GB1153388A - Improved Method of Making Light-Weight Aggregate from Fly Ash. - Google Patents

Improved Method of Making Light-Weight Aggregate from Fly Ash.

Info

Publication number
GB1153388A
GB1153388A GB2087867A GB2087867A GB1153388A GB 1153388 A GB1153388 A GB 1153388A GB 2087867 A GB2087867 A GB 2087867A GB 2087867 A GB2087867 A GB 2087867A GB 1153388 A GB1153388 A GB 1153388A
Authority
GB
United Kingdom
Prior art keywords
pellets
carbon
charge
ashes
water
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
GB2087867A
Inventor
Thomas Eugene Ban
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.)
Mcdowell Wellman Engineering Co
Original Assignee
Mcdowell Wellman Engineering Co
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
Application filed by Mcdowell Wellman Engineering Co filed Critical Mcdowell Wellman Engineering Co
Priority to GB2087867A priority Critical patent/GB1153388A/en
Publication of GB1153388A publication Critical patent/GB1153388A/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
    • C04B18/08—Flue dust, i.e. fly ash
    • C04B18/085—Pelletizing
    • 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

Abstract

1,153,388. Aggregate for concrete. Mc- DOWELL-WELLMAN ENG. CO. 4 May, 1967, No. 20878/67. Heading C1H. Lightweight aggregate for concrete is made by (a) providing a charge of fly ash containing by weight from 5-10% of free carbon and at least 2% of iron, calculated as the metal; (b) forming the charge into discrete green pellets; (c) passing gas at 550-900‹ C. through a bed of the green pellets to dry them; (d) firing the dried pellets at 1800-2400‹ F. to initiate reaction of the carbon in the pellets; (e) cooling the indurated product; (f) crushing the cooled product; and (g) refiring at 1000-2000‹ F., at least a portion of the crushed product. The composition of the fly ash charge may be adjusted prior to pelletization by removing magnetic iron oxide, by adding iron oxide as mill scale, by adding carbon-poor ashes, slate or shale to ashes containing more than 10% of free carbon, by adding free carbon as powdered coal or graphite to ashes containing less than 5% of free carbon or by separation, e.g. flotation or classification to enrich carbon-poor ashes. Borax, sodium silicate, fluorspar, lime, montmorillonite clay, and silica may also be added. The charge is mixed into a granular mass with water in a pug-mill and then balled, in a rotating drum or an inclined pan, with further water. The pelletized charge is spread as a 5-10 inch layer on a Dwight-Lloyd travelling grate and dried with exhaust gas from the subsequent firing stage. The grate moves the dried pellets under gas torches (heating at 1800- 2200‹ F. forms discrete pellets whereas heating at 2200-2400‹ F forms clinker) to ignite the pellets which then move into a draught of air in which the material is bloated as the carbon reacts with air and with metallic oxides to evolve gases. The material which is refired to oxidize the reduced iron and thereby to prevent staining of the pellets on weathering comprises (1) the whole crushed product after nodulizing with water, (2) only the coarser crushings, or (3) the fines nodulized with water and reblended with the coarser crushings.
GB2087867A 1967-05-04 1967-05-04 Improved Method of Making Light-Weight Aggregate from Fly Ash. Expired GB1153388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2087867A GB1153388A (en) 1967-05-04 1967-05-04 Improved Method of Making Light-Weight Aggregate from Fly Ash.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2087867A GB1153388A (en) 1967-05-04 1967-05-04 Improved Method of Making Light-Weight Aggregate from Fly Ash.

Publications (1)

Publication Number Publication Date
GB1153388A true GB1153388A (en) 1969-05-29

Family

ID=10153271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2087867A Expired GB1153388A (en) 1967-05-04 1967-05-04 Improved Method of Making Light-Weight Aggregate from Fly Ash.

Country Status (1)

Country Link
GB (1) GB1153388A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317676A (en) 1978-11-22 1982-03-02 Nippon Steel Corporation Process for producing sintered iron ore having high reducibility
US4764218A (en) * 1985-07-09 1988-08-16 Ube Industries, Ltd. Process for the preparation of micro inorganic foamed granules
US5521132A (en) * 1994-09-01 1996-05-28 The United States Of America As Represented By The Secretary Of The Navy Ash-based ceramic materials
US5779789A (en) * 1995-12-18 1998-07-14 Aisin Takaoka Co., Ltd. Soil conditioner
CZ299539B6 (en) * 2005-04-06 2008-08-27 Ústav struktury a mechaniky hornin AV CR, v.v.i. Binder-filler mixture for producing solid, water stable and non-inflammable building materials and products
CN107029633A (en) * 2017-05-03 2017-08-11 江苏天楹环保能源成套设备有限公司 Flying dust plasma fusion mixed-forming preprocessing system and its handling process

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317676A (en) 1978-11-22 1982-03-02 Nippon Steel Corporation Process for producing sintered iron ore having high reducibility
US4764218A (en) * 1985-07-09 1988-08-16 Ube Industries, Ltd. Process for the preparation of micro inorganic foamed granules
US5521132A (en) * 1994-09-01 1996-05-28 The United States Of America As Represented By The Secretary Of The Navy Ash-based ceramic materials
US5779789A (en) * 1995-12-18 1998-07-14 Aisin Takaoka Co., Ltd. Soil conditioner
US5843857A (en) * 1995-12-18 1998-12-01 Aisin Takaoka Co., Ltd. Inorganic porous body and method for producing the same
CZ299539B6 (en) * 2005-04-06 2008-08-27 Ústav struktury a mechaniky hornin AV CR, v.v.i. Binder-filler mixture for producing solid, water stable and non-inflammable building materials and products
CN107029633A (en) * 2017-05-03 2017-08-11 江苏天楹环保能源成套设备有限公司 Flying dust plasma fusion mixed-forming preprocessing system and its handling process

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414E Application relinquished (sect. 14/1949)
49R Reference inserted (sect. 9/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed