Special equipment for gold ore dressing - tower type grinding machine

Grinding machine is actually immersed tower tower mill (i.e., vertical stirred ball mill), a new use in particular gold in the mineral industry, in recent years by the Institute of Metal (hereinafter referred to as Metal Research) Successful development and utilization, and obtained invention patents.
Using the tower type grinding machine to adopt the new technology of edge grinding and immersing carbon adsorption and gold extraction, one step of grinding, two-stage grinding, spiral grading and leaching in the current carbon slurry process can be carried out in the tower type grinding machine. Completion; gold leaching time is shortened to 15min; equipment investment is reduced by 20% to 25%; construction area of ​​grinding and immersing operations is reduced by more than 50%.
Tower mill using immersion dip edging machine, and the like to strengthen the alkali leaching process of the new invention patents, mainly under normal temperature and pressure of the arsenic-containing, sulfur-containing refractory gold pre-oxidation, of gold economical, less investment, The cost is low, the gold recovery rate is 93%~98%, and the pre-oxidation cost is 150~400 yuan/t. Gold is particularly suitable for small and medium sized ore dressing plant and leaching easily removable Smelting Plant (CIP substituted or zinc powder).
The mill can economically grind ore to more than 90% -400 mesh, and is suitable for secondary grinding, fine grinding of sulfide ore and secondary recycling of tailings. The total cost of grinding grade is 9~15 yuan/t.
The working principle of the tower type grinding machine is shown in Fig. 1. It mainly adopts: 1 low-speed rotary stirring type pulverizing; 2 medium up and down circulating pulverizing; 3 medium extrusion grinding type pulverizing; 4 internal gravity grading pulverizing.
The characteristics of the tower type grinding machine are as follows: (1) It can treat arsenic-containing and sulfur-containing refractory gold ore at normal temperature and pressure, the arsenic conversion rate is 92%~95%, and the gold leaching rate is 93%~98%; the process is the same as the carbon slurry. The law is basically the same. The 50t/d scale carbon slurry plant adopts the technical transformation investment of this method to be 1 million to 1.5 million yuan; if the new plant is built, the equipment investment of the pre-oxidation-cyanide whole gold extraction process is 2 million to 2.5 million yuan, and the production low cost. Compared with the roasting, autoclave oxidation and bacterial oxidation methods, the investment saves 700.6, and the total cost is saved by 40%; 2 high efficiency and energy saving, strong grinding ability, 50% energy saving than the traditional horizontal ball mill, and the finer the grinding, the more energy saving Large; 3 can be edged and immersed, the gold leaching time of the easy-leaching gold mine is shortened to 15min; 4 ball consumption is saved 1 times, the liner consumption is saved 3~5 times, the wear parts have long life; 5 shutdown and restart performance is superior, Can be stopped for any length of time to restart; 6 can be finely ground or superfine grinding to 1 ~ 37μm. For the easy-leaching gold mine, the edge immersion immersion process can increase the gold leaching rate by 2%~10%; 7 the vibration is small, the noise is low, the noise is less than 80dB; 8 the installation foundation is simple, the basic cost is only 1% of the equipment cost about.
At present, the tower type grinding machine is mainly produced by the Metal Research Institute. The model and production capacity are shown in Table 1. The main technical parameters of the pre-oxidation mixing tank are shown in Table 2.
Shenyang Shixian Technology Co., Ltd. (hereinafter referred to as Shenyang Xianke) also produces such equipment, but the specifications are few, it is a small and medium-sized equipment, its model and production capacity are shown in Table 3, the characteristics are as follows: 1 low energy consumption, horizontal Ball mill energy saving more than 50%; 2 high crushing efficiency, large volume per unit volume; 3 product particle size can be adjusted in the range of 74~1μm, the design of the classification zone is reduced by over-grinding; 4 the crushing medium has an orderly rolling, less collision, and the amount is saved; High performance, good safety, all moving parts work under low load condition, and are not exposed; 6 realize pulverization, stirring, activation, separation operation simultaneously, improve gold leaching rate; 7 low noise, low vibration, small basic size , easy to install and maintain; 8 horizontal ball mill with overall input and operating costs are less than the same processing capacity.
The JM series vertical spiral mixing mill (also known as tower mill) successfully developed by Changsha Mining and Metallurgy Institute was originally used as a fine grinding or ultra-fine grinding equipment. In recent years, the institute also used it as a side grinding edge of gold mine. Dip equipment, and has the various features described above. The technical parameters are shown in Tables 4 and 5.
Lyl1M series large-scale super-fine agitating mill is the structural feature of comprehensive absorption tower mill, agitating mill, stripping machine and sanding machine. It uses the research results and experience technology of super-fine grinding equipment for decades in Changsha Mining and Metallurgy Institute. A new type of high-efficiency large-scale superfine grinding and grinding equipment jointly developed by a company that has long been engaged in the manufacture of mechanical equipment . It has passed the appraisal of Science and Technology Department of Hunan Province and has reached the advanced level in foreign countries and has applied for national patents.
    Figure     Table 1   Table 2   table 3   Table 4, 5

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