. Mining and Scientific Press . ow copper 4—15 ..1 ... Ladle to receiver 1— 0 ... 1(1 ? Mineous delays 1—30 . ... Total 20—30 Matt torn 148 Matte, copper. % Tuyeres .11 Tons blister ...4110 Bars of 216 Tons per 2 42 Standard 2 41 Ratio t 0% Each converter is equipped with a mechanical record-ing device by means of which the elements of time andposition are automatically indicated on a chart. The dialon which this chart is mounted revolves by clock-work;the position of the converter on its axis is recorded bymeans of a pencil. It is therefore possible to obtaina
. Mining and Scientific Press . ow copper 4—15 ..1 ... Ladle to receiver 1— 0 ... 1(1 ? Mineous delays 1—30 . ... Total 20—30 Matt torn 148 Matte, copper. % Tuyeres .11 Tons blister ...4110 Bars of 216 Tons per 2 42 Standard 2 41 Ratio t 0% Each converter is equipped with a mechanical record-ing device by means of which the elements of time andposition are automatically indicated on a chart. The dialon which this chart is mounted revolves by clock-work;the position of the converter on its axis is recorded bymeans of a pencil. It is therefore possible to obtainabsolutely reliable data for the first column in the report, September 17 1921 MINING AND Si II \ I II |. PR| irrespective of possible neglect or deliberate deceit on thepari of the operators. It bas onnd thai from a is i copper should be blown per Ifrom ??;-. matte. tons; from -Hi;, matte, tons;and from 5095 matte, 1 inns. From charge 2951, forinstance, tons was blown ;i< against standard:. The blister opper, is casl in a Btraighl line conveyor type machine, Ingots n itfa a maxi-mum weight of 460 lb. are delivered onto an inclinedapron-conveyor i! 9 them through a vat of cool- ing-water and finally deposits them on the weighingfloor. The molds Bre casl of copper, these being a greatimprovement over the former ironmolda They last only a few months,but since thej are made cheaply ofblister, and when worn are simpl)throw 11 bach into the converters alongwith the scrap, they are highly 1 cocomical. Secondaries, ini luding shells andskulK from the ladles and com rtera1 spilled material, are loaded intostandard steel railway-cars by meansan orange peel buckel and are returned to the reverberatories for r ?smelting. Below are the results of convertingoperations during the last sis monthsof 1920. M lit. converted ;«-r month, tons 0271 Copper content, Co 80 8 COPPEB-REC1 IVEB EQ1 D7PED WITH POWDERED-COAL BUSKERS therebj making the < fficiency of op-era
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