It consists of a horizontal steam-chest under which is placed a number of elements arranged side by side over the fire, the whole being enclosed in an iron casing lined with firebrick where it is exposed to the direct action of the fire.
A set of firebrick baffles is placed so as to cover rather more than half of the spaces between the upper of the two bottom rows of large tubes, and another set of baffles covers about two-thirds of the spaces between the upper small tubes.
Instead of a water space at the back of the chamber, doors lined with firebrick are fitted.
Where the furnace charge is basic the firebrick should, generally speaking, be basic or aluminous and not siliceous, i.
The wearing out of a firebrick used in the construction of furnaces, &c.
It is evident that no particular kind of firebrick can be suitable for all purposes, and the manufacturer should endeavour to make his bricks of a definite composition, texture, &.
The furnace consisted of a flat, rectangular, firebrick box, packed with a layer of finely-powdered charcoal 2 in.
The central space of the furnace was filled with a mixture of corundum, coarsely-powdered charcoal and copper; and an iron lid lined with firebrick was luted in its place to exclude air.
Should the bath be heated regularly every day, a firebrick furnace is certainly the best, as such furnaces retain their heat a long time.
Adjoining is the laconicum with a firebrick furnace, after the nature of that of which I have before given full detailed drawings.
The open-hearth, as it is termed, is a huge rectangular chamber of firebrick with a firebrick roof, and doors along one side just under the roof through which the process can be watched and new materials be added from time to time.
The refuse is always damp, and often wet, and after being put into the cells is gradually dried by the heat reflected upon it from the firebrick arch of the cell, before it descends to the furnace.
The straw burners are provided with a firebrick arch in the firebox.
When built of stone or hard-burned brick, the back and sides are often not lined with firebrick, but it is better to use firebrick laid in fire-clay.
When a grate for burning coal or coke is built in, firebrick at least 2 inches thick should be added to the fireplace back unless the grate has a solid iron back and is only set in with an air space behind it (fig.
Slacked-lime putty may be used in place of hydrated lime; firebrick is best laid in fire-clay.
If firebrick is to be used or the exposed breast is to be of face or special brick (or ceramic tile) the number should be counted or estimated and deducted from the number of common brick as estimated above.
They are generally placed on edge, however, forming a 2-inch protection, in which case metal ties should be built into the main brickwork to hold the 2-inch firebrick veneer in place.
The crown of each cell is formed of a reverberatory firebrick arch having openings for the emission of the products of combustion.
When refuse is to be fed into the furnace the lever is thrown over, the contents of the hopper drop on to the sloping firebrick hearth beneath, and the door is at once closed again.
The firebrick cover is occasionally useful to retard cooling, if, by reason of local obstructions, some little delay is unavoidable in transferring the balls from the fire to the water of the pyrometer.
H is the cover, with a firebrick lining; and I is a false cover of firebrick, 1 in.
They have firebrick furnaces, you understand, sir, with an alternating current of 5000 volts between water-cooled copper electrodes.
I am now heating the little firebrick furnace," said the scientist.
Metal lattice work may be fastened or laid in the top framework and used to support a layer of firebrick bound together with a mixture of one-third cement and two-thirds fireclay.
The piece being welded is braced and supported on this table with pieces of firebrick so that it will remain stationary during the operation.
