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1. 发明专利

JPH02235602A MANUFACTURE OF CALCIUM SILICATE MOLDED BODY AND ROLLER USED FOR METHOD THEREOF 失效
公开(公告)号：JPH02235602A
公开(公告)日：1990-09-18
申请号：JP5569289
申请日：1989-03-08
申请人： UNIV TOHOKU , ONODA CEMENT CO LTD , ONODA ALC KK
发明人： TAKAHASHI HIDEAKI , WADA CHIHARU , TERAMURA TOSHIFUMI
IPC分类号： B28B3/12
摘要： PURPOSE:To enable liquid to be dehydrated efficiently and uniformly by supplying suspension consisting of the particulate or fibrous matter of calcium silicate hydrated substance and liquid between a pair of suction rollers having perforation in its surface and reaching a vacuum source, and treating it through vacuum suction filtration, simultaneously, pressing the solid in the suspension liquid. CONSTITUTION:As a material S is inputted into a hopper 1, the hopper 1 supplies it between a pair of the first rollers 2 while reserving the material S at a certain quantity or more constantly. The water in the material S through the perforation 19 is vacuum suction-filtrated, and the material S is dehydrated successively. Both rollers 2a, 2b of a pair of the first rollers 2 act to squeeze the material S in order to press-mold the solid in the material S whereby a molded body P having a predetermined thickness is formed consecutively. Both rollers 3a, 3b of a pair of the second roller 3 and both rollers 4a, 4b of a pair of the third rollers 4 dehydrate further the water in the molded body P through vacuum suction filtration, and press-mold the molded body P up to the thickness as required, and then delivery it to the next heating process B.

2. 发明专利

JPH03109274A METHOD FOR JOINING CALCIUM SILICATE MOLDING 失效
公开(公告)号：JPH03109274A
公开(公告)日：1991-05-09
申请号：JP24530989
申请日：1989-09-22
申请人： UNIV TOHOKU , ONODA CEMENT CO LTD , ONODA ALC KK
发明人： TAKAHASHI HIDEAKI , TERAMURA TOSHIFUMI , WADA CHIHARU
IPC分类号： C04B37/00 , B28B3/00
摘要： PURPOSE:To produce the large and thick calcium silicate molding by superposing the surfaces to be joined of plural pieces of the calcium silicate moldings and joining and integrating the moldings under heating and pressurizing. CONSTITUTION:The calcium silicate moldings are joined by the following (a) or (b) method: (a) The surfaces to be joined of plural pieces of the calcium silicate moldings are superposed on each other and a pressure is applied on the surfaces to be joined to joint and integrate the moldings when the temp. of the superposed moldings attains 900 to 1350 deg.C. (b) Plural pieces of the calcium silicate moldings are heated and the surfaces to be joined are superposed on each other at the point of the time when the individual temps. attain 900 to 1350 deg.C, then the pressure is applied on the surfaces to be joined to join and integrate the surfaces. The powder of the calcium silicate or the mixture composed of the calcium silicate and org. binder may be interposed between the surfaces to be joined of plural pieces of the calcium silicate moldings in the above-mentioned method. The characteristics of the surfaces to be joined in this case may be relatively rough.

3. 发明专利

JPH01270569A PRODUCTION OF CALCIUM SILICATE MOLDED ARTICLE HAVING HEAT RESISTANCE AND CUTTING PROPERTY 失效
公开(公告)号：JPH01270569A
公开(公告)日：1989-10-27
申请号：JP9564588
申请日：1988-04-20
申请人： ONODA CEMENT CO LTD , ONODA ALC KK
发明人： TAKAHASHI HIDEAKI , WADA CHIHARU , KUNUGIZA KEITAROU
IPC分类号： C04B35/22
摘要： PURPOSE:To obtain lightweight and readily handleable molded articles of calcium silicate having heat resistance and heat-resistant strength by pressurizing molded articles of xonotlite calcium silicate in a heated state at a specific temperature. CONSTITUTION:Zonotlite slurry synthesized by an autoclave by a conventional procedure is dehydrated, press molded and dried at about 120 deg.C for about 12 hours to give molded articles, which are pressurized under in a short time in a state heated at a temperature (700-1,000 deg.C) to cause phase transition from xonotlite to beta-wollastonite and calcined by raising the temperature to 1,200 deg.C.

4. 发明专利

JPH01164767A MOLD FOR HOT FORMING AND PRODUCTION THEREOF 失效
公开(公告)号：JPH01164767A
公开(公告)日：1989-06-28
申请号：JP23654288
申请日：1988-09-22
申请人： ONODA CEMENT CO LTD , ONODA ALC KK
发明人： TSUKIYAMA KOICHI , TAKAHASHI HIDEAKI , TSUTSUMI KOICHI , WATANABE KOJI , WADA CHIHARU , KUNUGI KEITAROU , TERAMURA TOSHIFUMI
IPC分类号： B21J13/02 , B28B3/02 , C04B35/64
摘要： PURPOSE:To obtain a mold for hot forming having superior heat resistance, strength, hardness, machinability and high plane accuracy and useful to produce a large-sized ingot by treating xonotlite under specified conditions. CONSTITUTION:An aq. slurry of xonotlite produced on an industrial scale is dehydrated under pressure and molded and the molded body is dried at 100-120 deg.C and heated to bulk sp. gr., >=100kgf/cm bending strength and >=4 Vickers hardness.

5. 发明专利

JPS63215543A METHOD OF CONTINUOUSLY ROLLING CALCIUM SILICATE- BASE COMPOSITE MATERIAL 失效
公开(公告)号：JPS63215543A
公开(公告)日：1988-09-08
申请号：JP4512887
申请日：1987-03-02
申请人： ONODA ALC KK , UNIV TOHOKU
发明人： TAKAHASHI HIDEAKI , TERAMURA TOSHIFUMI
IPC分类号： B28B3/12 , B28B1/50 , B28B1/52 , B28B3/00 , C04B28/18 , C04B40/02

6. 发明专利

JPS62260713A PRODUCTION OF XONOTLITE FIBER 失效
公开(公告)号：JPS62260713A
公开(公告)日：1987-11-13
申请号：JP10448086
申请日：1986-05-07
申请人： UNIV TOHOKU , ONODA ALC KK
发明人： TAKAHASHI HIDEAKI , SHOJI TETSUO , TERAMURA TOSHIFUMI
IPC分类号： C01B33/24 , D01F9/08
摘要： PURPOSE:To increase length and aspect ratio of a xonotlite fiber, by reacting calcium and silica used as raw materials in a continuous hydrothermal reactor under a stable condition to form xonotlite in one step. CONSTITUTION:A raw material releasing Ca in an aqueous solution and a raw material releasing silica in an aqueous solution or a raw material releasing both Ca and silica in an aqueous solution is used as the starting material. For example, former two raw materials are preliminarily mixed, charged in a tank 1, converted to an aqueous solution or slurry in the tank and transferred to an autoclave 4 with a high-pressure pump. The autoclave 3 is heated with a heater 4 attached to the outer circumference of the tank while passing a raw material mixture liquid through the autoclave. The rate of temperature rise of the raw material liquid can be arbitrarily varied by varying the flow rate of the raw material liquid or the performance of the heater 4. The raw materials are made to react with each other in the flow to form xonotlite from the raw material in one step. The liquid containing the reaction product is temporarily stored in a tank 5 and filtered (6).

7. 发明专利

JPH04202048A METHOD AND APPARATUS FOR PRODUCING CALCIUM SILICATE MOLDING 失效
公开(公告)号：JPH04202048A
公开(公告)日：1992-07-22
申请号：JP33634890
申请日：1990-11-30
申请人： UNIV TOHOKU , ONODA CEMENT CO LTD
发明人： TAKAHASHI HIDEAKI , WADA CHIHARU
IPC分类号： C04B35/22
摘要： PURPOSE:To allow the successive and continuous execution of the heating treatment of the calcium silicate moldings by repeating a stage for carrying the calcium silicate moldings of raw materials into a furnace kept at a permissible upper limit temp. or below and a stage for holding the moldings in the above-mentioned furnace until the moldings attain a uniform temp., thereby maintaining the moldings at the prescribed uniform temp. CONSTITUTION:The stage for carrying the calcium silicate moldings of the raw materials into the furnace kept at the permissible upper limit temp. or below and the stage for holding the moldings in the above-mentioned furnace until the moldings attain the uniform temp. are repeated to maintain the moldings at the prescribed uniform temp. (raw materials: 1 to 4, products: W). The device provided with the plural furnaces (e.g.; 11 to 20 are heating furnaces, 21 to 30 are cooling furnaces) disposed in series, a temp. controller (50: for the heating stage, 56: for the cooling stage) which controls the temp. difference between the above-mentioned furnaces adjacent to each other to the permissible max. temp. difference or below, a transporting device 57 which is provided through the inside of the respective furnaces and a means for controlling the transporting device is used to execute the above-mentioned production process.

8. 发明专利

JPH04349126A PRODUCTION OF HIGH SILICA GLASS 失效
公开(公告)号：JPH04349126A
公开(公告)日：1992-12-03
申请号：JP8714491
申请日：1991-01-25
申请人： UNIV TOHOKU , TOHOKU ELECTRIC POWER CO , ONODA CEMENT CO LTD
发明人： TAKAHASHI HIDEAKI , MORIYA TAKEHIKO , TSUKIYAMA KOICHI , YUDA SHUJI
IPC分类号： C03B8/02 , C03B20/00 , C03C1/00 , C03C3/06
摘要： PURPOSE:To produce high silica glass having alkali resistance with an aq. sodium silicate soln. as starting material. CONSTITUTION:Sodium silicate having =800 deg.C at which glass does not devitrify.

9. 发明专利

JPH04305031A PRODUCTION OF SILICA GLASS 失效
公开(公告)号：JPH04305031A
公开(公告)日：1992-10-28
申请号：JP9345991
申请日：1991-03-30
申请人： UNIV TOHOKU , TOHOKU ELECTRIC POWER CO , ONODA CEMENT CO LTD
发明人： TAKAHASHI HIDEAKI , MORIYA TAKEHIKO , TSUKIYAMA KOICHI , YUDA SHUJI
IPC分类号： C01B33/143 , C03B8/02 , C03B20/00 , C03C3/06
摘要： PURPOSE:To produce a silica glass from cristobalite and to recover and reutilize the residue resulting from impurities in production. CONSTITUTION:An aq. soln. of the sodium silicate having a low content of water prepared from cristobalite is treated with an aq. ammonium nitrate soln. to obtain hydrous silica glass. In this case, the ammonia generated in the treatment with ammonium nitrate and the sodium nitrate obtained when the treated liq. is filtered are respectively recovered. A siliciferous component is added to the sodium nitrate and heated, the NO2 gas is allowed to react with the ammonia to form ammonium nitrate, the ammonium nitrate is used for treating the solidified water glass, the remaining Na2O and the siliciferous component are heated and subjected to reaction, the reaction product is separated into solid and liq., and the separated liq. is used as a part of the material to form the aq. soln. of sodium silicate. soln.

10. 发明专利

JPH0664935A CONTINUOUS PRODUCTION OF WATER-GLASS FIBER 失效
公开(公告)号：JPH0664935A
公开(公告)日：1994-03-08
申请号：JP22293792
申请日：1992-08-21
申请人： UNIV TOHOKU , TOHOKU ELECTRIC POWER CO , ONODA CEMENT CO LTD
发明人： TAKAHASHI HIDEAKI , MORIYA TAKEHIKO , TSUKIYAMA KOICHI , YUDA SHUJI
IPC分类号： C03B37/08 , C03C13/00 , D01D5/04 , D01F9/08 , D02G3/18
摘要： PURPOSE:To stabilize the quality of a water-glass fiber by introducing CO2 gas into a spinning atmosphere having a prescribed temperature and spinning water-glass in the CO2 atmosphere having a prescribed CO2 gas concentration. CONSTITUTION:A water-glass spinning dope melted by heating with a 1st heater 8 is pressed in a cylinder 6 and extruded through a spinning nozzle 7 having a prescribed nozzle diameter into an acrylic resin pipe to effect the continuous spinning of the water-glass. At the same time, CO2 gas is continuously introduced through a gas-introducing port 14 of a drum chamber 4 to keep a nozzle part 2, a cylindrical furnace 3 and the drum chamber 4 to a CO2 atmosphere having a CO2 concentration of 100-8,000ppm. The spun water-glass fiber is brought into contact with CO2 gas in the course of passing through the CO2 gas atmosphere of 100-130 deg.C) to instantaneously form crystals of Na2CO3 and Na2CO3.H2O on the surface of the fiber. The fiber is dried by heating with a 2nd heater 9 of the cylindrical furnace 3 and a 3rd heater 12 placed under the drum chamber 4 and wound on a winding drum 11 to obtain a water-glass fiber having stable quality and free from blister or bubble.

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