Refining ore

Usage examples of smelting.

Ores of Lead -- Geographical Distribution of the Lead Industry -- Chemical and Physical Properties of Lead -- Alloys of Lead -- Compounds of Lead -- Dressing of Lead Ores -- Smelting of Lead Ores -- Smelting in the Scotch or American Ore-hearth -- Smelting in the Shaft or Blast Furnace -- Condensation of Lead Fume -- Desilverisation, or the Separation of Silver from Argentiferous Lead -- Cupellation -- The Manufacture of Lead Pipes and Sheets -- Protoxide of Lead -- Litharge and Massicot -- Red Lead or Minium -- Lead Poisoning -- Lead Substitutes -- Zinc and its Compounds -- Pumice Stone -- Drying Oils and Siccatives -- Oil of Turpentine Resin -- Classification of Mineral Pigments -- Analysis of Raw and Finished Products -- Tables -- Index.

The sample is taken wet as it arrives at the smelting house, and is assayed direct.

Suppose we know the capital and operating costs for bauxite mining, alumina production and aluminum smelting in the twentieth century.

That it does not do so in the ordinary way of working is shown by the fact that a button of silver equal in weight to the silver lost in cupelling may be got by smelting the cupel and cupelling the resulting button of lead.

On the following morning Pentaur and Nebsecht were fettered together with a copper chain, and when the sun was at its height four pairs of prisoners, heavily loaded with copper, set out for the Oasis of the Amalekites, accompanied by six soldiers and the son of the paraschites, to fetch fuel for the smelting furnaces.

Had the false clicks been random, they would have caused the zinc torus to wobble on its way to smelting, or recognizably wrong information about its function to have been applicable to dielectrics instead of conductors, say, which would have given the Snowflake pause and made it ask again.

Miss Chine acquired any great knowledge of smelters and smelting methods?

Despite the fiercest penalties, the little gold ingots keep disappearing from the smelting laboratory and floating through Auschwitz, a strange secret currency for perilous deals.

Scrap can be "demagged" by smelting the scrap in the presence of a flux, and a chlorinating or fluorinating agent (liquid chlorine, aluminum chloride, aluminum fluoride).

And this brings us to the establishment of the Coalbrookdale works, where the smelting of iron by means of coke and coal was first adopted on a large scale as the regular method of manufacture.

There seems to be some doubt as to the precise time when pit-coal was first regularly employed at Coalbrookdale in smelting the ore.

It was used as an alloying element with copper to make brass, but the ores were mixed before smelting to make brass directly, or zinc ore was mixed with copper before casting and copper was actually used to reduce the zinc!

The initial smelting was done in an adjacent blast furnace equipped with a pair of huge water-powered bellows.

He learned the methods of collecting bog iron, of smelting, casting, forging, hardening and tempering.

The use of charcoal was gradually given up as the art of smelting with coke and brays improved, most probably aided by the increased power of the furnace-blast, until at length we find it entirely discontinued.