Scrap mica

Hard and tough Mica Scrap and powdered metals Jaw crushers Gyratory crushers Cone crushers Autogeneous mills Ball, pebble, rod and cone mills Tube mills Vibration mills Ball, pebble and cone mills Tube mills Vibration and vibro-energy mills Fluid-energy mills Moh s hardness 5-10, but includes other tough materials of lower hardness... 

Scrap mica - The term scrap is a holdover from the days when sheet was the major mica product. It is basically mica that is insufficient in size or quality to qualify as sheet. Scrap is produced at mines and at sheet mica factories. Scrap mica can be a byproduct of sheet mica mining or of the recovery of other minerals or the sole product of a mine. Factory scrap is the trimmings from sheet mica. Scrap is the source for ground mica products, which today account for more than 95% of all mica sold worldwide. 

Fig. 1. Flow sheet for conventional scrap mica washer plant. See text.

In 1990, North Carolina produced 60% of the total scrap mica the remainder was produced in Connecticut, Georgia, New Mexico, Pennsylvania, South Carolina, and South Dakota. In 1991, the five largest producers produced 67% of the nation s total output (Table 9) (15). 

S. D. Broadhurst and L. J. Hash, The Scrap Mica Resources of North Carolina Bulletin No. 66, North Carolina Department of Conservation and Development, 1953, p. 6. 

Selective dissolution of the polymer may be used industrially to separate polymer from additives for recycling purposes. However, separation of PPE from its additives (CB, talc, mica) in integrated circuit board scrap by means of trichloroethylene would not seem to meet industrial requirements (toxicity, cost) [10]. 

Flake or Scrap Mica. In the early to mid-1900s. Hake or scrap mica was mainly processed hy a jigging procedure which consists ol hydraulically washing a pile of bulldozed ore across a series of roll crnsliers and Trommel screens gaped at iliffercnl size openings. 

The largest producer of mica is Russia, which produces about one-third of the world s annual supply of 300,0001. The United States produces about 75,0001 of scrap and flake mica each year. Although historically the United States was a producer of sheet mica, domestic reserves have declined to zero and commercial production is all scrap and flake. 

Hedrick, J,B, (1990) Mica (natural), scrap and flake, mineral commodity summaries, US Geological survey, January 2009 accessed at www.minerals,usgs,gov,... 

Mica paper - Mica paper is a fabricated alternative to natural sheet and built-up mica products. Scrap mica is delaminated through a combination of thermal, chemical, and mechanical treatments. The mica pulp is then processed on a papermaking machine into a continuous, homogeneous sheet of imiform thickness. 

Flake mica - Flake mica is essentially nonfactory-generated scrap mica. It is recovered by flotation from mica ores, from which quartz and feldspar are also generally separated and recovered, or as a floated byproduct during the beneficiation of feldspar, kaolin, or lithium-bearing ores. 

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