pebble mill

pebble mill

[′peb·əl ‚mil]
(mechanical engineering)
A solids size-reduction device with a cylindrical or conical shell rotating on a horizontal axis, and with a grinding medium such as balls of flint, steel, or porcelain.

Pebble mill

A tumbling mill that grinds or pulverizes materials without contaminating them with iron. Because the pebbles have lower specific gravity than steel balls, the capacity of a given size shell with pebbles is considerably lower than with steel balls. The lower capacity results in lower power consumption. The shell has a nonmetallic lining to further prevent iron contamination, as in pulverizing ceramics or pigments (see illustration). Selected hard pieces of the material being ground can be used as pebbles to further prevent contamination. See Tumbling mill

References in periodicals archive ?
A NEW private hospital to be built at the former BBC studios at Pebble Mill is set to be even bigger than originally planned.
Council officers concluded the hospital would be a 'welcome addition' to Pebble Mill forming another part of the 'growing medical park.'.
An artist's impression of the new hospital planned for the site of the former BBC studios in Pebble Mill, Birmingham.
Kay Alexander presenting Midlands Today Kay Alexander presenting Midlands Today Countryfile presenter John Craven Countryfile presenter John Craven AS the Mercury's sister newspapers, the Birmingham Post and Mail launch a campaign calling for more BBC investment in the Midlands, we take a look at some of the great programmes made at the famous old Pebble Mill studios in Edgbaston.
6 Who presented the tribute programme Goodbye Pebble Mill At One ...
Or Pebble Mill At Five as his pensioner audience will call it.
He accused AWM of favouring a rival pounds 100million science park at the old BBC Pebble Mill studios in Birmingham, which he described as a "shadow" of its Ansty rival.
TV appearances include Children's ITV, Sooty with Matthew Corbett, Pebble Mill, The Quest, Talk of the Town, The Afternoon Show and The Pyjama Party with Claudia Winkleman.
The Boliden autogenous grinding technique is a two-stage system consisting of a primary autogenous mill and a secondary pebble mill. The AG mill commonly has a length/diameter ratio of from 1.5-2:1, making it very different from AG mills used, for example in iron ore plants in North America, where the L/D ratio is about 0.5:1.
A new private hospital and research institution is set to be built on the site of the former BBC studios at Pebble Mill.
The Bupa Care Home is being built on the site of the former BBC studios at Pebble Mill, Edgbaston, and will have 62 bedrooms.
I would like to know what is happening to all these demolished building sites which make Birmingham look like a longterm building site - the old ATV studios site on Broad Street, the old Pebble Mill Studios site in Edgbaston, a big hole next to the TUC building on Broad Street.