GB482931A - Improvements in flotation of fine refuse coal - Google Patents

Improvements in flotation of fine refuse coal

Info

Publication number
GB482931A
GB482931A GB22607/37A GB2260737A GB482931A GB 482931 A GB482931 A GB 482931A GB 22607/37 A GB22607/37 A GB 22607/37A GB 2260737 A GB2260737 A GB 2260737A GB 482931 A GB482931 A GB 482931A
Authority
GB
United Kingdom
Prior art keywords
flotation
coal
fine
hydrocarbon
frother
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
GB22607/37A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid 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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB482931A publication Critical patent/GB482931A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

Fine refuse coal, e.g. anthracite culm, is cleaned by first subjecting it to froth flotation with flotation reagents in amount insufficient to float the fine particles having a high ash content so that the concentrate obtained contains a major portion of the fine low ash coal, and then classifying the tailings from the flotation operation, e.g. by screening, rejecting the fine sizes, and floating the coarse sizes with an amount of reagent sufficient to float the coarse low ash coal. The first flotation is preferably carried out with a frother consisting of a mixture of paraffin alcohols having from 7-10 carbon atoms stabilized with a hydrocarbon, as described in Specification 446,418, and for the second flotation a hydrocarbon collector, e.g. kerosene, is added. One or both of the concentrates may be cleaned by re-floating and the concentrates may be kept separate or mixed. In an example, after flotation of the finest coal with the alcohol-hydrocarbon frother, the tailings are classified in the presence of sodium silicate, and the coarser coal floated with kerosene.
GB22607/37A 1936-09-01 1937-08-17 Improvements in flotation of fine refuse coal Expired GB482931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US98975A US2136341A (en) 1936-09-01 1936-09-01 Flotation of culm

Publications (1)

Publication Number Publication Date
GB482931A true GB482931A (en) 1938-04-07

Family

ID=22271796

Family Applications (2)

Application Number Title Priority Date Filing Date
GB22607/37A Expired GB482931A (en) 1936-09-01 1937-08-17 Improvements in flotation of fine refuse coal
GB22608/37A Expired GB493971A (en) 1936-09-01 1937-08-17 Improvements in flotation of fine refuse coal

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB22608/37A Expired GB493971A (en) 1936-09-01 1937-08-17 Improvements in flotation of fine refuse coal

Country Status (3)

Country Link
US (1) US2136341A (en)
FR (2) FR826121A (en)
GB (2) GB482931A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668617A (en) * 1949-10-06 1954-02-09 Attapulgus Minerals & Chemical Production of phosphate furnace feed
US2769540A (en) * 1952-11-08 1956-11-06 American Cyanamid Co Method of beneficiating sand

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849113A (en) * 1953-11-16 1958-08-26 Duval Sulphur And Potash Compa Methods of and means for handling flotation middlings in ore concentration processes
US2806598A (en) * 1954-06-15 1957-09-17 American Cyanamid Co Froth flotation process
US2967615A (en) * 1958-03-25 1961-01-10 American Agricultural Chem Co Concentration of phosphate mineral
US3137650A (en) * 1961-09-05 1964-06-16 Saskatchewan Potash Reflotation concentration of sylvite
US3770213A (en) * 1972-01-18 1973-11-06 Bethlehem Steel Corp Process for separating carbon from iron-bearing fines in blast furnace flue dusts
US4268379A (en) * 1977-12-23 1981-05-19 American Cyanamid Company Selective flocculation for increased coal recovery by froth flotation
CN102784714A (en) * 2012-08-23 2012-11-21 永城煤电控股集团有限公司 Treatment process of coal slime washing tailings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668617A (en) * 1949-10-06 1954-02-09 Attapulgus Minerals & Chemical Production of phosphate furnace feed
US2769540A (en) * 1952-11-08 1956-11-06 American Cyanamid Co Method of beneficiating sand

Also Published As

Publication number Publication date
FR826120A (en) 1938-03-23
GB493971A (en) 1938-10-18
US2136341A (en) 1938-11-08
FR826121A (en) 1938-03-23

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