Thermit flame was rising from two places in the very thick of the mob.
In a close-knit, flame-spitting group, the knot of men raced over fallen bodies and hurtled areas where the pavement had cooled to no more than a dull-red heat where a thermit shell had struck.
A big flier burst into the weird bright flame of the thermit fluid.
The thermit flowed in all directions, seeming to grow in volume as it flamed.
Steam guns in the towers, thermitprojectiles from the cannon far away: now this.
One of the flame weapons flew to bits, spouting what seemed to be liquid thermit upon friend and foe alike.
No result--but beyond the city walls showed a flash of thermit flame.
It will be observed that the thermit process is essentially like the ordinary blast furnace process of smelting iron and other metals except that aluminum is used instead of carbon to take the oxygen away from the metal in the ore.
Then the "hydrogenite," as the mixture is named, is ignited by a hot iron ball and goes off like thermit with the production of great heat and the evolution of a vast volume of hydrogen gas.
The large truck in the foreground contains loaded shell] For smaller work thermit has two rivals, the oxy-acetylene torch and electric welding.
A crucible filled with the thermit mixture is set up above the joint and the thermitignited with a priming of aluminum and barium peroxide to start it off.
Goldschmidt made use of this reaction in his thermit process.
During the warthermit found a new and terrible employment, as it was used by the airmen for setting buildings on fire and exploding ammunition dumps.
The German incendiary bombs consisted of a perforated steel nose-piece, a tail to keep it falling straight and a cylindrical body which contained a tube of thermit packed around with mineral wax containing potassium perchlorate.
Two crucibles each containing 700 pounds of the thermit mixture are seen on the sides of the vessel.
They weighed about forty pounds apiece and were charged with oil emulsion, thermit and metallic sodium.
This plant produced 31 tons in one day] [Illustration: Courtesy of the Metal andThermit Corporation, N.
The applications of the thermit process are innumerable.
The development of thermit grenades was still in the experimental stage when the armistice was signed.
Finally, in the seventh class were the thermit grenades, built of terneplate and filled with a compound containing thermit, which develops an intense heat while melting.
It carries a charge of thermit ignited by this piece of magnesium ribbon.
The amount of thermit required is calculated from the wax used.
The wax is weighed before and after filling the entire space that the thermit will occupy.
To this quantity ofthermit should be added I per cent of pure manganese, 1 per cent nickel thermit and 15 per cent of steel punchings.
The process, which is controlled by the Goldschmidt Thermit Company, makes use of a mixture of finely powdered aluminum with an oxide of iron called by the trade name, Thermit.
The number of pounds of wax required for this filling multiplied by 25 will give the number of pounds of thermit to be used.
Half a teaspoonful of ignition powder is placed on top of the thermit charge and ignited with a storm match or piece of red hot iron.
Thermit Mould Construction] Three or more openings are provided through this moulding material by the insertion of wood or pipe forms.
The thermit process, of which so much has been heard, and which is briefly dealt with later, is the fusion welding of iron and steel by means of the intense heat produced by the combustion of a special chemical compound.
Thermit is an aluminium alloy whose combustion generates so much heat that the substance can be used for the welding of iron and steel.
Either black or red thermitwill do the trick equally well, however.
Believe me, they have known about thermit as long as I have.
In 1908 Goldschmidt invented the thermit process of welding; thermit being a mixture of aluminum with some metallic oxide such as oxide of iron.
Another and a more interesting reason is that gray iron melts in a much lower temperature than does thermit steel and consequently has a lower shrinkage.
Also thermit is used in the same way with a small amount of titanium oxide, to purify iron and steel.
After spending a few minutes in seeing how the inventor of this process came to discover it, we will take a little trip in our mind's eye to some of the places where the thermit process is in use, and see what happens.
This "thimble" also is made of magnesia stone, and has a hole through it for the molten thermit steel to run through after the reaction has taken place.
Thus the makers of thermit call the pure metal that results from the combustion, thermit steel.
The thermit steel does not touch the pipes, but merely supplies the heat to weld them perfectly, so that they are as strong as the piping itself.
Of the pure metals that can be reduced by the thermit process there are chromium, which is 98 to 99 per cent.
As the scientists say, the thermit steel has united the broken sternframe and formed a homogeneous mass with it.
Outside of that, however, thethermit process and the autogenous welding process attain the greatest known heats.
The jewels usually are too small for any commercial purpose but serve as a very striking example of the intensity of the thermit fire.
Another interesting thing about the slag from chromium thermit is that small rubies have been found in it.
The third system is a mixture of the joining by plates and the thermit process.
He might have used thermit or an oxyacetylene blowpipe for all I would care.
But there is no hole," objected Kennedy, "not a trace of the use of thermit to burn the way in or of the oxyacetylene blowpipe to cut a piece out.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "thermit" in a variety of sentences. We hope that you will now be able to make sentences using this word.
