GB1104473A - Control of grinding - Google Patents

Control of grinding

Info

Publication number
GB1104473A
GB1104473A GB16202/65A GB1620265A GB1104473A GB 1104473 A GB1104473 A GB 1104473A GB 16202/65 A GB16202/65 A GB 16202/65A GB 1620265 A GB1620265 A GB 1620265A GB 1104473 A GB1104473 A GB 1104473A
Authority
GB
United Kingdom
Prior art keywords
control
load
mill
signals
predetermined
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
GB16202/65A
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.)
DAVY ASHMORE BAHAMAS Ltd
Original Assignee
DAVY ASHMORE BAHAMAS Ltd
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 DAVY ASHMORE BAHAMAS Ltd filed Critical DAVY ASHMORE BAHAMAS Ltd
Publication of GB1104473A publication Critical patent/GB1104473A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/1805—Monitoring devices for tumbling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0605—Control of flow characterised by the use of electric means specially adapted for solid materials
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)

Abstract

A grinding process, e.g. for cement, is automatically controlled in dependence on a combination of measured variables of the process and the control is overridden by further automatic control if one of the variables varies beyond a predetermined limit. As described, motor-driven feeders respectively supply clinker and gypsum to a two-compartment grinding mill and oversize particles in the output are separated and returned to the input. A microphone is associated with each compartment to derive signals, which are suitably filtered, representative of load, and wattmeters are respectively associated with motors driving the separator and an elevator for mill output to derive further signals representative of load. Adjustable portions of these four signals are added and any deviation of their sum from an adjustable reference is effective through a transistor amplifier to control the speeds of the motors driving the clinker and gypsum feeders so that mill load is maintained between predetermined limits. The transistor amplifier is associated with biassed diode limiters and has differential feedback to introduce an integral component of control. If the control signal remains below a predetermined value for a predetermined period an alarm is operated to indicate a deficiency in the feed to the mill. Each of the four signals is also prevented from exceeding a predetermined limit by application to separate transistor circuits which can override the main control system by reducing its reference value. Different combinations of load detectors and the use of temperature variable resistors as load detectors are referred to.
GB16202/65A 1964-04-15 1965-04-15 Control of grinding Expired GB1104473A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US360022A US3314614A (en) 1964-04-15 1964-04-15 Analog computer grinding control

Publications (1)

Publication Number Publication Date
GB1104473A true GB1104473A (en) 1968-02-28

Family

ID=23416273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16202/65A Expired GB1104473A (en) 1964-04-15 1965-04-15 Control of grinding

Country Status (2)

Country Link
US (1) US3314614A (en)
GB (1) GB1104473A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2741510A1 (en) * 1977-09-15 1979-03-22 Bbc Brown Boveri & Cie PROCEDURE AND REGULATORY ARRANGEMENT FOR THE FLOW CONTROL OF A SAFE CIRCULATING MAIN SYSTEM
GB2176422A (en) * 1985-05-14 1986-12-31 Anglo Amer Corp South Africa Grinding mill control

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281818B (en) * 1965-07-17 1968-10-31 Rheinische Kalksteinwerke Process for the simultaneous grinding of several raw materials with different grindability
US3369761A (en) * 1966-01-19 1968-02-20 John W. Hand Grinding mill and fineness control system
US3421703A (en) * 1968-04-04 1969-01-14 Nat Gypsum Co Kiln feed control
NL7014936A (en) * 1970-10-12 1972-04-14 Koninklijke Hoogovens En Staal
US3786844A (en) * 1971-08-12 1974-01-22 Procter & Gamble Filling containers with friable particles
US3860804A (en) * 1972-04-21 1975-01-14 Westinghouse Electric Corp Control system and method for ball mill and spiral classifier in closed circuit
CA1065825A (en) * 1976-01-19 1979-11-06 Walter A. Dutton Method and system for maintaining optimum throughput in a grinding circuit
AT367657B (en) * 1978-08-24 1982-07-26 Buehler Ag Geb AGITATOR BALL MILL CONTROL
JPS58159855A (en) * 1981-05-27 1983-09-22 三協電業株式会社 Method of controlling pulverization
FR2525922B1 (en) * 1982-05-03 1985-10-11 Stein Industrie METHOD AND DEVICE FOR ADJUSTING THE OPERATION OF A GRINDING APPARATUS
US4471916A (en) * 1982-08-30 1984-09-18 Chemfix Technologies, Inc. Apparatus for treating liquid and semi-solid organic waste materials
US4509696A (en) * 1982-08-30 1985-04-09 Chemfix Technologies, Inc. Method for treating liquid and semi-solid organic waste materials
JPS59216643A (en) * 1983-05-23 1984-12-06 太平洋セメント株式会社 Operation control of crusher
US5040734A (en) * 1987-09-22 1991-08-20 The British Petroleum Company P.L.C. Method for determining physical properties
US5226604A (en) * 1989-04-07 1993-07-13 Salzgitter Maschinenbau Gmbh Method of and apparatus for adjusting comminuting machines
DK167655B1 (en) * 1991-11-01 1993-12-06 Smidth & Co As F L PROCEDURE FOR MANAGING THE MATERIAL FEEDING FOR A ROLLING PRESSURE FOR MOLDING PARTICULATED MATERIAL
CN111482262B (en) * 2020-04-15 2021-09-28 天能电池(芜湖)有限公司 Control mode for improving stability of lead powder ball milling
US20220088608A1 (en) * 2020-09-22 2022-03-24 Divergent Technologies, Inc. Methods and apparatuses for ball milling to produce powder for additive manufacturing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073835B (en) * 1951-11-30 1960-01-21 Toronto Ontario David Weston (Kanada) Process for regulating the degree of filling of drum mills
US2833482A (en) * 1957-03-26 1958-05-06 Weston David Automatic control for wet grinding mills
US3094289A (en) * 1959-10-29 1963-06-18 Bolidens Gruv Ab Rock grinding system
US3145935A (en) * 1961-12-28 1964-08-25 United States Steel Corp Method and apparatus for controlling a grinding mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2741510A1 (en) * 1977-09-15 1979-03-22 Bbc Brown Boveri & Cie PROCEDURE AND REGULATORY ARRANGEMENT FOR THE FLOW CONTROL OF A SAFE CIRCULATING MAIN SYSTEM
GB2176422A (en) * 1985-05-14 1986-12-31 Anglo Amer Corp South Africa Grinding mill control
GB2176422B (en) * 1985-05-14 1990-01-24 Anglo Amer Corp South Africa Grinding mill control

Also Published As

Publication number Publication date
US3314614A (en) 1967-04-18

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