Clean mud and soluble clay from gravel feed material with GreyStone
blade mill washers. Strategically located, spirally positioned paddles and full-diameter flights provide the necessary aggregate abrading and washing action to deliver cleaner spec product, while maintaining required production levels. Removable gates adjust the tub water level to tailor the aggregate washing action to specific circuit requirements.
The shaft-mounted gear reduction is totally enclosed within an oil bath gear box. The reduction is designed with easy service and customer convenience in mind. The V-belt drive comes complete with V-belt guard. By simply changing the drive pulley on the motor, you may increase or decrease the speed to custom tailor the washing action on your material. All standard electric motors are 230/460 Volt, 3-phase, 60 Hz. Parts required for routine maintenance are standard off-the-shelf items and are easily found in most metropolitan areas worldwide.
A heavy-duty drive is used on all GreyStone washers. Based on the use of standard, direct, shaft-mounted gear reducers, the drive provides several significant advantages.
The heavy stub of mirror-smooth, heat-treated shafting is fitted into a hard chrome steel wear sleeve. Shaft and sleeve are driven through a heavy-duty rubber seal that fits snugly between the connecting disc and tub. A specially designed slinger fits perpendicular to the shaft between the roller bearing and sleeve and turns with the shaft adding further protection to the outside mounted bearing from possible seal leakage.
GreyStone Blade Mill Aggregate Washers have externally mounted, greaseable pillow block bearings that are designed to be adjustable. This feature allows you to make a field adjustment of the clearance between the spiral flight and the belly plate to increase or to decrease the clearance. The grease fittings are conveniently located on the outside of the tub. The lower bearings can be lubricated while in operation. These bearings are standard off-the-shelf items, readily available in all metropolitan cities worldwide.
GreyStone paddles and wear shoes are made of heavy Ni-Hard. Paddle mounting bases are constructed from heavy structural quality steel to give years of service. GreyStone Blade Mill Washers are designed to thoroughly scrub and wash aggregate up to 2 inches. Mud and soluble clay may be washed from your gravel with a blade mill washer. Mud and soluble clay are broken by the abrading of the aggregate and washing action. The washing action is accomplished by material abrading against material. This material movement is accomplished by the specially designed shaft with spirally positioned paddles and strategically located, full-diameter flights. This design will provide thorough washing action while maintaining your required production level. Additional water may be added through the optional rising current belly pan or by adding spray bars at the upper end of the blade mill.
GreyStone washers are equipped with a heavy-duty skid frame. Pull a GreyStone to where it's needed without using a crane...Exclusively GreyStone!
Strong and rigidly constructed screw washers are designed to provide years of maintenance-free service. GreyStone tubs are all of welded construction and are made of 1/4" thick ASTM A-36 steel plate with an angle iron skid frame. GreyStone machines have a heavy belly plate which is curved to fit tightly to the screw shaft. During operation, this feature keeps sand from slipping back and will maintain your production level. GreyStone also offers Blade Mills with a long tub design. This long tub comes standard with a side-mounted adjustable water weir. These features may be used to allow the aggregate to dewater after it has moved out of the pool area. A spray bar may be used to rinse the aggregate before it is discharged from the washer. In some operations, this longer tub will eliminate the need for a dewatering screen as the aggregate is discharged.
An easily adjustable water weir will allow you to remove or add gates to adjust your water level within the tub. This unique feature will allow you to tailor the washing action to your aggregate needs.
The rising current water enters the pool from the bottom and filters up - separating fines, dirt and other extraneous matter which are carried to the top and forced out the overflow water weir.
Support legs are available to adjust the tub slope from 2° to 8°, matching washing action to material requirements.
