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1. 发明专利

JPH06145731A METHOD FOR CHARGING RAW MATERIAL TO BLAST FURNACE AND DEVICE THEREFOR 失效
公开(公告)号：JPH06145731A
公开(公告)日：1994-05-27
申请号：JP31793892
申请日：1992-11-04
申请人： KAWASAKI STEEL CO
发明人： OGAMI MASAMICHI , SENOO YOSHIKAZU
IPC分类号： C21B5/00 , C21B7/20
摘要： PURPOSE:To uniformalize the raw material deposition state in the circumferential direction within a blast furnace by providing the plural positions in the circumferential direction of the furnace top part with raw material raking up means and pushing out the deposited raw materials on the furnace wall side toward the center of the furnace. CONSTITUTION:The raw material raking up means 21, 22 are disposed in the respective plural positions in the circumferential direction of the furnace top part in the blast furnace 1. The deposited raw materials on the furnace wall side are pushed out toward the center of the furnace 1 by controlling the push out of the respective raw material raking up means 21, 22 to rake up the flat parts of the raw materials formed in the furnace wall parts, by which the raw material deposition state in the circumferential direction and particularly the raw material deposition state in the furnace wall parts are uniformalized. As a result, the specified air permeability in the furnace 1 is assured and the normality of the furnace condition is maintained without generating abnormality in the gas flow direction in the furnace 1.

2. 发明专利

JPH062020A METHOD FOR BLOWING POWDERY FUEL INTO BLAST FURNACE 失效
公开(公告)号：JPH062020A
公开(公告)日：1994-01-11
申请号：JP15634892
申请日：1992-06-16
申请人： KAWASAKI STEEL CO
发明人： KOKUBU HARUO , SENOO YOSHIKAZU
IPC分类号： C21B5/00 , C21B7/00
摘要： PURPOSE:To improve combustibility with a small quantity of enriching oxygen and to enable blowing of a large quantity of powdery fuel without needing a water cooling lance by using a single-pipe lance or a double-pipe lance for blowing the powdery fuel inserted into a blasting tuyere penetrating a blow-pipe in a blast furnace. CONSTITUTION:The average concn. of the oxygen in the total gas introduced into the single-pipe lance or double-pipe lance is adjusted to 35-65% by using oxygen having

3. 发明专利

JPH02250912A METHOD AND APPARATUS FOR CONTINUOUSLY DESULFURIZING MOLTEN IRON 失效
公开(公告)号：JPH02250912A
公开(公告)日：1990-10-08
申请号：JP7133589
申请日：1989-03-23
申请人： KAWASAKI STEEL CO
发明人： SENOO YOSHIKAZU , KOKUBU HARUO
IPC分类号： C21C1/00 , C21C1/02
摘要： PURPOSE:To effectively execute desulfurization in the molten iron at low cost by adding desulfurizing agent into the exposed molten iron passing through a molten iron trough at downstream side of a skimmer, rapidly causing to flow down into a reaction vessel, stirring and reacting the accompanied desulfurizing agent and the floating molten desulfurizing agent. CONSTITUTION:The molten iron 2 tapped from a blast furnace is introduced into the skimmer 6 and slag 4 floated with a skimmer damper 8 is separated into a slag trough 10. The molten iron 2 passing through the lower end of the damper 8 is guided to the molten metal trough 14 narrowly contracting flowing passage width W2 arranged on a weir, and the desulfurizing agent is added with a desulfurizing agent adding by device 20 and rapidly caused to flow down along an inclined wall 16 and dipped into bottom part of molten metal pool in the reaction vessel 18 and the accompanied desulfurizing agent and the floating molten desulfurizing agent 22A are stirred and reacted. Then, the inclined angle of the inclined wall 16 is made to 45 to 85 deg., and the width W2 of the molten iron trough 14 is made to 5 to 50% of the width W1 in the reaction vessel 8. By this method, without necessitating to use a wide space, the desulfurization of the molten iron 2 is effectively executed at a low cost.

4. 发明专利

JPH05195032A METHOD FOR CONTINUOUSLY DESULFURIZING MOLTEN IRON ON CASTING FLOOR IN BLAST FURNACE 失效
公开(公告)号：JPH05195032A
公开(公告)日：1993-08-03
申请号：JP2596192
申请日：1992-01-17
申请人： KAWASAKI STEEL CO
发明人： KOKUBU HARUO , SENOO YOSHIKAZU , OGAMI MASAMICHI , FUJII TETSUYA , NAKATO SAN
IPC分类号： C21B5/02 , C21C1/02
摘要： PURPOSE:To enable the recycling use of the whole desulfurized slag by specifying all of dipping depth of a blowing lance into molten iron, gas velocity of the lance tip part and flux at the time of desulfurizing the molten iron, in a molten iron trough on a casting floor in a blast furnace. CONSTITUTION:A desulfurizing reaction vessel is arranged in the molten iron trough on the casting floor in the blast furnace and flux from the blowing lance is injected into the molten iron with carrier gas to execute the desulfurization in the molten iron. Then the dipping depth of the blowing lance into the molten iron is made to be 700-1000mm and the gas velocity at the tip part of the lance is made to be >=60m/sec and, as the flux, burnt lime powder or the mixed flux of the burnt lime powder with lime stone powder is used. By this method, at the time of using the flux, which does not contain fluorite, the desulfurizing efficiency of the same grade is obtd. as the flux containing the fluorite and the whole desulfurized slag can be used in the recycle.

5. 发明专利

JPH0328308A REACTION VESSEL FOR TREATING MOLTEN IRON IN CASTING FLOOR FOR BLAST FURNACE 失效
公开(公告)号：JPH0328308A
公开(公告)日：1991-02-06
申请号：JP16261389
申请日：1989-06-27
申请人： KAWASAKI STEEL CO
发明人： KOKUBU HARUO , SENOO YOSHIKAZU , NAKATO SAN , NOZAKI TSUTOMU
IPC分类号： C21C1/00
摘要： PURPOSE:To promote reaction of molten iron and flux and to execute pre-refining of desiliconization, dephosphorization, desulfurization, etc., to the molten iron with good efficiency by injecting the flux for pre-refining into the molten iron while the molten iron tapped from a blast furnace is caused to flow in a molten iron treating vessel having a specific construction through a molten iron trough. CONSTITUTION:Molten blast furnace slag is removed with a skimmer while passing the molten iron 12 tapped from the blast furnace through the molten iron through 11. The molten iron free from the molten slag is caused to flow down in an inclined guide trough 3 and on the way of this, the flux 6 for pre-refining of desiliconizing agent, dephsophorizing agent, desulfurizing agent, etc., is forcedly injected into the molten iron stream 4 flowing down in the guide trough 3 with an adding device 5 by blasting to execute the pre-refining of desiliconization, dephosphorization, desulfurization, etc., to the molten iron in the reaction vessel 1. In this case, by specifying the relation between the construction of the reaction vessel for pre-refining of the molten iron and the flow-down molten iron quantity to the relation shown with the inequality I, the pre-refining of the molten iron is efficiently executed.

6. 发明专利

JPS57169653A DETECTION OF STOWAGE CONDITIONS AT CROSS SECTION OF RAW MATERIAL BED 失效
公开(公告)号：JPS57169653A
公开(公告)日：1982-10-19
申请号：JP5451681
申请日：1981-04-10
申请人： KAWASAKI STEEL CO
发明人： SENOO YOSHIKAZU
IPC分类号： G01N1/04 , G01N1/20
摘要： PURPOSE:To detect the stowage conditions at the cross section of a raw material bed accurately by disposing two sheets of side plates larger than the cross section of the raw material bed beforehand in the raw material bed in such a way that these plates intersect orthogonally with the stowage direction of ores. CONSTITUTION:Many kinds of ores 1 are transferred to a blending yard by a belt conveyor line 2, and are stowed uniformly in a raw material bed 5 by a boom conveyor 4 of a self-traveling type bed stacker 3, whereby they are blended. An ore-containing frame body 10 is beforehand erected in this bed 5 by means of auxiliary fittings 16 in such a way that two sheets of its side plates 11 intersect orthogonally with the stowage direction of the ore. After the end of the stowing, the body 10 is removed from the bed 5, and one of the side plates 11 is removed to expose substantially the same stowage stage as that of the cross section of the bed 5. It is possible to approach the raw materials to a uniformly mixed state through improvement of stowing methods or the like by detecting the stowage conditions at the cross section of the bed 5 in this way.

7. 发明专利

JPS5644704A METHOD OF DECREASING LOAD OF LANCE OF GAS SAMPLING DEVICE 失效
公开(公告)号：JPS5644704A
公开(公告)日：1981-04-24
申请号：JP11881579
申请日：1979-09-18
申请人： ISHIKAWAJIMA HARIMA HEAVY IND , KAWASAKI STEEL CO
发明人： KAWAMOTO MASAYUKI , NASU TOSHIYUKI , YASUSAKA TOSHIO , TANAKA SHIYUU , SENOO YOSHIKAZU
IPC分类号： C21B7/24 , G01N1/22
摘要： PURPOSE:To decrease the in-furnace raw materials in the upper part of a lance and decrease the load acting upon the lance by giving forward and backward motion to the lance at the time of inserting the gas sampling lance into the blast furnace. CONSTITUTION:The gas sampling and temperature measuring lance 4 in a blast furnace 2 is inserted into the blast furnace 1 by a lance moving differential type reciprocating cylinder 6 operated hydraulically. The lance 4 repeats forward and backward movements at fixed time intervals on account of the action of an electromagnetic change-over valve 8 and a timer 10. These movements of the lance cause the raw materials 15 of the parts in contact with the upper part of the lance 4 to be collapsed, then part thereof slip into the voids 16 made on the lower side of the lance 4 and the load transmission from the upper part of the lance 4 becomes imperfect, thereby decreasing the load of the lance 4. Hence, even if the lance 4 itself is made small, it does not break and the entire part of the device such as lance moving cylinder can be miniaturized.

8. 发明专利

JPH06100912A LANCE FOR BLOWING POWDERY FUEL FOR BLAST FURNACE 失效
公开(公告)号：JPH06100912A
公开(公告)日：1994-04-12
申请号：JP27784992
申请日：1992-09-22
申请人： KAWASAKI STEEL CO
发明人： MATSUI TAKASHI , KOKUBU HARUO , SENOO YOSHIKAZU
IPC分类号： C21B7/00
摘要： PURPOSE:To prevent the erosion of the tip part of a lance and to improve the combustion ratio of fine coal by suitably positioning the tip part of an inner pipe to the inner side from the tip part of an outer pipe in a double pipe lance for blowing fuel into a blow pipe for blowing hot blast. CONSTITUTION:This powdery fuel blowing lance composed of the double pipe lance is arranged penetrating the wall of the blow pipe for blowing the hot blasting connected with a tuyere in a blast furnace. The fine coal gas-carried from the inner pipe 8 in this double pipe lance is injected with oxygen or oxygen-enriched air from the outer pipe 9. Then the tip part of the inner pipe 8 is drawn into the inner side from the tip part of the outer pipe 9 by 15-105mm. By this method, the mixing of the fine coal with the oxygen is promoted and the combustion rate is improved, and also, the erosion of the tip part of the lance can be prevented.

9. 发明专利

JPS56163206A OPERATING METHOD FOR BLAST FURNACE 失效
公开(公告)号：JPS56163206A
公开(公告)日：1981-12-15
申请号：JP6692380
申请日：1980-05-20
申请人： KAWASAKI STEEL CO , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： TANAKA SHIYUU , SENOO YOSHIKAZU
IPC分类号： C21B5/00 , C21B7/24
摘要： PURPOSE:To control the distributions of the gas flow in a blast furnace and stabilize furnace conditions by operating the blast furnace in such a manner that the temp. differences of the gas in the furnace detected with the temp. detecting means provided in the upper and lower two stages in the upper part of the heat retaining zone of the furnace are within a correct range. CONSTITUTION:Temp. detecting means such as, for example, sondes, are provided by being divided into two stages, upper and lower, in the upper part of the heat retaining zone of a blast furnace, by which the infurnace temps., particularly the elevating infurnace temps. are measured. In this case, the respective sondes are usually directed from the outside of the blast furnace into its radial direction, and the infurnace gas temps. particularly within the range of about 1/6 the inside diameter of the blast furnace from the wall of the blast furnace are detected. The infurnace gas temp. are then measured with the upper end lower sondes, and the blast furnace is operated by adjusting, for example, the charging conditions from the furnace top and the blast conditions from tuyeres to maintain these temperature differences so as to reduce the component fluctuations in the molten iron. As a result, the heat flow ratio in the blast furnace is evaluated with good accuracy and the stable operation is maintained.

10. 发明专利

JPS5626240A LANCE EMERGENCY EVACUATING METHOD FOR GAS SAMPLING DEVICE 失效
公开(公告)号：JPS5626240A
公开(公告)日：1981-03-13
申请号：JP10197379
申请日：1979-08-10
申请人： ISHIKAWAJIMA HARIMA HEAVY IND , KAWASAKI STEEL CO
发明人： KAWAMOTO MASAYUKI , NASU TOSHIYUKI , YASUSAKA TOSHIO , TANAKA SHIYUU , SENOO YOSHIKAZU
IPC分类号： G01N1/22
摘要： PURPOSE:To ensure a steady sampling for the gas sampling device by evacuating the lance by the lance driving device and according to the signal showing that the difference between the flow-in and flow-out temperature of the refrigerant which is supplied to cool the lance in the blast furnace has exceeded the value set previously. CONSTITUTION:When the temperature within furnace 2 increases to increase the temperature of lance 1, the cooling water in lance 1 is heated and then sent to discharge pipe 5. And the temperature of the discharged water is detected by temperature detector 7. The difference between the temperature of the discharged water and the temperature of the inflow water detected by temperature detector 6 provided to the cooling water supply pipe is compared with the set value through controller 8. And when the difference of temperature exceeds the set value, hydraulic cylinder 3a is started by the output of controller 8 and via electromagnetic switching valve 3 to evacuate lance 1. No evacuating action is caused with increase of the temperature in a short time. As a result, a steady sampling is ensured for the gas sampling device.

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