The engineeringgeological investigations of apatite–nepheline ore flotation tailings in the sites applied with chemicals at ANOF2 processing plant of Apatit Company are carried out.
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The comparative economical analysis and energetic analysis of alumina production from various kinds of raw materials were carried out basing on industrial data. The main process parameters of nepheline raw materials processing through sintering adopted at large industrial scale are given. The said technology allows the wasteless utilization of …
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Arlyuk, B. I. and Pivnev, A. I. Efficiency of nepheline ore processing for alumina production, TMS Light Metals, pp. 181–195, 1991. Google Scholar Arlyuk, B. I. Evaluation of efficiency of processing nepheline raw material for production of alumina, TMS Light Metals, pp. 9–18, 1992. Google Scholar
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The nepheline concentrate is processed in limited quantities into alumina, soda, potash, and Portland cement. The major part of nepheline is stored in the tailings. The proportion of nepheline …
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Our industrial experience with nepheline ore processing can be summarised as follows: at Pikalevo alumina refinery (Leningrad region) all the produced belite mud is processed into cement and recovery of waste is achieved. At the Achinsk alumina complex (Krasnoyarsk region, Siberia), the complete utilization of belite …
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High energy intensity, capital intensity, and significant emissions into the atmosphere are the main drawbacks of the conventional technology of nepheline ore processing by the sintering method.
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The waste of apatite-nepheline ore processing was chosen as the material of study for the present investigation. The chemical and phase compositions have been analyzed and the route of the new ...
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B. I. Arlyuk and A. I. Pivnev, «Efficiency of nepheline ore processing for alumina production», Light Metals 1991 Edited by E. R. Cutshall, The Minerals, Metals & Material Society, (1992), 181 ...
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The energy and resource efficiency of the apatite–nepheline ore waste processing technology is considered to be reached if the state of the CETS is such that Eq. (1) is minimized. The total thermal energy consumption Q t_Σ is concentrated within the MIMCT. The total electric energy consumption is the sum of the consumptions by …
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Geological setting and mineral composition of (apatite)-nepheline-titanite ore from the Khibiny massif enable selective mining of titanite ore, and its processing with sulfuric-acid method ...
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The technological and heat engineering substantiation for a new process arrangement for nepheline production using the sintering process is presented. In this process desilication of aluminate liquor and evaporation of a soda liquor is combined in one stage. ... «Efficiency of nepheline ore processing for alumina production», Light Metals ...
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The paper presents a structure of the digital environment as an integral part of the "digital twin" technology, and stipulates the research to be carried out towards an energy and recourse efficiency technology assessment of phosphorus production from apatite-nepheline ore waste. The problem with their processing is acute in the regions …
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processing method for nepheline consists of sintering the ore with limestone. The main disadvantages of the sintering process are high energy consumption, high capital costs and significant atmospheric emissions. Due to technological advancements, it is possible to use a hydrochemical alkaline-sulphate method for the …
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*The specific gravities of the minerals in the ore in question are as follows: magnetite, 5.1; perovskite, 4.0; pyroxene, 3.5; sphene, 3.4; apatite, 3.2; nepheline, 2.6 gcm-3. 38 CONCLUSION The above results indicate a tendency to selective liberation in the proposed process. For example, the yield of nepheline monofractions is higher by …
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The raw materials were nepheline concentrate and silica gel, which are products of the processing of apatite-nepheline ore. Directly before the synthesis of low-modulus zeolites, the morphology ...
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EOSFs is an urgent problem in the process of increas-ing the energy efficiency of plants. The interdisciplin-ary character of scientific studies on the creation of scientific foundations for the complex energy- and resource-efficient environmentally safe processing of apatite-nepheline ore wastes is due to the need to
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The article presented the results of studies on the production of low-modulus zeolites from two types of technogenic resources containing a sufficient amount of silicon in their composition. The raw materials were nepheline concentrate and silica gel, which are products of the processing of apatite-nepheline ore. Directly before the synthesis of …
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In leaching process for the nepheline ore of type A, the recovery of values from the sinters (82.8%) were 6 to 8% higher than B,C and D types. In the first stage of desilication of Aluminate ...
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The improved process flowchart ensures production of nepheline concentrate which satisfies requirements of subsequent processing by sintering with lime and contains not less than 26.4% of alumina and not more than 2.3% of total iron, with alumina recovery of not less than 90% at the silica modulus of 0.6 and alkali modulus of …
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The main process parameters of nepheline raw materials processing through sintering adopted at large industrial scale are given. The said technology allows the wasteless …
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Nepheline syenite shows more efficiency in ore processing for alumina production in the point of view of low operating cost, low environmental pollution, and the …
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The object of the study was apatite-nepheline ore of the Khibiny deposits group (Russia) and phosphate ore of the Abu-Tartur deposit (Egypt). For the development of ... Mineralogical and Technological Aspects of Phosphate Ore Processing 61. To determine the optimal processing scheme for ANO and PO, samples with a
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A conceptual foundation based on the methods of automatic control theory, i.e., the state-space description of control objects, is proposed for the creation of a universal program-optimization model for a chemical energotechnological system. A comprehensive formulation for the problem of engineering applied to a multistage chemical …
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The present paper focuses on the possible use of nepheline syenite, originated as a mine byproduct, in alumina production through leaching with an azeotropic HCl …
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The modal composition of (apatite)-nepheline-titanite ore and its geological setting within apatite deposits of the Khibiny Massif allow selective mining of titanite ore and its hydrochloric acidic processing. The reaction of titanite with concentrated hydrochloric acid produces hydrated titanosilicate precipitate (TSP) which, in turn, can be a precursor …
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ore is in demand on the world market, as it is a high-quality raw material for the production of phosphate fertilizers, and the products of its processing are a promising resource of valuable components (Ponomareva et al., 2021). The composition of apatite-nepheline ore includes nepheline
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More complex and dynamic processes occur at the stage of apatite-nepheline ore processing, which is due to the grinding and the implementation of a number of separation processes that provide the production of apatite concentrate with a recovery of 32%. The remaining rock mass, representing the tails of apatite production, …
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This is similar to the scenario where water has a smaller breakdown field strength than solid, as presented in Fig. 1. In the initial application of HVP technology for the mining industry in the 1970′s, Andres presented a liberation study of apatite-nepheline ore comminuted by electric discharges in comparison with mechanical roll milling [3].
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Improved Quality of Raw-Material Mixture for Comprehensive Processing of Nepheline Ore and Concentrates by Sintering at the Achinsk Integrated Alumina Plant
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potash, and cement - the same as in process-ing of nepheline ore to obtain one ton of alumina) by various methods given in the right column of the Table I, show that in nepheline processing total power consumption is higher by 15-40% than in processing of high-grade bauxites and production of soda, potash and cement by traditional ways.
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