Showing papers on "Mineral processing published in 1982"

Introduction to mineral processing

Abstract: Presented is a book primarily intended as a university text for a general undergraduate course in mineral processing. Major sections of the book include: fundamentals of ore processing; size reduction; sizing separation; concentration separation; dewatering; materials handling; and plant practice. Cleaning of coal is discussed in the chapter on dense medium separation. (JMT)

Extraction process and apparatus for hydrocarbon containing ores

Abstract: There is provided a hydrocarbon extraction process and apparatus for removing hydrocarbons from a hydrocarbon containing ore such as a diatomite ore. The ore is preprocessed to the extent required to produce an extractable ore and subsequently mixed with a carrier to form an ore stream. The carrier may be a nonaqueous solvent and may further comprise a non-porous granular material such as sand. The ore stream is passed in substantially vertical countercurrent flow through a nonaqueous solvent to produce a product-solvent stream and a spent ore stream. The solvent is subsequently separated from the hydrocarbon stream, which may be further upgraded by removal of a heavy portion. This may be accomplished in the presence of a substantial amount of fines.

Fine Particle Separation by Selective Flocculation

Abstract: One of the most promising techniques for separating very small particulates is selective flocculation. A number of successful applications for selective flocculation have been demonstrated on laboratory and pilot-plant testing, but with only a few commercial applications. Understanding of the process parameters and potential applications is still at the early stages, and research is underway to develop this process for cooper, coal, phosphate, and tin ores. Thus far, most of the applications of selective flocculation have been in minerals processing, where separation of the valuable minerals from associated waste rocks is the objective. But potential applications for selective flocculation also exist in other areas, such as the removal of heavy metal oxides from steel dusts and other hazardous incineration residues, separation of the impurities from ceramic mineral powders, the removal of opaque minerals from kaolin, and the recovery of values from secondary sources. In this article the methods i...

Interfacial Chemistry of Mineral Processing Separations

Abstract: Modern industry depends on a continuous supply of raw materials for the production of metals, fuels, ceramics, fertilizers, etc. This growing need for materials and energy is accompanied by the decreasing availability of mineral raw materials. Ore deposits, that is heterogeneous mixtures of solidified phases with some valuable minerals occurring in high amounts, are now having to be processed at lower grades. Thus, we are faced with limitations of the sources and supplies of mineral raw materials, and continued research is necessary if in the future we are to rely on low-grade raw materials.(1)

Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution

Abstract: Laboratory studies have been conducted to obtain optimum conditions for extracting uranium values from a graphitic ore. Experiments were carried out to extract uranium from the ore ground to minus 48 mesh with sulfuric acid as a leachant and with manganese dioxide as an oxidizing agent. The uranium extraction from the ore with sulfuric acid was found to be very sensitive to pH change throughout the leaching operation. The major dissolution of the uranium from the ore was obtained at an oxidation potential of 450 mV(versus SCE) within the narrow pH range (2.0 + or - 0.2). Experimental results indicate that the uranium(IV) in the ore is oxidized to soluble U(VI) by hydrolytic ferric ions formed within the given pH range.