1. lightweight portable machine Amoy gold gold machine is the technical and economic research center developed by the Ministry of Geology and Mineral Resources according to the production characteristics of our gold dust, especially for gold placer sorting, to other high density minerals such as wolfram, tin sand, also has a good Sorting effect. It can replace chute and manual panning to improve sorting efficiency and reduce labor intensity. It has been widely used in field geological surveys, small gold mining and mining, heavy sand separation in laboratories, and can also be used for the selection of coarse concentrates on gold mining vessels.
The sorting principle of the gold panning machine: in the inclined sorting disc, the ore particles with different density and particle size are subjected to the action of friction, centrifugal force, gravity, medium buoyancy, hydrodynamic force, medium resistance and the force of the sorting tank to generate circulation. Movement, the formation of greater looseness, the density of the minerals to settle down, the light minerals continue to move upwards, resulting in stratification, and then discharged by water and other effects, become concentrates and tailings.
The structure of the gold rushing machine is shown in Figure 1. It consists mainly of brackets, sorting discs (the spiral direction is opposite to the real object), overflow pallets, tilt adjustment knobs, water spray pipes, electric motors, reducers, etc. There are hand and foot devices for the pedals.
In 1985, the LP-500 gold panning machine was first developed. In order to further improve the processing capacity, according to the production practice experience, the TG-1000 gold panning machine was successfully developed in 1987. The model name and main technical performance are listed in Table 1.
The main features of the light gold rushing machine are: 1 recovery rate is as high as 95%~97, and the enrichment ratio is large; 2 small, light, easy to operate, movable; 3 has been serialized, there are hand-type, pedal-type, diesel Transmission type and AC electric type. If there are more pebbles in the river, an electric vibrating screen can be equipped to remove large pebbles. There is also a laboratory type capable of speed regulation, suitable for geological laboratories; 4 wide range of treatment granularity, +0.074~-l00mm; 5 province water saving, 0.54kW/h per ton of ore, water consumption 1~2t ;6 There are two types of single disc and double disc, the processing capacity of the double disc is twice as large as that of the single disc.
2. Centrifugal disc sorting machine Centrifugal disc sorting machine is a new type of gold re-election equipment developed by China according to foreign technology. In recent years, various types have been developed and applied in some gold mines.
The Φ900 centrifugal disc sorting machine developed by Changchun Gold Institute is used in the Zhongzhongzhongzhong gold mine in Inner Mongolia, with good results. The main body of the machine is a disc shaped like a pot, which is supported and rotated by a hollow shaft. The slurry is fed to the center of the selection by the mining hopper, and the ore particles are simultaneously subjected to gravity and inertial centrifugal force. During the upward movement of the ore particles along the center of the disk surface, when the angle is greater than 45 degrees, the centrifugal force component gradually becomes smaller along the slope direction, and the gravity component gradually increases. When rising to a certain height, the two forces reach equilibrium. A heavy sand deposit is easily formed near the equilibrium point. The tailings are discharged from the upper edge of the disc, and the concentrate is discharged from the spherical valve through the hollow shaft after stopping the flushing of the ore.
The working process of the Φ600mm conical centrifugal disc developed by Kunming Metallurgical Research Institute, the gold panning machine produced by Ningde Gravity Selection Plant and the disc sorting machine developed by Guangxi Metallurgical Research Institute and the flat-bottom spiral washing pan made in the United States are basically as described above. .
(1) Structure and technical parameters of the centrifugal disc sorter. The main body of the centrifugal disc sorting machine is a semi-spherical disc, which is lined with rubber annular grooves, followed by a frame, a transmission, a sand control cover and a tailings trough. The structure is shown in Figure 2.
It is a device that works on a periodic basis. The ore is stopped once every 20 minutes of operation, and the concentrate deposited in the annular groove in the selection tray is washed out with water, and then the equipment is restarted to continue feeding.
The main technical parameters of the centrifugal disc sorting machine are: diameter 960mm, speed 120r/min, production capacity 5m 3 /h, water consumption 25m 3 /h, feed time 20min, motor power 1.5kW, weight 0.98t.
(2) Structure and technical parameters of the gold panning machine. The centrifugal disc sorting machine jointly developed by Ningde Gravity Selection Plant and Central South University of Technology and produced by Ningde Gravity Selection Plant has two types, single disc and double disc, respectively, which are also called single pot gold panning machine and double pot gold panning machine. Its structure is shown in Figure 3. The gold pan as a sorting part is made of FRP. The technical parameters of the gold rush machine are listed in Table 2. The device is simple in structure, light in weight, easy to relocate, has low equipment investment, stable and reliable work, high enrichment ratio and ideal recovery rate. Its disadvantage is that it works intermittently.
3. Washing the pan The panning disc produced by Qunying is also called the mobile disc sorting machine.
The structure and dimensions of the panning tray are shown in Figure 4. It is an annular container made of steel plate with two layers of concentric walls. There is a steel plate bottom between the annular containers, and a vertical shaft passes through the center of the disk and is supported by upper and lower bearings. A horizontal arm is mounted on the vertical shaft, and some fixed teeth are regularly mounted on the arm, and the rotation of the teeth is performed by the motor to drive the vertical shaft.
The sorting process of the panning tray is: after a certain concentration of pulp is fed into the tray in a tangential direction, under the continuous rotation of the molars, a suspension is first formed, wherein the heavy mineral is under the action of centrifugal force, gravity and molar thrust. It quickly gathers at the bottom and the periphery to form a self-generated, temporarily stable resuspension. The density of this suspension determines whether a certain density of minerals can be easily accessed. The sorting density of the suspension is outward from the center of the disc, gradually increasing from the top to the bottom, and there are sorting zones of different densities. Light minerals, regardless of particle size, are difficult to enter the area of ​​high density of the suspension (bottom of the panning tray), only suspended on the surface of the slurry, and discharged into the tailings overflow weir under the hydrodynamic pressure of the ore stream. Heavy minerals and gold deposits enter the panning tray and the rotating caries are collected at the concentrate discharge.
The apparatus is mainly used for roughing except placer gold, may be more useful minerals recovered diamond, cassiterite, cinnabar, titanium, iron ore from the sands. It can be used to replace the jig, which not only improves the recovery rate of gold, reduces the production cost, but also creates conditions for comprehensive recovery of heavy sand.
The main technical performance of the JXP-Φ3600 mobile disc sorter produced by Qunying is listed in Table 3.
In addition, there is a panning tray with a diameter of 4200mm, a depth of 650mm, a number of teeth of 8×7=56, an effective selection area of ​​12.32m 2 , a feeding size of -25mm, a feed concentration of 13%, and a processing capacity of 30. ~40 t / h, power 22kW, external dimensions 4650mm × 4250mm × 2350mm, machine weight 8t.
4 . STL type water jacket type gold selection machine STL type water jacket type gold selection machine is a centrifugal ore dressing equipment developed and produced by Changchun Gold Institute. It applies to gold, gold and veins monomer gold recovery polymetallic ores, mercury substituted plate operation, but also copper, gold from gold flotation concentrate and flotation concentrate for sorting gold free gold, gold mining from Gold is recovered from the tailings of the ship selection plant.
The hospital has been developing this equipment since 1985 and has produced four models. The ore dressing test proves that the recovery rate of gold is above 99%, especially when recovering the monomer gold in the vein gold ore. When the grinding particle size is less than 0.074mm, accounting for 65%, the recovery rate of monomer gold can reach 98% or more. The recovery rate of monomer gold for 0.04 mm is over 97%. The drainage period is 1~4h, and the enrichment ratio can reach 1000 times. The technical parameters are shown in Table 4.
   figure 1  figure 2  image 3  Figure 4
   Table 1  Table 2  table 3  Table 4
HDPE Winding Structure Pipe
HDPE Winding Structure Pipe
The performance characteristics of the HDPE winding structure wall tube are as follows:
1. The hot state of winding forming welding joint quality is high.
The flat material belt and U-shaped material belt extruded from the mouth die of the extruder in the melting state are evenly wound on the heated roller die according to the predetermined position, which ensures the quality of the fusion joint of the structure wall tube. In particular, in the structural design, the melt joint of the flat material belt is covered by a polyethylene-coated supporting tube, which improves the overall resistance to the external pressure of the product.
2. Good connection quality.
The pipe connection with excellent installation performance adopts the
embedded electric fuse in the socket with the same material socket welding
connection technology. It can achieve zero leakage, ensuring the same life span of the pipeline system and the safety of operation. At the same time, because the product under the condition of the same application as other tubes light weight, and is easy to transport, construction is convenient and quick, and can reduce the construction cost, in the range of applications, without a concrete cushion layer and concrete jaasiel groove can directly apply the tube after qualified, basically, stay do under excavation, side tube, while backfilling, simplifies the construction procedures, shortening the time limit for a project. During the project acceptance, the closed-air test is used instead of the closed-water test, which not only speeds up the acceptance but also saves the complicated work and a lot of test costs in the closed-water test
3. Good flexibility
High-density polyethylene winding structural wall pipe has macro flexibility, and the micro pipe section has strong rigidity and overall resistance to external pressure.
when used under heavy load road surfaces, it can ensure the safety of traffic. Due tothe flexibility of the pipe, it can also reduce the damage loss of the pipe to the minimum in the event of an earthquake, uneven surface settlement, and other geological activities. These characteristics improve the seismic mitigation ability of public facilities.
4. HDPE can be recycled, The main raw material of winding structure wall pipe
is green environmental protection products, such as high-density polypropylene, which doesn`t have any toxicity. There is no dye in the production process. The used pipeline can be 100% recycled. It is a green product of environmental protection.
5. Corrosion resistance, aging resistance, and service life span can be up to 50
years.
High-density polyethylene has the ability to resist chemical corrosion and
erosion. Therefore, when the winding structure wall pipe is conveying corrosive fluid or laying in corrosive soil, it does not need anti-corrosion treatment, and its performance is much better than other pipes. The product in the design process, chooses a reasonable product structure form, to ensure the service life span of the plastic pipe is more than 50 years, and no maintenance is needed in the life span.
6. Tube inner wall roughness, large water transfer around the structure of the
wall tube. Product inner wall roughness N is about 0.010, so the transmission of fluid has lower friction, compared to other products such as cement pipe with a similar diameter the water transfer is greatly improved. Therefore, the smaller HDPE tube can replace the larger cement pipes. In application, under the same conditions, using a wall pipe winding structure can have better reliability compared to the traditional pipe material. The comprehensive benefit is obvious, especially in the narrow construction site, high building density, underground pipeline, complicated traffic busy roads, and acid soil.
Hdpe Winding Structure Pipe,Hdpe Drainage Pipe,Spiral Hdpe Krah Pipe,Hdpe Double Wall Krah Pipe
Hebei Taiwo Plastic Pipe Co.,Ltd , https://www.taiwocarattube.com
