grinding mill ball patent
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grinding mill ball patent

US5383615A - Ball milling apparatus - Google Patents

A ball mill for use in mechanical alloying and grinding comprising a plurality of ferromagnetic balls within a spherical or cylindrical chamber or cell of a paramagnetic material. The chamber has a substantially horizontal axis of rotation. At least one magnet is mounted outside the chamber to produce a magnetic field within the chamber.

US687519A - Tubular ball-mill. - Google Patents

The object of the present invention is a tubular ball-mill of the described class, in which the grinding may be effected in less time than heretofore and in which themill may be used for grinding softer material than customary-such as, for instance, coaleven if this material be fed into the mill

US4966331A - Stirred ball mill for grinding pigments ...

US4966331A US07/325,114 US32511489A US4966331A US 4966331 A US4966331 A US 4966331A US 32511489 A US32511489 A US 32511489A US 4966331 A US4966331 A US 4966331A Authority US United States Prior art keywords stirrer grinding container webs balls Prior art date 1986-12-11 Legal status (The legal status is an assumption and is not a legal conclusion.

WO2009077940A1 - A method of grinding a ... - Google Patents

A method of grinding a mineral-containing ore, which includes grinding the mineral-containing ore in a primary milling process and thereafter fine grinding the mineral-containing ore in a secondary ball-mill. A composite grinding medium comprising a mixture of steel balls and pebbles is used in the secondary ball-mill. The pebbles have an average size which is relatively smaller than the ...

US7744027B2 - Planetary ball mill - Google Patents

A planetary ball mill includes: a revolution turning arm turned about a revolution shaft rotated by a driving force; mill pots each supported on the revolution turning arm so as to be rotated about a rotation shaft inclined from the vertical direction toward the side of the revolution shaft; and an outer circumferential pot receiver which is disposed fixedly on the upper side of the revolution ...

US1630992A - Air-swept ball mill - Google Patents

US1630992A US752133A US75213324A US1630992A US 1630992 A US1630992 A US 1630992A US 752133 A US752133 A US 752133A US 75213324 A US75213324 A US 75213324A US 1630992 A US1630992 A US 1630992A Authority US United States Prior art keywords air drum pipe collector dust Prior art date 1924-11-25 Legal status (The legal status is an assumption and is not a legal conclusion.

Ball mill - Starkey Associates Grinding Design and ...

The present invention relates to a SAG mill, and especially to a SAG mill for the milling or grinding of samples of ore on a scale that is suitable for use in design of a commercial scale SAG mill for the grinding of ore. An embodiment of the SAG mill is illustrated in the drawings. FIG. 1 shows a ball mill, generally indicated by 10.

US3180581A - Ball mill discharge trommel - Google Patents

US3180581A US210975A US21097562A US3180581A US 3180581 A US3180581 A US 3180581A US 210975 A US210975 A US 210975A US 21097562 A US21097562 A US 21097562A US 3180581 A US3180581 A US 3180581A Authority US United States Prior art keywords trommel discharge annulus mill opening Prior art date 1962-07-19 Legal status (The legal status is an assumption and is not a

CONTROL SYSTEM AND METHOD FOR A REVERSED BALL MILL ...

United States Patent 3783252 . Abstract: The dynamically fast in response and stable control arrangement for a reversed ball mill grinding circuit, which operates in accordance with the basic control algorithm that the new material feed rate to the reversed ball mill grinding circuit is controlled as a function of the net output solids flow ...

Axially reciprocating tubular ball mill grinding device ...

Feb 01, 2002  A ball mill, comprising: a sample holder comprised of a plurality of vessels, each vessel having a tubular configuration and a longitudinal axis about which an interior for performing ball grinding is defined; and means for reciprocating a drive rod coupled to the sample holder in a substantially frictionless manner and in a direction ...

Patents Assigned to Netzsch-Feinmahltechnik GmbH - Justia ...

Feb 02, 2018  Abstract: The invention relates to an agitator ball mill, with a grinding container, the inner side of which is made of a ceramic material, a rotor arranged inside the grinding container with a grinding gap formed between the surface of rotor and the inner side of the grinding container, a plurality of cams, fitted to the inner side of the grinding container and extend radially inwards.

LINER FOR GRINDING MILLS - NORMAN T,US

Both ball mills and rod mills have been used for grinding ores or the like, such a mill normally being a rotating cylinder containing a number of balls or rods formed of steel, usually special alloy steels, which crush and comminute the ore between them or against the side of the mill, or perhaps the end thereof.

(PDF) Grinding in Ball Mills: Modeling and Process Control

According to [26], when grinding in a ball mill, the reduction in size occurs according to three mechanisms of fragmentation: abrasion, splitting, and destruction ( Figure 3). In comparison with ...

EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL

EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE Niyoshaka Nistlaba Stanley Lameck A dissertation submitted to the Faculty of Engineering and The Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for

Performance enhancement tools for grinding mills

PERFORMANCE ENHANCMENT TOOLS FOR GRINDING MILLS 103 The need for new instruments ... SAG and ball mills have grown in size and there are now ... *Impactmeter patent pending in Australia, Canada, Chile, South Africa and USA. 104 PLATINUM ADDING VALUE Figure 1. Effect of mill speed and lifter profile on load trajectors

GRINDING MILLS - DOMINION ENG WORKS LTD,CA

What I claim as new and desire to secure by Letters Patent of the United States is 1. A grinding mill for reducing friable material to a pulp condition, having a rotatable shell, at least one material reducing zone therein, loading means at one end of the shell to supply said material to said zone, intermediate partition means within the shell spaced axially from the shell other end to form an ...

Methods of operating ball grinding mills - W. R. Grace Co.

This invention relates to electrical motor driven drum type ball grinding mills and more particularly it relates to methods of monitoring and operating such mills to improve throughput efficiencies. BACKGROUND ART. The monitoring of a ball grinding mill or equivalent through electrical signals derived from the mill in operation has long been known.

Ball mill - Wikipedia

A ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paints.Ball mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. Different materials are used as media, including ceramic balls, flint pebbles, and stainless steel balls.

Grinding Mills - an overview ScienceDirect Topics

The circuit comprises a SAG mill, 12 m diameter by 6.1 m length (belly inside liners, the effective grinding volume), two pebble crushers, and two ball mills in parallel closed with cyclones. The SAG mill is fitted with a 20 MW gearless drive motor with bi-directional rotational capacity.

Ball mill - Starkey Associates Grinding Design and ...

The present invention relates to a SAG mill, and especially to a SAG mill for the milling or grinding of samples of ore on a scale that is suitable for use in design of a commercial scale SAG mill for the grinding of ore. An embodiment of the SAG mill is illustrated in the drawings. FIG. 1 shows a ball mill, generally indicated by 10.

CONTROL SYSTEM AND METHOD FOR A REVERSED BALL MILL ...

United States Patent 3783252 . Abstract: The dynamically fast in response and stable control arrangement for a reversed ball mill grinding circuit, which operates in accordance with the basic control algorithm that the new material feed rate to the reversed ball mill grinding circuit is controlled as a function of the net output solids flow ...

Ball mill - RILEY STOKER CORP

Means and methods of supplying heat to grinding mills: 1963-02-19: 3032280: Ball mill with material separators at each end for recycling oversize material: 1962-05-01: 2316875: Pulverizing mill control system: 1943-04-20: 2285429: Pulverization: 1942-06-09: 2256841: Grinding mill: 1941-09-23: 2174630: Classification system for pulverized ...

Axially reciprocating tubular ball mill grinding device ...

Feb 01, 2002  A ball mill, comprising: a sample holder comprised of a plurality of vessels, each vessel having a tubular configuration and a longitudinal axis about which an interior for performing ball grinding is defined; and means for reciprocating a drive rod coupled to the sample holder in a substantially frictionless manner and in a direction ...

Methods of operating ball grinding mills - W. R. Grace Co.

This invention relates to electrical motor driven drum type ball grinding mills and more particularly it relates to methods of monitoring and operating such mills to improve throughput efficiencies. BACKGROUND ART. The monitoring of a ball grinding mill or equivalent through electrical signals derived from the mill in operation has long been known.

GRINDING MILLS - DOMINION ENG WORKS LTD,CA

What I claim as new and desire to secure by Letters Patent of the United States is 1. A grinding mill for reducing friable material to a pulp condition, having a rotatable shell, at least one material reducing zone therein, loading means at one end of the shell to supply said material to said zone, intermediate partition means within the shell spaced axially from the shell other end to form an ...

LINER FOR GRINDING MILLS - NORMAN T,US

Both ball mills and rod mills have been used for grinding ores or the like, such a mill normally being a rotating cylinder containing a number of balls or rods formed of steel, usually special alloy steels, which crush and comminute the ore between them or against the side of the mill, or perhaps the end thereof.

Ball mill - Wikipedia

A ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paints.Ball mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. Different materials are used as media, including ceramic balls, flint pebbles, and stainless steel balls.

EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL

EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE Niyoshaka Nistlaba Stanley Lameck A dissertation submitted to the Faculty of Engineering and The Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for

Performance enhancement tools for grinding mills

PERFORMANCE ENHANCMENT TOOLS FOR GRINDING MILLS 103 The need for new instruments ... SAG and ball mills have grown in size and there are now ... *Impactmeter patent pending in Australia, Canada, Chile, South Africa and USA. 104 PLATINUM ADDING VALUE Figure 1. Effect of mill speed and lifter profile on load trajectors

Grinding Mills - Common Types

Nov 07, 2016  In Fig. 1.3 is shown a large ball mill, designed for the dry grinding of limestone, dolomite, quartz, refractory and similar materials; this type of mill being made in a series of sizes having diameters ranging from about 26 in. to 108 in., with the corresponding lengths

Cement grinding ball mill problem - Grinding ...

Why cement grinding ball mill is floating towards the Gear box (MAAG) which has resulted the damage of the second stage of gear box. As we have replaced the gear box now but still we are unable to find out the solution how to control the mill which is continue its floating towards gear box. Any sugg

Optimization of the make-up ball charge in a grinding mill

The combination of a grinding circuit simulator with a model of ball wear in a grinding mill leads to a method to calculate, with a preselected accuracy, the make-up ball charge that optimizes the ...

Mill (grinding) - Wikipedia

Ball mill. A typical type of fine grinder is the ball mill.A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal, which grind material to the necessary fineness by friction and impact with the tumbling balls. Ball mills normally operate with an approximate ball charge of 30%.

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