Survey of World Iron Ore Resources: Occurence, Appraisal and Use: Report of a Committee of Experts Appointed by the Secretary-General |
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... iron production in 250,000 - ton plants 147 19. Estimated cost of pig - iron and sponge iron produced by different processes in plants of various sizes , installed on the Atlantic coast 149 20. Material required for a basic open hearth ...
... iron production in 250,000 - ton plants 147 19. Estimated cost of pig - iron and sponge iron produced by different processes in plants of various sizes , installed on the Atlantic coast 149 20. Material required for a basic open hearth ...
Page 12
... iron ore on the different smelting processes now in use for production of pig - iron , sponge iron or steel is described , and the metal- lurgical and economic characteristics of the various " Relation of Type of Ore to Smelting ...
... iron ore on the different smelting processes now in use for production of pig - iron , sponge iron or steel is described , and the metal- lurgical and economic characteristics of the various " Relation of Type of Ore to Smelting ...
Page 15
... sponge iron ) or in an electric furnace . Most of the vanadium in iron ores goes into the pig- iron , and if recovery as a by - product is feasible , various blast furnace and steel - making practices for that purpose are used . Zinc ...
... sponge iron ) or in an electric furnace . Most of the vanadium in iron ores goes into the pig- iron , and if recovery as a by - product is feasible , various blast furnace and steel - making practices for that purpose are used . Zinc ...
Page 16
... sponge iron instead of pig - iron . Sponge iron is a porous mass of metallic iron that is produced without melting , either by limited heating of an ore - carbon mixture or by ore being treated with carbon monoxide or hydrogen . The iron ...
... sponge iron instead of pig - iron . Sponge iron is a porous mass of metallic iron that is produced without melting , either by limited heating of an ore - carbon mixture or by ore being treated with carbon monoxide or hydrogen . The iron ...
Page 17
... sponge iron is produced instead of pig - iron , the sponge iron has , in most cases , to be melted in order to separate the iron from the gangue and produce steel ingots of the composition desired . If the ore is extremely pure or if it ...
... sponge iron is produced instead of pig - iron , the sponge iron has , in most cases , to be melted in order to separate the iron from the gangue and produce steel ingots of the composition desired . If the ore is extremely pure or if it ...
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Common terms and phrases
50 per cent aeromagnetic aeromagnetic survey alumina anomalies appraisal average banded banded iron formation beds beneficiation Bessemer blast furnace bodies carbon cent iron cent silica chamosite coke concentrates contain cost district drilling east Economic exploration feet ferruginous figure Geological Survey grade hematite Hematite Fe hematite-quartzites high-grade important indicated Iron and Steel iron content iron deposits iron formation iron ore deposits iron ore resources iron sands kilogrammes kilometres Lake Superior Lake Superior type lateritic lime limestone limonite Limonite Fe low-grade magnetic magnetite Magnetite Fe Magnitnaya manganese massive material metal metres miles million tons millions of tons Mineral occur oolitic open hearth operation outcrops output percentages phosphorus pig-iron plant potential pre-Cambrian production pyrite quartzite range region rocks schists scrap sedimentary showing iron siderite silica sinter SiO2 slag smelting sponge iron sulphur taconite thick tion titanic oxide titanium United zone
Popular passages
Page 163 - Indicated Ore. Is ore for which tonnage and grade are computed partly from specific measurements, samples, or production data and partly from projection for a reasonable distance on geologic evidence. The sites available for inspection, measurement, and sampling are too widely or otherwise inappropriately spaced to outline the ore completely or to establish its grade throughout. Inferred Ore.
Page 163 - Reserves . . . for which quantitative estimates are based largely on broad knowledge of the geologic character of the deposit and for which there are few, if any, samples or measurements. The estimates are based on an assumed continuity or repetition, of which there is geologic evidence; this evidence may include comparison with deposits of similar type.
Page 164 - Department of the United States Bureau of Mines and the United States Geological Survey.
Page 163 - Indicated reserves are those for which tonnage and grade are computed partly from specific measurements, samples, or production data and partly from projection for a reasonable distance on geologic evidence. The sites available for inspection, measurement, and sampling are too widely or otherwise inappropriately spaced to permit the mineral bodies to be outlined completely or the grade established throughout.
Page 163 - The definitions of measured, indicated, and inferred reserves, аз adopted by the United States Geological Survey and the United States Bureau of Mines, are as follows: Measured. Reserves for which tonnage is computed from dimensions revealed in outcrops, trenches, workings and drill holes and for which the grade is computed from the results of detailed sampling. The sites for inspection, sampling and measurement are...
Page 163 - The sites for inspection, sampling, and measurement are so closely spaced and the geologic character is so well defined that the size, shape, and mineral content are well established. The computed tonnage and grade are judged to be accurate within limits which are stated, and no such limit is judged to differ from the computed tonnage or grade by more than 20 per cent. 'Indicated ore...
Page 85 - ... shall illustrate the meaning of it by an analogy. Imagine a child, perhaps "Dennis the Menace," who has blocks which are absolutely indestructible, and cannot be divided into pieces. Each is the same as the other. Let us suppose that he has 28 blocks. His mother puts him with his 28 blocks into a room at the beginning of the day. At the end of the day, being curious, she counts the blocks very carefully, and discovers a phenomenal law — no matter what he does with the blocks, there are always...
Page 163 - Reserves for which tonnage is computed from dimensions revealed in outcrops, trenches, workings and drill holes and for which the grade is computed from the results of detailed sampling. The sites for inspection, sampling and measurement are spaced so closely and the geologic character is so well defined that size, shape and mineral content are well established.
Page 281 - The ore bodies form ridges and give rise to very rugged topography because of their hardness. There are two groups of ore ridges, one on the eastern side and the other on the western side of the Sandur fold belt. Sometimes, when the bands of ferruginous quartzites are followed along the strike, they are seen to grade into jaspery quartzites and phyllites, indicating a lateral variation in the composition of the original sediments.
Page 283 - ... is siliceous. Sometimes the vugs are seen to be lined with flat micaceous crystals of specular hematite. The ore bodies are lens-like when large and also form veins and stringers in the fault zone. The fault zone extends for several miles but the ore bodies are seen over a distance of only about 5 miles between the villages mentioned above. Since the fault zone hades towards the north, the southern side generally presents a scarp. There are about a dozen individual deposits of better grade ore...