公开(公告)号：US4238121A

公开(公告)日：1980-12-09

申请号：US948329

申请日：1978-10-04

申请人： Akira Harita ,  Tadashi Morimoto ,  Toshio Kanatani ,  Ryoji Uchimura

发明人： Akira Harita ,  Tadashi Morimoto ,  Toshio Kanatani ,  Ryoji Uchimura

IPC分类号： C21C5/48 ,  C21C5/44

CPC分类号： C21C5/48

摘要： A hearth structure of an oxygen-bottom-blowing converter comprises hearth bricks including a number of brick row units, each of which is provided with or without one tuyere therein to eliminate thermal stresses otherwise be caused by two tuyeres included in one brick row unit. The hearth bricks preferably include at least one row of bricks not including a tuyere arranged between the brick row units. Bricks around tuyeres are unburned magnesia-carbon or magnesia-dolomite-carbon bricks including an amount of carbon 7-35%, preferably 10-30% or the most preferably 20% by weight and including magnesia or magnesia-dolomite as grains and thicknesses of refractory mortar as joints between the bricks corresponding to 0.5-2.5% of the maximum width of the bricks, thereby improving the durability of the hearth structure and hence the converter.

摘要翻译： 氧气底吹转炉的炉底结构包括炉底砖，其包括多个砖排单元，每个砖排单元在其中设置有或不具有一个风口，以消除另外由包括在一个砖排单元中的两个风口引起的热应力。 炉底砖优选地包括至少一排不包括布置在砖排单元之间的风口的砖。 风口周围的砖块是未燃烧的氧化镁 - 碳或氧化镁 - 白云石 - 碳砖，其含量为7-35％，优选为10-30％，最优选为20％（重量），并且包括氧化镁或氧化镁 - 白云石作为晶粒和厚度 耐火砂浆作为砖块之间的接缝，相当于砖的最大宽度的0.5-2.5％，从而提高炉床结构和因此转炉的耐久性。

公开(公告)号：US5728348A

公开(公告)日：1998-03-17

申请号：US684093

申请日：1996-07-19

申请人： Nozomu Tamura ,  Sumio Yamada ,  Masaru Washio ,  Toshio Kanatani

发明人： Nozomu Tamura ,  Sumio Yamada ,  Masaru Washio ,  Toshio Kanatani

IPC分类号： B22D41/00 ,  C21C7/10 ,  F27D1/18 ,  C21B7/02

CPC分类号： C21C7/10 ,  B22D41/00

摘要： Ladles used for vacuum refining processes, for example a VOD process, are provided with covers to cover openings of ladles. The covers generally consist of refractories, which are required to have excellent resistance to thermal spalling due to heat cycles and not inhibit decarbonization during refining processes of molten steel. The ladle cover comprises a refractory having a carbon content 5 wt % or more. Preferably, a refractory has a carbon content 5 wt % or more is used for a central section of the ladle cover, and a refractory having a carbon content less than 5 wt % is used for peripheral sections of the ladle cover.

摘要翻译： 用于真空精炼过程的钢瓶，例如VOD工艺，设有盖子以覆盖钢包的开口。 覆盖层通常由耐火材料组成，耐火材料由于热循环而具有优异的抗散热性，并且在钢水精炼过程中不会抑制脱碳。 钢包盖包括碳含量为5重量％以上的耐火材料。 优选地，耐火材料具有5重量％以上的碳含量用于钢包盖的中心部分，并且碳含量小于5重量％的耐火材料用于钢包盖的周边部分。