专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

91. 发明专利

JPH09268331A APPARATUS FOR RECOGNITION ZINC OXIDE FROM IRON MAKING DUST 失效
公开(公告)号：JPH09268331A
公开(公告)日：1997-10-14
申请号：JP10461996
申请日：1996-04-01
申请人： NIPPON KOKAN KK
发明人： ISOZAKI SHINICHI , WATABE MASAYUKI , SATO NOBORU
IPC分类号： C01G9/02 , C21C5/40 , C21C5/56 , C22B7/02 , C22B19/30 , C22B19/34
摘要： PROBLEM TO BE SOLVED: To provide a recovering apparatus which continuously and efficiently recovers zinc oxide from iron making dust contg. low-concn. zinc. SOLUTION: This recovering apparatus consists of a reaction furnace 32 which is charged with agglomerated iron making dust 22, heats and reduces the agglomerated dust, recovers the iron-component thereof into molten iron 33, evaporates the reduced zinc and holds the molten iron 33 to be made into the zinc oxide and a recovering means for recovering the zinc oxide. In such a case, this reaction furnace 32 has a means for heating agglomerated dust 22 and molten iron 33 and a means for stirring the molten iron 33. Two or more heating burners installed in the upper part of the reaction furnace 32 are used as the means for heating the molten iron 33 and the means for stirring the molten iron.

92. 发明专利

JPH08283052A METHOD FOR BLOWING WASTE PLASTICS TO ROTARY KILN 失效
公开(公告)号：JPH08283052A
公开(公告)日：1996-10-29
申请号：JP11266495
申请日：1995-04-14
申请人： YOSHIZAWA SEKKAI KOGYO KK , NIPPON KOKAN KK
发明人： MATSUMURA SHUNSUKE , TANI MITSUO , AOYAMA EIJI , ITO HIROYASU , ISOZAKI SHINICHI , TATEFUKU TERUO , AOKI TAKEHIKO , SEKIGUCHI TAKESHI , WATABE MASAYUKI
IPC分类号： F23G5/20 , C04B2/10 , F23G7/12 , F27B7/34
摘要： PURPOSE: To obtain a method for using waste plastics as part of main fuel and blowing the waste plastics into a rotary kiln. CONSTITUTION: This method includes (a) a stage for forming waste plastic particles as fine flux flow and (b) a stage for blowing the fine flux flow of the waste plastic particles as fuel from the upper side 18 of a main fuel blowing position 14 into the rotary kiln and blowing the fine flux flow in such a manner that the oxygen concn. at the landing point of the unburned waste plastic particles in the rotary kiln is >=5vol.% and that the temp. thereof is >=1000 deg.C. The waste plastic particles to be blown are preferably polyethylene, polypropylene and polystyrene of a grain size of =2 kinds thereof.

93. 发明专利

JPH0682287A METHOD AND EQUIPMENT FOR MEASURING FLOW RATE OF HIGH-CONCENTRATION POWDER CARRIED BY CARRIAGE MEDIUM THROUGH PIPE 失效
公开(公告)号：JPH0682287A
公开(公告)日：1994-03-22
申请号：JP23379492
申请日：1992-09-01
申请人： NIPPON KOKAN KK
发明人： ISOZAKI SHINICHI , MATSUI SATOSHI
IPC分类号： G01F1/74
摘要： PURPOSE:To enable execution of on-line measurement by measuring the average concentration value of power from the transmittance of light transmitted through measuring tubes for light transmission which are disposed projecting into a pipe so that they are opposed to each other with a prescribed end gap between them. CONSTITUTION:Measuring tubes 11a and 11b for light transmission are inserted into openings 8a and 8b which are positioned on a line intersecting the axis C of a vertical pipe 1 at right angles and are opposed to each other, and are prodrusively disposed so that they are opposed to each other with a prescribed end gap L between them. Light is transmitted from the tube 11a on one side to the tube 11b on the other side, attenuation of the quantity of the transmitted light is determined in comparison with the original intensity of the projected light, and an average concentration value of powder in the vertical pipe 1 is calculated therefrom. Meanwhile, an average flow velocity value of a medium is calculated from an output signal from a flow velocity detecting end by an arithmetic part. An arithmetic device converts the measured values from the light quantity detecting end and the flow velocity detecting end into signals, computes them by means of the arithmetic part and makes a display part display the flow rate of the power 7.

94. 发明专利

JPH04297515A PRE-REDUCTION FURNACE IN SMELTING REDUCTION EQUIPMENT FOR IRON ORE 失效
公开(公告)号：JPH04297515A
公开(公告)日：1992-10-21
申请号：JP8469091
申请日：1991-03-25
申请人： NIPPON KOKAN KK
发明人： ARIYAMA TATSURO , WATABE MASAYUKI , ARAKAWA SAKAE , MATSUO MASAHIRO , ISOZAKI SHINICHI
IPC分类号： C21B11/00 , C21B13/00
摘要： PURPOSE:To prevent the stickiness of dust to a dispersion plate by allowing the upper face of the dispersion plate body having cooling body flowing passage to be an inner part refractory layer and arranging a metallic plate at a lower face through a heat insulating material. CONSTITUTION:The dispersion plate 8 partitioning the inside part of a furnace body 5 is constituted of a rigid metallic thick plate 11 forming the flowing passage 14 for cooling fluid in the inside part, the refractory layer 12 provided on the upper part of the thick plate 11 and the metallic plate 31 provided on the lower face of the thin plate 11 through the heat insulating material layer 32. Plural nozzle holes 13 are penetrated into the dispersion plate 8 in a vertical direction, and the nozzle hole parts 130 of the refractory layer 12 in respective nozzle holes 13 are enlarged to the diameter upward. If necessary, at the lower part of the dispersion plate 8, at least two pieces of gas injection tubes are provided so as to be movable in a horizontal direction. By this method, while suppressing the temp. drop of reducing gas, the stickiness of dust on the lower face of the dispersion plate 8 or in the nozzle hole 13 can effectively be prevented and the blowing of the reducing gas into fluidized bed can stably be executed.

95. 发明专利

JPH04191311A PRE-REDUCTION FURNACE IN SMELTING REDUCTION DEVICE FOR IRON ORE 失效
公开(公告)号：JPH04191311A
公开(公告)日：1992-07-09
申请号：JP32157090
申请日：1990-11-26
申请人： NIPPON KOKAN KK
发明人： MASE JIRO , ARIYAMA TATSURO , TSUBOI HARUTO , ISOZAKI SHINICHI , KITANO YOSHIYUKI , ARAKAWA SAKAE
IPC分类号： C21B11/02 , C21B13/02
摘要： PURPOSE:To effectively prevent the sticking and the growth of dust to a dispersing plate by parallel and closely arranging fixed bars and movable bars to the dispersing plate forming fluidized bed and positioning projection parts at the other part of side part in notching parts at the one end of side part. CONSTITUTION:The pre-reduction furnace body 5 is partitioned with the dispersing plate 6 and reducing gas introduced into a gas injecting chamber 8 is guided to a pre-reduction chamber 7 at the upper part through the dispersing plate 6 to form the fluidized bed and the pre-reduction for iron ore is executed. In the above-mentioned fluidized bed type pre-reduction furnace in the smelting reduction device for iron ore, the above-mentioned dispersing plate 6 is constituted of the bar group alternately arranging the fixed bars 9a and the movable bars 9b as parallel and close. The above- mentioned fixed bar 9a is fixed to a supporting part 13 and the movable bar 9b is advanced/retreated in a longitudinal direction with a driving device 12. Further, in the adjoining bars, the notching part 10 is formed at the side part of the one part of bar, and the projecting part 11 positioned in this notching part 10 at the side part of the other part of bar is disposed and these are relatively moved according to advancing/retreating of the movable bar 9b. By this method, the sticking and the growth of dust to the dispersing plate 6 can be prevented.

96. 发明专利

JPH04191309A PRE-REDUCTION FURNACE IN SMELTING REDUCTION DEVICE FOR IRON ORE 失效
公开(公告)号：JPH04191309A
公开(公告)日：1992-07-09
申请号：JP32156890
申请日：1990-11-26
申请人： NIPPON KOKAN KK
发明人： MASE JIRO , ARIYAMA TATSURO , TSUBOI HARUTO , ISOZAKI SHINICHI , KITANO YOSHIYUKI , ARAKAWA SAKAE
IPC分类号： C21B11/02 , C21B13/02
摘要： PURPOSE:To efficiently prevent the sticking and the growth of dust to a dispersing plate by injecting high pressure gas toward the lower face of the dispersing plate from plural gas supplying holes opened at plural recessed parts in a blasting device disposed at a bottom part in a pre-reduction furnace. CONSTITUTION:In a fluidized bed type pre-reduction furnace segmented with a pre- reduction chamber 12 and a gas injecting chamber 13 with the dispersing plate 5 penetrating plural nozzle holes 6, the blasting device is disposed at the bottom part of the furnace. The blasting device is constituted by disposing plural recessed parts 8 at the upper face of the bottom plate 7 in the furnace and opening the gas supplying holes 9 disposed at the inside of the bottom plate 7 at the bottom part of the above- mentioned each recessed part 8 so as to supply the gas into the gas supplying hole 9 from the outside of the furnace through the gas supplying pipe 10. During operating the furnace, the high pressure gas introduced from the above-mentioned gas supplying pipe 10 is periodically supplied into the gas supplying hole 9 and injected toward the lower face of dispersing plate 5 together with particles stored in the recessed part 8. By this method, the dust stuck to the lower face of dispersing plate 5 and the vicinity of the inlet of the nozzle hole 6 is removed.

97. 发明专利

JPH04191308A PRE-REDUCTION FURNACE IN SMELTING REDUCTION DEVICE FOR IRON ORE 失效
公开(公告)号：JPH04191308A
公开(公告)日：1992-07-09
申请号：JP32156790
申请日：1990-11-26
申请人： NIPPON KOKAN KK
发明人： MASE JIRO , ARIYAMA TATSURO , TSUBOI HARUTO , ISOZAKI SHINICHI , KITANO YOSHIYUKI , ARAKAWA SAKAE
IPC分类号： C21B11/02 , C21B13/02
摘要： PURPOSE:To effectively prevent sticking and growth of dust to the inside of a nozzle hole by connecting a metal cylinder constituting a nozzle hole embedded in a dispersing plate main body for forming a fluidized bed with a water cooling pipe and executing cooling while making the gas flow in a wall. CONSTITUTION:In a pre-reduction furnace in a smelting reduction device for iron ore, the exhaust gas from a smelting reduction furnace introduced into a gas injecting chamber 15 at lower part segmented into an upper part and a lower part with the dispersing plate 5 is introduced into the pre-reduction chamber 14 at upper part through the nozzle hole 7, and the fluidized bed is formed on the dispersing plate 5 to execute the pre-reduction to the iron ore. The above-mentioned nozzle hole 7 is constituted of the closed double pipe structural metal cylinder 8 embedded in the refractory-made dispersing plate body 6. In the dispersing plate body 6, further, a gas supplying pipe 9 and the metal-made water cooling pipe 10 are set. The cooling gas of N2, etc., is supplied in the double pipe structural inner part from this gas supplying pipe 9 through a branching pipe 11. Further, the water cooling pipe 10 and the metal cylinder 8 are connected through connecting members 12. By this method, the metal cylinder 8 is cooled and the sticking and the growth of dust are prevented so as not to clog the nozzle hole 7.

98. 发明专利

JPH04116116A PREREDUCING FURNACE FOR IRON ORE SMELTING REDUCTION EQUIPMENT 失效
公开(公告)号：JPH04116116A
公开(公告)日：1992-04-16
申请号：JP23626190
申请日：1990-09-06
申请人： NIPPON KOKAN KK
发明人： MASE JIRO , ARIYAMA TATSURO , TSUBOI HARUTO , ISOZAKI SHINICHI , KITANO YOSHIYUKI , ARAKAWA SAKAE
IPC分类号： C21B11/02 , C21B13/00
摘要： PURPOSE:To effectively prevent the deposition and growth of dust in a nozzle hole by forming the nozzle hole in the diffuser plate of the fluidized-bed prereducing furnace with the suspended cylinders with the gas inlet directed toward the part except a gas introducing port. CONSTITUTION:A waste gas from a smelting and reducing furnace (not shown in the figure) is introduced from the gas introducing port 11 of a prereducing furnace main body A and injected into a prereducing chamber 8 from a gas blowing chamber 10 through the nozzle hole 6 of a diffuser plate 5 to form a fluidized bed. The iron ore is prereduced in the bed, then supplied to the smelting reduction furnace and further smelting-reduced. In this prereducing furnace, the hole 6 is formed with cylinders 7 with the upper part embedded in the diffuser plate main body 8 and the lower end closed. A gas inlet 72 directed toward the part except the position of the gas introducing port 11 is formed in the side part of the cylinder 7 below the plate 5. Consequently, the inflow of dust in the waste gas to the hole 6 is prevented, and the deposition of dust on the inner surface is effectively obviated.

99. 发明专利

JPH04116112A PREREDUCING FURNACE FOR IRON ORE SMELTING REDUCTION EQUIPMENT 失效
公开(公告)号：JPH04116112A
公开(公告)日：1992-04-16
申请号：JP23626290
申请日：1990-09-06
申请人： NIPPON KOKAN KK
发明人： MASE JIRO , ARIYAMA TATSURO , TSUBOI HARUTO , ISOZAKI SHINICHI , KITANO YOSHIYUKI , ARAKAWA SAKAE
IPC分类号： C21B11/00 , F27B15/10
摘要： PURPOSE:To clean diffuser pipes one by one by appropriately closing a shutoff valve and without shutdown by providing plural waste gas diffuser pipes furnished with a shutoff valve at the bottom of a furnace. CONSTITUTION:Plural diffuser pipes 6 are horizontally arranged in parallel at the bottom of a prereducing furnace main body 5. Diffuser holes 7 are provided to each diffuser pipe 6 at appropriate intercals. One end of the pipe 6 is connected to a header 8 outside the furnace, and a shutoff valve 9 is furnished on one end side of the pipe 6 positioned outside the furnace. The waste gas from a smelting and reducing furnace is supplied to each pipe 6 from the header 8 and blown off into the furnace 5 from the holes 7 to form the fluidized bed 11 of ore. When dust deposits in the pipe 7 to some extent, the shutoff valve 9 of any pipe 7 is closed, and the supply of waste gas to the pipe 7 is stopped. A lid 10 is opened, and the inside of the pipe 7 is cleaned. Consequently, waste gas is stably blown into the fluidized bed 11.

100. 发明专利

JPH04110409A SMELTING-REDUCTION METHOD AND EQUIPMENT FOR IRON ORE 失效
公开(公告)号：JPH04110409A
公开(公告)日：1992-04-10
申请号：JP23016090
申请日：1990-08-31
申请人： NIPPON KOKAN KK
发明人： KAWADA HITOSHI , ARIYAMA TATSURO , ISOZAKI SHINICHI
IPC分类号： C21B11/02 , C21B13/00
摘要： PURPOSE:To effectively remove dust in exhaust gas with a simple equipment by passing the exhaust gas discharged from a smelting reduction furnace and supplied into a pre-reduction furnace through moving layer of pre-reduced ore on the way of supplying this. CONSTITUTION:A part of the preheated and pre-reduced ore in the pre-reduction furnace 2 is allowed to flow in a moving layer forming chamber 11 to form the moving layer 13 of ore. On the other hand, the exhaust gas supplied into the pre-reduction furnace 2 passes the above moving layer 13 through a primary dust removing machine 10. At this time, the fine particle dust contained in the exhaust gas is stuck and adsorbed to the ore in the moving layer 13. The cleaned exhaust gas with this is guided into the pre-reduction furnace 2 with scarcely developing lowering of the temp. On the other hand, the other part in the pre-reduction furnace 2 is joined together with the ore from the moving layer forming chamber 11 in the ore supplying tank 8 and supplied into the smelting reduction furnace 1. By this method, the dust in the exhaust gas guided in the pre-reduction furnace 2 is effectively removed with the simple equipment without lowering the temp. and stickiness of the dust in the pre-reduction furnace 2 is effectively prevented.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式