UHMWPE composite pipe in the tailings conveyor application
Summary of ultrahigh molecular weight polyethylene pipes used that meet the long-range transport of water isolated mine tailings pump needs, full of ultra high molecular weight
polyethylene pipe "energy, environmental, economic and efficient" superiority.
1, the need for transformation of tailings transport
Laiwu Steel Group Lunan Mining Co., Ltd. (formerly Shandong Han Wang iron) ore processing capacity of 750,000 tons of tailings conveyor concentration was 17.5%, transport
capacity of 460,000 tons of dry ore. 2001 years ago, transporting tailings using five pumping stations and transmission distance of only 2.3Km; 1 # ~ 4 # Pumping 4PNJ sand pump,
each pump 3 sets, 2 sets of work, a spare. 5 # 2 100ZJ Slurry Pumping, a work desk, a spare. 2 # ~ 5 # pumping station installed power of 627Kw, during normal operation, start
the power 487.5Kw. Tailings pipeline of three, two work, a spare, using mainly ¢ 200mm cast iron pipe, this pipe has been badly worn. Worn tailings pipeline submerged farmland,
causing tension between workers and peasants, things have occurred. Thus, the company behind the tailings transportation technology, outdated equipment and high energy
consumption, maintenance, trouble. In response to this reality, my company tailings system has been modified.pallet conveyor
2, the main equipment and piping options
2.1 The main equipment selection
Tailings transport trends is a high concentration, high lift, long distance. At present, China has used a high concentration of water pump isolated slurry pump, slurry and so
on. Water Isolation slurry pump slurry transportation of Shenyang Institute of the University of the patented product, which is an advanced country tailings conveying equipment,
its outstanding feature is the high delivery pressure up to 4.5Mpa, long distance transport, low energy consumption easy operation and maintenance, now has more than 20
manufacturers use. Comprehensive comparison I am using mine water pump to do the main isolation device.
2.2 Pipeline choice
After a comprehensive investigation and analysis argument, use of ultra-high molecular weight polyethylene (UHMWPE) composite pipe as a conduit.
Ultra high molecular weight polyethylene pipe is an integrated performance of the new plastic pipe can be used for a variety of high corrosion resistance, high adhesion, high
wear of the gas, liquid, powder or liquid mixture delivery. Such as various acids, lye, crude oil, refined oil, tailings slurry, power plant ash, slag and other transportation,
alternative difficult to meet the requirements of the traditional metal
Pipes. In strong corrosion and high wear conditions life is 4-6 times of steel, in the long distance transport of materials in high-stress, work pressure can be used in more
than 3Mpa plastic composite pipes. It also has excellent resistance to environmental stress cracking resistance, resistance to rapid crack ability, electrical insulation
resistance, fatigue resistance, high temperature creep resistance, antistatic, absorb noise, non-absorbent, light weight, easy installation, excellent performance, full of the
use of ultra high molecular weight polyethylene pipe "energy, environmental, economic and efficient" superiority.
3, the transformation plan and design specifications
3.1 transformation program
The main plant beneficiation tailings pond was concentrated concentrated transported by a pump station # 1 to # 2 pumping stations, transported to the tailings pumping station #
2 first enter the multi-gradient magnetic separator selected in the mine, the remaining part of the gravity to converted pumping station. Isolated by the water pump and ultra
high molecular weight polyethylene mineral composite pipes once delivered to the tailings dam.
After transformation, taking into account the delivery pressure (1.64Mpa), long distance transportation, pipeline pressure greater losses, after comparing ultra-high molecular
weight polyethylene pipe liner tube of plastic composite pipe (hereinafter referred to as composite pipe ), the pipeline has a friction resistance, abrasion resistance, impact
resistance and other advantages. Specific programs are as follows:
(A) keep a # pumping station (due to check mine needs) all the equipment, remove the two # ~ 5 # pumping station.
(2) use of the old factory converted a pumping station, using two groups of water isolated slurry pump, a work desk, a spare, a second will be transported to the tailings dam.
(3) a new tailings pipeline pumping station from the original ¢ 200mm cast iron pipe) shall be changed to 2 ¢ 273mm composite pipe, with two groups of water pump isolated form
two separate mine tailings conveying system, a job, a the alternate.
3.2 Design of the main technical indicators
Concentration of 20% of tailings, tailings density 2.91t/m3, conveying dry ore 65.82t / h, conveying slurry volume 286.6m3 / h, transmission distance 2km, vertical transport
height 95m. After calculations, design conveyor lift 164m, use 230KW water pump for the power source.