There are many types of washing equipment. Commonly used are cylindrical washing machines, screen scrubbing machines, tank washing machines, and hydraulic washing screens. In addition, many screening equipment (such as fixed screens, roller screens, vibrating screens, etc.) and spiral classifiers can also be used as mineral processing equipment. The concentrator (or crushing screen plant) should consider setting up the washing operation under the following conditions: (1) When processing the ore containing more mud and containing water, it is easy to block the mine silo, chute, funnel and crushing and screening equipment, affecting normal production. Going on. (2) For some ores, the ore can be removed by washing, and the useful minerals are enriched and qualified products are obtained. For example, some of the deposition of manganese ore, apatite, iron-rich ore and limestone and the like. There are many types of washing equipment. Commonly used are cylindrical washing machines, screen scrubbing machines, tank washing machines, and hydraulic washing screens. In addition, many screening equipment (such as fixed screens, roller screens, vibrating screens, etc.) and spiral classifiers can also be used as mineral processing equipment. The choice of washing equipment and its throughput depends mainly on the washability of the ore. The washability of the ore can be assessed according to indicators such as clay plasticity index, washing time, specific energy consumption and washing efficiency. The relationship between the washability of ore and the use of washing equipment is shown in Table 1. Table 1 Relationship between ore washability and optional washing equipment 1. Cylinder washing machine (also known as cylinder washing machine) This equipment is used for washing and screening operations and is suitable for the treatment of easily washable and medium washable ores. The mesh size can be as small as 8mm and up to 50mm, and the cylinder screen is installed obliquely. The equipment has simple structure, easy maintenance and management, and stable work, but the handling amount per unit area is small, the effective working sieve surface is small, the screening efficiency is low, and the screen surface is easy to wear. The equipment is widely used in pre-selection operations on gold mining vessels. The mesh size can be equal to the diameter of the mesh, and the difference can be used (the difference in the size of the mesh from the feeding end to the discharge end of the product on the screen). There are high pressure flushing water pipes, material blocking rings and lifting plates. The large mesh cylinder washing machine for limestone mining is often used in combination with a tank washing machine for two-stage scrubbing. The first stage uses a cylindrical washing machine, and the second stage uses a tank washer to scrub the product under the screen. The processing capacity of the cylinder washing machine can be calculated according to the formula: q=110KaKLR3ntga (1) Where q - cylinder washing machine processing capacity, t / h; Ka—the effective area influence coefficient of the mesh, selected according to Table 2 and Table 3; KL - the influence coefficient of the length of the screen hole, see Table 4; R——tube sieve radius, m; A——the inclination angle of the cylinder screen, (°); N——tube rotation number, r/min Table 2 The ratio of the effective area of ​​the mesh to the area of ​​the sieve plate (Aa/A) and Ka relationship Table 3 Relationship between mesh size and Aa/A Table 4 The ratio of the length of the sieve segment to the diameter of the sieve (L/D) and KL See Table 5 for examples of cylinder washing production. Table 5 Production examples of cylinder washing machine Second, with a screen scrubber The screen scrubber consists of a closed cylinder and a double cylinder screen attached to the end of the cylinder. The slurry is soaked in water in the cylinder and collides and rubs against each other during the rotation to dissociate the clay and the ore. At the same time, the high-pressure water is introduced to wash the slime; the slurry is passed through a double-layer sieve to divide the material into coarse, medium and fine three grains. Grade, fine particle product combined with washing overflow. The equipment has high washing efficiency and can complete the double tasks of washing and sieving at one time. It is suitable for medium washable and difficult to wash ore, but it is not suitable for processing ore with less ore and mud. See Table 6 for the operating conditions and treatment capacity of a concentrating plant with screen scrubbing. Table 6 Operating conditions and throughput of a washing machine with a screen Third, trough type washing machine (also known as trough scrubber) The device is similar in construction to a spiral classifier, except that the blades are discontinuous blade shapes. It has the function of cutting and scrubbing the material, and has strong effect on the small mud group. It is suitable for the treatment of difficult-washed ore with medium grain size and more mud. The equipment has large processing capacity and high washing efficiency, and is suitable for processing materials below 75mm. The flushing water pressure is required to be 147~196kPa. The production example of the tank washing machine is shown in Table 7. Table 7 Production example of tank washing machine Fourth, hydraulic washing sieve (also known as hydraulic washing or water gun - strip screen) Hydraulic wash griddle suitable for processing with mud pie and more difficult to wash ore, tin ore sand mining water is used more often washing water transport facilities. See Table 8 for the technical parameters and operating conditions of the hydraulic washing screen of a slope sand and tin ore dressing plant in Yunnan. Table 8 Technical parameters and operating conditions of hydraulic washing screen The grid sieve, the rod sieve, the roller screen and the vibrating screen can be used as a washing equipment after being equipped with a pressure flushing water pipe, and is suitable for treating ore having a small amount of mud and a weak cohesiveness. The spiral classifier can be used to de-sludge and dewater the fine-grained products discharged from the washing machine. Its fragmentation effect is not strong, and it is not suitable for the treatment of ore with large mud and large viscosity.
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Busch Vacuum Pump Filter Element Industry Filter ,Busch Vacuum Pump Filters,Vacuum Exhaust Filter,Busch Vacuum Pump Filter Element Xinxiang Tianrui Hydraulic Equipment CO.,LTD , https://www.filterelement.pl Ore category Clay property Clay plasticity index K Necessary washing time / min Unit power consumption
/kW·h·t -1 Washing efficiency /
t·kW -1 ·h -1 Generally available
Washing equipment Easy to wash ore Sandy clay 1~7 <5 <0.25 4 Vibrating screen washing Medium
Washing ore Clay can be shredded on the hand 7~15 5~10 0.25~0.5 2~4 Cylinder washing machine or trough scrubber, wash once Difficult to wash ore The clay sticks into a mass and is difficult to rub on the hand. >15 >10 >0.5~1.0 1~2 Wash with a trough scrubber or a hydraulic scrubber in combination with a scrubber 
(A a /A)/% 6 10 14 18 twenty two 26 30 K a 0.2 0.32 0.44 0.56 0.68 0.84 0.96 Punching size / mm 8 10 12 14 16 18 (A a /A)/% 17.1 18.2 21.3 22.2 23.4 24.6 L/D 0.2 0.8 1.0 0.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 K L 0.16 0.64 0.72 0.8 0.84 0.88 0.9 0.92 0.93 0.94 0.95 0.96 0.97 Factory name Equipment specifications / mm Screen hole / mm Ore content /% Feeding size / mm Processing capacity
/t·h -1 Washing efficiency /% Remarks Wulongquan
Limestone mine 22200×6500 50 6~12 45~230 150~180 ~98 Ship rock
Gray stone mine 22200×7000 45 266 140~200 Design indicator Yanmeishan tungsten mine 15001500×4250 18
25 ~11 116 89.05
82.99 project unit Numerical value Simplified size, inner diameter × length Mm 1120×3620 Barrel size, long
Sieve Mm
Mm 1070
Inner layer; 25, outer layer; 5 Installation power kW 22.5 Processing capacity t/d 600~700 Feeding maximum particle size Mm 100 Washing particle size limit Mm 2.0 Overflow - 2mm content % 80~85 -2mm content in sand % 5~10 Washing efficiency % 80~85 Factory mine Equipment specifications / mm Feeding size / mm Processing capacity
/t·h Net mine overflow grade/% Mud/% Water content /% Upper limit particle size / mm Yield/% grade/% Huangmeishan Iron Mine 101070×4600 80~0 20 47.29 0.5 0.2 10 Mashanyu Iron Mine 101070×4600 80~0 7.5 41.0 1.0 49.17 31.06 Beigong Iron Mine 101070×4600 50~0 15 50.0 10~30 Bayi Manganese Mine 101070×4600 75~0 19~22 <5 13.5 1.0 Taochong Iron Mine CXK1600×7630 30~0 55 34 2.5 11.8 0.9 1.76 23.1 Huangmaoshan Concentrator 15001500×6660 50~0 33~46 2.0 water gun Micro-slant screen Oblique screen Overflow screen Caliber/mm Pressure / MPa
(kg/cm 2 ) Length × negative / mm Screen spacing / mm inclination) Length × width / mm Strip screen
/mm inclination) Length × width / mm Screen gap / mm 30 1~1.2
(10~12) 30001×3000 30 3.5 6000×3000 30 twenty one 2000×100C 30 Waste stone screen Operating condition Length × width / mm Screen spacing / mm inclination) Processing capacity
/t·h -1 Feed concentration /% Feeding mine maximum particle size / mm 3000×1000 30 45 300×400 20~30 200~300
Selection and application of washing equipment