Introduction of river gold dredger
About river gold dredger
River gold dredger also called river gold dredger ship/vessl is a set of mineral processing&gold mining equipment, including mining, mineral processing and water system, waste rock and tailings disposal system, deck machinery, ship, steel, a basic system of power supply.
Gold is mainly concentrated in the sand mixed layer bottom bed, to go through several sets of programs will be sand and gold panning and separation. At present the main use of the water with a gold mining tool is the gold mining ship, gold mining ship through professional design, large-scale gold mining ship is also equipped with a special gold automatic cleaning device, can be directly up to 80% purity with jacket centrifuges, belt chute, chute, joint operations recovery rate is up to more than 95%.
Technological process
First of all, the river sand mining system from the water bed out of water, and then enter the screening system for screening, more than 10mm (according to the actual situation of the design of sieve size) stones into the tailing tank, the tailings discharged from the system to the gold mining ship away from the place, to ensure that the gold mining ship was not silt, can work continuously less than 10mm. The material from the guiding groove into the gold mining system of Jinsha separation, according to the proportion of the difference between sand and gold, gold ore than the major settlement on the bottom, a small proportion of sand and other materials floating in the upper layer with water discharged into the tailings slurry discharge system.
1. floating bodies. The floating body generally do body composition form, the two sides of the floating box, separated by a certain distance, which can increase the stability of the gold mining ship, and easy to disassemble and transport equipment. The floating body length is according to the design depth of dredging, dredging depth is large, floating body longer. The width of float design the body is according to the working weight design, in general, the greater the workload, the floating body is wide.
2. mining system. Mining system of gold dredger is composed of dredging bucket and chain bucket type mining, shot and Straw ejection and suction type sand pump composition, mining form cutter and sand pump is composed of a cutter suction and other installation, according to the experience of many years, due to the large proportion of gold, mining chain bucket form over shoot suction and the cutter suction.
The 3. screening system. The screening system also has a variety of forms, more clay ore, with a roller sieving effect is good, the mud is appropriate, recommend the use of vibrating screen, if the size of ore stones less than 10mm, can be omitted. Screening system
4. gold mining system. Gold mining system has fixed chute, chute, sleeve type centrifuge, water automatic washing machine spiral chute, shaker, the application of automatic washing machine is chute + + water jacket centrifuge form, this form has the advantages of simple structure, small volume, easy to move, large capacity, high degree of automation and the enrichment ratio (1000:1), the net rate reached more than 95%, is currently the gold mining ship in gold mining equipment can be selected.
Main technical parameters
1, the excavation depth of 5-15 meters (ordinary type), 15-40 meters (special type)
2, the amount of mining 100-200 tons per hour (regular type), 200 tons -600 tons per hour (special type)
3, the power of 70-150KW (common type), generator optional Weichai, Yuchai, Cummins.
Operation and maintenance
After many practices and improvements, the gold dredger has a high degree of automation and is easy to learn and operate. Each class needs only 2 people to operate:
1, before starting the first of the entire mechanical drive system and machine oil checked, and then start the pull back conveying diesel engine, with the pull clutch, start engine, slowly moving loose clutch, the speed adjusted properly. Then launch diesel bucket front zipper.
2, two after starting the diesel engine. The speed raised the need for speed. Then release the brake arm. Slowly it down, other than the sand hopper 2/3, to stop decentralization, until 1/3 and funded under the arm. When the big arm and the water into a 45 degree angle (5 meters). Should be parked arm. When the sand in the hopper to control how much traction, when forward to see how much sand in the bucket and fixed, forward and backward to be flexible in case of mechanical sand cave strenuous work or pull to loosen the rope, the ship backward until it stops digging. Such as underwater encounter a large stone or mud layer, the ship will be severe vibration phenomenon, it should be The filed dredging arm, then avoid obstacles.
3, work should pay attention to the following points:
After the new machine or overhaul, should run in 24 hours, before the normal operation
(1) according to the geographical situation, advance, retreat and lift the big arm. The movements should be flexible. If there are big stones and mud in the hopper, they must be cleaned up
(2) always check the chain screws, pins and transmission system each fixed point, fasteners must be firm
4, when stopping, the sand in the hopper should be less than 1/2. The big arm should be brought up slowly until the four corners of the water are exposed to the surface of the water. There is no sand in the hopper, then the former diesel engine will be stopped and then the diesel engine will be stopped
5, in case of high winds (5 or more) should be temporarily shut down, so as to avoid failure, overhaul or replacement parts should be shut down work, so as to avoid personal injury accidents
6, maintenance: during use should always check the various parts of the screw and often filling oil and maintenance, especially the hopper screw and chain pin, four water wheels and 500 angle reducer butt plate bolts must be tightened and other ministries intact. Underwater square wheels, with where you often add butter, lubricating oil, flood or lockout, the boat should be tied firmly or drive it away to avoid losses.