Engineering & Mining Journal

JUN 2019

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 89 of 115

CONVEYORS 88 E&MJ • JUNE 2019 COMPANY PROFILE-PAID ADVERTISEMENT Tsurumi Submersible Pumps for High Temperature Liquids of up to 90°C Tsurumi Manufacturing Co., Ltd. was founded in Japan in 1924, and has since been engaged in the manufacture, purchase and sales of various pumps, environmental equipment and peripherals — submersible pumps are key products. Tsurumi offers pumps for various liquids including those difficult to handle, such as seawater, corrosive liquids and high tempera- ture liquids, as well as pumps for general wastewater. Here, we introduce our "submersible pumps for high temperature liquids." Tsurumi manufactures submersible pumps that can drain high tem- perature liquids of up to 90°. There are many applications that need such drainage capability, e.g., draining hot spring water from mines located in volcanic zones, or draining industrial wastewater from power plants or iron- works. Tsurumi's standard pumps can drain liquids of up to 40°C, while some models can handle liquids of 60°C to 90°C. These latter provide specifications suitable for the temperatures of the liquids they handle, i.e., high-grade insulation and high-quality rubber materials, and lubrication oil and bearing grease for coping with high temperature liquids. Targeting these markets, three types of pumps are available: the KTZ- series (for draining general wastewater), GPN-series (for draining slurry) and SFQ-series (for draining corrosive liquids). The KTZ-series is posi- tioned amongst Tsurumi's general-purpose pumps as a flagship model, with their impellers made of high-chromium cast iron and heavy-duty structure. The GPN-series offers high-power slurry pumps equipped with an agitator, wherein the impeller, suction plate and agitator are made of high-chromium cast iron and the shaft is made of chromium molybdenum steel that provides excellent strength and hardness. The SFQ-series of Tsurumi Manufacturing Co., Ltd. KTZ: Drainage Pumps SFQ: Corrosion-Resistant Pumps GPN: Slurry Pumps pumps are for corrosive liquids, as the principal wetted parts are made of 316 stainless steel, while those parts that need consideration for wear resistance, such as the impeller and pump casing, are made of 316 stain- less steel casting. Also, the SFQ-series can withstand liquids of pH values of 2 to 13, which includes strong acids. These pumps are equipped with an anti-wicking cable entry and inside mechanical seal with silicon carbide face, as standard features. Tsurumi gives first priority to designing pumps that ensure continuous duty for a long period of time, by providing reliability and durability that enable stable operation even under harsh environments. To order any of these models, contact an authorized dealer. * The OO series is indicated with our series code in this text. 14 Ways Curved Conveyors Reduce Costs By Brad Williams, vice president sales and development, BEUMER Conveying & Loading Division Curved conveyor technology designed for the mining industry al- lows for a single-flight system that costs less to supply, install and operate than a conventional conveyor system, and offers long-term financial and environmental benefits when compared with trucking. A single-flight, curved conveyor system eliminates the cost of trans- fer tower steel and foundations, and greatly reduces the quantity of components and necessary spare parts. It reduces the dust, noise, maintenance and operating costs associated with multiple transfer points, and it offers 98% reliability compared with roughly 92% reliability of four conveyors operating in series, for example. For those considering curved conveyor technology for min- ing operations, here are several examples of how a single-flight system reduces costs when compared with a series of multiple conventional conveyors: 1. Routine (weekly or daily) inspections at intermediate trans- fer towers are not required with an overland conveyor. Time spent on inspections and routine maintenance at drive stations, belt turnovers, and takeup areas is reduced. 2. Material spillage cleanup, noise concerns and dust collec- tion at intermediate transfers are all eliminated. 3. Wear parts such as skirtboard rubber and chute liners are drastically reduced with fewer conveyors and transfers. 4. Fewer idler replacements are necessary because the over- land conveyor system requires about one-half of the idlers of a traditional conveying system. 5. Fewer pulley bearings to grease. 6. Fewer belt scrapers to adjust and fewer scraper blade replacements. 7. Far less time spent on belt maintenance and on conveyor belt replacements. All conventional conveyor belts will have to be replaced before the overland conveyor belt needs replacing. 8. There is no need for a crane to lift counterweight boxes multiple times per year to maintain belts because the overland conveyor has an automatic winch takeup in lieu of a gravity take- up. 9. There are more control device replacements with conven- tional system. 10. Conventional conveyor systems require multiple drive con- figurations, which leads to different sizes of gearboxes, motors and couplings. Single-flight curved conveyor utilizes the same drive and VFD. 11. Conventional conveyor systems require more types of spare belting for emergencies and more regular belt replacements due to those belts traveling through takeup pulleys more often and being loaded more frequently. 12. Conventional conveyor systems require more spare idlers and idler replacements as they have approximately double the number of idlers. 13. Conventional conveyor systems require more spare scraper blades and skirtboard rubber adjustments and replacement. 14. Conventional conveyor systems require far more spare electrical components, including safety switches and lights for transfer points.

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