Wet type ball mill are mostly used in the industry production. It is to increase the high grinding efficiency under the ball mill grinding and striking, from which the granularity is even and no flying dust with little noise, being the most universal powder machine in the benefication as powder grinding the ferrous metal like gold, silver, plumbum, zinc,copper,molybdenum,manganese,tungsten etc, as the nonmetal powder grinding like graphite,feldspar, potash feldspar, phosphorus ore, fluorite, clay, and swell soil etc. The wet type ball mill need to add the liquid into the grinding ball media auxiliary (water or ethanol). The material output gate is trumpet shape, with screw device inside, easy to discharging the material.
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After the grinding circuit has been brought up to normal operating conditions, the operator must monitor the various process variables and alarms. Most of these variables are monitored in the mill control room, however, the operator is also required to sample and analyse process streams and read local indicators.
The ball mill is susceptible to variations in ore hardness resulting in various grinds at constant throughput, or alternatively, various tonnages at constant grind. The variation in grind is not directly determined. However, a changing cyclone overflow density, at a constant tonnage rate and feed density, would be indicative of changing ore hardness and in that case the tonnage fed to the ball mill should be changed accordingly.
The ore feed rate to the ball mill is controlled by the weightometer located on the mill feed conveyor which can be manually adjusted with in the control room to give a constant weight reading. The signal from the weightometer increases or decreases the belt feeder speed and adjusts the water addition to the ball mill (as a function of the actual weight reading). Both weight control and the proportion of water can be adjusted in the control room.
The water rationing controller must be adjusted programmatically to give the desired ball mill discharge density (normally 60-65% solids). The ball mill discharge density should be checked manually at regular intervals and adjustment made to water ratio controller setpoint to adjust the ball mill discharge density.
The grinding circuit operator must ensure that the ball mill runs properly loaded and gives the correct ore grind. A major practical indication of mill loading is the sound made by the mill. A properly loaded mill will have a deep rhythmic roar, while an under loaded mill will have a metallic rattling type noise and an overloaded mill will be quite silent.
The operator must manually measure the cyclone overflow and underflow densities regularly. An increase in overflowdensity is indicative of softer ore and will soon be accompanied by a lowering of power draw at the mill and a change of sound indicating that the mill is becoming under loaded. To compensate, feed tonnage must be increased. Similarity, a decrease in the cyclone overflow density is indicative of harder ore and this will be accompanied eventually by a coking of the mill. Feed to the ball mill must be reduced.
In the event of an emergency, the mill feed conveyor is shut down individually or by stopping the operating cyclone feed pump. The ball mill must be shut down separately. All equipmentshutdowns are performed locally or from the MCC located in the mill control room.
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Conveyor belt materials spillage protection and straight running friction simulation skirt rubber and pulley lagging sheet manufactured of quality natural rubber compound and rubber-lagging sheet produced of synthetic rubber neoprene or SBR rubber diamond grooved or plain finish made in India by HIC Universal.
HIC Universal Skirt-rubber and diamond lagging sheet are Original Choice by conveyor component and belt conveyor system manufacturers in India, China, Australia, South Africa, United States, Canada North America, Peru Latin America, Brazil South America, Germany Europe, Russian Federation, Chile, Mexico, England-UK, Saudi Arabia, Indonesia, Yemen and other Asian countries.
INDIA Headquarters Contact HIC Conveyor Drive Rubber Manufacturers India D-136, Shankar Road New Delhi 110060 India - Asia Phone :+91 72890 45000 Cell : +91 88266 79660 ; Skype : anilguptahic E-mail : universal[at]hic-india(dot)com, export(at)hicrubber(dot)com Contact Person : Mr. Anil Gupta - President, Ms. Priyum - Exports Head
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With more than 100 years of experience in developing this technology. Metso Outotec has designed, manufactured and installed over 8,000 ball and pebble mills all over the world for a wide range of applications. Some of those applications are grate discharge, peripheral discharge, dry grinding, special length to diameter ratio, high temperature milling oprations and more.
All equipment adheres to the applicable standards set by ASTM, NEMA, AGMA, AWS, and ANSI. Reliable and effective grinding mills includes being safe throughout. When the mills are quoted we make sure to include any and all safety components needed.
Metso Outotec process engineers welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of the milling plant. Automatic operation saves power, grinding media, and liner wear, while increasing capacity.
To ensure top-of-the-line operation, software can be developed to suit the most complicated circuits and complex ores. Our engineers can specify or supply computer control systems for your sophisticated circuit needs. These controls are feasible for also smaller installations.
Three types of tests are available for mill power determinations. In most cases one of two bench scale tests is adequate. First, a Jar Mill grindability test requires a 5 lb. (2 kg) sample and produces a direct measured specific energy (net Hp-hr/t) to grind from the design feed size to the required product size. The second test, a Bond Work Index determination, results in a specific energy value (net Hp-hr/t) from an empirical formula.
If time permits and the user wishes, grinding circuits are set up and continuous tests are run to simulate plant operation. These tests require two or three days for each ore type and approximately 1,000 pounds of material for each day of testing. Variations in ore hardness or circuit design may require larger samples.
Metso Outotec Premier horizontal grinding mills are customized and optimized grinding solutions built on advanced simulation tools and unmatched expertise. A Metso Outotec Premier horizontal grinding mill is able to meet any projects needs, even if it means creating something novel and unseen before.
Metso Outotec Select horizontal grinding mills are a pre-engineered range of class-leading horizontal grinding mills that were selected by utilizing our industry leading experience and expertise. With developing a pre-engineered package, this eliminates a lot of the time and costs usually spent in the engineering and selection stages.
Rexline REXBOND Cold Solution is a two component system used for splicing and repairs of conveyor belts. It provides quick, strong bonding of Rubber-to-Rubber, Rubber-to Fabric and Rubber-to-Metal. Applications include conveyor belt splices and pulley lagging. It is also used for application of wear and corrosion resistance materials like liners for chutes, bunkers, tanks, pipes, etc. Rexline REXBOND provides excellent initial and final bonding strengths with an ideal curing time of 6 hours. Bonding strength is increased when used with products having Rexline Bonding Layer
Rexline Engineering Vulcanizing Presses offer quality equipment designed for trouble-free operation in the harshest conditions. Our presses are easy to set-up and operate.Our presses are built to provide uniform heating and pressure accross the entire splice area, with heating up to 180C and specific pressure up to 14kg/cm2. Its quick heating and Integrated Cooling Platens enable short splicing cycles cutting downtime. Presses are designed to be used stand-alone or in combination with other Rexline presses.
Spot Repair Presses offer a portable solution for belt repairs. Its lightweight construction and compact design allow you to repair areas from 300 mm and higher. Pressure is built up with a motor-driven pump unit or manually with a reciprocating piston hand pump.
Rexline Frame Presses are designed for quick and easy operation. Its two piece frame construction is made of lightweight aluminum and is easily transported and setup. Can be used in combination with multiple Rexline Frame Presses to cure larger splice lengths.Get in Touch with Mechanic