GB796409A - Improvements in or relating to the control of coal-washing apparatus - Google Patents

Improvements in or relating to the control of coal-washing apparatus

Info

Publication number
GB796409A
GB796409A GB2701454A GB2701454A GB796409A GB 796409 A GB796409 A GB 796409A GB 2701454 A GB2701454 A GB 2701454A GB 2701454 A GB2701454 A GB 2701454A GB 796409 A GB796409 A GB 796409A
Authority
GB
United Kingdom
Prior art keywords
coal
air
governor
shale
valves
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
GB2701454A
Inventor
Walter May Wallace
James Donald Menzies
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.)
AUTOMATIC COAL CLEANING COMPAN
Original Assignee
AUTOMATIC COAL CLEANING COMPAN
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 AUTOMATIC COAL CLEANING COMPAN filed Critical AUTOMATIC COAL CLEANING COMPAN
Priority to GB2701454A priority Critical patent/GB796409A/en
Publication of GB796409A publication Critical patent/GB796409A/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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
    • B03B5/24—Constructional details of jigs, e.g. pulse control devices

Landscapes

  • Control Of Fluid Pressure (AREA)

Abstract

796,409. Washing coal. AUTOMATIC COAL CLEANING CO., Ltd. Dec. 28, 1955 [Sept. 17, 1954], No. 27014/54. Class 82(2) A system for controlling coal washboxes comprises a plurality of fluid-operated valves (3a &c.) for regulating the removal of discard from a coal washbox, a governor (4) responsive to the quantity of discard material in the washbox, and a pilot valve (2) for the automatic control of the fluid supply to the said 'regulating valves, the governor being operatively connected to the pilot valve so that the indications imparted by the governor to the pilot valve control the pressure of the fluid supply for operating the said regulating valves. In the Fig. shown, air under pressure is fed to pilot valve 2 from a supply 1; a governor 4 is connected, e.g. via a cam or diaphragm, to the valve 2 which may be of the kind described in Specification 722,993 [Group XXIX] and which controls the supply of air to the discard regulating valves 3a &c. situated in the discharge compartment and controlling the flow of air between such compartment and atmosphere. The wash-box itself may be operated via valve 7 by air from vent 1 or by a separate fluid supply, water being supplied at 8 and raw coal at 9. Pulsation of water in compartments 11 stratifies the coal &c., shale being discharged between gates 15, 16. Valves 3a &c. control the air outlet from discharge chamber 17 to atmosphere; closure of 3a &c. suppresses the pulsations of water between the said gates and stops shale discharge, whereas their opening permits both pulsation and discharge. Governor 4 responds to the thickness of shale layer 14, so actuating the pilot valve 2 and air supply to the valves 3a &c. as to open the latter and allow shale discharge when the layer 14 increases, and vice versa, so as to maintain a substantially constant shale layer. A recorder 6 of air supply pressure fluctuations may be calibrated in terms of tonnage of material extracted or any other faction of the degree of valve (3a &c.) opening.
GB2701454A 1954-09-17 1954-09-17 Improvements in or relating to the control of coal-washing apparatus Expired GB796409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2701454A GB796409A (en) 1954-09-17 1954-09-17 Improvements in or relating to the control of coal-washing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2701454A GB796409A (en) 1954-09-17 1954-09-17 Improvements in or relating to the control of coal-washing apparatus

Publications (1)

Publication Number Publication Date
GB796409A true GB796409A (en) 1958-06-11

Family

ID=10252780

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2701454A Expired GB796409A (en) 1954-09-17 1954-09-17 Improvements in or relating to the control of coal-washing apparatus

Country Status (1)

Country Link
GB (1) GB796409A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248702A (en) * 1977-01-15 1981-02-03 Norton-Harty Colliery Engineering Limited Stratifier discharge control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248702A (en) * 1977-01-15 1981-02-03 Norton-Harty Colliery Engineering Limited Stratifier discharge control

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