May 1, 2009
Where do you begin when choosing the right washing/classifying equipment for your operation? Start with this line up of equipment.
by Kerry Clines, Senior Editor
Aggregate Innovations says its SR control installs quickly and easily, and gives the plant operator total control of the sand classifying tank. Tank valve settings are displayed in percentages on the 10-inch LED touch screen. With a simple touch of the screen the operator can change valve settings, change the product, dump valves, and clean out the classifying tank. Optional hydraulic oil level and pressure sensors monitor hydraulic malfunctions in the classifying tank.
Transportable, low maintenance
Buell’s new 75 ton-per-hour transportable classifier system uses a dry process for the removal of minus 200 mesh material to produce an in-spec manufactured sand product. The company says the dry process makes it possible to sell fines as a second product. The classifier has no moving parts, which reduces the maintenance requirements. The system has a 75-ton-per-hour inlet feed rate, an air flow of 14,400 ACFM, and requires 120 total horsepower. The classifier can be transported with no escort and can be set up in one day. Buell is offering free replacement component parts for three years on the system.
Stationary, semi-portable, portable systems
GreyStone Inc. says its Aggre-Spec sand classifying systems are available in stationary, semi-portable, and portable units. Stationary structures offer from six to 11 classifying stations with three cells. Tanks, with 10 classifier models, range in size from 8 by 20 feet to 12 by 48 feet. Semi-portable systems feature a modular, low-profile construction and stand-up design for quick installation. The line includes 18 classifier models ranging in size from 8 by 24 feet to 12 by 48 feet and offers seven to 11 classifying stations that produce up to 820 tons per hour. Portable systems (shown) feature a low-profile design for quick transport and installation. The line includes eight classifier models ranging in size from 8 by 24 feet to 10 by 40 feet and offers from seven to 11 classifying stations that produce up to 350 tons per hour.
Windows-based control system
GreyStone Inc.’s Windows-based control system for classifying systems allows producers to make an unlimited number of recipes from two products. The company says the system holds to tight product specifications and warns operators of potential out-of-spec product conditions. The Aggre-Spec V6 re-blending system (shown) allows operators to view information on one screen and can be accessed from a laptop. According to the company, the V6 increases production by up to 15 percent, re-blends up to three spec products using single or twin tank controls, and offers simple spec changes and multi-tasking capabilities.
KPI-JCI says its new patented all-in-one portable self-erecting plant features a 36-inch twin blade mill, a 44-inch twin fine material washer, and a 6- by 20-foot three-deck horizontal vibrating screen, all on one portable chassis. The compact 1830PHB sets up in approximately 4 hours and has a production rate of up to 500 tons per hour.
Designed to fit the needs
McLanahan Corp. says it provides solutions, not just products, by putting together older and newer technologies to suit each customer’s needs. The company says its experts can analyze needs and provide a viable solution by using industry-proven equipment in innovative ways to lower cost production and downtime.
Metso Minerals North America says it can make the wash screen in an aggregate washing and classifying system more efficient. Metso’s factory-installed spray system provides 3 to 5 gallons per minute per ton per hour of feed material. A grease-lubricated vibrator like the MV vibrator works best in wet applications to prevent water and dirt contamination and provides a no-leak lubrication system, according to the company.
Phoenix Process Equipment
Wash plant thickener
Phoenix Process Equipment Co. says its Model US ultra-high-rate thickener for sand wash plant slurries features no moving parts, minimal space requirements, high underflow solids, and complete factory assembly. The company says other benefits include minimum capital investment, lower installation cost, site-to-site mobility, no mechanical maintenance, and a reduced pond storage area. Pilot units are available for on-site field demonstrations.
Compact, energy conscious
Powerscreen says its compact Finesmasters are today’s most efficient, cost effective, and energy-conscious units on the market. The systems have been engineered for quick installation and feature three key elements: sump and rubber lined slurry pump, rubber-lined hydro cyclones, and high-frequency dewatering screen. The unit uses centrifugal force within the cyclone to remove clays, silts, and slime from sand to bring it into specification.
Built to order
Process Machinery, Inc. works with each customer to design and deliver built-to-order washing and classifying plants. The company says it builds the structures that support screens and screws, chute work, blending gates, rollaway chutes for screen access, etc., making it possible to deliver a complete and personalized plant package to each customer.
Sturtevant Inc. says its air classifiers balance the physical principles of centrifugal force, drag force, and gravity to generate a high-precision method of classifying particles according to size and density. The whirlwind air classifier handles feed capacities from 1 to 800 tons per hour with a screen fineness of 100 to 400 mesh. A superfine air classifier is available in 3- and 6-foot-diameter models with feed capacities from 0.5 to 15 tons per hour. The side draft air classifier handles feed capacities from 4 to 1,000 tons per hour with a screen fineness of 100 to 400 mesh.