Hpgr Vs Sag Mill

HIGH PRESSURE GRINDING ROLLS—A PROMISING AND COST ...

HPGR is never more than 2.5–3.5 kW·h/t even in grinding the hardest ores. Nevertheless advantages and shortcomings of HPGR should be compared with SAG mills in each individual case. Energy consumed in medium crushing, HPGR grinding and ball milling can be 40% lower as against SAG milling, which allows reduction of cost by more than USD 1 per ...

How energy efficient is HPGR? - ceecthefuture

advantages over SAG mills: • 2.4 kWh/t vas 12.0 kWh/t • Greater flexibility • Lower unit cost. Of course, the installed power for HPGR/Ball mill circuits vs SAG/Ball Mill circuits are generally beneficial but nothing like as advantageous as this, however the above number offers a big incentive to plant designers.

(PDF) THE CADIA HPGR-SAG CIRCUIT – FROM DESIGN TO ...

In normal operation the SAG Mill is fed with predominantly HPGR product and 10% to 15%. fresh feed fro m the primary feed bin (actuall y a combination of RoM ore …

Hpgr Vs High Pressure Roller Mill-HN Mining Machinery ...

high pressure grinding rolls versus sag mills. The effect of using conventional and high pressure grinding rolls (HPGR) crushing on the ball mill grinding of an iron ore was assessed to determine how these different comminution processes. ball mill versus roll mill proves-projekt.de. difference between ball mill and roller mill Shewa Heavy .

COMPARISON OF HPGR - BALL MILL AND HPGR - STIRRED MILL ...

Since the improvement of roll wear protection allowed HPGR to treat hard and abrasive materials, high pressure grinding rolls (HPGR) have become more attractive. There are a number of projects that are now using HPGRs in the comminution circuit instead of conventional AG or SAG mills.

What's the Difference Between SAG Mill and Ball Mill ...

SAG mill vs Ball mill Crushing ratio. 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 …

Hpgr Vs High Pressure Roller Mill - HN mining equipment ...

Hpgr Vs High Pressure Roller Mill. News Introduction：The HPGR (high pressure grinding rolls/rollers) is the core equipment of the high pressure grinding process.The machine reduces particles by compressing and crushing the feed between two counter rotating, parallel rollers with a small gap between them.

HPGR vs SAG - Grinding & Classification Circuits ...

Cerro Verde actual data shows that the HPGR circuit energy consumption was 3 kWh/t less than the SAG/Ball mill circuit that was considered in the trade off studies. The initial trade off studies were expecting to have 4.2 kWH/t of less energy consumption. (unknown) 6 years ago Like These time the favorite horse is SAG.

HPGR vs. SAG mill TetraTech comparison ... will the CUU FS ...

Application of High Pressure Grinding Rolls in the Mining Industry by Jake Alexander, MBA The application of High Pressure Grinding Rolls (HPGR) in the mining industry, especially as a replacement for the conventional Semiautogenous (SAG) milling process, is receiving a great deal of interest with several of our mining clients considering the use of this process to reduce …

RAPID RAMP-UP OF THE TROPICANA HPGR CIRCUIT

HPGR - 3.0 SAG Mill 11.4 - Recycle Crusher 0.4 - Ball Mill 14.0 15.1 Auxiliary Equipment* 3.7 4.1 Total 29.9 23.4 *Conveyors, screens, lube packs etc. The power utilisation comparison showed the SABC option has f SAG. 1 values of 1.3-1.4, highlighting the low power efficiency for this circuit. This ...

hpgr vs sag millhematite and magnetite processing

various models ball mills for magnetite iron ore. pdf Processing Of Magnetite Iron Ores–comparing. ... suitable circuit for a magnetite ore plant in hebei province china three different comminution circuits ie 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 …

How HPGR compares to conventional milling

HPGR wear vs conventional mills. Ball, SAG and rod mills all require their grinding media to be regularly replaced, unlike a HPGR. High Pressure Grinding Rolls have lower maintenance overheads than ball and rod mills, primarily because the grinding media in conventional mills needs to be replaced on a more regular basis.

Comparison of HPGR - ball mill and HPGR - stirred mill ...

Abstract. In the past 20 years, the energy-efficient comminution technologies, including high pressure grinding rolls (HPGR) and high speed stirred mill, have been developed and adopted in the hard-rock mining operation in order to reduce the energy consumption and improve the process performance.

HPGR or SAG? - SAGMILLING

HPGR or SAG? Choosing an appropriate grinding configuration is important for conceptual design. Here are some things to consider when making the choice between an HPGR-ball mill circuit and a SAG-ball mill circuit. Work index ratios. Having a hard ore is not a valid reason for choosing an HPGR circuit, the ore must be hard in a certain way.

high pressure grinding rolls versus sag mills

high pressure grinding rolls versus sag mills. High Pressure Grinding Rolls HPGR in Comparision to SAG . SAG mill operation is the advent of the hydrostatic bearing with a supply of high pressure oil pumped Off on SAG Mill Grinding Circuit Design Journal Bearings and Their Lubriion Discussion of these calculations in greater detail the weight or load supported by the …

HPGR and Iron Ore Processing - SlideShare

j environmental processing design & verification product innovation project management operations training skills hire hpgr vs. sag mill design 1. Original circuit design SAG/AG mills and ball mills (Huckleberry SABC circuit), however very energy intensive and also energy inefficient accounting for ~80% of the overall process plant energy (depending on the …

HPGR High Pressure Grinding Rolls |

Where HPGR technology has replaced traditional methods of crushing and grinding such as SAG or ball mills, customers have seen energy savings of up to 40%, and substantially improved mineral liberation. Find out more about the Enduron HPGR:

Outotec on HPGR's leading edge - Outotec

HPGR technology provides the greatest benefits for hard and very hard ores, for ores which are softer, AG or SAG milling can be the more economical solution due to the simplicity of the circuit, not requiring secondary crushing, screening and material handling to these individual processing steps.

HPGR High Pressure Grinding Rolls

As an energy-saving alternative to the SAG mill, HPGR is particularly suited for the pregrinding of hard, highly siliceous gold ores. This will help to downsize the ball mill while maintaining the throughput. In the pregrinding mode, HPGR use may result in energy savings of 15 to 30% and throughput increases of 20 to 40% (Schonert, 1991).

hpgr vs sag mill - vanderkleijafbouw.nl

difference between sag mill and ball mill Solution for . The operating cost difference between the two circuits is driven by the difference in ball mill steel wear between the SAG/ball mill circuit and the crushing/HPGR/ball FL FL breaks world record in Chile. Before the Esperanza order, FL's largest SAG mill measured 38' and its ball mills, 26'.

How HPGRs compare to conventional milling

Predicting SAG/AG Mill and HPGR Specific Energy Requirements Using the SMC Rock Characterisation Test S.Morrell SMCC Pty Ltd E-mail: steve@smccx Abstract. The SMC Test is described together with the sample requirements necessary to carry it out. The test is able to use very small sample quantities making it ideal for use with drill core.

High Pressure Grinding Rolls (HPGR)

HPGR vs. SAG Advantages • Significant energy cost savings • Reduced grinding media consumption • Reduced overall operating costs ... 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 ...

Model:Bond HPGR and ball mill - SAGMILLING

Simulating HPGR has two differences from a classical SSBM circuit with cone crushers: first is that the crusher product tends to be finer (~4 mm versus 9 mm) and the nature of the product is different. To simulate an HPGR and ball mill circuit, choose the HPGR - BM flowsheet and the Bond/Rowland single stage ball mill model.

Energy and Cost Comparisons of HPGR-based Circuits | E & MJ

For grinding to a P80 of 160 μm, the HPGR-ball mill circuit required 21% less energy than the SABC circuit. The main savings result from the lower energy required by the HPGR as compared to the SAG mill. However, an additional secondary crusher and conveyer system were required to facilitate the HPGR circuit.

Energy and Cost Comparisons of HPGR-based Circuits | E & MJ

The HPGR also produced a coarser product than the SAG mill. Thus, the energy needed for crushing, ball milling and material handling was higher for the HPGR option than the SABC circuit. When extending the target grind size to a P80 of 75 μm, the energy savings of the HPGR-ball mill circuit was only 7%.