KR20040053596A - Gate apparatus for controling the quantity of raw materials discharged from low chute - Google Patents

Gate apparatus for controling the quantity of raw materials discharged from low chute Download PDF

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Publication number
KR20040053596A
KR20040053596A KR1020020080741A KR20020080741A KR20040053596A KR 20040053596 A KR20040053596 A KR 20040053596A KR 1020020080741 A KR1020020080741 A KR 1020020080741A KR 20020080741 A KR20020080741 A KR 20020080741A KR 20040053596 A KR20040053596 A KR 20040053596A
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South Korea
Prior art keywords
lower chute
fixed
chute
shaft
raw materials
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KR1020020080741A
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Korean (ko)
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KR100928989B1 (en
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노상근
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주식회사 포스코
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Publication of KR20040053596A publication Critical patent/KR20040053596A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0075—Regulation of the charge quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/04—Sintering

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE: A gate apparatus for controlling the quantity of raw materials discharged from lower chute is provided on which rotational open and shut type gates mounted on the lower chute of storage bin is mounted to prevent non-uniformed discharge of fuel and raw materials so that the fuel and raw materials are uniformly fired in sintering layer. CONSTITUTION: The gate apparatus comprises a pair of driving cylinders(31) movably installed at both sides of a front part of the lower chute of storage bin; rotation shafts(38) an end part of which is fixed to a connector(34) by pin(40), and which are rotationally mounted on bearings(36) fixed to front and rear parts of both sides of the lower chute, wherein the connector is movably fixed to driving shaft(32) of the driving cylinders; and a pair of rotational open and shut type gates(35) on a rear surface of which a plurality of shaft fixtures(39) are formed in such a way that the rotation shafts pass through the shaft fixtures and fixed by pin(40), and which are installed at both sides of discharge port of the lower chute, wherein the driving cylinders comprise a corrugated cover that is inserted into the driving shaft to prevent adhesion of foreign materials.

Description

절출량을 조절하는 하부슈트의 게이트 장치{GATE APPARATUS FOR CONTROLING THE QUANTITY OF RAW MATERIALS DISCHARGED FROM LOW CHUTE}GATE APPARATUS FOR CONTROLING THE QUANTITY OF RAW MATERIALS DISCHARGED FROM LOW CHUTE}

본 발명은 절출량을 조절하는 하부슈트의 게이트 장치에 관한 것으로서, 보다 상세하게는 소결용 연원료 저장조에 입조된 연원료를 정량 절출설비를 운전하여 절출할 때, 상기 저장조 하부슈트에 장착되는 회전개폐식 게이트를 장착하여 연원료의 불균일한 절출을 방지함으로써 소결층 내에 균일한 소성이 이루어질 수 있도록 하기 위한 절출량을 조절하는 하부슈트의 게이트 장치에 관한 것이다.The present invention relates to a gate device of a lower chute for adjusting the cutting amount, and more particularly, the rotation is mounted on the lower chute of the storage tank when the raw material entered into the sintering raw material storage tank is cut out by operating a quantitative cutting facility. It relates to a gate device of the lower chute to adjust the amount of cut so that a uniform firing can be made in the sintered layer by mounting an openable gate to prevent uneven cutting of the raw material.

일반적으로, 도 1에 도시된 바와 같이, 소결광 제조공정 중 소결용 연원료를 소결광 성분 품질에 적합하게 배출하도록 다수의 저장조(1)에 입조시킨 다음, 하부에 장착된 사각슈트(1)를 연원료를 배출하게 되며,In general, as shown in Figure 1, during the sintering ore manufacturing process, the raw material for sintering is granulated in a plurality of reservoirs (1) so as to suit the quality of the sintered ore component, and then the square chute (1) mounted at the bottom is opened. To discharge the raw materials,

상기 사각슈트(1)를 통하여 배출된 연원료는 컨베이어식 정량절출기(3)를 통하여 수송 벨트컨베이어(5)로 정량 절출하게 된다.The raw material discharged through the square chute (1) is quantitatively cut out to the transport belt conveyor (5) through a conveyor type metering machine (3).

상기 저장조(2)에 연원료를 최초 입조하는 경우, 사각슈트(1)와 정량 절출기(3)의 사이공간으로 연원료가 일부 비산되면서 낙하되어 주위 환경을 오염시키고, 입조되는 연원료의 중량이 정량 절출기(3)에 충격을 가함으로써 절출기(3) 오작동에 따라 연원료가 수송 벨트컨베이어(5) 상에 불균일하게 적재되어 소결조업시 원료소성 상태가 불균일하게 이루어짐으로써 소결광 생산 및 품질저하의 원인이되는 등 소결조업에 악영향을 미치고 있다.When the first raw material is granulated in the storage tank 2, the raw material is partially scattered into the space between the square chute 1 and the quantitative extruder 3 to contaminate the surrounding environment, and the weight of the raw material to be granulated. By impacting the quantitative extruder (3), the raw material is unevenly loaded on the transport belt conveyor (5) due to the malfunction of the extruder (3), resulting in uneven raw material firing during sintering operation. It has a detrimental effect on the sintering industry, such as causing a decrease.

상기와 같은 문제점을 해결하기 위한 종래방법으로는. 도 2에 도시된 바와 같이, 상기 저장조(2)에 연원료를 최초 입조하기 전에 하부슈트(1)의 전후부에 설치된 고정용 브래킷에 높이 조정용 스크류(21)를 나사결합한 다음, 이의 하단부에 플레이트 댐퍼(20)를 고정하여 슈트(1) 하부 절출구를 막아 정량 절출기(2)와 사이공간이 형성되도록 하여 정량 절출기(3)의 부하율 조정을 하게 되며,In the conventional method for solving the above problems. As shown in FIG. 2, before first entering the fuel raw material into the reservoir 2, the height adjusting screw 21 is screwed into the fixing bracket installed at the front and rear of the lower chute 1, and then the plate at the lower end thereof. The damper 20 is fixed to block the lower opening of the chute 1 so that a space therebetween is formed between the metering extruder 2 and the load ratio of the metering extruder 3 is adjusted.

그런 다음, 상기 플레이트 댐퍼(20)를 해체하여 정량 절출기(3)가 정상운정되도록 하고 있다.Then, the plate damper 20 is dismantled so that the metering cutter 3 is normally operated.

상기와 같은 종래의 정량 절출기(3) 부하율 조정작업은 사각슈트(1) 외부에서 2~3명의 작업자가 협동하여 중량물의 플레이트 댐퍼(20)를 체결하고, 외부로 취외하는 작업을 반복하고 있기 때문에 작업인원 및 작업시간이 많이 소요되어 연료 저광조(2) 2개 중 1개만 사용하는 시간이 길어지면서 사용하는 연료의 입자 및 수분변화가 심하게 변화되면서 2개의 저광조(2)를 사용 할 때 보다 소결대 내의 소성상태가 불균일하게 되어 소결광의 생산성이 저하되고 소결품질이 저하되는 문제점이 반복적으로 발생되고 있다.In the conventional fixed-quantity feeder (3) load ratio adjustment work, two to three workers cooperate outside the square chute (1) to fasten the plate damper (20) of heavy weight, and repeat the operation to take out to the outside Therefore, when the number of working people and working hours are high, and the time for using only one of the two fuel low light tanks (2) becomes longer, the particle and water change of the fuel used are changed so much when two low light tanks (2) are used. The problem of the non-uniform firing state in the sintering zone is that the productivity of the sintered ore is lowered and the sintering quality is reduced.

상기와 같은 문제점을 해결하기 위하여, 본 발명은 저장조의 하부슈트에 회전개폐식 게이트를 장착하여 최초 연원료 장입에 따른 정량 절출기의 충격을 방지하고, 소결조업이 계속 진행되면서 발생되는 정량 절출기의 부하편차를 조정함으로써 연원료의 불균일한 절출을 방지함과 도잇에 소결층 내에 균일한 소성이 이루어질 수 있도록 하기 위한 절출량을 조절하는 하부슈트의 게이트 장치를 제공하는데 그 목적이 있다.In order to solve the above problems, the present invention is equipped with a rotary switchgear gate in the lower chute of the storage tank to prevent the impact of the quantitative extruder according to the initial fuel feed, and the sintering operation of the quantitative extruder generated while continuing It is an object of the present invention to provide a gate device of a lower chute that adjusts the amount of cut out so as to prevent uneven cutting of the raw material by adjusting the load deviation and to allow uniform firing in the sintered layer.

도 1a 및 도 1b는 연원료를 저장하는 저광조 및 정량 절출설비를 도시한 측면 및 정면 개략도;1A and 1B are side and front schematic diagrams illustrating a low light tank and a quantitative cutting facility for storing fuel;

도 2a 및 도 2b는 슈트 하부에 장착되어 절출량을 조절하는 종래의 장치를 도시한 측면도 및 정면도;2A and 2B are side and front views of a conventional apparatus mounted on the bottom of the chute to adjust the amount of cutout;

도 3a는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치가 슈트에 장착된 상태를 도시한 정면도;Figure 3a is a front view showing a state in which the gate device of the lower chute adjusting the amount of cut in accordance with the present invention mounted on the chute;

도 3b는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치를 분리하여 확대 도시한 정면도;Figure 3b is an enlarged front view showing the gate device of the lower chute to adjust the amount of cut-out according to the present invention;

도 4는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치를 분리하여 확대 도시한 측면도;Figure 4 is an enlarged side view of the gate device of the lower chute to adjust the amount of cut in accordance with the present invention;

도 5는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치가 개폐되는 상태를 도시한 측면도;Figure 5 is a side view showing a state in which the gate device of the lower chute opening and closing adjustment amount according to the invention;

도 6은 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치가 개폐되는 상태를 도시한 정면도이다.Figure 6 is a front view showing a state in which the gate device of the lower chute to adjust the amount of cut in accordance with the present invention.

♠도면의 주요부분에 대한 부호의 설명 ♠♠ Explanation of symbols for the main parts of the drawing ♠

2:저장조 1:하부 사각슈트 31:구동실린더 34:연결대 36:베어링2: Storage tank 1: Lower square chute 31: Drive cylinder 34: Connecting rod 36: Bearing

38:회전샤프트 39:샤프트고정구 35:회전개폐식 게이트38: rotary shaft 39: shaft fixture 35: rotary opening and closing gate

상기한 목적을 달성하기 위하여, 본 발명은 저장조의 하부슈트의 양측 전방부에 유동가능하도록 한 쌍의 구동실린더와; 상기 구동실린더의 구동축에 유동가능하도록 고정되는 연결대에 단부가 핀 고정되어 상기 하부슈트 양측 전후방부에 고정 설치된 베어링에 회전가능하도록 장착되는 회전 샤프트와; 상기 회전 샤프트를 관통시켜 핀 고정시킬 수 있는 다수의 사프트 고정구가 후면에 형성되어 상기 하부슈트 배출구의 양측에 설치되는 한 쌍의 회전개폐식 게이트로 구성되는 것을 특징으로 하는 절출량을 조절하는 하부슈트의 게이트 장치를 제공한다.In order to achieve the above object, the present invention includes a pair of drive cylinders to be flowable to both front portions of the lower chute of the reservoir; A rotating shaft having an end pin fixed to a connecting rod fixed to the driving shaft of the driving cylinder, the rotatable shaft being rotatably mounted on a bearing fixed to both front and rear sides of the lower chute; A plurality of shaft fasteners that can be pinned by penetrating the rotary shaft is formed on the rear side of the lower chute to adjust the cutting amount, characterized in that consisting of a pair of rotary opening and closing gates installed on both sides of the lower chute outlet Provide a gate device.

또한, 본 발명은 상기 구동실린더는 구동축에 삽입된 이물질 부착방지용 주름커버를 포함하여 구성되는 것을 특징으로 하는 절출량을 조절하는 하부슈트의 게이트 장치를 제공한다.In addition, the present invention provides a gate device of the lower chute to adjust the cutting amount, characterized in that the drive cylinder comprises a wrinkle cover for preventing the adhesion of foreign matter inserted into the drive shaft.

이하, 첨부된 도면을 참조하여 본 발명의 구성을 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention.

도 3a는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치가 슈트에 장착된 상태를 도시한 정면도이고, 도 3b는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치를 분리하여 확대 도시한 정면도이며, 도 4는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치를 분리하여 확대 도시한 측면도이다.Figure 3a is a front view showing a state in which the gate device of the lower chute adjusting the amount of cut in accordance with the present invention is mounted on the chute, Figure 3b is separated by expanding the gate device of the lower chute adjusting the amount of cutout in accordance with the present invention 4 is an enlarged side view of the gate device of the lower chute for adjusting the cutting amount according to the present invention.

도 3a 및 도 3b, 도 4에 도시된 바와 같이, 본 발명은 먼저, 저장조(2)의 하부 사각슈트(1)의 양측 전방부 일정높이에 실린더 고정대(29)를 고정 설치한 다음, 상기 실린더 고정대(29)애 실린더 브래킷(30)을 볼트 고정하게 된다.As shown in Figures 3a, 3b, 4, the present invention, first, the cylinder holder 29 is fixed to the fixed height of the front side of both sides of the lower square chute 1 of the reservoir 2, and then the cylinder The cylinder bracket 30 is fixed to the bracket 29 by bolts.

상기 실린더 브래킷(30)에는 본 발명의 장치를 구동시키는 구동실린더(31)가 유동가능하도록 핀 고정되어 체결되어지며,The cylinder bracket 30 is pinned and fastened so that a driving cylinder 31 for driving the device of the present invention is movable.

상기 구동실린더(31)의 구동축(32)은 정면도에서 보면, 사각슈트(1)의 외부로 경사지도록 확장되어지며, 상기 구동실린더(31)는 유압식, 전동식, 공압식 모두 적용 가능하다.The drive shaft 32 of the drive cylinder 31 is extended to be inclined to the outside of the square chute 1 when viewed from the front view, the drive cylinder 31 is applicable to all of the hydraulic, electric, pneumatic.

상기 화장된 구동축(32)에는 이물질 부착방지를 위한 러버재질의 주름커버(32a)가 삽입된 다음, 단부에 체결구(33)가 고정되며,The creme cover 32a of a rubber material for preventing adhesion of foreign substances is inserted into the cosmetic drive shaft 32, and then a fastener 33 is fixed to an end thereof.

상기 체결구(33)에는 유동가능하도록 축 연결대(34)가 핀결합하게 되며, 상기 축 연결대(34)에는, 도 4에 도시된 바와 같이, 회전샤프트(38)가 핀(40) 고정되어진다.A shaft connector 34 is pinned to the fastener 33 so as to be movable, and as shown in FIG. 4, a rotation shaft 38 is fixed to the shaft connector 34. .

상기 회전샤프트(38)는 상기 사각슈트(1)의 양측 전후방부에 각각 고정된 베어링 고정대(37) 하부에 체결되는 베어링(37)에 양단부가 삽입되어 회전가능하도록 설치되며,The rotary shaft 38 is installed so that both ends are inserted and rotatable in the bearing (37) fastened to the lower bearing holder 37 fixed to each of the front and rear portions of the square chute (1),

상기 전후방부의 베어링(37)에 일단부가 삽입되기 전에 회전개폐식 게이트(35)의 후면부에 다수 고정된 샤프트 고정구(39)에 삽입되는데,Before one end is inserted into the bearing 37 of the front and rear parts, the shaft is inserted into the shaft fixing part 39 fixed to the rear part of the revolving gate 35.

상기 샤프트 고정구(39)와 회전샤프트(38)가 만나는 부위에는 고정핀(40)이 삽입되어 상기 회전개폐식 게이트(35)가 회전가능하도록 구성된다.A fixing pin 40 is inserted into a portion where the shaft fixture 39 and the rotating shaft 38 meet, so that the rotary opening and closing gate 35 is rotatable.

상기와 같은 구동관계로 구성되는 회전개폐식 게이트(35)는 상기사각슈트(1)의 배출구를 양분하도록 한 쌍으로 설치되는 것이 특징적 구성이다.Rotational opening and closing gate 35 is configured in a pair as described above to bifurcate the outlet of the square chute (1).

이하, 본 발명의 작용에 관하여 상세하게 설명한다.Hereinafter, the operation of the present invention will be described in detail.

도 5는 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치가 개폐되는 상태를 도시한 측면도이고, 도 6은 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치가 개폐되는 상태를 도시한 정면도이다.5 is a side view illustrating a state in which the gate device of the lower chute adjusting the cut-out amount according to the present invention, Figure 6 is a view showing a state of opening and closing the gate device of the lower chute adjusting the cut-out amount according to the present invention. One front view.

도 5 내지 도 6에 도시된 바와 같이, 본 발명에 따른 절출량을 조절하는 하부슈트의 게이트 장치는 저장조(2)가 연원료를 완전히 불출하여 레벨 제로 상태가 되면, 구동실린더(31)의 구동축(32)이 확장되어, 도 5의 (B)도 및 도 6의 (C)도와 같이, 회전개폐식 게이트(35)가 사각슈트(1)의 배출구를 완전히 폐쇄시키게 된다.As shown in Figures 5 to 6, the gate device of the lower chute to adjust the amount of cut according to the present invention, when the reservoir 2 is completely discharged the raw material to the level zero, the drive shaft of the drive cylinder 31 Reference numeral 32 extends so that the rotational closing gate 35 completely closes the outlet of the square chute 1, as shown in Figs. 5B and 6C.

저장조(2)에 최초 연원료가 입조되는 경우에는, 정량 절출기(3)에 직접적인충격이 전달되지 않도록 10~20% 범위로 게이트(35)가 개방되도록 구동실린더(31)를 작동시키며,When the first fuel is granulated in the reservoir 2, the drive cylinder 31 is operated to open the gate 35 in a range of 10 to 20% so that a direct shock is not transmitted to the quantitative extruder 3,

상기와 같이, 정량 절출기(3)의 부하율에 따라 게이트(35)가 열리는 개도위치의 조정작업이 구동실린더(31)의 동작반복됨으로써 저장조(1)에 최초 입조할 때 발생되는 정량 절출기(3)의 충격 및 연원료의 비산을 방지하고,As described above, the adjustment operation of the opening position at which the gate 35 is opened in accordance with the load ratio of the metering cutter 3 is repeated by the operation of the driving cylinder 31, so that 3) to prevent the impact and scattering of fuel raw materials,

상기 정량 절출기(3)의 부하율 변동이 발생되면 부하율 기준에 맞추어 회전개폐식 게이트(35)가 단계적으로 개방 또는 폐쇄되는 동작이 반복되어진다.When the load rate variation of the fixed-quantity extruder 3 is generated, the operation of opening or closing the rotary opening / closing gate 35 step by step in accordance with the load rate criteria is repeated.

상술한 바와 같이, 본 발명의 회전개폐식 게이트(35)는 저장조(1)에 연원료가 최초 입조하는 경우에는 완전히 폐쇄되어 정량 절출기(3)를 보호하고, 연원료를불출할 때는 정량 절출기(3)의 부하량에 따라 적합하게 배출되도록 개도정도를 제어함으로써 일정량의 연원료가 절출되어 소성상태가 균일하게 조업이 진행되기 때문에 소결광 품질안정을 기할 수 있으며, 분진비산을 억제하여 환경오염을 방지할 수 있다.As described above, the rotary switch gate 35 of the present invention is completely closed when the raw material is first granulated in the storage tank 1 to protect the quantitative feeder 3, and when releasing the fuel, the quantitative feeder By controlling the opening degree so that the discharge amount is appropriately discharged according to the load of (3), it is possible to stabilize the quality of sintered ore because the operation of plasticity is uniformly carried out by cutting a certain amount of fuel, and to prevent dust pollution by preventing dust scattering. can do.

Claims (2)

저장조(2)의 하부슈트(1)의 양측 전방부에 유동가능하도록 한 쌍의 구동실린더(31)와;A pair of drive cylinders 31 so as to be movable to both front sides of the lower chute 1 of the reservoir 2; 상기 구동실린더(31)의 구동축(32)에 유동가능하도록 고정되는 연결대(34)에 단부가 핀(40) 고정되어 상기 하부슈트(1) 양측 전후방부에 고정 설치된 베어링(36)에 회전가능하도록 장착되는 회전 샤프트(38)와;The pin 40 is fixed to the connecting table 34 which is fixed to the drive shaft 32 of the drive cylinder 31 so as to be rotatable to the bearing 36 fixed to both front and rear sides of the lower chute 1. A rotating shaft 38 mounted; 상기 회전 샤프트(38)를 관통시켜 핀(40) 고정시킬 수 있는 다수의 사프트 고정구(39)가 후면에 형성되어 상기 하부슈트(1)의 배출구의 양측에 설치되는 한 쌍의 회전개폐식 게이트(35)로 구성되는 것을 특징으로 하는 절출량을 조절하는 하부슈트의 게이트 장치.A plurality of shaft fasteners 39 which can penetrate the rotating shaft 38 to fix the pins 40 are formed on the rear side thereof and are provided on both sides of the outlets of the lower chute 1, respectively. Gate device of the lower chute to adjust the amount of cutting, characterized in that consisting of. 제1항에 있어서,The method of claim 1, 상기 구동실린더(31)는 구동축(32)에 삽입된 이물질 부착방지용 주름커버(32a)를 포함하여 구성되는 것을 특징으로 하는 절출량을 조절하는 하부슈트의 게이트 장치.The drive cylinder (31) is a gate device of the lower chute to adjust the amount of cutting, characterized in that it comprises a wrinkle cover (32a) for preventing the adhesion of foreign matter inserted into the drive shaft (32).
KR1020020080741A 2002-12-17 2002-12-17 Gate device of lower chute to control the amount of cut KR100928989B1 (en)

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KR20010001767U (en) * 1999-06-30 2001-01-26 이구택 Scale discharging device associated with duct hopper of electrode arc furnace
KR200212631Y1 (en) * 2000-09-22 2001-02-15 포항종합제철주식회사 stem exclusion apparatus for cylinder road
KR200254469Y1 (en) * 2001-08-02 2001-12-01 주식회사 곰레미콘 lemicon low slump manufactured goods production concretehopper gate structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108931137A (en) * 2017-05-27 2018-12-04 中冶长天国际工程有限责任公司 For spreading device, spreading system and the burning machine of rim charge and cloth of meeting an urgent need
CN108931137B (en) * 2017-05-27 2023-09-01 中冶长天国际工程有限责任公司 Device for spreading edge materials and emergency material distribution, spreading system and roasting machine

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