Copper industry

“ Lack of labor, inability of new properties to obtain railroad connections, and absence of government encouragement to prospecting, have retarded the copper industry since August, 1914. Aside from former German control based on selling and refining contracts, all Australian copper mining is and has been under British control. The properties are owned by British and Australian capital and present refining and selling arrangements will prevent the German metal companies from again getting any foothold in the field. ”

“ The electrical industry is the largest consumer of copper. The manufacture of brass, bronze, and other copper alloys constitutes another chief use for the metal. Considerable quantities of copper sheets, tubes, and other wares are used outside of the electrical industry, as for instance in roofing, plumbing, and ship bottoms. Copper is also used in coinage, particularly in China, where it is the money standard of the working population.
The average grade of all copper ores mined in the United States in recent years has been about 1.7 per cent metallic copper. ”

“ Because it can be worked so easily. You see a small box of that stuff can be packed on a mule any distance and then shipped, and if a different [Pg 162] point is used each time no one knows where it comes from and there is no competition. Now copper, you see, is only valuable in large quantities, and it needs a big industry to run it. And of this rarer sort of stuff, there's lots of it around for any one that wants to look for it. ”

“ The increased consumption of copper is perfectly explained by our knowledge that the last decade has been a period of great electrification and of great expansion in the use of the telephone. Moreover, the automobile manufacturing industry has become a great consumer of copper, about 15 per cent of the consumption in 1922 having been for that purpose. The increased consumption of zinc is explained partially in the same way, for zinc as a constituent of brass is used extensively in connection with copper. ”

“ The copper was, no doubt, recognised as a malleable rock, differing from all others in its ductility, so that it could be fashioned, with the aid of a hammer-stone, to any desired form. By this means the ancient miners of Lake Superior provided themselves with the most suitable tools for their mining operations, and were probably the manufacturers of most of the widely diffused copper implements. But for general purposes, both of industry and war, American man had to be content with the more abundant chert, hornstone, and quartzite. ”

“ The Fusion of Ores in Reverberatory and Cupola Furnaces.—After the ore has been partially calcined, it is smelted to extract its earthy matter and to concentrate the copper with part of its iron and sulphur into a matte. In reverberatory furnaces it is smelted by fuel in a fireplace, separate from the ore, and in cupolas the fuel, generally coke, is in direct contact with the ore. When Swansea was the centre of the copper-smelting industry in Europe, many varieties of ores from different mines were smelted in the same furnaces, and the Welsh reverberatory furnaces were used. ”

“ The best interests of the industry are more nearly those of the miner than of the refiner. Therefore, the most positive dislodgment of former German control of copper through selling will come from the breaking up of the former system and transferring each unit of that system to other hands; rather than transferring the old units in block to non-German hands. Sales of American copper should be handled by a large number of separate agencies actively competing for the domestic market ”

“ The building of the railroad from Corocoro to Tacna will afford the copper mines cheaper freights.
The government exacts a small export duty on the copper ore. The industry has promising possibilities in other regions, in addition to the increased development that may be looked for in the Corocoro district. The best paying of these is in Lipez, where the white native copper is produced and the ore treated simply by concentration. ”

“ Though from 1840 onward, the British copper mining industry commenced to decline, still for 20 years longer the Swansea smelting works prospered more and more as new mines were being opened abroad and thus furnished a constantly increasing supply of rich copper ore, cheap to purchase and easy to smelt. ”

“ The demand has, to a large extent, increased irrespective of price up to recent years, owing to the necessity of employing copper for such purposes, though the natural economic factor that an enhanced price of the metal tends to some discouragement of expansion and of fresh electrical enterprise, has exerted considerable effect in checking consumption. ”

“ The demand for particularly pure metal in electrical and conductivity work therefore usually necessitates a further purification of the converter-copper (unless it be an exceptionally pure brand) and the production of metal specially free from the injurious constituents which persist to a small but sometimes very appreciable extent in the metal under the ordinary oxidising conditions. The presence of silver and gold in the copper may afford in many instances sufficiently good reason for a separating process independently of the market for the pure copper itself. ”

“ South America, Mexico, Canada, Africa, and Australia are exporters of copper. The control of these countries over their production in each case is political and not financial, except in the case of Canada, where about half the financial control is also Canadian. It is in these countries and in Spain that the United States and England have financial control of a large copper supply. ”

“ To chemical science, therefore, we are indebted for such an ample supply of this valuable metal. It is asserted, that a large copper mine has been worked for some time in the state of New-Jersey in America, and that the ore raised there is brought to this country to be smelted. Native oxides of copper are found in Cornwall and in South America. Carbonate of copper occurs as a natural production in two varieties, called malachite and mountain green. Sulphate of copper, of a very rich quality, is also found in the state of Connecticut. The stream in its course destroys vegetation ”

“ It seemed to me, then, a curious anomaly that, while capital was chasing investments which promised but four per cent., it eschewed copper which yielded from sixteen to twenty-five per cent., and my investigations told me that a producing copper-mine is the surest business venture a man engages in, for, by the time it begins to produce profitably, it must be so far developed that its owners are certain of ore to work on for decades ahead. A good copper-mine is really a safe-deposit vault of stored-up dividends, which cannot be stolen nor destroyed by fire, flood, or famine. ”

“ No single country compares at present with the United States in the production of copper, but if reports be correct there is enough copper in central Africa to supply the world for years to come. Next to the United States, Spain mines the largest amount at present, and Japan ranks next. ”

“ If these refineries control the sale of all the production of copper several objectionable features develop. The few sales agencies handle so much copper that there is a tendency to co-operate with representatives of foreign consumers who can buy in large quantities, and it is not difficult to manipulate the market temporarily, in disregard of actual conditions of demand and supply. Thus the entire output of copper, one of our great natural resources, is placed in the hands of groups who, while interested in mining, are more interested in refining. ”

“ No other country produces one-sixth as much copper as the United States.
England, because of production in the British Empire (mainly Africa and Australia) and British financial control of production in various foreign countries, is not dependent upon the United States for supplies of raw copper. Japan, Spain, Portugal, and Norway are able to produce from local mines enough copper for their own needs and for export. But France, Italy, Russia, Germany, and the rest of Europe normally are dependent upon foreign sources, chiefly the United States. ”

“ Of the persistent elements, the retaining of the gold and silver in the converter-copper is a factor of much economic advantage, but the other impurities are curiously just those which are characterised by possessing most injurious effects on copper intended for electrical work—for which purpose most of the material is employed. ”

“ On the other hand, increased usage of electrical energy compared with energy generated from combustion of petroleum and its derivatives is likely to greatly increase demand for copper.
The environmental considerations in both the mining and manufacture of copper are formidable. The mining operation scars the land and surface restoration presents a major ecological problem. Because one ton of water is required per ton of ore processed, adequate water supplies must be available. ”

“ If the world production should grow so great as to cause a decided drop in the price, much that is now considered available could not be mined at a profit, and the copper supply from this country would be greatly reduced. If, on the other hand, copper should rise to fifteen or twenty cents or higher, the amount of available copper land would be vastly increased. ”

“ Copper may be separated, in a state of great purity, from ANTIMONY, ARSENIC, BISMUTH, LEAD, IRON, TIN, ZINC, &c., as it exists in bell-metal, brass, bronze, gun-metal, mosaic gold, and other commercial alloys, by fusing it in a crucible for about half an hour, along with copper scales (black oxide) and ground bottle-glass, or other like flux. The pure metal is found at the bottom of the crucible, whilst the impurities are either volatilised or dissolved in the flux. The proportions for refining commercial copper are, metal, 10 parts ”

“ The present situation in the copper market is such that the enhanced production has again resulted in an accumulation of stocks, which has occasioned restricted output on the part of many of the principal smelters until briskness of trade development shall call forth increased consumption and more satisfactory prices. ”

“ These causes are, in the main, an increase in the general supply of copper, owing to the discovery and working of remarkably productive mines and to a coincident restriction in the consumption and use of copper by the substitution of other and cheaper metals for industrial purposes. ”

“ To-day more than eight-tenths of the copper ores of the world are reduced to impure copper bars or to fine copper at the mines; and where the character of the ore permits, the cupola furnace is found more economical in both fuel and labour than the reverberatory.
The Welsh method finds adherents only in Wales and Chile. In America the usual method is to roast ores or concentrates so that the matte yielded by either the reverberatory or cupola furnace will run from 45 to 50% in copper, and then to transfer to the Bessemer converter, which blows it up to 99%. ”

“ Modern methods in copper smelting and refining have effected enormous economy in time, space, and labour, and have consequently increased the world’s output. With pyritic smelting a sulphuretted copper ore, fed into a cupola in the morning, can be passed directly to the converter, blown up to metal, and shipped as 99% bars by evening—an operation which formerly, with heap roasting of the ore and repeated roasting of the mattes in stalls, would have occupied not less than four months. ”

“ He pointed out several new forms of crystals in the slags from his blast furnaces, and he also beautifully illustrated the theory of the formation of native copper from the vaporized chloride of copper, while working the Atacamite of Peru.
"The most important of his labors were of an eminently practical nature, such as discovering the best and most economical methods of mixing the various copper ores of commerce, so as to make one ore flux another, and thus to obtain the largest yield of metal at the least expense. ”

“ These-conditions as well as transportation and other logistical problems in Zambia, adversely affected the supply of copper to world coppermarkets. The supply shortage, combined with the high level of demand, has driven prices upward.
The largest domestic use of copper is in electrical equipment and supplies. Electrical wiring, test equipment, power generation and distribution systems, sophisticated electronic navigation and communications systems require large quantities of copper. ”

“ We want the admission merely under proper and safe regulations, of foreign copper for refining, to draw to this country [338] the whole supply of copper for the world, by which prices would be regulated and maintained, and our copper-mining interests put beyond the reach of successful rivalry.
This country did not furnish any supply of unwrought copper to the continent of Europe, or to the United States of America, which was worthy of notice, before the year 1830; in fact, previous to that time, we imported considerable quantities of foreign copper for re-exportation to India. ”

“ It is then, in his opinion, the solution of the metal—the wear of its surface, by keeping it smooth, which prevents the adhesion of foreign matter. Whenever the copper is unequally worn, deposits will, without doubt, rest in the rough parts, or depressions in the metal, and afford a soil or bed in which sea-weeds can fix their roots, and to which zoophytes and shell-fish can adhere; but there is another cause of foulness on the protected sheathing, arising from the deposit of earthy matter upon the copper, in consequence of its electro-negative condition. ”

“ The conditions of copper mining are exactly opposite from those of silver. The Indians used almost no metal except copper, and for three hundred years white men used the old Indian mines and refined the copper by Indian methods. Better methods of mining copper and extracting it from the ores have been employed for the last fifty years, but within a dozen years the refining of copper has been revolutionized by electric methods. An enormous amount has been produced, but production has been kept down on account of the high prices. ”