The filling material is broken shale , and the particle size is 0-40 mm. The sand was stored in a sand pot and the sand was unloaded with a 1.5 m 3 bottom dump bucket. Size of sand pot: 10m in diameter and 7m in depth. The bottom of the warehouse is a positive conical shape with a slope of 45° at the bottom and a volume of 240 m 3 in the silo. One mixing groove section is 6m long and the sand injection chamber is 15m long. The length of the mixing trench section is insufficient, as shown in Figure 1.
1 Lake manganese ore sand basin well forward
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