Gold River magmatic nickel metal liquation copper-nickel sulfide deposit, mine is divided into four, wherein 76% of the total reserves DEPOSIT, a mine 16%. Currently has two beneficiation plant, a processing plant dealing with a mine ore processing plant a second election, two ore mine. The second plant was designed by Beijing Nonferrous Metals Design and Research Institute in 1964 and has a scale of 6000t/d. Since the beneficiation index of the first selection plant is comparable to that of the second selection plant, some data of the selected plant are included in this section. I. Ore properties: The ore bodies in the second mining area are divided into three types: ultrabasic rock type, metasomatic type and penetrating type. Among them, No.1 and No.2 ore bodies with superbasic rocks are the largest, accounting for the total reserves of the second district. 99%. The facies of the ultrabasic rock mass are concentric shell-like distribution, the core is rich in ore, the outer part is rich ore, the periphery is ultra-basic or basic surrounding rock, and some are directly in contact with gneiss and marble . The surrounding rock is dominated by Erhui peridotite . Each facies has a small amount of sulfide. Metal sulfides pyrrhotite, pentlandite, chalcopyrite, followed by well-chalcopyrite, pyrite, chalcopyrite ink, purple sulfur pentlandite, a small amount mackinawite. The metal oxides are magnetite, chrome spinel, hematite, etc., and the content is small. Gangue minerals olivine, some of which have been serpentinized olivine, pyroxene followed, with minor carbonate and the like plagioclase. According to the industrial grade, the ore in the second mining area can be divided into three types: lean ore, rich ore and special rich ore. The lean ore is dominated by a star-like structure, the rich ore is dominated by a sponge-like iron structure, and the extra-rich ore is dominated by a massive structure. Metal sulfides of sponge iron structure are formed as aggregates composed of pentlandite, pyrrhotite and chalcopyrite. The aggregate particle size is 1 to 5 mm. The sulfide aggregate is tightly packed between the olivine particles and has a clear boundary with the gangue mineral. The size of the nickel pyrite is generally 0.05 to 1 mm, but a small portion is flamingly embedded in the magnetite, and the particle size is generally less than 0.01 mm, which is difficult to separate. Chalcopyrite particle size is generally 0.1 ~ 0.5mm, a small part of 1 ~ 3mm, there are also a small amount of fine particles. The pyrrhotite has a coarser particle size, 90% of which is above 0.1 mm. In addition to the main metal minerals such as pyrrhotite, pentlandite and chalcopyrite, the ore is accompanied by metals such as gold, silver and platinum . Among them, gold and silver have a great affinity for chalcopyrite and are enriched in copper concentrate. Platinum group elements are mainly present in the form of nickel pyrite solid solution, so most of the platinum group elements are concentrated in the nickel concentrate, and in addition, there is a small amount of nickel and precious metals in the pyrrhotite. The second ore-rich ore has a Platts hardness of 10 to 14, a density of 3.08 t/m 3 , a loose density of 1.89 t/m 3 , a rest angle of 38°, and an ore water content of 5%. Second, the process: the second plant was originally treated in the western part of the mining area, and in 1983 began to deal with the rich ore in the second mining area. The second plant has two crushing series, four grinding series and two dewatering series. The first and second series of grinding and floating treatment of the poor ore in the mining area have a treatment capacity of 2000-3000 t/d; the third and fourth series are used to treat the rich ore in the second mining area with a treatment capacity of 3000 t/d. This section mainly describes the production status of the bonanza system. The second ore dressing and ore-concentrating system is divided into three sections, one closed circuit, stage grinding, stage flotation, concentration and filtration. The copper nickel concentrate drying operation and the desulfurization of the sulfur concentrate are all located in the smelting plant. Due to the good floatability of chalcopyrite and pentlandite in the rich ore of the second mining area, the copper-nickel mixed flotation can be carried out without adding the activator copper sulfate in the rough copper and nickel concentrate operations, which can be used in natural ph medium. The natural flotation sequence of sulfides is selected to overcome the disadvantages of preferential flotation to activate-suppress-reactivate the useful metals, thereby reducing the amount of inhibitors and activators. The process is mixed flotation after two stages of grinding to obtain copper-nickel concentrate. The mixed tail re-grinding and copper sulfate activated pyrrhotite re-election, and the coarse concentrate is dehydrated and then added with a small amount of copper sulfate to obtain a low-nickel high-sulfur concentrate, which is used as a vulcanizing agent for smelting the depleted electric furnace. The process flow is shown in the figure below. The sulfur concentrate in the picture is not produced for the time being, and is indicated by the dotted line. The rich ore in the second mining area is hard and difficult to grind. The grinding size is required to be fine. In order to avoid over-grinding of the ore and increase the graded overflow concentration, the grinding process of rod grinding, ball milling and cyclone classification is adopted. The first stage of the plant has been using a hydrocyclone for the grinding grade. In order to stabilize the cyclone, the sand pump is equipped with a hydraulic coupling to adjust the speed, and has accumulated some experience in the operation and management of the hydrocyclone. The process indicators and unit consumption indicators of the first and second plant selections in the past year and the main equipment of the second plant (including the lean and rich systems) are shown in the following table: Unit consumption index (by raw ore) Name Xanthate Ding Huang Yao No. 2 oil Copper sulfate Sodium carbonate Ammonium black medicine sulfuric acid Steel ball Steel rod water Electricity Unit Kg/t Kg/t Kg/t Kg/t Kg/t Kg/t Kg/t Kg/t Kg/t M 3 /t Kw.h/t Quantity Second selection plant (rich mine) 0.18 0.07 0.17 0.003 0.013 1.47 0.74 6 43.5 Second plant (poor mine) 0.11 0.03 0.06 0.15 0.66 0.4 5.4 37 First plant 0.19 0.11 3.3 0.1 1.44 6.2 49.2 Note: 1. The second-concentration plant rich ore system does not produce pyrrhotite for the time being; 2. Water consumption includes return water. The amount of water returned is 30% of the total. Major equipment Serial number Equipment name and specifications unit Quantity Remarks 1 3500╳2100 jaw crusher Overflow type 1 Rich ore and lean system sharing 2 22100 standard cone crusher station 1 Ibid. 3 22100 short head cone crusher station 2 Ibid. 4 11750 standard cone crusher station 1 For mining system 5 11750 short cone crusher station 2 Ibid. 6 1800╳3600 self-centering vibrating screen station 7 2 of them are used in the rich ore system 7 22700╳3600 rod mill station 4 2 of them are used in the rich ore system 8 22700╳3600 overflow ball mill station 9 4 of them are used in the rich ore system 9 22100╳3000 overflow ball mill groove 2 For mining system 10 7A flotation machine groove 96 Lean mining system 11 6A flotation machine station 114 72 tanks for the rich ore system 12 BX-8 flotation machine station 80 For mining system 13 3030m thickener station 5 Copper-nickel concentrate 14 1515m thickener 3 One for sulfur concentrate, two for mine dehydration in rich ore system 40m 2 folding belt filter station 6 Copper-nickel concentrate 15 20m 2 fold belt filter station 2 Sulfur concentrate 16 112m 2 blade filter station 2 Copper-nickel concentrate sea water pump,High Quality sea water pump,sea water pump Details Botou Honghai Pump Co.,Ltd , https://www.gearpump.nl
Equipment selection of Jinchuan Nickel Mine Second Plant