GB1508825A - Method of producing low-carbon white husk ash - Google Patents

Method of producing low-carbon white husk ash

Info

Publication number
GB1508825A
GB1508825A GB1280275A GB1280275A GB1508825A GB 1508825 A GB1508825 A GB 1508825A GB 1280275 A GB1280275 A GB 1280275A GB 1280275 A GB1280275 A GB 1280275A GB 1508825 A GB1508825 A GB 1508825A
Authority
GB
United Kingdom
Prior art keywords
husks
temperature
heating
husk ash
crystallization
Prior art date
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
GB1280275A
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.)
REFRATECH ALBERT GmbH
Original Assignee
REFRATECH ALBERT GmbH
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.)
Filing date
Publication date
Priority claimed from DE19742416291 external-priority patent/DE2416291C3/en
Application filed by REFRATECH ALBERT GmbH filed Critical REFRATECH ALBERT GmbH
Publication of GB1508825A publication Critical patent/GB1508825A/en
Expired legal-status Critical Current

Links

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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/10—Burned or pyrolised refuse
    • C04B18/101—Burned rice husks or other burned vegetable material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
  • Paper (AREA)

Abstract

1508825 White husk ash REFRATECHNIK ALBERT GmbH 26 March 1975 [4 April 1974] 12802/75 Heading C1A White rice husk ash of low carbon content (< 2%) is prepared by heating husks to a separation temperature of 200-450‹C below the ignition point of the husks to remove volatile constituents, then heating the fixed carbon in the husks to a temperature of 450-700‹C, and then heat-treating the resulting husk-ash in a stream of oxidizing agent at 700‹-800‹C, greater than the crystallization temperature of the silica. In a preferred embodiment, the husks are brought to the separation temperature of 200-250‹C at a heating rate of 10-40‹C/min<SP>-1</SP>, starting at a feed temperature of below 100‹C, and are then heated at the same rate to an oxization temperature of 450-550‹C and the resultant husk ash is heat-treated at the same rate to 700-800‹C The preferred rate of heating is 25‹C/min<SP>-1</SP>. The reagent for the oxidizing step is preferably either combustion-supporting air of aircoefficient from 4À0-6À0, or water-vapour. A mineralizing agent such as alkali-metal halide, may be added to accelerate the separation of the fixed carbon in gaseous form, or to facilitate the crystallization of silica. The crystallization may be delayed in the oxidation step by the addition of HCl. The husks may be comminuted before heattreatment to increase the bulk weight.
GB1280275A 1974-04-04 1975-03-26 Method of producing low-carbon white husk ash Expired GB1508825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742416291 DE2416291C3 (en) 1974-04-04 Process for producing low carbon, white rice husk ash for the manufacture of building materials

Publications (1)

Publication Number Publication Date
GB1508825A true GB1508825A (en) 1978-04-26

Family

ID=5912086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1280275A Expired GB1508825A (en) 1974-04-04 1975-03-26 Method of producing low-carbon white husk ash

Country Status (8)

Country Link
JP (1) JPS5631286B2 (en)
EG (1) EG12053A (en)
FR (1) FR2266672B1 (en)
GB (1) GB1508825A (en)
IN (1) IN140319B (en)
IT (1) IT1034860B (en)
PH (1) PH12383A (en)
SE (1) SE394886B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1039898C (en) * 1995-03-28 1998-09-23 吴国华 Production process for extracting silicon dioxide
RU2579447C2 (en) * 2012-01-05 2016-04-10 Ухань Кайди Инджиниринг Текнолоджи Рисерч Инститьют Ко., Лтд. Complex method for application of biomass, containing amorphous silicon dioxide
WO2020005091A1 (en) 2018-06-28 2020-01-02 Нина Андреевна Чернявская Method for producing silicon dioxide
LT6778B (en) 2019-08-20 2020-11-10 Dss Crystal Ltd. Method for obtaining intact amorphous silica and high-purity silicon from plants and the device used in said method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR7605675A (en) * 1977-03-03 1977-08-23 Steinmueller Gmbh L & C PROCESS TO BURN RESIDUAL RICE SHELLS AND OTHER WASTE CONTAINING CELLULOSE
JPH0465313A (en) * 1990-06-30 1992-03-02 Naigai Koki Kk Heat resistant heat insulating material and production thereof
NZ549499A (en) * 2004-02-13 2010-07-30 Garry Robert Nunn Aqueous crystalline biogenic silica and applications using same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1039898C (en) * 1995-03-28 1998-09-23 吴国华 Production process for extracting silicon dioxide
RU2579447C2 (en) * 2012-01-05 2016-04-10 Ухань Кайди Инджиниринг Текнолоджи Рисерч Инститьют Ко., Лтд. Complex method for application of biomass, containing amorphous silicon dioxide
WO2020005091A1 (en) 2018-06-28 2020-01-02 Нина Андреевна Чернявская Method for producing silicon dioxide
LT6778B (en) 2019-08-20 2020-11-10 Dss Crystal Ltd. Method for obtaining intact amorphous silica and high-purity silicon from plants and the device used in said method

Also Published As

Publication number Publication date
SE7503649L (en) 1975-10-06
DE2416291B2 (en) 1976-03-04
PH12383A (en) 1979-01-29
FR2266672B1 (en) 1982-08-13
IN140319B (en) 1976-10-16
EG12053A (en) 1978-09-30
JPS5631286B2 (en) 1981-07-20
IT1034860B (en) 1979-10-10
JPS50140396A (en) 1975-11-11
FR2266672A1 (en) 1975-10-31
SE394886B (en) 1977-07-18
DE2416291A1 (en) 1975-10-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee