# Operation of rod mills for Grinding of Magnetite ore

### Processing of Magnetite Iron Ores - Comparing Grinding ...

2021-10-21 Historically, the lowest operating cost was achieved by multistage fully autogenous grinding with integrated magnetic separation steps between the stages. The major benefit of fully autogenous grinding is the elimination of steel grinding media costs and the need to discriminate between steel and magnetite in coarse magnetic separation.

More### Processing of Magnetite Iron Ores – Comparing Grinding

Processing of Magnetite Iron Ores – Comparing Grinding Options B McNab1, A Jankovic2, D David3 and P Payne4 ABSTRACT Although the majority of current steel production is supported by iron ore

More### AMIT 135: Lesson 6 Grinding Circuit – Mining Mill

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.

More### Optimized magnetic separation for efficient recovery of V ...

We present an optimized magnetic separation process to improve the recovery of high-content vanadium and titanium concentrates from vanadium‑titanium magnetite (VTM) ore. The ore chunks were crushed using jaw crushers and then grinded in a laboratory rod mill for different grinding times and studied.

More### Processing of Magnetite Iron Ores - Comparing Grinding ...

Processing of Magnetite Iron Ores - Comparing Grinding Options. Although the majority of current steel production is supported by iron ore sourced from high-grade haemetite deposits, the long-term growing demand for steel has led to higher raw material prices and opened the way for many new magnetite deposits to also be developed.

More### AMIT 135: Lesson 8 Rod Mills – Mining Mill Operator

Typically R = 8. Rod Mill Charge: Typically 45% of internal volume; 35% – 65% range. Bed porosity typically 40%. Height of bed measured in the same way as ball mills. Bulk density of rods = 6.25 tons/m3. In wet grinding, the solids concentration 1s typically 60% – 75% by mass. A rod in situ and a cutaway of a rod mill

More### What is a Rod Mill? (with picture) - Info Bloom

A rod mill is an ore grinding mechanism that uses a number of loose steel rods within a rotating drum to provide its attrition or grinding action. An ore charge is added to the drum, and as it rotates, friction between the tumbling rods breaks the ore down into finer particles. Although similar in operation, a rod mill

More### Rod Mills for coarse grinding FLSmidth

Rod Mills - your solution for grinding coarse materials. Available in multiple sizes. Designs extend to 15 feet x 22 feet (21 feet effective). Though mill length is limited by manufacturing constraints for the grinding rods, our Rod Mills are available in

More### Optimized magnetic separation for efficient recovery of V ...

2021-10-1 Fig. S2 shows the particle size distribution of the VTM ore samples obtained after wet grinding in the rod mill. At grinding times of 5, 10, 15, 20, and 30 min, the mean particle size (d 50) was found to be 52.9, 60.9, 29.1, 27.1, and 20.3 μm, respectively, but the sample milled for the shortest time, i.e., 5 min, was found to contain a large ...

More### Effect of magnetite content on Bond work index and ...

Grinding is one of the most costly operations in the mechanical breaking and mining. Determination of the breakage characteristics and preconditioning is important to increase the grinding efficiency. Investigations of the seismic, mechanical and breakage properties of iron oxides are very important parameters for investigating the rock fragmentation by blasting and comminution processes in ...

More### Lab Rod Mill

2020-5-25 Laboratory Rod Mill is a lab grinding equipment for wet or dry grinding of ore. It is applied in labs for processing and fine grinding of artificial placer materials and ores in metallurgical, building material, chemical, light, coal, water conservancy, electric power, agricultural and geological industries.

More### Optimization of a grinding and classification circuit of a ...

2008-11-1 Computer simulation and mineral modeling was applied to the optimization of a grinding circuit in a plant processing 256 t/h magnetite. These tools were used to develop a grinding and classification configuration to decrease the grade of silica in the magnetite concentrate, which is produced by the plant. Empirical grinding and classification models were finely tuned using plant experimental ...

More### Processing of Magnetite Iron Ores – Comparing Grinding

Processing of Magnetite Iron Ores – Comparing Grinding Options B McNab1, A Jankovic2, D David3 and P Payne4 ABSTRACT Although the majority of current steel production is supported by iron ore

More### AMIT 135: Lesson 6 Grinding Circuit – Mining Mill

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.

More### Rod mills, how they function - Mine Engineer.Com

2012-11-26 The rods grind the ore by tumbling within the the mill, similar to the grinding balls in a ball mill. To prevent the conditions leading to rod charge tangling, the length to diameter ratio is maintained at 1.4 to 1.6. Rod mills accept feed up to about 50 mm (2

More### Processing of Magnetite Iron Ores - Comparing Grinding ...

Processing of Magnetite Iron Ores - Comparing Grinding Options. Although the majority of current steel production is supported by iron ore sourced from high-grade haemetite deposits, the long-term growing demand for steel has led to higher raw material prices and opened the way for many new magnetite deposits to also be developed.

More### Optimized magnetic separation for efficient recovery of V ...

2021-10-1 Fig. S2 shows the particle size distribution of the VTM ore samples obtained after wet grinding in the rod mill. At grinding times of 5, 10, 15, 20, and 30 min, the mean particle size (d 50) was found to be 52.9, 60.9, 29.1, 27.1, and 20.3 μm, respectively, but the sample milled for the shortest time, i.e., 5 min, was found to contain a large ...

More### Model Predictive Control - Rockwell Automation

2021-3-31 or rod mills for further size reduction. Types of mill Different types of mill are in operation e.g. rod or ball mills, so called depending on the steel based media placed internally to assist the grinding process. If no media is used i.e. the tumbling ore itself causes breakdown then the mill is called autogenous grinding or AG.

More### Lab Rod Mill

2020-5-25 Laboratory Rod Mill is a lab grinding equipment for wet or dry grinding of ore. It is applied in labs for processing and fine grinding of artificial placer materials and ores in metallurgical, building material, chemical, light, coal, water conservancy, electric power, agricultural and geological industries.

More### IRON BRIDGE MAGNETITE PROJECT PACKAGE

IRON BRIDGE MAGNETITE PROJECT PACKAGE 662NSP2059 – GRINDING MEDIA SCOPE OF WORK Iron Bridge Magnetite Project: AIP Scope of Work Project Overview: IB Operations Pty Ltd (IB Operations), as agent for the joint venture between FMG Magnetite Pty Ltd and Formosa Steel IB Pty Ltd, is developing a new magnetite

More### Ball Mills vs Rod Mills

2017-7-3 Rods in place weigh approximately 400 pounds per cu. ft. and balls in place approximately 300 pounds per cu. ft.. Thus, quantitatively, less material can progress through the voids in the rod mill grinding media than in the ball mill, and the path of the material is more confined. This grinding

More### Effect of magnetite content on Bond work index and ...

Grinding is one of the most costly operations in the mechanical breaking and mining. Determination of the breakage characteristics and preconditioning is important to increase the grinding efficiency. Investigations of the seismic, mechanical and breakage properties of iron oxides are very important parameters for investigating the rock fragmentation by blasting and comminution processes in ...

More### Optimization of a grinding and classification circuit of a ...

2008-11-1 Computer simulation and mineral modeling was applied to the optimization of a grinding circuit in a plant processing 256 t/h magnetite. These tools were used to develop a grinding and classification configuration to decrease the grade of silica in the magnetite concentrate, which is produced by the plant. Empirical grinding and classification models were finely tuned using plant experimental ...

More### Rod mills, how they function - Mine Engineer.Com

2012-11-26 The rods grind the ore by tumbling within the the mill, similar to the grinding balls in a ball mill. To prevent the conditions leading to rod charge tangling, the length to diameter ratio is maintained at 1.4 to 1.6. Rod mills accept feed up to about 50 mm (2

More### Reducing Grinding Energy and Cost - Magnetite Iron Ore ...

Reducing Grinding Energy and Cost - Magnetite Iron Ore Design Case Study A. Jankovic and W. Valery Process Technology Innovation, PO Box 1028, Eagle Farm Qld, 4009, Australia

More### Grinding control strategy on the conventional milling ...

2009-8-27 milling circuit consists of a rod mill followed by a ball mill in series. Crusher product (-9 mm) is fed to the rod mill, and the water is fed in ratio to the ore feed mass. The rod mill discharge is pumped, without any further water addition, to the first ball mill. The ball mill discharges to a sump where water is

More### Model Predictive Control - Rockwell Automation

2021-3-31 or rod mills for further size reduction. Types of mill Different types of mill are in operation e.g. rod or ball mills, so called depending on the steel based media placed internally to assist the grinding process. If no media is used i.e. the tumbling ore itself causes breakdown then the mill is called autogenous grinding or AG.

More### Optimized magnetic separation for efficient recovery of V ...

2021-10-1 Fig. S2 shows the particle size distribution of the VTM ore samples obtained after wet grinding in the rod mill. At grinding times of 5, 10, 15, 20, and 30 min, the mean particle size (d 50) was found to be 52.9, 60.9, 29.1, 27.1, and 20.3 μm, respectively, but the sample milled for the shortest time, i.e., 5 min, was found to contain a large ...

More### MINERAL PROCESSING - MILLING

2014-2-21 Rod mills are used for grinding hard minerals. This type of mill is usually used as the first stage of a milling process to provide a reduced size feedstock for a further milling process. Coke Products for the glass industry Cement clinker (needs to be dry) Table 5: Material Suitability for Rod Mills

More### Ball Mills vs Rod Mills

2017-7-3 Rods in place weigh approximately 400 pounds per cu. ft. and balls in place approximately 300 pounds per cu. ft.. Thus, quantitatively, less material can progress through the voids in the rod mill grinding media than in the ball mill, and the path of the material is more confined. This grinding

More### Outotec gets major HIGmill order for Iron Bridge

2019-10-18 Outotec has been awarded an order by Iron Bridge Operations (IBO) for the delivery of Outotec® HIGmill® high intensity grinding mills and services for the Iron Bridge Magnetite Project in Australia. IBO is a joint venture between Fortescue Metals Group subsidiary FMG Magnetite

More### CORRELATION BETWEEN BOND WORK INDEX AND

2014-6-27 entire comminution process and the overall mining operation. The ball mill is a common piece of equipment in grinding circuits. Modeling the grinding process in a ball mill is a complex task. Balls and individual parti cles of varying sizes and geometries

More### Laboratory Rod Mill Laboratory Rod Grinding Mill Bench ...

2014-10-9 Description. XMB series rod ball mill is an efficient laboratory grinding equipment for wet grinding of ore or other materials. Steel balls can be used as grinding medium instead of steel rods. In rod grinding operation, particle sizes of final product are relatively uniform and ore

More### Reducing Grinding Energy and Cost - Magnetite Iron Ore ...

2021-10-6 Reducing Grinding Energy and Cost - Magnetite Iron Ore Design Case Study Efficiency of the comminution operations is traditionally assessed based on operating cost and energy consumption. Traditionally, the lowest operating cost was achieved by multi-stage fully autogenous grinding due to elimination of steel grinding media costs which may ...

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