fixedly connected to the interior of the rotating ring, a sliding column is slidably connected to the interior of the rotating ring, and the outer side of the sliding column is sleeved with a spring. According to the nickel-aluminum round wire fire bar disclosed by the utility model, the annular fire bar is clamped and fixed between the fixed ring and the rotating ring through the arranged fixing mechanism under the tension action of the spring, compared with a fixing mode of welding and the like, the nickel-aluminum round wire fire bar is simpler and more convenient to install, meanwhile, when the fire bar is damaged and needs to be replaced, the replacement steps are simpler, and the replacement efficiency is improved. And replacement can be completed without the help of external tools, the structure is simple, and practicability is high.

The utility model relates to the field of fire grates and discloses an anti-blocking fire grate which comprises a hearth, a grate is fixedly connected to the middle of the inner wall of the hearth, a mounting hole is formed in the middle of the top of the grate and extends left and right, a plurality of ash leakage holes are formed in the front side and the rear side of the top of the grate, and the ash leakage holes are symmetrically distributed front and back. A rotating shaft is arranged in the mounting hole, the rotating shaft is in clearance fit with the mounting hole, the left end and the right end of the rotating shaft are rotationally connected with the left inner wall and the right inner wall of the hearth, a stirring rod is arranged in the ash leakage hole, the stirring rod is in clearance fit with the ash leakage hole, and the stirring rod is fixedly connected with the outer wall of the rotating shaft; the left end of an output shaft of the servo motor is fixedly connected with the right end of the rotating shaft. The stirring rod is driven by the servo motor to stir in the ash leakage holes, ash and fuel particles can be effectively prevented from blocking the ash leakage holes, and the grate is kept unblocked.

The invention discloses a biomass combustion device for improving the heating efficiency in a furnace by using circulation, and relates to the technical field of biomass combustion, the biomass combustion device comprises a combustion chamber, a conveying pipe is mounted on the left side of the combustion chamber, a conveying auger is mounted in the conveying pipe, and a connecting strip is mounted on the left side of the combustion chamber; and a driving mechanism is mounted on the support frame. According to the biomass combustion device capable of improving the temperature rising efficiency in the furnace through the circulation, the heat recovery cavity is formed, smoke generated by combustion of biomass fuel in the combustion chamber can be exhausted through the smoke exhaust pipe, heat in the smoke can be absorbed by the heat conduction pieces on the smoke exhaust pipe, and part of the heat in the smoke is left in the heat recovery cavity through the heat conduction pieces; the heating efficiency in the combustion chamber is improved; smoke and residual heat in the smoke exhaust pipe can be conveyed to the smoke recycling box, the induced draft fan pumps out the smoke in the smoke recycling box through the air inlet pipe, and then the smoke is conveyed into the combustion chamber through the air supply pipe, so that circulation is formed, and the temperature rising efficiency in the combustion chamber is further improved.

The gasification combustion fire grate comprises a fire grate body and a movable grate plate, the bottom wall of the fire grate body is provided with an air inlet ash falling hole, the movable grate plate is arranged on the inner bottom wall of the fire grate body, the movable grate plate is provided with a through hole, the through hole is communicated with the air inlet ash falling hole, and the air inlet ash falling hole is communicated with the air inlet ash falling hole. The movable grate plate can move to the communicating hole to be aligned with the air inlet ash falling hole so as to open the air inlet ash falling hole, or move to the communicating hole to be staggered with the air inlet ash falling hole so as to close the air inlet ash falling hole by the movable grate plate, natural combustion is performed in the fire grate body by opening the air inlet ash falling hole, and air inlet from the bottom of the fire grate body is stopped by closing the air inlet ash falling hole. And the movable grate plate is repeatedly pushed and pulled, so that the air inlet ash falling holes in the bottom of the fire grate body and the through holes in the movable grate plate form shearing action, and at the moment, ash in the fire grate body can be removed.

The utility model relates to household garbage incinerator equipment, in particular to a combined fire grate segment which specifically comprises a first fire grate segment assembly and a second fire grate segment assembly, the first fire grate segment assembly is detachably connected with the second fire grate segment assembly, the first fire grate segment assembly is located at the front end of the combined fire grate segment in the push-pull direction, and the second fire grate segment assembly is located at the rear end of the combined fire grate segment in the push-pull direction. The second fire grate segment assembly is located at the rear end of the combined fire grate segment in the push-pull direction, the two ends of the first fire grate segment assembly are the first end and the second end respectively, the two ends of the second fire grate segment assembly are the third end and the fourth end respectively, and the end face of the first end is provided with a first inclined face and a second inclined face which extend front and back. A third inclined face is formed between the top of the first fire grate segment assembly and the end face of the second end, a frustum protrusion is formed between the second inclined face and the third inclined face, and a through hole is formed in the third inclined face. The combined fire grate segment is convenient to replace after being partially abraded, and the replacement cost is lower.

A sealing device for an incinerator, and an incinerator. The incinerator comprises a water-cooled wear-resistant area (1) and a side wall water-cooled wall (3). The sealing device comprises a first comb-shaped plate (4) and a second comb-shaped plate (5); the first comb-shaped plate (4) is arranged in a gap between the side wall water-cooled wall (3) and the water-cooled wear-resistant area (1), and the first comb-shaped plate (4) is connected to the side wall water-cooled wall (3); the second comb-shaped plate (5) is connected to the water-cooled wear-resistant area (1), and the second comb-shaped plate (5) is arranged on the side of the water-cooled wear-resistant area (1) close to the side wall water-cooled wall (3); a sealing and thermal insulation material is filled between the first comb-shaped plate (4) and the second comb-shaped plate (5). By means of the arrangements, the gap between the side wall water-cooled wall (3) and the water-cooled wear-resistant area (1) of the incinerator is sealed, so as to improve thermal insulation efficiency, reduce flue gas leakage from the incinerator, and reduce ash accumulation below the water-cooled wear-resistant area (1) and the side wall water-cooled wall (3), thus facilitating on-site standardized production, and reducing the difficulty of on-site construction.

The utility model relates to the technical field of incineration fire grate segments, in particular to a garbage incineration fire grate segment which comprises a fire grate segment body, a mounting frame is fixedly connected to the lower surface of the fire grate segment body, positioning holes are formed in the surface of the mounting frame, a containing groove is formed in the surface of the fire grate segment body, and partition strips are placed in the containing groove. The number of the division bars and the number of the storage grooves are both five, the five division bars and the storage grooves are arranged at equal intervals, connecting rods are fixedly connected to the lower ends of the five division bars, a guide hole is formed in the inner wall of one storage groove, and a control rod is slidably connected to the interior of the guide hole; and one end of the control rod is fixedly connected with the surface of the parting strip. According to the scheme, the arrangement piece structure is improved, auxiliary conveying of garbage can be achieved, the conveying efficiency of the garbage is improved, and stable use of the garbage incinerator is facilitated.

The utility model relates to the field of fire grates, and discloses an anti-blocking fire grate structure which comprises a hearth, an ash discharge port is formed in the bottom of the front side wall of the hearth, a furnace door is installed on the inner wall of the ash discharge port, the furnace door is rotationally connected with the inner wall of the ash discharge port, the inner wall of the hearth is fixedly connected with a bottom plate, and the bottom plate is located at the top of the ash discharge port. A plurality of ash leakage holes are formed in the top of the bottom plate and are evenly arranged left and right, a movable frame is arranged below the bottom plate, guide columns are perpendicularly and fixedly connected to the four corners of the top of the movable frame, the four guide columns penetrate through the four corners of the bottom plate respectively, the guide columns are in sliding fit with the bottom plate, and cleaning knives are arranged under the ash leakage holes. And sliding holes are formed in the lower portions of the middles of the left side wall and the right side wall of the hearth correspondingly, and sliding columns are fixedly connected to the left side wall and the right side wall of the movable frame correspondingly.

Biomass heating system for burning biogenic fuel, comprising: a boiler with a combustion unit and with a heat exchanger (3); a control unit with a storage unit; at least one sensor that can detect the state of an ash removal device for cleaning combustion residues from the boiler; wherein the biomass heating system is configured such that the control unit can detect a blockage of the ash removal device by means of information received from the sensor.

This utility model discloses an adaptive dynamic grate tilt angle adjustment device for a municipal solid waste incinerator, relating to the field of incinerator technology. The device includes an incinerator, with an angle adjustment device and a base at the lower end of the incinerator. The angle adjustment device comprises a hydraulic cylinder, an adjustment module, and a laser rangefinder. The front end of the hydraulic cylinder is housed within a connecting seat and rotatably connected to a connecting rod within the connecting seat. An adjustment module is located on the upper side of the rear end of the base, and a laser rangefinder is located at the front end of the adjustment module. This solution addresses the problem that the grate tilt angle of most municipal solid waste incinerators is fixed, and the adjustment device requires manual adjustment, which is cumbersome and difficult to dynamically adjust in real time according to the characteristics of the waste.

Biomass solid fuel stove (1) comprising an access door (2) and a brazier formed by a bottom grate (4) and walls (3) characterized in that the bottom grate (4) is rotatable or sliding under the walls (3) and that said bottom grate (4) is connected to the access door (2) through connecting means (5,6) so that each time the access door (2) is opened, the connecting means (5,6) make the bottom grate (4) slide or turn under the walls (3).

A stove is provided that includes a combustion chamber, a fuel grate positioned within the combustion chamber, and a pellet adapter removably positionable on the fuel grate. The fuel grate includes a number of first ventilation holes. The pellet adapter includes a number of second ventilation holes sized and shaped to prevent passage of a fuel pellet. The pellet adapter also includes a raised outer rim and a central protuberance with a height greater than the height of the raised outer rim.

The present invention discloses a assembled air inlet grate and a low-nitrogen gasification combustion device. The assembled air inlet grate includes a grate plate and a plurality of hanging members. The plurality of hanging members are all arranged vertically and distributed circumferentially. On one side of the upper end of each hanging member away from each other, there is a hanging portion, and on one side of the lower end of each hanging member close to each other, there is a supporting portion. The grate plate is horizontally arranged among the plurality of hanging members and is supported on the supporting portions of the plurality of hanging members to jointly enclose a trough-shaped receiving pool. Biomass pellet fuel is used to be loaded in the receiving pool. The hanging portions at the upper ends of the plurality of hanging members are used to be hung on the inner wall of the furnace body. There are first air inlet holes penetrating the side wall of the receiving pool on the hanging member or between two adjacent hanging members, and there are second air inlet holes penetrating up and down between the upper ends of the hanging member or between the upper ends of two adjacent hanging members. The structure is simple, and the biomass pellet fuel can be pyrolyzed into low-nitrogen combustible gas in the receiving pool.

The utility model relates to the technical field of fire grates, and discloses a fire grate structure convenient for ash removal, which comprises a furnace bottom, a fire grate mechanism is arranged in an inner cavity of the furnace bottom, the fire grate mechanism comprises a fire grate body, an air guide port is arranged in the inner cavity of the fire grate body, a discharge port is arranged on the left side of the inner cavity of the fire grate body, and the discharge port is arranged on the right side of the inner cavity of the fire grate body. Limiting blocks are fixedly installed at the front end and the rear end of the fire grate body correspondingly, and a baffle is fixedly installed at the left end of the fire grate body. An ash removal mechanism is arranged at the top of the fire grate body and comprises an ash removal plate. By arranging the fire grate mechanism, normal functions of the fire grate can be guaranteed, furnace ash can be conveniently discharged through the discharge port, ventilation is guaranteed through the air guide port, combustion is facilitated, the air inlet amount can be increased, by arranging the ash removal mechanism and pulling the heat insulation sleeve, the furnace ash can be scraped out along the discharge port through the ash removal plate, material discharge is facilitated, a worker does not need to stretch into the furnace for cleaning, and the fire grate is simple and convenient to use.

The application discloses an industrial park distributed energy supply system, which comprises a combustion chamber, an outer shell installed on one side of the combustion chamber, a discharge chamber fixedly connected to the bottom surface of the combustion chamber, a treatment chamber installed on the bottom surface of the discharge chamber, a stirring mechanism arranged in the outer shell and a closing mechanism arranged on the front side of the outer shell and electrically connected with the stirring mechanism, two leakage plates are installed in the discharge chamber, a closing plate is slidably connected between the two leakage plates, a transmission mechanism is arranged between the closing plate and the closing mechanism, a driving mechanism is arranged on the bottom surface of the closing plate, a cleaning mechanism is installed on the closing plate, a dust falling mechanism is arranged on the discharge chamber, and a pressing mechanism is installed in the treatment chamber. The industrial park distributed energy supply system effectively guarantees the cleaning and use of equipment during energy generation and avoids heat loss.

The utility model discloses a garbage incinerator grate furnace guide wheel device, which relates to the technical field of garbage incinerators, comprises a first connecting shaft, a second transmission plate and a second connecting shaft, realizes cleaning of a filter screen by arranging a vibration mechanism, a rotating component and an impact assembly, and realizes cleaning of the filter screen by arranging a telescopic mechanism, a transmission component and a connecting assembly. A telescopic motor is started to drive a two-way telescopic shaft to rotate, so that a transmission block rotationally connected with the two-way telescopic shaft slides on a telescopic rod, a first transmission plate rotationally connected with a transmission shaft is driven to rotate, and a second transmission plate rotationally connected with a first connecting shaft rotates; the guide wheel device has the advantages that dust at the bottom of the supporting frame can be cleaned, the dust discharging efficiency of the guide wheel device is higher by arranging a vibration mechanism and a telescopic mechanism, and the dust is prevented from being accumulated at the bottom of the guide wheel device.

The utility model discloses a combustor and gas equipment, and relates to the technical field of combustion. The combustor comprises a shell, a plurality of fire rows and at least one temperature detection device, the fire rows are arranged on the shell side by side, and fire outlet holes are formed in the top faces of the fire rows so that a flame area can be formed above the fire outlet holes; wherein at least one fire grate is provided with a limiting bracket; the at least one temperature detection device is installed on the shell, and a detection part of the temperature detection device is limited in the flame area of the corresponding fire row through the corresponding limiting support. According to the technical scheme, the accuracy of flame temperature detection can be guaranteed, and the adjusting accuracy of the air-fuel ratio is improved.

An elastic reset device arranged in the middle of a grate plate is disclosed, which includes reset blocks, springs, sleeves and a guide plate. The reset blocks comprise a left reset block and a right reset block, the upper ends of the left and right reset blocks are partially overlapped, a folding angle α is provided at the overlapping portion and is not less than 45 degrees, and a ceramic fiber blanket is filled at the folding angle.

The utility model relates to the technical field of solid waste treatment fire grates, and provides a fire grate which comprises a furnace shaft, a plurality of fire bars and a plurality of fire grate segments, shaft penetrating holes are formed in the fire grate segments, and the furnace shaft is connected with the shaft penetrating holes in a nested mode; and the plurality of fire bars are connected with the plurality of fire grate segments. According to the fire grate, the furnace shaft and the fire grate segments are connected in the embedded mode, the area of the connecting portion of the furnace shaft and the fire grate segments is increased, connection is more stable, and the connecting portion of the furnace shaft and the fire grate segments can be prevented from being damaged due to stress; moreover, the solid waste is jointly supported by the multiple fire bars, meanwhile, the materials are turned over and conveyed downwards, airflow in the upper space and the lower space can be controllably circulated through gaps between the fire bars, the reaction effect of the materials can be improved, and the organization level of the material flow and the airflow can be improved; and in addition, the solid waste is jointly supported by the multiple fire bars, the contact area of the fire bars and the solid waste is reduced, and the solid waste can be prevented from adhering to the fire grate in the treatment process.

To provide an inflammable incineration facility equipped with one or two or more air injection devices each having an air injection port for forcibly injecting air or heated air toward a combustion part for incinerating a material to be burned at high temperature and high speed.SOLUTION: An inflammable incineration facility 100 includes a trestle 30 for inflammable incineration having a trestle surface 10 for inflammable incineration made of a plurality of steel materials 12 formed with a space part with a ground surface, and arranged at intervals, and a right and left inclined trestle part 20 provided with rod members arranged into a V shape in a side view so as to spread in both side directions and upward. The rod members of the right and left inclined trestle part 20 are formed so that the protruding length can be adjusted by one of sliding, folding, or detachable, or by a combination of these. An air injection device 40 is arranged around the trestle 30 for inflammable incineration for forcibly injecting air or heated air toward an inflammable combustion part on the trestle surface 10 for inflammable incineration.SELECTED DRAWING: Figure 1

Disclosed is a fire pit including a fire grate formed of sheet metal and disposed in a fire pit cavity and configured to support a combustible fuel thereon. The fire grate may include a perimeter edge, a center portion disposed substantially at the central axis, an array of grate ventilation holes through the sheet metal between the perimeter edge and the center portion. The grate ventilation holes may be configured to permit airflow into the cavity and to permit ash from burned fuel to pass from the cavity to a space below the fire grate. The grate may include a plurality of stiffening portions of the sheet metal, each stiffening portion being a portion of the sheet metal devoid of grate ventilation holes. The plurality of stiffening portions may extend in a direction between the center portion and the perimeter edge and may separate the array of grate ventilation holes into distinct segments.

The utility model discloses an anti-blocking fire grate structure which comprises two transmission shafts which are symmetrically arranged, two ends of each transmission shaft are respectively provided with a transmission wheel, a plurality of fire grate segments which are connected with one another in a chain mode are arranged around the transmission wheels on the two sides, and a plurality of gear teeth are arranged on the circumferential end faces of the transmission wheels at intervals. Gear holes corresponding to the gear teeth are formed in the two sides of each fire grate segment, every two adjacent fire grate segments are connected through a pin shaft, a cleaning assembly is arranged between the two transmission shafts and comprises an eccentric wheel and a cleaning block, the eccentric wheel is in transmission connection with the transmission shaft on one side, and the cleaning block is in transmission connection with the transmission shaft on the other side. The cleaning block is arranged at the bottom of the eccentric wheel and located above the lower side fire grate segment. The cleaning mechanism is synchronously connected with the transmission shaft, and the cleaning block enters and exits the ventilation opening in a reciprocating manner in the operation process of the fire grate segment, so that ash or other impurities clamped in the ventilation opening are cleaned, the fire grate segment is prevented from being blocked, and the production efficiency of a boiler is improved.

The utility model discloses a grate with a single air duct. The grate comprises a grate cap, a plurality of grate bodies, a base and ash discharge ribs, the multiple grate bodies are sequentially arranged from top to bottom, and the sizes of the grate bodies are gradually increased. The middles of the adjacent grate bodies are communicated to form inner cavities; the uppermost grate body is close to the grate cap, and the lowermost grate body is connected with the base; wherein a downward extending part is arranged on the peripheral side of the lower end of the grate cap; a first extension part and a second extension part are correspondingly arranged at the upper end and the lower end of the peripheral side of each grate body; the first extension part of the uppermost grate body is located on the inner side of the lower extension part, the first extension part of the lower grate body is located on the inner side of the second extension part of the upper grate body, and single air channels used for exhausting air are formed between the corresponding extension parts in parallel. According to the utility model, accumulation and blockage of ash in a single air duct can be reduced, gas can be quickly diffused to fill the inner cavity of the grate, gas distribution is facilitated, and the grate is suitable for pressurized air gasification and oxygen gasification gas stoves.

A downward mobile gasification boiler for surface gas-phase combustion and pyrolysis of biomass briquette is provided. The boiler includes a gasification combustion chamber, a gas combustion chamber, a stranding cage slag remover, a heat exchanger, a water jacket, an air duct and an air distribution system. The air duct connected with the air distribution system is arranged in the inner cavity of the wall surface of the gasification combustion chamber. The gas combustion chamber is arranged at the upper part of the gasification combustion chamber, and an air outlet is arranged in the middle to communicate the gas combustion chamber with the gasification combustion chamber. The lower part of a port of the gasification combustion chamber is provided with a twisting cage slag remover.