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1. 发明专利

JPH05132709A METHOD FOR DESULFURIZING MOLTEN IRON AND ITS MOLTEN IRON SAMPLER 失效
公开(公告)号：JPH05132709A
公开(公告)日：1993-05-28
申请号：JP11374492
申请日：1992-05-06
申请人： NIPPON KOKAN KK
发明人： ITO HARUO , HATTORI MICHINORI , NAKAJIMA RYUICHI , OKOCHI ITSUKI
IPC分类号： C21C1/02 , F27D3/18 , F27D21/00
摘要： PURPOSE:To effectively desulfurize molten iron by utilizing the kinetic energy of the molten iron flowing into a ladle from a blast furnace for the agitation of the molten iron. CONSTITUTION:The molten iron 6 is injected into a ladle 8 and sufficiently agitated, a desulfurizing agent is blown into the molten iron 6 from a blowing lance 9 into the agitated molten iron, and the molten iron is effectively desulfurized. The molten iron is sampled when desulfurized. Consequently, the cost of the steelmaking process is reduced, and the trucking time of the molten iron truck is decreased.

2. 发明专利

JPH04268006A METHOD FOR CONTROLLING FURNACE HEAT IN BLAST FURNACE 失效
公开(公告)号：JPH04268006A
公开(公告)日：1992-09-24
申请号：JP2898991
申请日：1991-02-25
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HATTORI MICHINORI , HOTTA HIROHISA
IPC分类号： C21B5/00
摘要： PURPOSE:To recover furnace heat in a cooled blast furnace in early time. CONSTITUTION:When molten iron temp. goes to the lower limit temp. or lower, a furnace core sonde 1 is inserted into the furnace core 4 through a blowing pipe 2 and a tuyere 3, and gaseous oxygen is blown into the furnace core 4 through the furnace core sonde 1. The furnace core 4 is activated and the molten iron temp. is raised. When the molten iron temp. exceeds the aimed temp. and exceeds the upper limit temp., gaseous nitrogen is blown into the furnace core 4 through the furnace core sonde 1 to control over-heat condition of the furnace core 4, and the molten iron temp. is controlled to the aimed temp. range. Recovering time of the furnace heat can do in short time, and the increase of fuel ratio during this term is extremely little.

3. 发明专利

JPH04259338A PRODUCTION OF SINTERED ORE 失效
公开(公告)号：JPH04259338A
公开(公告)日：1992-09-14
申请号：JP2112691
申请日：1991-02-14
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HATTORI MICHINORI , FUKUYO HIROSHI , HANABUSA MINORU
IPC分类号： C22B1/20 , C22B1/16
摘要： PURPOSE:To eliminate the nonuniformity or air diffusibility arising in the machine longitudinal direction of a sintering raw material layer by an avalanche phenomenon. CONSTITUTION:Bar materials 12 which form the comb teeth of a comb-tooth body 11 are inserted into the layer (downflow layer 9 or stagnating layer 10) flowing down on the slope 8 of the sintering raw material layer, and the sintering raw materials are charged while the above-mentioned bar materials 12 are kept vibrated by an exciter 13 provided on the comb-tooth body 11. Vibrations are transmitted to the stagnating part of the stagnating layer 10 when the bar materials 12 are charged into the flowing down layer. The stagnating parts, then, collapse down in a small stage and the generation frequencies of the avalanches increase. The amt. of the raw materials collapsing down per time of the avalanches decreases. The air diffusibility in the machine longitudinal direction of the sintering raw material layer is uniformized and the consumption unit of returns decreases (the yield improves).

4. 发明专利

JPH03240926A METHOD FOR ESTIMATING DISTRIBUTION OF CARBON CONCENTRATION IN HEIGHT DIRECTION OF SINTERED LAYER 失效
公开(公告)号：JPH03240926A
公开(公告)日：1991-10-28
申请号：JP3570690
申请日：1990-02-16
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , KUROSAWA SHINICHI , MATSUNAGA YOSHIFUMI , FUKUYO HIROSHI , WADA TAKASHI
IPC分类号： C22B1/20
摘要： PURPOSE:To exactly detect the distribution of the carbon concn. in the height direction of a sintered layer in a short period of time by inputting the respective measurement signals of the carbon concn. measuring instruments, gas flow meters and gas thermometers mounted to respective window boxes to a computing machine and making prescribed computations. CONSTITUTION:The measurement signals of the respective flow meters mounted to the respective window boxes(WB) of a DL type sintering machine are sent to a computing section 22 for the distribution of the gas flow rate in the longitudinal direction of the computing machine 20. The measurement signals necessary for determining the position and thickness of the rod hot layer in the longitudinal direction of the machine of the respective gas thermometers, etc., are sent to a computing section 21 for the position and thickness of the red hot layer in the longitudinal direction of the machine. The measurement signals of the respective CO and CO2 concn. measuring instruments and the results (signals) of the computations of a computing section 22 are sent to a computing section 23 which computes the distribution of the carbon concn. in the respective positions in the longitudinal direction of the machine by prescribed equation. The results (signals) of computation of the section 23 are sent together with the results of computation of the section 21 to a computing section 24 where the carbon concn. in the height direction of the sintered layer is computed by prescribed equation. The results of the computation are displayed on a CRT display 25. The distribution of the carbon concn. in the height direction of the sintered layer is controlled in real time in this way.

5. 发明专利

JPH03220292A METHOD FOR REMOVING SLUDGE FROM TAR 失效
公开(公告)号：JPH03220292A
公开(公告)日：1991-09-27
申请号：JP1354790
申请日：1990-01-25
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HASEBE SHINJI , OHASHI SHIGERU , ISHIGURO HIROKI
IPC分类号： B01D21/26 , C10C1/00
摘要： PURPOSE:To efficiently remove fine sludge and to reduce the moisture content of product tar by gathering a part of purified tar discharged from a centrifugal separator, mixing the remainder with crude tar, and centrifuging the mixture. CONSTITUTION:Gas liquor is separated from a mixture of tar and gas liquor which are obtained by cooling the gas generated from a coke oven, giving crude tar. The crude tar is heated to 60-150 deg.C and centrifuged in a centrifugal separator. A part of the tar obtained is gathered as purified tar while the remainder is mixed with crude tar, and the mixture is centrifuged.

6. 发明专利

JPH03215612A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH03215612A
公开(公告)日：1991-09-20
申请号：JP1088290
申请日：1990-01-19
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , HOTTA HIROHISA
IPC分类号： C21B5/00
摘要： PURPOSE:To blow pulverized coal and flux into a furnace in uniformly mixing condition by laying the flux at the specific ratio on unpulverizing coal on a conveyor and pulverizing after charging and mixing them into a mixer at the time of producing mixed material of the pulverized coal and flux for blowing from a tuyere in the blast furnace. CONSTITUTION:In the case of reducing Si content in molten iron tapping from the blast furnace by blowing the mixed material of the pulverized coal and flux powder from the tuyere in the blast furnace, the unpulverizing coal 2 is laid on the belt conveyor 3, and the flux 4 is laid thereon at the quantity so as to become 2-10wt.% of the total quantity of coal 2 and flux 4 and mixed in the mixer 1, and after stirring they are pulverized. The mixing ratio of both in the pulverized mixture is prevented a variance and the mixture become the mixed fine powder having uniform composition, and by blowing them into the blast furnace from the tuyere, the Si content in the molten iron in the furnace is effectively reduced.

7. 发明专利

JPH03215611A OPERATION OF BLAST FURNACE 失效
公开(公告)号：JPH03215611A
公开(公告)日：1991-09-20
申请号：JP1088190
申请日：1990-01-19
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , HOTTA HIROHISA
IPC分类号： C21B5/00
摘要： PURPOSE:To effectively reduce Si in molten iron by supplying pulverized coal and flux into a tuyere from outlet of a storing vessel in alternately laminating condition in the same storing vessel at the specific ratio at the time of reducing the Si content in the molten iron by blowing the mixed power of the pulverized coal and the flux from the tuyere in the blast furnace. CONSTITUTION:At the time of reducing the Si content in the molten iron in the furnace by blowing the pulverized coal and flux powder from the tuyere in the blast furnace, the fixed quantity Q of pulverized coal 2 is supplied into the storing vessel 1 during the fixed time T1, and after stoppage time T2, again the pulverized coal 2 is supplied. The fixed quantity of flux powder 3 is supplied in the storing vessel 1 as the showed pattern 2 during the above mentioned pulverized coal supply stoppage time T2, and the pulverized coal layer and the flux layer are alternately laminated. In this case, the quantity per one layer for each pulverized coal and flux, is made to =100. By discharging the pulverized coal and the flux from the outlet 4 in the storing vessel 1 under this condition, both raw materials are uniformly mixed and blown in the furnace, and Si content in the molten iron in the furnace is effectively reduced.

8. 发明专利

JPH03213131A METHOD FOR UNIFORMLY MIXING COALS FOR PULVERIZED COAL 失效
公开(公告)号：JPH03213131A
公开(公告)日：1991-09-18
申请号：JP905090
申请日：1990-01-18
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , IINO BUNGO , ITO HARUO , FURUYA SHIGEKI
IPC分类号： B01F3/18
摘要： PURPOSE:To stably mix coals by delivering different coal components in a predetermined mixing ratio by a quantitative delivery apparatus and stacking the same on the previously delivered coal on a conveyor scale to mix the coals by a mixer to ground the same by a grinder: CONSTITUTION:A follow transport apparatus 4 equipped with the quantitative delivery apparatus 4a connectable to a follow coal storage tank 2 storing coal whose components are different from those of the coal in a main coal storage tank 1 is allowed to make connection with a main feed apparatus 3 equipped with the conveyor scale 3a connectable to the main coal storage tank 1. A coal mixer 5 and a feed apparatus 6 reaching a coal grinder from the mixer 5 are arranged to one end of the apparatus 3. Coal is charged in the apparatus 3 in an indicated mixing ratio from the tank 1 and other coal is charged in the apparatus 4 in an indicated mixing ratio from the tank 2 to be stacked on the previously charged coal from the connection part to the apparatus 3 and both coals are charged in the mixer 5 from one end of the apparatus 3 to be mixed each other while the coal mixture is charged in the coal grinder by the apparatus 6 to be ground.

9. 发明专利

JPH03211242A IGNITION FURNACE OF SINTERING MACHINE 失效
公开(公告)号：JPH03211242A
公开(公告)日：1991-09-17
申请号：JP768290
申请日：1990-01-17
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , FUKUYO HIROSHI , WADA TAKASHI
IPC分类号： C22B1/20 , F27B21/00
摘要： PURPOSE:To prevent the splashing of the raw materials of a sintering bed layer and the sticking of the raw materials to partition walls, etc., with the above ignition furnace of the sintering machine by disposing a radiation heat transfer plate between a burner and a raw material surface. CONSTITUTION:The radiation least transfer plate 5 is disposed between the burner 4 and the surface of the sintering bed layer 6 of the ignition furnace 1 of the sintering machine and the surface of the sintering bed layer 6 is fired by the radiation of the heat transferred from flames at the time of sintering the sintering bed layer 6 by using the burner 4. The splashing of the raw materials of the sintering bed layer 6 and the sticking of the raw materials to the part between the ignition furnace 1 and a heat transfer chamber 2 are prevented in this way and the working efficiency is improved.

10. 发明专利

JPH03183728A METHOD FOR STORING STOCK IN STOCK YARD 失效
公开(公告)号：JPH03183728A
公开(公告)日：1991-08-09
申请号：JP32192189
申请日：1989-12-12
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , KUROSAWA SHINICHI , HIRAOKA HIDENOBU
IPC分类号： C22B1/00
摘要： PURPOSE:To prevent the collapse of stock and to increase the amt. of stock to be stored by equipping a sidewall along the moving direction of a stacker running a stock yard and piling up stock along the sidewall. CONSTITUTION:Along the moving direction of a stacker 1 running a stock yard, a sidewall 2 is equipped vertical to the side of the stacker 1 in a stock piling-up place 3. Then, stock is piled up to form a pile 4 of stock having the angle theta and width L in the foot. By the above, the height of the pile 4 of stock increases, by which the amt. of stock to be stored can be increased.

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