Oct 12 2017 · Ball mill is a fine grinder A horizontal or vertical rotating cylinder which is filled partially with the balls of ceramics small rocks and balls made from stainless steel The ball charge of a SAG mill is about 29 to 30 By friction and influence of tumbling balls inside rotating cylinder grinds the raw material to the required fineness
As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.
Feeding Granularity: ≤20-≤25mm
Applied Materials: Limestone, calcite, barite, dolomite, potassium feldspar, marble, talcum, gypsum, kaolin, bentonite, medical stone, rock phosphate, manganese ore, iron ore, copper ore, gold ore,quartz, active carbon, carbon black, ceramic, coal, etc.
Applicable Range: Cement, silicate product, new building material, refractory material, fertilizer, black and non-ferrous metal ore dressing and glass ceramics production industry, etc.
Feeding Size: 400-1200mm
Production Capacity: 45-500TPH
Applied Materials: Limestone, granite, basalt, andesite, iron ore, quartz, diabase, iron ore, gold ore, copper ore,etc.
Feeding Size: 0-1000mm
Processing Capacity: 30-500TPH
Applied Material: River gravel, limestone, granite, basalt, diabase, andesite and so on.
Feeding Size: 65-300mm
Discharging Size: 3-60mm
Production Capacity: 12-1000t/h
In accordance with the field visit of working site and technical guidance, Fote Machinery introduced 3 stages crushing process for our customer.
Application Area:Building materials, chemicals, fertilizer, metallurgy, mining, refractory, ceramic, steel, thermal power, coal, etc.
This customer is from a construction company in Bamako, Mali. According to our customer's high demand of production capacity and granularity of finished production, our engineer assembled 2 mobile crushing stations of FTM1142E710 model and FTM3S186PYF13 m
The whole equipment includes vibrating feeder, jaw crusher, Raymond mill, bucket elevator, belt conveyor, adjusting hopper, control cabinet, etc. The main grinding equipment is our patented product, 4525 Raymond Mill, with the capacity of 35t/h.
Semiautogenous plus ball mill has been the “work horse” of mills SAG vs Ball Mill Advantages AG SAG Mill Grinding Compared – Which is Best Grinding rods and balls can be obtained in uniform sizes weights and of a specified quality Their action in a mill can be reasonably predicted
If the ball charge rate is between 812 it will be SAG mill If it is more than this it will be ball mill SAG Mills effect is mainly crush the big ores and then use ball mill to grinding the small ores
A Ball Mill Critical Speed actually ball rod AG or SAG is the speed at which the centrifugal forces equal gravitational forces at the mill shell’s inside surface and no balls will fall from its position onto the shell The imagery below helps explain what goes on inside a mill as speed varies Use our online formula The mill speed is typically defined as the percent of the Theoretical
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity FullerTraylor SAGAG Mills range in size from 43m through 122m in diameter with powers as high as 28000 kW
above the nominal mill throughput Considering a mill runtime of 94 and a final P80 size of 180 micrometers the proposed circuit consists of a SAG mill 40 feet in diameter and 25 feet in length EGL with an installed gearless motor of 30 MW and two 28 feet diameter by 445 feet in length ball mills equipped with 22 MW gearless motors
sizes The results of these studies showed that a single line 40 ft SAG mill circuit gave the best project economics Further work was followed up to optimize the 40 ft SAG mill size with the results showing that a slightly more expensive 42 ft SAG mill with equivalent power to the 40 ft SAG mill enhanced the project economics
When the mill is rotated without feed or with very fine feed the rods are in parallel alignment and in contact with one another for their full length New feed entering at one end of the mill causes the rod charge to spread at that end This produces a series of wedge shaped slots tapering toward the discharge end The tumbling and rolling rods expend most of their crushing force on the
Every mining operation has a unique grinding process Metso has experience of over 8000 grinding mills globally including manufacturing and delivering the largest SAGAG mills in the world Our experts welcome the opportunity to assist you with circuit and circuit control design as well as startup operation and optimization of your mill
SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates Typical tests required to define a hardness variability function are given below in Figure 1
sag mill and ball mill SAG is an acronym for semiautogenous grinding SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21 The largest SAG mill is 42 128m in diameter powered by a 28 MW 38000 HP motor Get a Quote
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity FullerTraylor SAGAG Mills range in size from 43m through 122m in diameter with powers as high as 28000 kW
above the nominal mill throughput Considering a mill runtime of 94 and a final P80 size of 180 micrometers the proposed circuit consists of a SAG mill 40 feet in diameter and 25 feet in length EGL with an installed gearless motor of 30 MW and two 28 feet diameter by 445 feet in length ball mills equipped with 22 MW gearless motors
sizes The results of these studies showed that a single line 40 ft SAG mill circuit gave the best project economics Further work was followed up to optimize the 40 ft SAG mill size with the results showing that a slightly more expensive 42 ft SAG mill with equivalent power to the 40 ft SAG mill enhanced the project economics
Mill Critical Speed Determination The Critical Speed for a grinding mill is defined as the rotational speed where centrifugal forces equal gravitational forces at the mill shells inside surface This is the rotational speed where balls will not fall away from the mills shell
LG A mill power equation for SAG mills Minerals and Metallurgical Processing Feb 1990 pp5762 Gross power No load power Net power drawn by the charge 813 The net power is calculated from Net power KD25L e c Watts 814 In equation 814 D is the diameter inside the mill liners and Le is the effective length of the mill including the
SAG mill translation in EnglishFrench dictionary en The invention relates to a double coating for SAG mills which allows installation and replacement times to be reduced and which is formed by a first liner part 3 consisting of a first steel plate 9 mounted on a first rubber base 11 and a second liner part 3 consisting of a second steel plate 10 mounted on a second rubber base
Optimization of mill performance by using online ball and pulp measurements by B Clermont and B de Haas Synopsis Ball mills are usually the largest consumers of energy within a mineral concentrator Comminution is responsible for 50 of the total mineral processing cost In today’s global markets expanding mining groups are trying
Metso has experience of over 8000 grinding mills globally including manufacturing and delivering the largest SAGAG mills in the world Our experts welcome the opportunity to assist you with circuit and circuit control design as well as startup operation and optimization of your mill
A typical SAGHPGRBall mill circuit suggested by Patzelt et al 6 is shown in Figure 96 where the pebbles from the SAG mill are crushed in the highpressure grinding rolls It is a general observation that SAG mills are helpful for grinding where wide variations in the grindability of ores are experienced
ABB’s GMD is the most powerful mill drive system in the market to power semiautogenous SAG ball and autogenous AG mills This ’workhorse’ for grinding operations combines a robust servicefriendly and fit for purpose design to provide highest throughput reliability
mills in the older plants that had many mills in parallel In fact this is generally still the case in the multistream plants where mill liner design and selection is only tackled on a cost consumables basis However the gains to be had through good liner design and selection are just as great as on the large SAG mills
SAG mills are the main workhorses in the majority of comminution circuits globally They need to be fed and kept working round the clock But challenges can arise when capacity is not optimised causing unnecessary downtime and liner wear leading to the one sound operators do not want to hear the sound of the mills standing still