- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
Steel rope suspended in a vertical shaft to prevent excessive swinging of the cages or skips. Eight rope guides are generally used for the shaft, four for each cage, and two additional rubbing ropes are installed to prevent possible collision between the cages or skips. The ropes are suspended from girders fixed on the safety hook catch-plate platform and kept taut in the shaft by means of weights in the shaft bottom sump. The clearances between the cages, and also between the cage corners and the shaft wall, should be about 12 in (30.5 cm).
Industry:Mining
Steel sections of various forms, made esp. to resist bending, that are used in place of wooden spiles in forepoling.
Industry:Mining
Steel sideplates that overlap a conveyor belt slightly and assist in settling the coal on the belt at the tail end or at a transfer point.
Industry:Mining
Steel that has been given a normalizing heat treatment intended to bring all of a lot of samples under consideration into the same condition.
Industry:Mining
Steel that has been hardened and subsequently tempered by a second lower heating.
Industry:Mining
Steel that has been hardened by quenching from or above the hardening temperature.
Industry:Mining
Steel that has been processed beyond the stages of billets, blooms, sheet bars, slabs, and wire rods, and is ready for the market.
Industry:Mining
Steel that is incompletely deoxidized and contains sufficient dissolved oxygen to react with the carbon to form carbon monoxide to offset solidification shrinkage.
Industry:Mining
Steel treated with a strong deoxidizing agent, such as silicon or aluminum, to reduce the oxygen content to such a level that no reaction occurs between carbon and oxygen during solidification.
Industry:Mining
