US3078050A US1291A US129160A US3078050A US 3078050 A US3078050 A US 3078050A US 1291 A US1291 A US 1291A US 129160 A US129160 A US 129160A US 3078050 A US3078050 A US 3078050A Authority US United States Prior art keywords mill sizes grinding friable range Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.

This is a simulation of SAG Mill using Rocky DEMComputational Fluid Dynamics://cfdninja.com/https://naviers.xyz/https://3dn.ninja/ANSYS

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SAG means for Semi-Autogenous Grinding, which means which it utilizes steel balls in addition to big rocks for grinding. The SAG mills make use of a minimal ball …. Chapter 9. Autogenous and Semi-Autogenous Mills. Grinding mills in which comminution takes place without grinding aids are known as Autogenous Grinding (AG) mills or Fully ...

USAAutogenous grinding millGoogle Patents. AUTOGENOUS GRINDING MILL Original Filed Oct. 9 1962 8 Sheets-Sheet 2 a E i i a FIG. 3 IN VENTOR5. Iii/7 i. Ml FJ IIJ d/V 11k g far/er Oct. 8 1968 A. R. MacPHERSON ETAL 3 404 846 . AUTOGENOUS GRINDING MILL 8 Sheets-Sheet 5 Original Filed Oct. 9. 1962 Oct. 8 1968 A. R. M PHERSON ETAL 3 404 345. Chat Online

ABSTRACT In autogenous grinding of mineral material in a grinding mill with a screening wall a method is provided for enabling the removal of at least three different fractions without the need of the screening wall being divided into sectors, thus increasing grinding material turnover and grinding capacity, namely by passing through openings (8) distributed over the screening wall (7) a mixed ...

An autogenous mill of ID 6.7. m and an effective grinding length of 2.1 m was fed with ore of SG 3.8 to 20% of its volume.. The mill was operated continuously 24 hours per day at 1200 t per day and 75% of the critical speed.The solids in the mill charge were at 80% solids. Estimate:1. The power consumption per tonne per day.

effective and intermittent autogenous mill_Patent US3404846 Autogenous grinding mill …Another purpose is a mill for autogenous ... and a very effective ... As the speed is increased toward critical speed there occurs an intermittent s

An attrition mill comprising a grinding chamber (1), an axial impeller (10), a chamber inlet (3) for admitting coarse particles and a separator comprising a chamber outlet (6) through which fine particles exit from the chamber. The mill is characterized in that a classification as between coarse and fine particles is performed in the mill upstream of the separator.

The material discharged from a primary autogenous grinding mill using this invention is well suited for final grinding in a secondary pebble mill, the grinding media of which can be taken, to advantage, from the primary grinding charge by means of pebble extraction described and illustrated in Swedish Patent Application No. 7909921-4.

Autogenous Grinding - Encyclopedia - The Free Dictionary In ore-pebble grinding, the ore pebble serves as the grinding medium. In dry autogenous grinding, air is blown continuously through the mill, thus removing the ...

We claim: 1. A grinding plant for autogeneous or semiautogeneous grinding of material in at least two separate grinding mills in a primary grinding step and a secondary grinding step which works with material obtained from the primary grinding step, the grinding chamber of the primary mill having a first and a second outlet means, the first outlet means including a group of openings for ...

Xinhai autogenous mill has high production efficiency.A wet autogenous mill that materials as grinding medium, feeding particle size 200-350mm. Inquire Now; Autogenous grinding mill WikiVisually. SAG is an acronym for Semi-Autogenous Grinding. SAG mills are essentially autogenous mills, but utilize grinding balls to aid in grinding like in a ...

deals specifically with surveying and sampling Autogenous Grinding (AG), Semi-Autogenous Grinding (SAG), rod, and ball mill circuits operating within the normal range of appli-cation. This guideline does not directly address analysis of crushing plants and fine grinding circuits, but it …

The invention claimed is: 1. A testing method for designing a semiautogenous or an autogenous grinding circuit having at least one ball mill for grinding ore, the method comprising: measuring an amount of time for grinding a predetermined mass of ore to a first predetermined size, in a first, semiautogenous step; calculating a required grinding energy based on the measured time for …

A method for grinding silicon carbide to a submicron powder which comprises grinding a silicon carbide feed material having an average particle size of between 1 and 200 microns in a liquid slurry in a contamination free high energy autogenous attrition mill in the presence of silicon carbide media for a sufficient time to obtain a specific surface area of at least 5 m 2 /g and preferably at ...

A patent has been applied for because this development is a complete game changer for mineral and metallurgical process pilot plant testing in the mining industry. Picture During Fabrication of SAG Mill (Chamber 488 mm (19.2 in) diameter by 163 mm (6.4 in) long ... accepting bids for undersized semi-autogenous grinding mills. The Patented Mini ...

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Abstract: A nut cold cutter devise is used in the assembly and maintenance of semi-autogenous grinding mills for large-scale mining. The device includes a front body, a back body and a hydraulic cylindrical chamber located between the front and back bodies. The front body has a defined cavity in which there is a movable cutting tool and a fixed cutting tool.

A nut cold cutter devise is used in the assembly and maintenance of semi-autogenous grinding mills for large-scale mining. The device includes a front body, a back body and a hydraulic cylindrical chamber located between the front and back bodies. The front body has a defined cavity in which there is a movable cutting tool and a fixed cutting tool.

Animation of the grinding action inside an AG Autogenous Grinding Mill. Like cloths tumble in a drying machine, rocks tumble on each other, larger ones grin...

There is a method of process control wet autogenous grinding materials in mill unit [1], including the amount of load and water flow for the optimization of the controlled parameter, the controlled parameter optimization to determine the specific RA is the speed of electrical energy for grinding the regulation of water flow depending on the ...

Autogenous grinding is at present carried out in tumbling mills of the same types as used in ball mill grinding. The similarities in equipment and procedure have led to the commonly held assumption that the grinding mechanisms are the same in the two processes, with the coarse part of the ore charge taking over the function of the ball charge.

describing grinding kinetics. All these approaches neglect the details of load movement and how energy is actually used inside the mill. For a long time, it has been commonplace to consider a basic process rule that semi-autogenous mills grind by impact, whereas ball mills do so by attrition. As a consequence, SAG mills have been

A method for reducing particle size of a particulate comprising feeding a feed material to a grinding mill having a power of at least 500 kW, the mill having a specific power draw of at least 50 kW per cubic meter of grinding volume of the mill and the grinding mill including a grinding media comprising particulate material having a specific gravity of not less than 2.4 tons/m3 and a particle ...

Fully-autogenous (FAG) and semi-autogenous (SAG) mills were first used on ores in the 1950s, but they were not seriously considered by the mining industry until the 1960s. By the 1970s, most designers of new plants considered AG/SAG grinding, even if it was not used in the final grinding circuit design. In the 1980s, many of the

It can, therefore, be concluded that autogenous grinding was not suitable with this particular gold ore, but semi-autogenous operation with about 8% ball charge was the preferred option. Based on these test results, a 6.7 m diameter × 2.1 m length SAG mill and a 3.3 m × 6.1 m ball mill were installed for commercial operation in closed circuit ...

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Semi-autogenous grinding uses a minimal ball charge in the range of 6-15% while autogenous grinding uses ore only. SAG and AG Mills operate by lifting ore/grinding media and dropping it on the operating bed of the mill charge. High impacts from lifting ore and media promote impact breakage which is the primary mechanism for size reduction in ...

Priority to US229334A priority Critical patent/US3206128A/en ... Autogenous grinding is defined as a system of grinding in which run of mine or coarsely crushed rock is fed directly to the mill which discharges a finished ground sand or slime product. This is to be contrasted with ball mills and pebble mills where sized steel balls ...

US3078049A - Mill and process for autogenous grinding of friable material - Google Patents Mill and process for autogenous grinding of friable material Download PDF Info Publication number ... Priority to US822612A priority Critical patent/US3078049A/en 1963-02 …