The copper concentrate is dewatered in three stages, and the final moisture is 5~7%. The product is directly sent to the smelting factory concentrate bin by a belt conveyor.  Comparison of process indicators before and after low-calcium and low-medication methods for dyed ore project Copper selection index, % Sulfur selection index, % Pharmacy consumption, kg/t α β ε α β ε Ding Huang Yao No. 2 oil lime Before using low calcium and low medicine ( 1970~1979 ) 0.677~ 1.015 11.845~ 18.882 83.743~ 91.439    0.135~ 0.220 0.054~ 0.098 8.29~ 16.26 After using low calcium and low medicine ( 1979~1984 ) 0.886~ 1.641 16.739~ 27.125 90.437~ 95.693 5.1~ 12.8 39.40~ 43.47 73.41~ 86.37 0.075~ 0.145 0.017~ 0.049 8.39~ 11.85 Both Screws SGP-VB Standard Nipple Both Screws Nipples,Vb Standard Nipple,Both Screws Pipe Fittings,Male Thread Steel Nipple SHAOXING OGAWA PIPE CO.,LTD. , https://www.sxogawapipe.com
The zinc concentrate is dewatered in three stages, and the dried products are separately stored and exported.
There are three ways to dehydrate the sulfur concentrate: 1) Three stages of dehydration, the dried product is sent directly to the smelter acid system. 2) Dehydration in two stages, product storage and export. 3) The sedimentation tank is naturally dehydrated and stored in an export. The three methods are mainly two-stage dehydration, and the other two can be used flexibly.
White silver-copper beneficiation plant is an old factory, has a wealth of experience in dealing with copper ores of copper pyrite type of plant in a large number of research and production practice, explore some effective methods .
1) Dip-dyed ore low-calcium and low-medicine copper, tailings and acid-selective sulfur. After 1979, due to the imbalance of ore production, this method was adopted in the production of single-dip-dyed ore, that is, under the conditions of low calcium (containing 50 g/m 3 of calcium oxide) and low-yield (containing 30-50 g/t of xanthate). Copper concentrate, copper tailings only need to add a small amount of sulfuric acid to lower the pH to below 7, and then select the sulfur concentrate. In the past, single-dip-dyed ore was treated under high-calcium and high-medication conditions, and copper tailings were discarded. Sulfur could not be recovered. After using this method, the sulfur recovery rate is over 73%, and the copper concentrate grade and recovery rate are improved, the chemical consumption is reduced, and good economic benefits are obtained. The comparison of indicators before and after is shown in the table below.
2) Sulfur is selected from tailings. Before 1979, the amount of tailings discarded after the treatment of copper was selected to be about 30 million tons, and the tailings contained an average of 9.58%. In order to recover this part of the resources, a sulfur removal facility of 1.5 million t/a was built in 1985. The process is as follows: the shovel shovel puts the tailings accumulated in the No. 1 tailings dam on the train, transports it to the selection plant, and uses 4 sets of Pinggui IV-150 water gun to make the slurry, and the slurry flows into the Ñ„50m concentrated surface. Mud, dehydration, concentrated product into flotation, JJF-16 flotation machine for coarse, sweeping, JJF-8 for selection, through a coarse, a thick, one sweep to obtain qualified sulfur concentrate. The sulfur selection measure can produce 300,000 tons of sulfur concentrate per year.
3) In 1977, the company jointly developed an online X-ray fluorescence analyzer and an electronic pulse counting dosing device. Online X-ray fluorescence analyzer ensures continuous measurement of copper, zinc, lead , iron and other elements in raw ore, concentrate and tailings in production, and can automatically time, set, detect and analyze, and instantly reflect on TV screen. result. This has promoted the production management and stabilized production indicators. However, due to the problem of the slurry transportation circuit, it cannot be used continuously. Compared with the mechanical dosing device, the electronic pulse counting dosing device increases the dosing adjustment range and reduces the error, thereby improving the operating conditions of the pharmaceutical worker, and basically realizes the unmanned operation.
Silver copper ore dressing plant (2)
Bulk copper zinc ore pyrite grinding two-stage system, the two hierarchical, prioritized classification overflow float, copper rougher concentrate after regrinding copper, zinc separated rougher Tailings, zinc election The tailings are sulfur concentrates. The grinding process and indicators are shown in the figure below.