CA1220323A - Process and apparatus for fluidized calcination of diamide lime, and desulfurizing agent - Google Patents

Process and apparatus for fluidized calcination of diamide lime, and desulfurizing agent

Info

Publication number: CA1220323A
Authority: CA; Canada
Prior art keywords: lime; fluidized bed; heat medium; furnace; weight
Prior art date: 1981-04-09
Legal status (The legal status 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 status listed.): Expired

Application number

CA000399484A

Other languages

English (en)

French (fr)

Inventor

Hiroyuki Ishizaka

Atsushi Takahashi

Yoshihara Muratsubaki

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nippon Carbide Industries Co Inc

Original Assignee

Nippon Carbide Industries Co Inc

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.)

1981-04-09

Filing date

1982-03-26

Publication date

1987-04-14

1982-03-26 Application filed by Nippon Carbide Industries Co Inc filed Critical Nippon Carbide Industries Co Inc

1987-04-14 Application granted granted Critical

1987-04-14 Publication of CA1220323A publication Critical patent/CA1220323A/en

Status Expired legal-status Critical Current

Links

235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 101
235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 101
239000004571 lime Substances 0.000 title claims abstract description 101
238000001354 calcination Methods 0.000 title claims abstract description 61
238000000034 method Methods 0.000 title claims abstract description 39
OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 title claims abstract 23
230000003009 desulfurizing effect Effects 0.000 title abstract description 20
ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 110
239000000843 powder Substances 0.000 claims abstract description 60
239000000292 calcium oxide Substances 0.000 claims abstract description 55
235000012255 calcium oxide Nutrition 0.000 claims abstract description 55
239000007789 gas Substances 0.000 claims abstract description 40
239000002245 particle Substances 0.000 claims abstract description 40
230000001590 oxidative effect Effects 0.000 claims abstract description 11
239000012159 carrier gas Substances 0.000 claims abstract description 10
VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 25
239000000446 fuel Substances 0.000 claims description 16
229910000019 calcium carbonate Inorganic materials 0.000 claims description 14
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
239000000203 mixture Substances 0.000 claims description 12
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
229910052799 carbon Inorganic materials 0.000 claims description 9
239000001301 oxygen Substances 0.000 claims description 9
229910052760 oxygen Inorganic materials 0.000 claims description 9
239000007787 solid Substances 0.000 claims description 6
239000011230 binding agent Substances 0.000 claims description 4
UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
238000002347 injection Methods 0.000 claims description 2
239000007924 injection Substances 0.000 claims description 2
229940105305 carbon monoxide Drugs 0.000 claims 1
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 38
229910052742 iron Inorganic materials 0.000 abstract description 19
239000003795 chemical substances by application Substances 0.000 abstract description 9
238000001035 drying Methods 0.000 abstract description 3
238000007664 blowing Methods 0.000 description 7
238000006477 desulfuration reaction Methods 0.000 description 7
230000023556 desulfurization Effects 0.000 description 7
239000000047 product Substances 0.000 description 7
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
MVXMNHYVCLMLDD-UHFFFAOYSA-N 4-methoxynaphthalene-1-carbaldehyde Chemical compound C1=CC=C2C(OC)=CC=C(C=O)C2=C1 MVXMNHYVCLMLDD-UHFFFAOYSA-N 0.000 description 5
230000007423 decrease Effects 0.000 description 5
238000009826 distribution Methods 0.000 description 5
239000000126 substance Substances 0.000 description 5
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 4
239000007858 starting material Substances 0.000 description 4
229910052717 sulfur Inorganic materials 0.000 description 4
239000011593 sulfur Substances 0.000 description 4
229910021532 Calcite Inorganic materials 0.000 description 3
239000006227 byproduct Substances 0.000 description 3
230000000694 effects Effects 0.000 description 3
238000004519 manufacturing process Methods 0.000 description 3
239000004449 solid propellant Substances 0.000 description 3
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
239000007900 aqueous suspension Substances 0.000 description 2
239000003575 carbonaceous material Substances 0.000 description 2
238000006243 chemical reaction Methods 0.000 description 2
229910001873 dinitrogen Inorganic materials 0.000 description 2
238000001914 filtration Methods 0.000 description 2
239000010419 fine particle Substances 0.000 description 2
VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
239000002994 raw material Substances 0.000 description 2
230000009257 reactivity Effects 0.000 description 2
239000004576 sand Substances 0.000 description 2
239000000377 silicon dioxide Substances 0.000 description 2
229920002545 silicone oil Polymers 0.000 description 2
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
239000005997 Calcium carbide Substances 0.000 description 1
BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
241001315286 Damon Species 0.000 description 1
240000002989 Euphorbia neriifolia Species 0.000 description 1
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
241000282320 Panthera leo Species 0.000 description 1
210000001015 abdomen Anatomy 0.000 description 1
238000005054 agglomeration Methods 0.000 description 1
230000002776 aggregation Effects 0.000 description 1
229910052782 aluminium Inorganic materials 0.000 description 1
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 description 1
229910052849 andalusite Inorganic materials 0.000 description 1
239000007864 aqueous solution Substances 0.000 description 1
238000003556 assay Methods 0.000 description 1
239000011449 brick Substances 0.000 description 1
AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
239000000920 calcium hydroxide Substances 0.000 description 1
229910001861 calcium hydroxide Inorganic materials 0.000 description 1
JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical class [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
239000001569 carbon dioxide Substances 0.000 description 1
229910002092 carbon dioxide Inorganic materials 0.000 description 1
150000004649 carbonic acid derivatives Chemical class 0.000 description 1
239000003610 charcoal Substances 0.000 description 1
-1 clinker Substances 0.000 description 1
239000000571 coke Substances 0.000 description 1
230000000052 comparative effect Effects 0.000 description 1
150000001875 compounds Chemical class 0.000 description 1
229910052878 cordierite Inorganic materials 0.000 description 1
239000013078 crystal Substances 0.000 description 1
230000007547 defect Effects 0.000 description 1
JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
238000007599 discharging Methods 0.000 description 1
239000010433 feldspar Substances 0.000 description 1
239000012530 fluid Substances 0.000 description 1
239000010436 fluorite Substances 0.000 description 1
239000000295 fuel oil Substances 0.000 description 1
239000002828 fuel tank Substances 0.000 description 1
239000011521 glass Substances 0.000 description 1
239000010439 graphite Substances 0.000 description 1
229910002804 graphite Inorganic materials 0.000 description 1
239000010440 gypsum Substances 0.000 description 1
229910052602 gypsum Inorganic materials 0.000 description 1
239000001257 hydrogen Substances 0.000 description 1
229910052739 hydrogen Inorganic materials 0.000 description 1
150000004679 hydroxides Chemical class 0.000 description 1
239000012535 impurity Substances 0.000 description 1
238000011835 investigation Methods 0.000 description 1
239000007788 liquid Substances 0.000 description 1
230000004807 localization Effects 0.000 description 1
239000011777 magnesium Substances 0.000 description 1
229910052749 magnesium Inorganic materials 0.000 description 1
239000000463 material Substances 0.000 description 1
229910052751 metal Inorganic materials 0.000 description 1
239000002184 metal Substances 0.000 description 1
229910044991 metal oxide Inorganic materials 0.000 description 1
150000004706 metal oxides Chemical class 0.000 description 1
239000003345 natural gas Substances 0.000 description 1
TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
229910052670 petalite Inorganic materials 0.000 description 1
239000002006 petroleum coke Substances 0.000 description 1
239000001294 propane Substances 0.000 description 1
238000011084 recovery Methods 0.000 description 1
229910052814 silicon oxide Inorganic materials 0.000 description 1
239000002893 slag Substances 0.000 description 1
239000011734 sodium Substances 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
241000894007 species Species 0.000 description 1
239000004575 stone Substances 0.000 description 1
229920003002 synthetic resin Polymers 0.000 description 1
239000000057 synthetic resin Substances 0.000 description 1
CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
239000011882 ultra-fine particle Substances 0.000 description 1
229910052845 zircon Inorganic materials 0.000 description 1
GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/106—Preheating, burning calcining or cooling in fluidised bed furnaces
- 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
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/001—Calcining
- B01J6/004—Calcining using hot gas streams in which the material is moved
- 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
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Ceramic Engineering (AREA)
Thermal Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Materials Engineering (AREA)
Structural Engineering (AREA)
Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Treating Waste Gases (AREA)
Dental Preparations (AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

CA000399484A 1981-04-09 1982-03-26 Process and apparatus for fluidized calcination of diamide lime, and desulfurizing agent Expired CA1220323A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP56052382A JPS57170823A (en)	1981-04-09	1981-04-09	Fluidized roasting method and apparatus
JP52,382/81		1981-04-09

Publications (1)

Publication Number	Publication Date
CA1220323A true CA1220323A (en)	1987-04-14

Family

ID=12913247

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA000399484A Expired CA1220323A (en)	1981-04-09	1982-03-26	Process and apparatus for fluidized calcination of diamide lime, and desulfurizing agent

Country Status (4)

Country	Link
JP (1)	JPS57170823A (de)
CA (1)	CA1220323A (de)
DE (1)	DE3212210A1 (de)
NO (1)	NO164832C (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2693730B1 (fr) *	1992-07-16	1994-09-30	Bp Chemicals Snc	Réacteur à lit fluidisé et procédé de soutirage.
EP0579426B1 (de) *	1992-07-16	1998-03-18	BP Chemicals Limited	Polymerisationsverfahren
GB0413671D0 (en) *	2004-06-18	2004-07-21	Clyde Blowers Ltd	Conveying device
DE102008031293A1 (de) *	2008-07-02	2010-01-07	Alzchem Trostberg Gmbh	Verfahren zur Herstellung von Branntkalk
JP5120475B2 (ja) *	2011-03-28	2013-01-16	三菱マテリアル株式会社	生石灰の製造設備並びに消石灰の製造設備および製造方法
GB201304590D0 (en) *	2013-03-14	2013-05-01	Univ Aberdeen	Cement composition and method of producing the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2105733B2 (de) *	1971-02-08	1975-02-06	Sueddeutsche Kalkstickstoff-Werke Ag, 8223 Trostberg	Vorrichtung zur Entnahme eines fluidisierbaren Feststoffes aus einem Druckbehälter
JPS49130871A (de) *	1973-04-24	1974-12-14
SU474665A1 (ru) *	1973-06-13	1975-06-25	Государственный Всесоюзный Научно-Исследовательский Институт Строительных Материалов И Конструкций	Шахтна печь кип щего сло
JPS5129113A (en) *	1974-09-05	1976-03-12	Sony Corp	Eizoshingo no henchosochi
US3995987A (en) *	1975-03-31	1976-12-07	Macaskill Donald	Heat treatment of particulate materials
JPS5450414A (en) *	1977-09-30	1979-04-20	Ibiden Co Ltd	Hot iron desulfurizing agent and production thereof
JPS5486417A (en) *	1977-12-23	1979-07-10	Ibiden Co Ltd	Hot iron desulfurizing agent and production thereof
JPS55110712A (en) *	1979-02-15	1980-08-26	Kawasaki Steel Corp	Desulfurizing agent for blowing-in
JPS56158827A (en) *	1980-05-10	1981-12-07	Nippon Carbide Ind Co Ltd	Powdered composition for desulfurizing agent

1981
- 1981-04-09 JP JP56052382A patent/JPS57170823A/ja active Granted
1982
- 1982-03-26 CA CA000399484A patent/CA1220323A/en not_active Expired
- 1982-04-01 DE DE19823212210 patent/DE3212210A1/de active Granted
- 1982-04-07 NO NO821190A patent/NO164832C/no unknown

Also Published As

Publication number	Publication date
DE3212210A1 (de)	1982-11-04
NO164832C (no)	1990-11-21
DE3212210C2 (de)	1991-02-21
NO821190L (no)	1982-10-11
JPS57170823A (en)	1982-10-21
JPH0118014B2 (de)	1989-04-03
NO164832B (no)	1990-08-13

Legal Events

Date	Code	Title	Description
2004-04-14	MKEX	Expiry

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US5972066A (en)	1999-10-26	Mixed bed iron reduction process
US6056935A (en)	2000-05-02	Iron sulfide and process for producing the same
US3869538A (en)	1975-03-04	Process for producing sodium carbonate from trona
CA1244656A (en)	1988-11-15	Processes and appparatus for the smelting reduction of smeltable materials
KR19980701638A (ko)	1998-06-25	철광석 환원시 발생하는 분진을 이용하는 방법
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AU739185B2 (en)	2001-10-04	A process and apparatus for treating particulate matter
KR910008730B1 (ko)	1991-10-19	칼슘 화합물을 고상 및 개스상 화합물로 전환시키는 방법
CA1200102A (en)	1986-02-04	Process and apparatus for generating synthesis gas
CA1220323A (en)	1987-04-14	Process and apparatus for fluidized calcination of diamide lime, and desulfurizing agent
JPS6234684B2 (de)	1987-07-28
GB2174082A (en)	1986-10-29	A process for removing gaseous sulphur compounds, particularly sulphur dioxide, from the flue gases of a furnace
US2733137A (en)	1956-01-31	Apparatus for effecting fluidization
HU217281B (hu)	1999-12-28	Eljárás és berendezés szilárd szemcsés anyagnak egymáshoz tapadni képes szemcséket tartalmazó, forró gázzal való felhevítésére
CA1205636A (en)	1986-06-10	Method of converting iron ore into molten iron
US4014682A (en)	1977-03-29	Process for the production of elemental phosphorus and iron from phosphate rock
US4263262A (en)	1981-04-21	Fluid bed calcining process
GB2077296A (en)	1981-12-16	Powdery desulphurizer composition for molten iron
EA037686B1 (ru)	2021-05-04	Способ и устройство для обработки остатка от выщелачивания серосодержащего металлического концентрата
PL139256B1 (en)	1987-01-31	Method of and apparatus for manufacturing synthesis gas
US2694620A (en)	1954-11-16	Recovery of magnesia
US3773473A (en)	1973-11-20	Beneficiation and hot briquetting of phosphate ores by removing -400 mesh fines
US3495973A (en)	1970-02-17	Gas-solid reaction
US4304754A (en)	1981-12-08	Fluid bed calcining apparatus