3 results about "Pumice" patented technology

The utility model relates to the technical field of mining equipment, in particular to a mine pumice stone cleaning device. The device comprises a traction guide device, an equipment box body, a sweeping disc and a plurality of groups of sweeping assemblies, a vertical motor is fixedly mounted in the equipment box body, the traction guide device is fixedly mounted at the top of the equipment box body, and the guide hole and the traction hole are formed in the traction guide device; the output end of the vertical motor is connected with a sweeping disc, and a plurality of sweeping assemblies are fixedly installed on the sweeping disc. The mine slope pumice stone and the unstable loose rock stratum can be cleaned without large mechanical equipment and manpower, the construction efficiency is high, the safety risk is low, the method can be applied to cleaning of all mine slope pumice stones and unstable loose rock stratums, and the application and popularization value is good.

An insulating material comprising a porous material selected from the group consisting of expanded pearlite, vermiculite, pumice stone and expanded glass beads, modified with silica aerogel, wherein the silica aerogel is embedded within pores of the porous material.

The present invention relates to a hybrid filter unit (2) comprising a housing (4) having an inlet (6) for the inflow of a fluid to be purified and an outlet (8) for the outflow of the purified fluid. The hybrid filter unit (2) further comprises a wall structure (16) disposed inside the housing that defines a fluid mixing chamber (18), the wall structure defining an internal cross-sectional area that decreases at least partially in the direction from the inlet (6) to the outlet (8). The hybrid filter unit (2) further comprises a nozzle (14) disposed to supply an oxidizer to the mixing chamber (18), thereby exposing the fluid to the oxidizer as it flows between the inlet and the outlet and allowing it to react with the oxidizer. The hybrid filter unit (2) further comprises a filtration structure (74) disposed between the inner wall surface of the housing and the outer wall surface of the wall structure, the filtration structure comprising volcanic pumice (78), and the wall structure (16) is at least partially adapted to the flow of fluid from the mixing chamber (18) to the filtration structure (74).