Where is balls mills a town

We have a lot of trails for hiking. Just five minutes from my home there are few of them where you can walk o ride for hours. Have a nice day and weekend! Beautiful images. The Autumn colours are just marvellous and captured so well. As was said, a true feast for the eyes. Thank you. This is the time of the year when the Nature is quiet and peaceful. Great time for walking in the woods. You are commenting using your WordPress. You are commenting using your Google account.

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Merci beaucoup. November 7, at am Reply. October 30, at am Reply. Kendi Karimi. Such beautiful photography. Where the finished product does not have to be uniform, a ball mill may be operated in open circuit, but where the finished product must be uniform it is essential that the grinding mill be used in closed circuit with a screen, if a coarse product is desired, and with a classifier if a fine product is required. In most cases it is desirable to operate the grinding mill in closed circuit with a screen or classifier as higher efficiency and capacity are obtained.

Often a mill using steel rods as the grinding medium is recommended, where the product must have the minimum amount of fines rods give a more nearly uniform product. Often a problem requires some study to determine the economic fineness to which a product can or should be ground. In this case the Equipment Company offers its complete testing service so that accurate grinding mill size may be determined. Until recently many operators have believed that one particular type of grinding mill had greater efficiency and resulting capacity than some other type.

However, it is now commonly agreed and accepted that the work done by any ball mill depends directly upon the power input; the maximum power input into any ball or rod mill depends upon weight of grinding charge, mill speed, and liner design. This fact should be carefully kept in mind when determining the capacity of a Steel- Head Ball-Rod Mill, as this unit can carry a greater ball or rod charge and has potentially higher capacity in a given size when the full ball or rod charge is carried.

A mill shorter in length may be used if the grinding problem indicates a definite power input. This allows the alternative of greater capacity at a later date or a considerable saving in first cost with a shorter mill, if reserve capacity is not desired. The capacities of Ball-Rod Mills are considerably higher than many other types because the diameters are measured inside the liners. A grate discharge may give beneficial results on certain ores especially where an excess of fine sizes is detrimental.

Small Ball Mill Capacity and Sizing. The correct grinding mill depends so much upon the particular ore being treated and the product desired, that a mill must have maximum flexibility in length, type of grinding medium, type of discharge, and speed. With the Ball-Rod Mill it is possible to build this unit in exact accordance with your requirements, as illustrated. To best serve your needs, the Trunnion can be furnished with small standard , medium, or large diameter opening for each type of discharge.

The sketch shows diagrammatic arrangements of the four different types of discharge for each size of trunnion opening, and peripheral discharge is described later. The overflow type is more commonly used as it is lower in first cost. These mills have large trunnion openings which allow high circulating loads to be carried if desired.

Any overflow type mill can be easily converted to a grate discharge type by merely adding the improved grate head liners and the proper shell liners, or vice versa. Ball-Rod Mills of the grate discharge type are made by adding the improved type of grates to a standard Ball-Rod Mill. These grates are bolted to the discharge head in much the same manner as the standard headliners. The grates are of alloy steel and are cast integral with the lifter bars which are essential to the efficient operation of this type of ball or rod mill.

These lifter bars have a similar action to a pump: i. These Discharge Grates also incorporate as an integral part, a liner between the lifters and steel head of the ball mill to prevent wear of the mill head. By combining these parts into a single casting, repairs and maintenance are greatly simplified. The center of the grate discharge end of this mill is open to permit adding of balls or for adding water to the mill through the discharge end.

Instead of being constructed of bars cast into a frame, Grates are cast entire and have cored holes which widen toward the outside of the mill similar to the taper in grizzly bars. The grate type discharge is illustrated. The peripheral discharge type of Ball-Rod Mill is a modification of the grate type, and is recommended where a free gravity discharge is desired. It is particularly applicable when production of too many fine particles is detrimental and a quick pass through the mill is desired, and for dry grinding.

The drawings show the arrangement of the peripheral discharge. The discharge consists of openings in the shell into which bushings with holes of the desired size are inserted. On the outside of the mill, flanges are used to attach a stationary discharge hopper to prevent pulp splash or too much dust. The mill may be operated either as a peripheral discharge or a combination or peripheral and trunnion discharge unit, depending on the desired operating conditions.

If at any time the peripheral discharge is undesirable, plugs inserted into the bushings will convert the mill to a trunnion discharge type mill.

The head and shell liners for Ball-Rod Mills can be furnished of:. These liners are all of ample thickness to give long life and uniform wear, yet, when new, they do not unduly decrease the capacity of the ball mill.

What is Decolloy? Decolloy is one of the hardest and toughest white cast iron compositions commercially available. It is essentially a high carbon base chrome and nickel iron.

Unless otherwise specified, a hard iron liner is furnished. This liner is made of the best grade white iron and is most serviceable for the smaller size mills where large balls are not used.

Hard iron liners have a much lower first cost. Electric steel, although more expensive than hard iron, has advantage of minimum breakage and allows final wear to thinner section. Steel liners are recommended when the mills are for export or where the source of liner replacement is at a considerable distance.

Molychrome steel has longer wearing qualities and greater strength than hard iron. Breakage is not so apt to occur during shipment, and any size ball can be charged into a mill equipped with molychrome liners. The first cost is the highest, but in most cases the cost per ton of ore ground is the lowest. The feed and discharge trunnions are provided with cast iron or white iron throat liners. As these parts are not subjected to impact and must only withstand abrasion, alloys are not commonly used but can be supplied.

Liners for any size mill are of such dimensions and weight that they will pass through the manhole without difficulty. Gears for Ball-Rod Mills drives are furnished as standard on the discharge end of the mill where they are out of the way of the classifier return, scoop feeder, or original feed. Due to convertible type construction the mills can be furnished with gears on the feed end. Gear drives are available in two alternative combinations, which are:.

The gears are provided with a substantial web centrally placed, machined on both faces and drilled to template so that if the gear is worn on one side, it can be reversed, as both sides are machined. All pinions are properly bored, key-seated, and pressed onto the steel countershaft, which is oversize and properly keyseated for the pinion and drive pulleys or sheaves. The countershaft operates on high grade, heavy duty, nickel babbitt bearings. The three point bearing pinion shaft insures perfect alignment, and longer, more dependable life.

Shaft and bearings are heavy and of ample size; bearings are hooded to exclude dirt. The bearings are mounted on heavy sole plates which give perfect alignment.

These sole plates are provided with take-ups for easy and quick adjustment. Any type of drive can be furnished for Ball-Rod Mills in accordance with your requirements.

Belt drives are available with pulleys either plain or equipped with friction clutch. Various V- Rope combinations can also be supplied.

The most economical drive to use up to 50 H. For larger size motors the wound rotor slip ring is recommended due to its low current requirement in starting up the ball mill. Should you be operating your own power plant or have D.

If switches are to be supplied, exact voltage to be used should be given. Even though many ores require fine grinding for maximum recovery, most ores liberate a large percentage of the minerals during the first pass through the grinding unit. Thus, if the free minerals can be immediately removed from the ball mill classifier circuit, there is little chance for overgrinding. This is actually what has happened wherever Mineral Jigs or Unit Flotation Cells have been installed in the ball mill classifier circuit.

With the installation of one or both of these machines between the ball mill and classifier, as high as 70 per cent of the free gold and sulphide minerals can be immediately removed, thus reducing grinding costs and improving over-all recovery. The advantage of this method lies in the fact that heavy and usually valuable minerals, which otherwise would be ground finer because of their faster settling in the classifier and consequent return to the grinding mill, are removed from the circuit as soon as freed.

This applies particularly to gold and lead ores. The Mineral Jig is a high speed fine mineral recovery unit and is distinctive in that it does not dilute the circuit; minimum water is used due to synchronization of the valve with plunger stroke.

Ball-Rod Mills have heavy rolled steel plate shells which are arc welded inside and outside to the steel heads or to rolled steel flanges, depending upon the type of mill. The double welding not only gives increased structural strength, but eliminates any possibility of leakage.

Where a single or double flanged shell is used, the faces are accurately machined and drilled to template to insure perfect fit and alignment with the holes in the head.

These flanges are machined with male and female joints which take the shearing stresses off the bolts. The Ball-Rod Mill Heads are oversize in section, heavily ribbed and are cast from electric furnace steel which has a strength of approximately four times that of cast iron.

The head and trunnion bearings are designed to support a mill with length double its diameter. This extra strength, besides eliminating the possibility of head breakage or other structural failure either while in transit or while in service , imparts to Ball-Rod Mills a flexibility heretofore lacking in grinding mills.

The manhole cover is protected from wear by heavy liners. An extended lip is provided for loosening the door with a crow-bar, and lifting handles are also provided. The manhole door is furnished with suitable gaskets to prevent leakage. The trunnions are an integral part of the steel heads and are turned true with the axis of the mill. After machining, the trunnions are given a polished surface to minimize friction. The mill trunnions are carried on heavy babbitt bearings which provide ample surface to insure low bearing pressure.

If at any time the normal length is doubled to obtain increased capacity, these large trunnion bearings will easily support the additional load. Trunnion bearings are of the rigid type, as the perfect alignment of the trunnion surface on Ball-Rod Mills eliminates any need for the more expensive self-aligning type of bearing. The highest grade nickel babbitt obtainable is used in the trunnion bearings and pinion shaft bearings. The cap on the upper half of the trunnion bearing is provided with a shroud which extends over the drip flange of the trunnion and effectively prevents the entrance of dirt or grit.

The bearing has a large space for wool waste and lubricant and this is easily accessible through a large opening which is covered to prevent dirt from getting into the bearing. Ball and socket bearings can be furnished. Scoop Feeders for Ball-Rod Mills are made in various radius sizes.

Welded steel scoop feeders can, however, be supplied in any radius. The correct size of feeder depends upon the size of the classifier, and the smallest feeder should be used which will permit gravity flow for closed circuit grinding between classifier and the ball or rod mill. All feeders are built with a removable wearing lip which can be easily replaced and are designed to give minimum scoop wear.

A combination drum and scoop feeder can be supplied if necessary. This feeder is made of heavy steel plate and strongly welded. These drum-scoop feeders are available in the same sizes as the cast iron feeders but can be built in any radius.

Scoop liners can be furnished. The trunnions on Ball-Rod Mills are flanged and carefully machined so that scoops are held in place by large machine bolts and not cap screws or stud bolts. The feed trunnion flange is machined with a shoulder for insuring a proper fit for the feed scoop, and the weight of the scoop is carried on this shoulder so that all strain is removed from the bolts which hold the scoop.