Modifications to the SABC comminution circuit included an increase in the SAG mill ball charge from 8% to 10% v/v; an increase in the mill ball charge from 23% v/v to 27% v/v; an increase in the maximum operating power draw in the ball mill to 5800 kW; the replacement of the HP Series pebble crusher with a TC84 crusher; and the addition of a ...

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the processing plant operates with a standard sabc comminution circuit ( figure 1 ), and was the first to use the largest domestic φ8.8 × 4.8 m sag mill ('diameter' represents nominal diameter, and 'length' of the mill represents the effective grinding length inside the end liners and discharge grates), φ6.2 × 9.5 m overflow ball mill and closed …

However, the total mill power consumption dropped 8% from an average of 7600 kW to 7000 kW. The mill work index dropped 10 percent from an average of 5.5 kW-hr/T to 5.0 kW-hr/T. Conclusions This represents a current view of the effects of grinding ball fragments in the milling circuit and the impact on the crushing and grinding circuit.

If the ore rock is highly fractured and/or brittle, it is likely that an AG mill be the most economical option in lieu of a SAG mill. AG milling can produce a finer grind than SAG milling for certain ores. Figure 2 summarizes the different comminution circuits and some relative factors compared to the other methods.

The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...

SAG Mill Grinding Circuit Design. AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the basis for a variety of circuit configurations. SAG circuits are common in the industry based on: High single-line capacities (leading to capital efficiency) The ability to mill a broad range of ore ...

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Hence from equation 7, to crush to the ball mill circuit feed size (x. 2) in open circuit requires specific energy equivalent to: f x f x 2. 1 W c ic. 1.19* 4 2 M x x. 1 (10) For closed circuit crushing the specific energy is: 1* 4 2. 1 2. 1. f x f x c ic W M x x (11) The difference between the two (eq 10 – eq 11) has to be provided by the ...

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CITIC HIC has received an order for SAG Mill Ø7.9m x 5.3m LG – 5,500kW SAG Mill Ø7.0m x 4.1m LG – 2,800kW Ball Mill Ø7.32m x 10.68m... 02 April 2010 SINO Iron Mill Arrive at Site

South America Complete Comminution circuit designed and supplied to Base Metals mine in South America, including Complete C140 Primary Crushing Station, Conveyors, Load-Out Station, 3MW SAG Mill, 3.8MW Ball Mill, Ball Loading Station & Scats Crushing Circuit.

With over a century of experience, Outotec designs and manufactures the most comprehensive line of grinding mills and entire grinding systems for mining companies around the world. The comprehensive offering provides reliable and energy efficient technology and solutions across wet, dry, horizontal, and vertical grinding operations.

Keywords: Process modelling, comminution, grinding, univariate analysis, expert control strategy. ï€ 1. INTRODUCTION In the last ten years, more than 20 semi autogenous (SAG) milling circuits were installed and used by Chinese mines, including copper, iron, gold, molybdenum and rare earth mines. For a better understanding of this kind of ...

The ball mill is the fine grinding machine connect the SAG or AG mill and flotation machine. Ball mills produce fine particles with a uniform size for flotation, its grinding medias commonly are steel ball. The ball mill rolls grinding media together with the ore, as the ore grinds, these balls initially 5-10 cm in diameter but gradually wear out.

The understanding and application of autogenous (AG) and semi-autogenous (SAG) mills at various mines in China have been developing rapidly. A review of the application status of AG and SAG mills in metal mining operations in China is summarized in this paper. The SABC comminution circuit adopted for the first stage of Wushan copper-molybdenum mine project …

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

AG/SAG SE values to enable the additional power required for AG/SAG milling to be determined. AG/SAG inef ciency varies according to the transfer size ﬁ (T80), whereby the ner sizes have less inefﬁ ciency than the ﬁ coarser sizes. This means a closed circuit single stage AG/ SAG mill can operate at a reasonable ef ciency if the ﬁ nal ﬁ

7. Product P80 of any intermediate HPGR circuit ahead of the tumbling mill stage(s) (µm) 8. Product P80 of the tumbling mill stage(s) (µm) •If there are multiple stages of grinding (e.g., SAG milling followed by ball milling), only the P80 of the product of the final milling stage is required. In addition to the above data, a ...

I try to size and select two ball mills, which the first is in open circuit with feed rate of 125 t/h and its discharge goes to the sump of hydrocyclone and together with discharge of second ball mill, enters to the cyclone for classification. the se... Last replied to by SmartDog. Simple answer: yes 125 x 2.5 = 312.5.

Ensuring efficient grinding operations. Our solution. ABB provided a fully integrated and optimized solution for the entire grinding circuit consisting of two 2.8MW twin drive systems, with possibility of increasing the power further to 10MW using twin or quad drive configurations. The two drive systems provided for Boddington included motors ...

【Ball Mill Working Principle】 High energy ball milling is a type of powder grinding mill used to grind ores and other materials to 25 mesh or extremely fine powders, mainly used in the mineral processing industry, both in open or closed circuits. Ball milling is a grinding method that reduces the product into a controlled final grind and a ...

Alibaba offers 313 sag mill products. About 24% of these are mine mill, 4% are grinding equipment, and 1% are flour mill. A wide variety of sag mill options are available to you, There are 313 sag mill suppliers, mainly located in Asia. The top supplying country or region is China, which supply of sag mill respectively.

Plant Concept SAG Circuit HPGR Circuit Equipment 1 x SAG Mill 9.8 MW 1 x Secondary Crusher 750 kW 1 x Pebble crusher 450 kW 1 x HPGR 4.0 MW 2 x Ball Mills 5.6 MW each 2 x Ball Mills 5.6 MW each Screens and conveyors 0.5 MW Screens and Conveyors 1.5 MW Total drive capacity installed 21.95 MW 17.45 MW

Therefore, a really energy efficient circuit may mean three stages of grinding instead of only two and each stage can be slightly smaller and more efficient than one big one e.g. a SAG mill (or HRC) followed by a ball mill and with a tertiary Vertimill. These options should at least be considered in the prefeasibility stage to see if the energy ...

Sino Grinding International (SGI) is a global company specializing in the design, manufacturing and distribution of grinding media. Our regional marketing offices offer regular on-site technical and logistical support. Our customers benefit from SGI's proactive product development and site-specific adjustments to meet their milling ...

in the SAG mill circuit if no crusher was present. The ball mill, the ﬁnal grind stage, is closed with a hydrocyclone classiﬁer that removes undersized material and sends it to the separation stage. At the beginning of 1980s, the De Xing copper mine was the ﬁrst to employ a SABC circuit in China.

single-stage mill is finished material suitable for flotation or leaching, usually in the size range of 80% passing 200 µm to 100 µm. The design of such circuits is complicated by the typical power-based models used for conceptual design being calibrated to a two-stage circuit with AG or SAG mill product being passed to a

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In order to select a suitable circuit for a magnetite ore plant in Hebei province, China, three different comminution circuits (i.e., jaw crusher + HPGR mill + ball mill, jaw crusher + ball mill, and SAG mill + ball mill) and their overall speciﬁc energies were compared based on simulations from JKSimMet and Morrell models.

SAG Mill Comminution (" SMC ") testwork results confirm the Baptiste material is medium-hard from a SAG milling perspective. Across all phases of the mine life, Axb values are tightly-clustered in ...

Blank spreadsheet that is pre-populated with the field names needed to import laboratory test results into the SAGMILLING circuit model testwork database (subscription required). Enter your test results, one per row, arranged into the columns indicated. To import into your testwork database, copy the block of cells starting with the top row ...

The proposed FECS includes 13 rules for SAG mill circuit. It is believed that these rules cover almost all "expected" scenarios observed during the SAG mill circuit operation. On the other hand, these rules actually embody the practical knowledge of plant human operators to control the SAG mill circuit under expected scenarios.

However the SAG route is more power-intensive and, for very hard ores, comes with some process risk in predicting performance. More recently, a hybrid solution has become available in the form of high pressure grinding rolls (HPGR's), which can replace the third stage of crushing and also the SAG mill.

A SAG mill can always be pushed further by adding steel and finer pre-crushing. But we have forgotten that SAG milling originally was introduced to eliminate multiple steps of size reduction and do the grinding in a single mill, to reduce capital and operating costs.

The vertical spiral stirring mill can be used for grinding and leaching at the same time. Suitable for the second stage grinding, sulphide ore fine grinding and tailings utilization, can be economically grinding ore to -400 mesh more than 90%-95% can be fine grinding ore, ore can be grinding to -10 micron or less.