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1. 发明专利

JPS5676379A GRINDING AND SWEEPING MATERIAL FOR STEEL SURFACE 失效
公开(公告)号：JPS5676379A
公开(公告)日：1981-06-23
申请号：JP14978479
申请日：1979-11-19
申请人： NIPPON STEEL CORP , KUNIMIYAMA KK
发明人： MIZOGUCHI IKUO , ONODERA MASAAKI , TOCHIO YASUSHI
IPC分类号： B24C11/00
摘要： PURPOSE:To obtain the inexpensive grinding and sweeping material exellent in grinding and sweeping properties, by blending blast furnace slag. CONSTITUTION:The so-called blast furnace water granulated slag that is obtained by rapidly cooling blast furnace slag is made up of a crystaline material and a vitreous material and the vitreous material is predominantly present therein. The blast furnace water granulated slag itself is not suitable to substitute for a steel surface grinding and sweeping material because its strength is low. In the present invention, a blast furnace slag is blended with a converter slag and then water-granulated to improve the water granulation strength to the optimum value as a grinding and sweeping material. Particularly, in densifying and rigidifying the blast furnace slag with the converter slag, to suppress the disintegration of the water granulation which is unfavorable to grinding and sweeping, the amount of the converter slag to be added is restricted up to 7wt%. As a result, the grinding and sweeping material having a long life and excellent in grinding and sweeping properties can be obtained.

3. 发明专利

JPS6368689A GROUND IMPROVER 失效
公开(公告)号：JPS6368689A
公开(公告)日：1988-03-28
申请号：JP21303986
申请日：1986-09-10
申请人： NIPPON STEEL CORP , HIROHATA KOUSAI KAKO KK
发明人： MAEDA AKIRA , KINUGAWA HIDEAKI , ONODERA MASAAKI , NAKAOKA TOSHIMASA
IPC分类号： C09K17/00 , C09K17/02 , C09K17/06 , C09K103/00 , E02D3/12
摘要： PURPOSE:To provide a ground improver which is excellent in safety and low in cost, and permits ready handling and which comprises particular combustion ash and coarse quenched blast furnace slag grains. CONSTITUTION:Combustion ash (A) comprising coal cinders or fly ash, gypsum, calcium sulfite, quick lime, etc., produced as a by-product in a fluidized bed combustion furnace to be charged with coals and limestones is mixed with a quenched blast furnace slag (B) as it is or coarse grains thereof obtd. by mildly grinding the same under a bulldozer etc. according to necessity in an A to B wt. ratio of 50-70:50-30.

6. 发明专利

JPS56127717A STEEL MAKING PROCESS DISCHARGING SLAG SUITED AS PHOSPHATIC FERTILIZER 失效
公开(公告)号：JPS56127717A
公开(公告)日：1981-10-06
申请号：JP2979080
申请日：1980-03-11
申请人： NIPPON STEEL CORP
发明人： ONODERA MASAAKI , ONO YOSHIO , NISHIKAWA NOBUHIRO
IPC分类号： C05B5/00 , C05D3/04 , C21C1/02
摘要： PURPOSE:To prevent degradation of the effectiveness of produced slag as phosphatic fertilizer by a method wherein CaCl2 and CaF2 are used as a melting-drop agent of a slag mainly consisting of lime which is used in the dephosphorizing and desulfurizing process of a multistage steel making process. CONSTITUTION:A strongly basic slag essentially consisting of CaO is used in the dephosphorizing dand desulfuring process of a steel making process which is multistaged by desilicate-dephosphorization desulfurization-decarburization, and steel making refining processes. In this process, CaCl2 and CaF2 are used as a melting- drop agent. The molten slag is rapidly cooled with water to cause fine crystals of phosphate cpd. and to enhance its solubility in citric acid. Alternatively, the molten slag is gradually cooled, crushed to a proper size, heated to 800-1,100 deg.C, and maintained at that temperature for about 30-130min. The obtained slag includes more than 5% of phosphoric acid and can be effectively used as a phosphatic fertilizer.

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