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.

The Y-strainers are installed in water systems to filter out pebbles and other impurities that could damage the equipment. They are designed with focus on easy maintenance and low head loss.Y Strainer take their name from their configuration. PSL Y Strainers are cast in sizes DN15-DN500 with Threaded,Flanged End connections. Strainer are your most economical choice for large debris removal. They are most commonly used in pressurized lines, gas or liquid, but can also be used in suction or vacuum conditions. Y-Strainer has the advantage of being able to be installed in either a horizontal or vertical position. However, in both cases, the screening element or "leg" must be on the "downside" of the strainer body so that entrapped solids can be properly collected and held for disposal.