SE443358B - Forfarande och apparat for behandling av foremal med partikelformigt material - Google Patents

Forfarande och apparat for behandling av foremal med partikelformigt material

Info

Publication number: SE443358B
Authority: SE; Sweden
Prior art keywords: particulate material; treatment room; container; dispersion; electromagnetic field
Prior art date: 1979-10-23

Application number

SE8007388A

Other languages

English (en)

Swedish (sv)

Other versions

SE8007388L (sv

Inventor

D C Wright

G T Simpkin

Original Assignee

Pilkington Brothers Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1979-10-23

Filing date

1980-10-21

Publication date

1986-02-24

1980-10-21 Application filed by Pilkington Brothers Ltd filed Critical Pilkington Brothers Ltd

1981-04-24 Publication of SE8007388L publication Critical patent/SE8007388L/xx

1986-02-24 Publication of SE443358B publication Critical patent/SE443358B/sv

Links

239000000463 material Substances 0.000 title claims description 27
238000000034 method Methods 0.000 title claims description 20
239000011236 particulate material Substances 0.000 claims description 45
239000011521 glass Substances 0.000 claims description 44
239000002245 particle Substances 0.000 claims description 27
239000006185 dispersion Substances 0.000 claims description 25
230000005672 electromagnetic field Effects 0.000 claims description 20
229910000859 α-Fe Inorganic materials 0.000 claims description 20
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 18
230000006698 induction Effects 0.000 claims description 14
239000000203 mixture Substances 0.000 claims description 14
230000005291 magnetic effect Effects 0.000 claims description 13
238000001816 cooling Methods 0.000 claims description 12
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
HPYIMVBXZPJVBV-UHFFFAOYSA-N barium(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Ba+2] HPYIMVBXZPJVBV-UHFFFAOYSA-N 0.000 claims description 11
150000004684 trihydrates Chemical class 0.000 claims description 11
229910052712 strontium Inorganic materials 0.000 claims description 7
CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 7
229910052742 iron Inorganic materials 0.000 claims description 5
229910052788 barium Inorganic materials 0.000 claims description 4
DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 4
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
229910052688 Gadolinium Inorganic materials 0.000 claims description 3
229910052782 aluminium Inorganic materials 0.000 claims description 3
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
229910000323 aluminium silicate Inorganic materials 0.000 claims description 3
229910052804 chromium Inorganic materials 0.000 claims description 3
239000011651 chromium Substances 0.000 claims description 3
HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 3
238000010438 heat treatment Methods 0.000 claims description 3
150000004682 monohydrates Chemical class 0.000 claims description 3
239000005357 flat glass Substances 0.000 claims description 2
UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims 2
238000013019 agitation Methods 0.000 claims 1
238000013007 heat curing Methods 0.000 claims 1
229910000030 sodium bicarbonate Inorganic materials 0.000 claims 1
235000017557 sodium bicarbonate Nutrition 0.000 claims 1
230000000694 effects Effects 0.000 description 8
238000004804 winding Methods 0.000 description 8
238000001029 thermal curing Methods 0.000 description 7
238000002156 mixing Methods 0.000 description 6
239000003302 ferromagnetic material Substances 0.000 description 5
229910052751 metal Inorganic materials 0.000 description 5
239000002184 metal Substances 0.000 description 5
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
239000003054 catalyst Substances 0.000 description 4
239000000696 magnetic material Substances 0.000 description 4
239000012528 membrane Substances 0.000 description 4
239000000843 powder Substances 0.000 description 4
239000011819 refractory material Substances 0.000 description 4
238000001723 curing Methods 0.000 description 3
238000006073 displacement reaction Methods 0.000 description 3
239000013618 particulate matter Substances 0.000 description 3
239000000126 substance Substances 0.000 description 3
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
229910052802 copper Inorganic materials 0.000 description 2
239000010949 copper Substances 0.000 description 2
238000005243 fluidization Methods 0.000 description 2
239000006249 magnetic particle Substances 0.000 description 2
150000002739 metals Chemical class 0.000 description 2
239000004033 plastic Substances 0.000 description 2
229920003023 plastic Polymers 0.000 description 2
230000001105 regulatory effect Effects 0.000 description 2
239000004576 sand Substances 0.000 description 2
239000012780 transparent material Substances 0.000 description 2
230000032258 transport Effects 0.000 description 2
229910000838 Al alloy Inorganic materials 0.000 description 1
238000012935 Averaging Methods 0.000 description 1
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
229910000990 Ni alloy Inorganic materials 0.000 description 1
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
208000005392 Spasm Diseases 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
238000005054 agglomeration Methods 0.000 description 1
230000002776 aggregation Effects 0.000 description 1
238000005452 bending Methods 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
230000005587 bubbling Effects 0.000 description 1
239000000919 ceramic Substances 0.000 description 1
229910017052 cobalt Inorganic materials 0.000 description 1
239000010941 cobalt Substances 0.000 description 1
GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
239000002131 composite material Substances 0.000 description 1
239000011246 composite particle Substances 0.000 description 1
238000010276 construction Methods 0.000 description 1
239000000498 cooling water Substances 0.000 description 1
238000005336 cracking Methods 0.000 description 1
230000006866 deterioration Effects 0.000 description 1
230000005293 ferrimagnetic effect Effects 0.000 description 1
230000005294 ferromagnetic effect Effects 0.000 description 1
239000004615 ingredient Substances 0.000 description 1
JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
230000005415 magnetization Effects 0.000 description 1
229910052748 manganese Inorganic materials 0.000 description 1
239000011572 manganese Substances 0.000 description 1
WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
239000011159 matrix material Substances 0.000 description 1
AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
238000012856 packing Methods 0.000 description 1
239000011120 plywood Substances 0.000 description 1
229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
239000004926 polymethyl methacrylate Substances 0.000 description 1
229910052710 silicon Inorganic materials 0.000 description 1
239000010703 silicon Substances 0.000 description 1
239000000377 silicon dioxide Substances 0.000 description 1
239000010935 stainless steel Substances 0.000 description 1
229910001220 stainless steel Inorganic materials 0.000 description 1
238000007669 thermal treatment Methods 0.000 description 1
239000011701 zinc Substances 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/42—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed subjected to electric current or to radiations this sub-group includes the fluidised bed subjected to electric or magnetic fields
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/052—Tempering or quenching glass products using gas for flat or bent glass sheets being in a vertical position

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Organic Chemistry (AREA)
Combustion & Propulsion (AREA)
Materials Engineering (AREA)
Thermal Sciences (AREA)
Physics & Mathematics (AREA)
Chemical Kinetics & Catalysis (AREA)
Glass Compositions (AREA)
Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Physical Or Chemical Processes And Apparatus (AREA)
Joining Of Glass To Other Materials (AREA)
Non-Mechanical Conveyors (AREA)

SE8007388A 1979-10-23 1980-10-21 Forfarande och apparat for behandling av foremal med partikelformigt material SE443358B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB7936683		1979-10-23

Publications (2)

Publication Number	Publication Date
SE8007388L SE8007388L (sv)	1981-04-24
SE443358B true SE443358B (sv)	1986-02-24

Family

ID=10508708

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE8007388A SE443358B (sv)	1979-10-23	1980-10-21	Forfarande och apparat for behandling av foremal med partikelformigt material

Country Status (25)

Country	Link
US (1)	US4332605A (2)
JP (1)	JPS5681130A (2)
AU (1)	AU535129B2 (2)
BE (1)	BE885856A (2)
BR (1)	BR8006802A (2)
CA (1)	CA1144760A (2)
DD (1)	DD154012A5 (2)
DE (1)	DE3040030A1 (2)
DK (1)	DK447280A (2)
ES (1)	ES496168A0 (2)
FI (1)	FI67360C (2)
FR (1)	FR2467637A1 (2)
GB (1)	GB2063244B (2)
IE (1)	IE50357B1 (2)
IT (1)	IT1166497B (2)
LU (1)	LU82866A1 (2)
NL (1)	NL8005811A (2)
NZ (1)	NZ195251A (2)
PL (1)	PL126119B1 (2)
PT (1)	PT71948B (2)
SE (1)	SE443358B (2)
SU (1)	SU1160928A3 (2)
TR (1)	TR21012A (2)
YU (1)	YU270980A (2)
ZA (1)	ZA806329B (2)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BG41683A1 (en) *	1985-01-30	1987-08-14	Zrnchev	Method for magnetic stabilizing of fluidal layers
CA2956929A1 (en)	2014-07-31	2016-02-04	Corning Incorporated	Thermally tempered glass and methods and apparatuses for thermal tempering of glass
US11097974B2 (en)	2014-07-31	2021-08-24	Corning Incorporated	Thermally strengthened consumer electronic glass and related systems and methods
US10611664B2 (en)	2014-07-31	2020-04-07	Corning Incorporated	Thermally strengthened architectural glass and related systems and methods
US12338159B2 (en)	2015-07-30	2025-06-24	Corning Incorporated	Thermally strengthened consumer electronic glass and related systems and methods
KR102492060B1 (ko)	2016-01-12	2023-01-26	코닝 인코포레이티드	얇은, 열적 및 화학적으로 강화된 유리-계 제품
WO2019040818A2 (en)	2017-08-24	2019-02-28	Corning Incorporated	GLASSES HAVING ENHANCED TEMPERATURE CAPABILITIES
TWI785156B (zh)	2017-11-30	2022-12-01	美商康寧公司	具有高熱膨脹係數及對於熱回火之優先破裂行為的非離子交換玻璃
CN113727954A (zh)	2019-04-23	2021-11-30	康宁股份有限公司	具有确定的应力分布曲线的玻璃层叠物及其制作方法
US11697617B2 (en)	2019-08-06	2023-07-11	Corning Incorporated	Glass laminate with buried stress spikes to arrest cracks and methods of making the same

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2670573A (en) *	1950-02-13	1954-03-02	Jr Frederick W Sullivan	Thermal treatment of ceramic objects
BE539784A (2) *	1954-07-16
DE1258311B (de) *	1960-04-30	1968-01-04	Metallgesellschaft Ag	Verfahren und Einrichtung zum Aufbringen von UEberzuegen auf ferromagnetische Metallteile mittels Wirbelsinterns
US3423198A (en) *	1965-06-14	1969-01-21	Permaglass	Method for tempering glass utilizing an organic polymer gaseous suspension
GB1525754A (en) *	1974-10-11	1978-09-20	Exxon Research Engineering Co	Method of operating a magnetically stabilized fluidized bed
JPS51108678A (2) *	1974-10-11	1976-09-27	Exxon Research Engineering Co
GB1556051A (en) *	1975-08-29	1979-11-21	Pilkington Brothers Ltd	Thermal treatment of glass
US4115927A (en) *	1975-09-03	1978-09-26	Exxon Research & Engineering Co.	Process for operating a magnetically stabilized fluidized bed
US4136016A (en) *	1975-09-03	1979-01-23	Exxon Research & Engineering Co.	Hydrocarbon conversion process utilizing a magnetic field in a fluidized bed of catalitic particles
DE2539880A1 (de) *	1975-09-08	1977-03-10	Siemens Ag	Verfahren zur herstellung von kunststoffueberzuegen durch wirbelsintern
US4272893A (en) *	1976-08-04	1981-06-16	Exxon Research & Engineering Co.	Enhancing the characteristics of magnetically stabilized fluidized beds
GB1597617A (en) *	1977-04-11	1981-09-09	Exxon Research Engineering Co	Magnetically stabilized fluid bed process operated in the bubbling mode
DE2735767A1 (de) *	1977-08-09	1979-03-01	Exxon Research Engineering Co	Verfahren zur stabilisierung von wirbelschichten

1980
- 1980-10-08 IE IE2088/80A patent/IE50357B1/en unknown
- 1980-10-13 NZ NZ195251A patent/NZ195251A/xx unknown
- 1980-10-14 GB GB8033139A patent/GB2063244B/en not_active Expired
- 1980-10-15 ZA ZA00806329A patent/ZA806329B/xx unknown
- 1980-10-15 AU AU63300/80A patent/AU535129B2/en not_active Ceased
- 1980-10-16 CA CA000362500A patent/CA1144760A/en not_active Expired
- 1980-10-17 TR TR21012A patent/TR21012A/xx unknown
- 1980-10-20 US US06/198,617 patent/US4332605A/en not_active Expired - Lifetime
- 1980-10-20 FI FI803295A patent/FI67360C/fi not_active IP Right Cessation
- 1980-10-20 LU LU82866A patent/LU82866A1/fr unknown
- 1980-10-21 SE SE8007388A patent/SE443358B/sv unknown
- 1980-10-22 FR FR8022546A patent/FR2467637A1/fr active Granted
- 1980-10-22 ES ES496168A patent/ES496168A0/es active Granted
- 1980-10-22 NL NL8005811A patent/NL8005811A/nl not_active Application Discontinuation
- 1980-10-22 PT PT71948A patent/PT71948B/pt unknown
- 1980-10-22 IT IT68619/80A patent/IT1166497B/it active
- 1980-10-22 DK DK447280A patent/DK447280A/da unknown
- 1980-10-22 BR BR8006802A patent/BR8006802A/pt unknown
- 1980-10-23 JP JP14768380A patent/JPS5681130A/ja active Granted
- 1980-10-23 PL PL1980227467A patent/PL126119B1/pl unknown
- 1980-10-23 SU SU803000150A patent/SU1160928A3/ru active
- 1980-10-23 BE BE0/202582A patent/BE885856A/fr not_active IP Right Cessation
- 1980-10-23 YU YU02709/80A patent/YU270980A/xx unknown
- 1980-10-23 DE DE19803040030 patent/DE3040030A1/de active Granted
- 1980-10-23 DD DD80224719A patent/DD154012A5/de unknown

Also Published As

Publication number	Publication date
FI803295L (fi)	1981-04-24
DE3040030C2 (2)	1988-07-21
IE802088L (en)	1981-04-23
PL227467A1 (2)	1981-06-19
DD154012A5 (de)	1982-02-17
ZA806329B (en)	1981-11-25
AU535129B2 (en)	1984-03-01
ES8207104A1 (es)	1982-09-01
PT71948A (en)	1980-11-01
FR2467637B1 (2)	1984-05-18
LU82866A1 (fr)	1981-03-24
AU6330080A (en)	1981-04-30
IE50357B1 (en)	1986-04-02
GB2063244B (en)	1983-02-16
IT8068619A0 (it)	1980-10-22
DK447280A (da)	1981-04-24
CA1144760A (en)	1983-04-19
JPS5681130A (en)	1981-07-02
JPS638807B2 (2)	1988-02-24
SE8007388L (sv)	1981-04-24
US4332605A (en)	1982-06-01
FR2467637A1 (fr)	1981-04-30
GB2063244A (en)	1981-06-03
FI67360C (fi)	1985-03-11
IT1166497B (it)	1987-05-06
PT71948B (en)	1981-09-17
BE885856A (fr)	1981-04-23
BR8006802A (pt)	1981-04-28
YU270980A (en)	1983-12-31
PL126119B1 (en)	1983-07-30
FI67360B (fi)	1984-11-30
DE3040030A1 (de)	1981-05-14
NZ195251A (en)	1983-09-02
NL8005811A (nl)	1981-04-27
ES496168A0 (es)	1982-09-01
SU1160928A3 (ru)	1985-06-07
TR21012A (tr)	1983-05-12

Publication	Publication Date	Title
SE443358B (sv)	1986-02-24	Forfarande och apparat for behandling av foremal med partikelformigt material
US8871964B2 (en)	2014-10-28	Method for carrying out chemical reactions with the aid of an inductively heated heating medium
TW249882B (2)	1995-06-21
Tajima et al.	2005	Properties of high-density magnetic composite fabricated from iron powder coated with a new type phosphate insulator
Giri et al.	2003	Investigation on Tc tuned nano particles of magnetic oxides for hyperthermia applications
JPH0669009A (ja)	1994-03-11	希土類−鉄系磁石の製造方法
Kawashita et al.	2001	Preparation of magnetite-containing glass-ceramics in controlled atmosphere for hyperthermia of cancer
JPH03163805A (ja)	1991-07-15	超常磁性複合材料
JPH0425102A (ja)	1992-01-28	異方性透磁性複合材料
Hatta et al.	2003	Amorphous alloys with improved room-temperature saturation induction
Dean et al.	1941	Magnetic separation of ores
JP2004313008A (ja)	2004-11-11	細胞培養方法および細胞培養装置
US5964920A (en)	1999-10-12	Method and apparatus for reduction of metal particulates
JP2000182813A (ja)	2000-06-30	希土類・鉄・ボロン系永久磁石及びその製造方法
Blasse	1967	11. Magnetic compounds with spinel structure
RU162038U1 (ru)	2016-05-20	Устройство индукционного нагрева изделий нецилиндрической формы
JP2004313007A (ja)	2004-11-11	細胞培養担体、細胞培養方法および細胞培養装置
Serdyuk et al.	1982	Correlation of the Electrical Resistivity and Specific Heat of Rare-Earth Silicides of Composition R sub 5 Si sub 4
JPH0514397B2 (2)	1993-02-24
JPS60106975A (ja)	1985-06-12	加熱ガスによる金属又は合金の超微粒子膜形成法並に装置
JPS55145552A (en)	1980-11-13	Transfer equipment of magnetic powder particle
JPS58182095A (ja)	1983-10-24	熱伝達装置
JPS55141505A (en)	1980-11-05	Production of metal powder
Moyer et al.	1987	Extending the Use of Phosphorus Iron PM Parts for Magnetic Components
JPH04211102A (ja)	1992-08-03	磁気記録用六角板状Ｂａフェライト微粒子粉末の製造法