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1. 发明专利

JP2000239721A DEVICE FOR CHARGING PELLET INTO ROTARY-HEARTH TYPE REDUCTION FURNACE 失效
公开(公告)号：JP2000239721A
公开(公告)日：2000-09-05
申请号：JP4209699
申请日：1999-02-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIOKA HIRONORI , TERAMOTO HISAO , HIRATA KOICHI , YAMANE TAKASHI , SUEDA SHIGEKI
IPC分类号： C21B13/10 , F27B9/16 , F27B9/38
摘要： PROBLEM TO BE SOLVED: To provide a pellet charging device, with which the pellet to be treated can uniformly be supplied into a rotary hearth type reduction furnace without developing the breakage of the pellet. SOLUTION: A cone-trapezoidal rotary drum 21 is disposed at the upper part of the rotary hearth 12 in the reduction furnace and the pellet 11 of the material to be treated is supplied into the side surface 21c of the rotary drum through a hopper 22 from the upper part. The rotary drum is disposed by inclining the center axis so that the upper part of the this side surface 21c becomes the horizontal state and the inclination of the conical surface-like side surface 21c is set so that the circumferential speed in each point at the upper part of the side surface 21c equalizes to the shifting speed of the rotary hearth at just below wach point. In this way, when the pellet supplied onto the side surface of the rotary drum from the hopper is dropped onto the rotary hearth while sliding the side surface of the rotary drum, the pellet is uniformly piled on the rotary hearth.

2. 发明专利

JPH0871713A TUNDISH FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH0871713A
公开(公告)日：1996-03-19
申请号：JP21260794
申请日：1994-09-06
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAKAJIMA HIROSHI , YAMANE TAKASHI , SUEDA SHIGEKI
IPC分类号： B22D41/015 , B22D11/10 , B22D41/18 , B22D41/36
摘要： PURPOSE: To prevent the clogging of a slide gate caused by the solidification of molten steel by sufficiently preheating the slide gate for adjusting flow rate arranged at the lower part of a nozzle for pouring the molten steel. CONSTITUTION: Gas piping 20 supplying the combustion gas is arranged in a stopper nozzle 21 constituting the stopper for opening/closing the nozzle for pouring the molten steel in a tundish for continuous casting, and a nozzle for burner communicated with the gas piping 20 is arranged at the tip part. The combustion gas supplied from this gas piping 20 is burnt at the tip part to generate flame and the slide gate for adjusting the flow rate at the lower part of the nozzle for pouring the molten steel can directly be preheated with this flame. By this method, it is prevented that the molten steel is solidified at the slide gate.

3. 发明专利

JPH07290204A COOLING ROLL FOR CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH07290204A
公开(公告)日：1995-11-07
申请号：JP8961994
申请日：1994-04-27
申请人： MITSUBISHI HEAVY IND LTD
发明人： TANAKA KISABURO , YAMAMOTO KEIICHI , TAKATANI HIDEAKI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To provide a cooling roll for continuous casting apparatus, in which stress loaded on an end part seal material of a cooling water passage arranged in a cylindrical cooling member is reduced. CONSTITUTION:The cooling roll is constituted with a cylindrical rigid member 13, cylindrical cooling member 11 and thermal resistant member 10, and the cooling member 11 has plural cooling water passages 20 bored so as to penetrate in the axial direction. The opening hole at the end part of the cooling water passage 20 is sealed by joining the end part seal material 21. The end surface at the outer peripheral side of the cylindrical rigid member 13 is projected from the end surface at the inner peripheral side and the thickness X at the end part is thinner than the thickness X' at the center part so as to be easily deformed. By this constitution, the load accompanied with the thermal deformation loaded on the end part seal material 21 is reduced. The end part seal material 21 is made to be easily deformed by forming to the wavy shape.

4. 发明专利

JPH0760409A TWIN DRUM TYPE CONTINUOUS CASTING APPARATUS FOR AL OR AL ALLOY 失效
公开(公告)号：JPH0760409A
公开(公告)日：1995-03-07
申请号：JP20911893
申请日：1993-08-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： TANAKA KISABURO , YAMAMOTO KEIICHI , TERADO SADAMU , YAMANE TAKASHI , TAKATANI HIDEAKI
IPC分类号： B22D11/06
摘要： PURPOSE:To obtain a twin drum type continuous casting apparatus for Al or Al alloy, by which solidified floating crystal is not produced in a cast slab and the defect is hardly occurred. CONSTITUTION:In the twin drum type continuous casting apparatus for casting the cast slab 10 by pouring molten non-ferrous metal 12 containing the aluminum alloy into a space demarcated with one pair of water cooling rolls 11A, 11B arranged in parallel and rotated mutually in the reverse direction and a short side weirs in slidable contact with both end surfaces of the drums, a vibrating plate 17 which is vibrated by an electromagnet 19 whose tip part is dipped into the molten metal 12 in almost parallel to the roll surface and between a pouring nozzle 13 and the drum surface.

5. 发明专利

JPH079094A CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH079094A
公开(公告)日：1995-01-13
申请号：JP17755193
申请日：1993-06-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAKAJIMA HIROSHI , HIRATA KOICHI , YAMANE TAKASHI
IPC分类号： B22D11/06 , B22D11/10 , B22D11/115 , B22D11/128
摘要： PURPOSE:To provide a continuous casting apparatus, in which the internal crack in a cast slab continuously cast is reduced and the product having good quality is obtd. CONSTITUTION:Molten steel (liquid phase) 8 is poured into a mold 2 from a nozzle 1 and continuously cast as the cast slab 7. The upper part of the cast slab 7 is supplied with foot rolls 3 and rolling reduction is executed to the lower part with the rolling reduction rolls 4 and the cast slab is carried. One pair of linear type electromagnets composed of six pieces of iron cores 5 and coils 6 are arranged between the foot rolls 3 and the rolling reduction rolls 4. Electricity is conducted in the coils 6, and by penetrating AC magnetic field into the inner part of the cast slab 7 from the tip parts of the iron cores 5, while fluid-stirring the liquid phase 8 near solid-liquid coexisting zone 10 in the cast slab 7, the casting is executed. In this result, the solid-liquid coexisting zone 10 is remelted at some speed or higher and the thickness in the solid-liquid coexisting zone is thinned and the internal crack can be restrained to be short.

6. 发明专利

JPH06315742A METHOD FOR STARTING OPERATION OF TWIN ROLL TYPE THIN SHEET CONTINUOUS CASTER 失效
公开(公告)号：JPH06315742A
公开(公告)日：1994-11-15
申请号：JP12780493
申请日：1993-05-06
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： YAMAGAMI YASUHIRO , YAMADA MAMORU , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06 , B22D11/08
摘要： PURPOSE:To provide a starting method of a thin sheet continuous caster smoothly guiding a cast thin sheet by using a dummy sheet. CONSTITUTION:At first, the upper end side of the dummy sheet 7 is projected upward from a kissing part 8 of cooling rolls 1a, 1b, and at the same time of opening a stopper 5 in a tundish, the rotation of the cooling rolls is started. While the molten metal reaches to the surfaces of the cooling rolls through a molten metal supplying nozzle 3, rotating peripheral velocity at the initial stage is given to the cooling rolls. While casting in the upper end part of the dummy sheet 7 by the molten metal reached to a molten metal pool part, the casting is started. By this method, as the cast thin sheet is combined with the dummy sheet 7, even if the width of the bottommost piece becomes unevenness, the cast thin sheet can smoothly be started and carried with the dummy sheet.

7. 发明专利

JPH03204147A COOLING DRUM FOR STRIP CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH03204147A
公开(公告)日：1991-09-05
申请号：JP33871089
申请日：1989-12-28
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MATSUMURA SHOGO , KASAMA AKIO , NAKAYAMA MITSURU , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the development of crack in a continuously cast strip by forming plural fine recessed parts on peripheral surface of drums with the specific periodic variation in longitudinal and transverse directions at the time of producing the strip metal by continuously casting molten metal with twin drum type. CONSTITUTION:The molten steel 4 in a tundish 5 is poured into a pouring basin 3 formed with two cooling rolls 1a, 1b through a pouring nozzle 2 and drawn as the continuously cast strip 7 with pinch rolls 8 by rotating the rolls 1a, 1b. In this case, plural recessed parts nondirectionally arranged in longitudinal, transverse and slant directions having round or oval shaped opening part of 5 - 100 mum depth and 0.1 - 1.2 mm diameter on the peripheral surface of cooling drums 1a, 1b are provided. The distribution rate of the recesses is varied periodically related to longitudinal direction and transverse direction of drum alone or both simultaneously, and the cycle W of the periodic variation of the recesses is set to 5 mm

8. 发明专利

JPH0366455A COOLING DRUM FOR CONTINUOUS CASTING APPARATUS FOR CAST STRIP 失效
公开(公告)号：JPH0366455A
公开(公告)日：1991-03-22
申请号：JP20022689
申请日：1989-08-03
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： KAJIOKA HIROYUKI , NAKAJIMA HIROYUKI , TANAKA SHIGENORI , MIYAZAKI MASAFUMI , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To obtain austenite series stainless steel having excellent surface characteristic in a product by specifying size of dimple on the surface of cooling drum and interval of mutually adjacent dimples. CONSTITUTION:The diameter H is made 20 - 100mum and the depth is made 5 - 30mum for the dimple 4 on the surface 1 of cooling drum and the dimples are arranged so that the interval L of the adjacent dimples is >=1/5 of H and

9. 发明专利

JPH0366450A APPARATUS FOR CONTINUOUSLY CASTING CAST STRIP HAVING EXCELLENT SURFACE CHARACTERISTIC 失效
公开(公告)号：JPH0366450A
公开(公告)日：1991-03-22
申请号：JP20022189
申请日：1989-08-03
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： FURUYA TAKASHI , TAKEUCHI HIDEMARO , NAKAJIMA HIROYUKI , KASAMA AKIO , SASAKI KUNIMASA , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent surface crack and rough surface by setting parting plate till molten metal surface or lower without coming into contact with cooling drums over the whole cooling drum width between the cooling drums and a pouring nozzle in pouring basin part. CONSTITUTION:In a strip continuous casting apparatus, the molten metal is poured into the pouring basin part 9 constituted with one pair of rotated cooling drums 3, 4 and side weirs 7 from a tundish 1 through the pouring nozzle 2. The cast strip 10 cast onto the cooling drums 3, 4 is drawn out with rollers. Then, the parting plates 5, 6 are set in the pouring basin part 9. The parting plates 5, 6 are set till the molten metal surface or lower at the position in without contact with the cooling drums 3, 4 over the whole cooling drum 3, 4 width between the cooling drums 3, 4 and the pouring nozzle 2. By this method, involution of scale into gap between the cooling drums and variation of the molten metal surface can be prevented.

10. 发明专利

JPS63144845A PRODUCTION OF HOLLOW CASTING 失效
公开(公告)号：JPS63144845A
公开(公告)日：1988-06-17
申请号：JP29159586
申请日：1986-12-09
申请人： MITSUBISHI HEAVY IND LTD
发明人： KADOI JUN , YOKOTE HIROMI , YAMANE TAKASHI
IPC分类号： B22D7/04
摘要： PURPOSE:To improve the workability of a hollow casting and to reduce the cost thereof by preheating a metallic mold core having the coefft. of thermal expansion larger than the coefft. of thermal expansion of a casting material to a prescribed temp., casting a molten metal into the mold and allowing the mold core to shrink more largely than the casting, then removing the core. CONSTITUTION:The casting mold consisting of master mold 1 and the metallic mold core 2 is provided on a mold stool 4 and the melt of a ductile cast iron is cast from a sprue 3 into the mold. SUS304 having the coefft. of thermal expansion larger than the coefft. of thermal expansion of the molten metal material is used for the core 2 and the core 2 is preheated to the prescribed temp. satisfying the equation T1alpha1>T2alpha2, where alpha1, alpha2 are respectively the coeffts. of thermal expansion of the casting and the metallic mold core, and T1, T2 are respectively the average temps. of the casting and the metallic mold core when the solidification is completed. The mold is cooled down to an ordinary temp. after casting to allow the core 2 to shrink more largely than the casting, then the core is removed. The workability of the hollow casting is thereby improved and the cost is reduced.

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