- The Gjers system is not applicable to small ingots or " billets," 1 because they lack the inner surplus heat of large ingots; indeed, they are now allowed to cool completely.
Morgan's Continuous Heating Furnace for 2-inch billets 30 ft.
Brought from above G to C, Pusher, for forcing billets forbetween N by a flue not ward.
Billets are pushed forward.
E, Magnesite bricks on which the M, The escaping products of comhot billets slide forward.
With successively cooler and cooler billets, A-F, and finally with quite cold ones, of consequently great heat-absorbing capacity.
As soon as a hot billet A is withdrawn by pushing it endwise out of the exit door B, the whole row is pushed forward by a set of mechanical pushers C, the billets sliding on the raised water-cooled pipes D, and, in the hotter part of the furnace, on the magnesite bricks E, on which iron slides easily when red-hot.
To lessen the loss in shape of " crop ends," and for general economy, these billets are in some cases 30 ft.
It is to make it wide enough to receive such long billets that its roof is suspended, as here shown, by two sets of iron tie-rods.
19; but this would probably recover less heat than the continuous system, first, because it transfers the heat from flame to metal indirectly instead of directly; and, second, because the brickwork of the Siemens system is probably a poorer heat-catcher than the iron billets of the continuous system, because its disadvantages of low conductivity and low specific heat probably outweigh its advantages of roughness and porosity.
How economical the methods of mining, transportation and manufacture have become is shown by the fact that steel billets have been sold at $13.96 (£2, 17s.
He produced another opera, the Testament et les billets-doux (1819), which was no better received than the former.
If they regretted having to retreat, it was only because they had to leave billets they had grown accustomed to, or some pretty young Polish lady.