The correct placement of the sampling points is the key to ensuring the representativeness of the ore samples. The sampling designer should comprehensively study the geological conditions of the deposit, according to the complexity of the ore nature, the spatial distribution of ore of different ore types and industrial grades, and the representativeness, number and granularity of the ore samples in mining and ore dressing tests. The specific requirements of the weight, and considering the sampling construction conditions, etc., determine the number and location of the sampling points reasonably. Generally, the following points should be noted: (1) The sampling points should be distributed in various parts of the ore body and should not be too concentrated. Sampling points should be arranged along the ends and middle of the ore body and in the shallow and deep directions along the inclined direction. At the same time, the main reserves should be taken care of. Without affecting the representativeness of the ore sample, the arrangement of the sampling points can also focus on the mining area in the early stage of the deposit. (2) When selecting sampling points, consideration should be given to the different ore types and industrial grades, and to take into account the general characteristics of the material composition and ore properties of various types and industrial grade ores, and should also be based on the occurrence of associated components. Distribution characteristics, taking care of the content of associated components and mineral types. (3) The number of sampling points should be as much as possible. For deposits with complex grade changes, a certain number of spare sampling points must sometimes be considered. (4) The existing exploration and mining engineering should be fully utilized, and the most complete engineering point for the ore type and the grade of the industry should be selected as the sampling engineering point. Surface sampling points should be arranged in exploration projects such as trenches and shallow wells with natural outcrops and well-preserved or restored workloads. The deep sampling points should be placed in the exploration boreholes with mineral (rock) cores. When the ore quality changes greatly, the sampling points in the existing projects are limited, and it is difficult to guarantee the remuneration of the samples, or the construction tunnels are not constructed. It is necessary to adopt a large number of extended continuous tests, semi-industrial tests and industrial tests. In the case of mineral samples, special sampling points should be arranged in conjunction with prospecting or mining. (5) The surrounding rock sampling points of the top and bottom of the ore body shall be placed within the range of the contact with the ore body and the thickness of the surrounding rock during the mining. (6) Construction and transportation conditions should be considered when selecting sampling points. Under the premise of not affecting the representativeness of the ore sample, select the location with good construction and transportation conditions as the sampling point. (7) The remaining cores and cores of the test samples taken during geological exploration are valuable geological exploration results and should be fully and effectively utilized. However, in the calculation and sampling of the samples, it is not allowed to take all the saved cores and core samples, and only half of them can be taken as test samples. The remaining half should be properly preserved and kept for geological exploration, mineral processing tests, and mine samples for mine production. As an important form of Centrifugal Pump, double suction pump is widely used in engineering because of its high lift and large flow. The impeller of this pump type is actually a combination of two back-to-back impellers, and the water flow from the impellers merges into a volute. The double-suction pump has the following characteristics: it is equivalent to two single-suction impellers of the same diameter working at the same time, and the flow rate can be doubled under the same outer diameter of the impeller; the pump casing is horizontally opened, which is convenient for inspection and maintenance. The inlet and outlet of the suction pump are in the same direction and perpendicular to the pump shaft, which is conducive to the arrangement and installation of the pump and the inlet and outlet pipes; the impeller structure of the double suction pump is symmetrical, there is no axial force, and the operation is relatively stable. Double Suction Pump,Double Suction Centrifugal Pump,Double Suction Water Pump,Carbamide Pump Jiangsu Qiantu Trading Co., Ltd. , https://www.jsqtpumptrade.com