The production process of spiral chutes in coal bunkers is introduced. Gravity beneficiation is widely used in metal and non-metallic ore beneficiation due to its small environmental pollution and low cost. The fiberglass chute is one of the gravity separation equipment, with a structural feature of a cubic parabolic cross-section, suitable for handling finer particle sizes of -0.2mm. During the sorting step, there is no need to add flushing water, and the fine, medium, and tailings are segmented at the bottom of the chute. 2、 Use a method to make the fiberglass chute stand up, align it with the vertical line, use an iron frame or wood to stabilize it in a suitable direction, and use a sand pump to send the ore sand to the top two inlet ports of the spiral. The ore sand slurry enters to increase water and adjust its density. The mineral slurry naturally swirls from top to bottom, and an inertial centrifugal force occurs in the rotating inclined flow rate, resulting in differences in gravity, particle size, and shape of the sand ore, By separating the ore from the sand through the influence of the gravity and centrifugal force of the swirling flow, the concentrate enters the beneficiation hopper and is piped out. The tailings enter the tailings hopper and are piped to the sand tank, which is then discharged by a mortar pump, completing the entire beneficiation process. The production process of coal bunker spiral chute is 
III. Features: 1. Stable sorting steps and easy operation. 2. Allowing for a large range of feed densities. 3. Very high enrichment ratio and high recycling probability. 4. Small land occupation and low water consumption. 5. Simple structure and no power required. 6. Large processing capacity. 7. Easy installation and operation. 8. Low investment and quick results. The production process of coal bunker spiral chute is based on the particle size of the processed ore, Chutes can be divided into three types: (1) coarse particle spiral chute, the maximum Granularity of ore feeding is more than 2-3 mm, and the maximum can be 100-200 mm. (2) Sand ore chute, processing 2-3mm Granularity mineral aggregate. (3) Slurry chute, feeding particle size less than 0.074 millimeters. The production process of spiral chutes in coal bunkers 5. Application field: Spiral chutes are used for processing 0.6-0.03mm or vein ores and minerals, but high mud content is unfavorable for sorting. It has now been widely used for processing iron, tungsten, sand tin, tantalum niobium mines, beach or river sand mines, and sand gold, among others. Manufacturing process of the spiral chute in the 
coal bunker
