What regulations should be followed in the post-filling mining method?

1. The post- filling mining method can be used for mining deposits where the surface needs to be protected or the column needs to be recovered after the mining is carried out by the segment mining method, the segmental empty field mining method and the stage empty field mining method;
2. Filling should be carried out with high efficiency filling method; when the pillar needs to be recycled, the filling body should have sufficient strength and self-standing height;
3. When the filling body needs to provide the ore channel or the bottom column for the adjacent ore block to be recovered, the bottom of the filling body should be filled with high-ash sand than the cement, and the filling body strength should be greater than 5 MPa ;
4. When the pillar does not need to be recycled as a permanent loss, the goaf should be filled with non-cemented;
5. Before the stope is filled, the drain pipe should be arranged in advance in the stope, and the lower passageway should be constructed with a stable filter wall.

Impeller normally applied in the centrifugal pumps.

Impeller is a rotating component equipped in the Pump Housing, help to transfer to energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation.

QFAP supply various kinds of impellers to all over the world, main of our customers are from Europe, North America, Japan and Southeast of Asia.

 Impeller

Materials: grey Iron, ductile iron, steel castings, aluminum die castings, etc.

Surface treatment: painting, zinc plating, passivation, nickel plating, anodizing, polishing, etc.

Heat treatment: according to customer`s requirement.

 

QFAP have specialized in producing high precision Agriculture Parts more than 10years, Because of the long term cooperation, we could supply our customers not only the products but also our recommendation on the designs to saving costs.

Impeller

Boat Impeller,Fan Impeller,Oil Pump Impeller,Blower Impeller

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