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1. 发明专利

JPS6254008A MANUFACTURE OF HIGH-CHROMIUM ALLOY STEEL BY REFINING 失效
公开(公告)号：JPS6254008A
公开(公告)日：1987-03-09
申请号：JP19307985
申请日：1985-09-03
申请人： NIPPON STEEL CORP
发明人： YOSHIDA MASASHI , ISHII HIROMI , NAGI MINORU
IPC分类号： C21C5/32 , C21C5/28 , C21C5/34 , C21C5/35
摘要： PURPOSE:To carry out refining by blowing in the high yield of Cr when a high-Cr alloy steel such as a stainless steel is refined by blowing in a top and bottom blowing converter, by quantifying the correlation between the amount of oxygen blown from the top and the concns. of Cr and C so as to rapidly deal with a change in the composition of the steel. CONSTITUTION:A steel bath contg. 0.2-1wt% C and 8-20wt% Cr is refined at 1,550-1,800 deg.C in a top and bottom blowing converter by blowing gas from the bottom by >=0.05Nm /min per 1ton molten steel and oxygen from the top by /min per 1ton molten steel. At this time, oxygen is blown so as to regulate RI value defined by the formula to 20-40. In the formula, [Cr] is the concn. (%) of Cr in the steel bath, [C] is the concn. (%) of C in the steel bath and KO2 is the amount (Nm /min/ton) of oxygen blown from the top.

2. 发明专利

JPS5947317A Method for dephosphorizing molten iron by blowing slag forming agent into molten iron bath 失效
标题翻译：通过将滑石成型剂转化成铁矿石浴将钼铁脱磷的方法
公开(公告)号：JPS5947317A
公开(公告)日：1984-03-17
申请号：JP15510182
申请日：1982-09-08
申请人： Nippon Steel Corp
发明人： SATOU SHINGO , INOUE TAKASHI , NAGI MINORU , KINOSHITA KAZUHIRO
IPC分类号： C21C7/072 , C21C1/02
CPC分类号： C21C1/02
摘要： PURPOSE:To dephosphorize effectively molten iron by blowing only a slag forming agent for dephosphorization into the molten iron at a specified depth from the surface of the molten iron bath through a lance with an inert gas and by adding an oxidizing agent to the surface of the bath at the same time. CONSTITUTION:A slag forming agent 7 for dephosphorization is blown into molten iron 2 in a molten iron ladle 1 at >=500mm. depth from the surface of the molten iron bath through a lance 4 with an inert gas 6 as a carrier gas. At the same time, an auxiliary slag forming agent 9 and an oxidizing agent 8 are added to the surface of the bath. The granules of the blown slag forming agent 7 diffuse in the molten iron 2 and rise to the surface of the bath while being heated. The granules become an active state and react efficiently with P2O5 formed by the reaction of the oxidizing agent 8 with phosphorus in the molten iron 2. The P2O5 is fixed in slag 3.
摘要翻译：目的：通过在铁水槽表面的特定深度，仅通过吹入惰性气体的喷枪，仅将熔渣形成剂吹入铁水，从而有效地对铁水进行脱磷，并将氧化剂加入到同时洗澡构成：用于去磷化的熔渣形成剂7在> 500mm的铁水包1中被吹入铁水2中。从作为载气的惰性气体6通过喷枪4从铁水槽的表面开始深度。同时，将辅助成渣剂9和氧化剂8加入到浴的表面。吹出的熔渣形成剂7的颗粒在铁水2中扩散并在被加热的同时上升到浴槽的表面。颗粒成为活性状态，并且通过氧化剂8与铁水2中的磷反应形成的P2O5有效反应.P2O5固定在炉渣3中。

3. 发明专利

JPS60162712A METHOD FOR BLOWING POWDER INTO MOLTEN IRON 失效
公开(公告)号：JPS60162712A
公开(公告)日：1985-08-24
申请号：JP1607984
申请日：1984-02-02
申请人： NIPPON STEEL CORP
发明人： INOUE TAKASHI , NAGI MINORU , SATOU HISASHI , YONENAKA EIZOU
IPC分类号： C21C1/02
摘要： PURPOSE:To prevent decrease in temp. of a molten iron and to improve additionally the effect of dephosphorization in the stage of blowing powder to the molten iron and dephosphorizing the molten iron by blowing simultaneously a slag forming agent and iron oxide respectively with O2 and N2 as a carrier gas through the inside and outside pipes of a lance having a double-pipe construction to the molten iron. CONSTITUTION:A slag forming agent such as quicklime, fluorite, etc. is blown together with O2 via the inside pipe 1 of a lance body 4 into a molten iron and iron oxide is blown together with N2 through a blow-off port 3 into the molten iron. Then, the iron oxide blown near the high temp. region where the oxidation reaction of iron by O2 arises is decomposed to react with the slag forming agent, by which Ca is formed and therefore the efficiency of dephosphorization is considerably improved as compared to the case in which the iron oxide alone is blown to the molten iron. Since the ratio between the slag forming agent and O2 is important, the slag forming agent in a blow tank 5 is controlled in the rate of transportation while the number of revolution of a feeder 7 is controlled with the gaseous O2 controlled in the flow rate by a gaseous O2 control valve 6 as a carrier gas.

4. 发明专利

JPS6331526B2 失效
公开(公告)号：JPS6331526B2
公开(公告)日：1988-06-24
申请号：JP19307985
申请日：1985-09-03
申请人： NIPPON STEEL CORP
发明人： YOSHIDA MASASHI , ISHII HIROMI , NAGI MINORU
IPC分类号： C21C5/32 , C21C5/28 , C21C5/34 , C21C5/35

5. 发明专利

JPS5953612A Dephosphorizing method by simultaneous blowing of gaseous oxygen and dephosphorizing agent under bath surface 失效
标题翻译：气相氧化和脱水剂在浴室表面下同时吹扫的脱磷方法
公开(公告)号：JPS5953612A
公开(公告)日：1984-03-28
申请号：JP16413082
申请日：1982-09-22
申请人： Nippon Steel Corp
发明人： SATOU SHINGO , INOUE TAKASHI , NAGI MINORU , TAKAHASHI NORIO
IPC分类号： C21C1/02
CPC分类号： C21C1/02
摘要： PURPOSE:To accelerate effectively dephosphorization reaction by blowing simultaneously a dephosphorizing agent under the bath surface of molten iron with an inert gas as a carrier gas while blowing O2 under the bath surface of the molten iron, respectively through an immersion lance. CONSTITUTION:Molten iron is desiliconized on the outside of a converter prior to converter refining and the slag formed at that time is removed. Gaseous oxygen 4 is blown through an immersion lance 3 under the bath surface of the molten iron 2 after the above-mentioned desiliconization in a molten iron ladle 1; at the same time, quicklime 6 as a dephosphorizing agent is blown under the bath surface of the molten iron 2 with N2 5 as a carrier gas. The lance 3 in this case is immersed under the bath surface of the molten iron, more preferably >=500mm. depth. O2 is blown preferably at 0.03-0.5Nm /min flow rate per ton of the molten iron. The more effective dephosphorization reaction is performed by adding mill scale 7 further onto the bath surface in the above-described dephosphorization treatment.
摘要翻译：目的：通过在惰性气体作为载气同时吹入铁液浴表面的同时将脱磷剂分别吹入铁水浴槽表面下方的O2，从而有效地促进脱磷反应。构成：在转炉精炼之前，将铁水在转炉外部进行脱硅，同时除去形成的炉渣。在铁水包1中进行上述脱硅后，将气态氧气吹入熔融铁2的熔池表面下方，同时，作为脱磷剂的生石灰6以N2 5作为载气吹入铁水2的熔池表面。在这种情况下，喷枪3浸在铁水的浴表面下，更优选> = 500mm。深度。优选以每吨铁水0.03-0.5Nm 3 / min流速吹送O 2。在上述脱磷处理中，通过在轧制槽表面上进一步加入轧制规模7进行更有效的脱磷反应。

6. 发明专利

JPS5959815A Method for dephosphorizing molten iron 失效
标题翻译：用于去磷化铁的方法
公开(公告)号：JPS5959815A
公开(公告)日：1984-04-05
申请号：JP16956382
申请日：1982-09-30
申请人： Nippon Steel Corp
发明人： SATOU SHINGO , INOUE TAKASHI , NAGI MINORU
IPC分类号： C21C1/02 , C21C1/04
CPC分类号： C21C1/04
摘要： PURPOSE:To reduce the load of dephosphorization by desiliconizing molten iron to a prescribed Si content before dephosphorization, and removing slag formed by the desiliconization so that it remains by a prescribed amount. CONSTITUTION:Molten iron is desiliconized to
摘要翻译：目的：通过在脱磷前将铁水脱硅至规定的Si含量，减少脱磷负荷，除去脱硅后的渣，使其保留规定量。构成：在脱磷之前，将铁水脱硅至<= 0.2％Si含量，并且去除通过脱硅形成的炉渣，使其在每1ton铁水中保持在0.5-5kg的脱磷容器中。脱硅铁水脱磷。通过这种方法，转化器阶段的脱磷负荷降低。

7. 发明专利

JPS5831012A PREFERENTIAL DESILICONIZING METHOD FOR MOLTEN IRON BY BLOWING OF GASEOUS OXYGEN 失效
公开(公告)号：JPS5831012A
公开(公告)日：1983-02-23
申请号：JP12960981
申请日：1981-08-19
申请人： NIPPON STEEL CORP
发明人： SATOU SHINGO , INOUE TAKASHI , NAGI MINORU , KAWACHI YUUJI
IPC分类号： C21C1/04 , C21C5/28 , C21C5/46
摘要： PURPOSE:To desiliconize molten iron with high preferential desiliconizing oxygen efficiency while suppressing temp. loss as far as possible by controlling the rate of supplying the gaseous oxygen to be blown under the surface of the molten iron according to the content of Si therein. CONSTITUTION:In accelerating preferential desiliconization by blowing gaseous oxygen under the surface of molten iron, the rate Vo2 for supplying the gaseous oxygen is controlled in accordance with the equation (Vo2; the rate of supplying the gaseous oxygen, Nm /min/t.p, %Si: the content of si in the molten iron, %). According to this method, only the Si is oxidized preferentially by suppressing the oxidation of C and Mn in the molten iron and the temp. loss during the desiliconization is suppressed.

8. 发明专利

JPS56136255A CONTROL SYSTEM FOR CHARGING DEOXIDIZER 失效
公开(公告)号：JPS56136255A
公开(公告)日：1981-10-24
申请号：JP3749180
申请日：1980-03-26
申请人： NIPPON STEEL CORP , HITACHI LTD , HITACHI ENG CO LTD
发明人： TAKAHASHI MICHIAKI , HARIGAI YUUJI , NAGI MINORU , KAYAMORI TAKAAKI
IPC分类号： B22D7/00 , B22D27/20
摘要： PURPOSE:To automatically control the charging of a deoxidizer by obtaining the charging amount and charging timing of the deoxidizer for the next mold from the actual charing record of the deoxidizer for the previous mold. CONSTITUTION:When injection is started, an injection rate sampling device 18 monitors the rate of injection. On the other hand, when a rotary valve operates, a charging timing memory device 16 stores the rate of injection from an injection rate detector 19 and a charging sampling device 15. On completion of the entire injection, the total injection rate is obtained by an injection rate determining device 20. Next, when the intended injection rate to the next mold is set by an injection rate setter 22, an injection rate determining device 21 obtains a total intended injection rate Ns, and transmits the same to a sectional injection rate determining device 13. The device 13 obtains charging rates alpha', beta', gamma', and further obtains sectional charging times. A charging timing determining device 12 determines timings in such a manner as to charge the deoxidizer at uniform intervals. Next, on starting of the injecting of the next mold, a comparator 11 monitors charging timings with 19 and 17, and transmits the same to a rotary valve driving device 10, thereby performing the charging of the deoxidizer.

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