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nepheline ore processing
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Distribution of Rare Metals Obtained from the Alkaline …
The products of nepheline processing include alumina, sodium, potassium salts, silica, and rare metals. Sintering the ore with limestone is the conventional processing method for nepheline. The sintering process has significant disadvantages, such as a high energy consumption, high capital costs, and high atmospheric emissions …
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Selective extraction of potassium from raw nepheline …
The global aluminium industry is ever-changing and primarily relies on bauxite as its traditional source. However, due to the finite reserves of processed bauxite, alternative sources need to be found. Nephelines have emerged as potential alumina sources. In addition to alumina, nepheline processing can yield marketable products …
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Geochemical aspects of the mining and processing of the …
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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Nepheline Syenite as an Alternative Source for Aluminum …
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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Products of Apatite-Nepheline Ore Processing in the …
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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(PDF) Titanite Ores of the Khibiny Apatite-Nepheline …
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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Generalized Model for Engineering and Controlling a …
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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Titanite-Containing Mineral Compositions and Their …
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 technology has been developed. ... In apatite-nepheline ore mass, titanite mineral content varies within 2.5–3 wt %. According to the …
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Nepheline Using Effective Calcium Reagents
processing method for nepheline consists of sintering the ore with limestone. The main disadvantages of the sintering process are high energy …
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(PDF) Decrease of Heat Consumption at Nepheline Processing …
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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(PDF) Nepheline Syenite—An Alternative Source for
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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Selection of Binding Agents for Dust Prevention at Tailings …
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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Decrease of Heat Consumption at Nepheline Processing to …
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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Indonesian Journal of Science & Technology Products of …
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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Nepheline Syenite—An Alternative Source for Potassium …
Complex processing of non-bauxite ores for obtainment of aluminium and alumina with the production of amorphous silica, silicon, and other useful components was developed by Rimkevich et al. . A complete process of extraction and purification of the potassium salt from the nepheline syenite has been studied.
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Software for Efficient Chemical Technologies for Processing …
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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Resource-Saving Technology for Nepheline Concentrate
The most profitable is the processing of nepheline rocks with an alkali modulus of more than 0.5 and a silica modulus of at least 0.3. A restriction is …
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Efficiency of Nepheline Ore Processing for Alumina …
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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Efficiency of Nepheline Ore Processing for Alumina …
Summary This chapter contains sections titled: Introduction Description of the nepheline ore Conclusions Efficiency of Nepheline Ore Processing for Alumina Production - Essential Readings in Light Metals - Wiley Online Library
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Efficiency of Nepheline Ore Processing for Alumina …
The said technology allows the wasteless utilization of nepheline to produce alumina, soda, potash, potassium sulphate and chloride, portland cement and gallium without polluting …
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Efficiency of Nepheline Ore Processing for Alumina …
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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Efficiency of Nepheline Ore Processing for Alumina Production
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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Products of Apatite-Nepheline Ore Processing in the …
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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Dry Sintering of Nepheline — A New More Energy Efficient Technology
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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Liberation study of apatite-nepheline ore comminuted by …
*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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Kinetics Studies of Sintered Nepheline Syenite Alkaline
The purpose of this study is to develop the kinetic model and to find the optimum leaching conditions for maximum alumina dissolution from sintered nepheline syenite resource in the alkaline solution. About 80% of alumina (smaller than 5% of silica) was effectively recovered at 80 °C, 3 M NaOH, particle size less than 88 μm, agitation …
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Products of Apatite-Nepheline Ore Processing in the …
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, chemical composition, and particle size of the starting materials were analyzed. The optimal parameters for sample preparation and purification of the ...
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Hydrochemical Method for the Production of Alumina from …
The generally accepted processing method for nepheline consists of sintering the ore with limestone. The main disadvantages of the sintering process are …
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Minerals | Free Full-Text | Recovery of Catapleiite and
The processing of a low-grade eudialyte ore from the Norra Kärr deposit was investigated by a consecutive pre-concentration of paramagnetic REE-bearing phases using magnetic separation and a scavenger treatment of non-magnetic fraction to recover Zr- and REE-bearing minerals using froth flotation.
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Pre-activation of nepheline before the enrichment
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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Generalized Model for Engineering and Controlling a …
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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Nepheline Using Effective Calcium Reagents
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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Efficiency of Nepheline Ore Processing for Alumina Production
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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Liberation study of apatite-nepheline ore comminuted by …
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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Chapter 2. Production and Processing of Aluminum
produce Portland cement in a second calcination step. Processing about 4–4.5 tonnes of nepheline ore yields 1 tonne of alumina, 9–11 tonnes of cement, 0.6–0.8 tonnes of soda ash, and 0.2–0.3 tonnes of potash. According to the grade of the bauxite ore, 2–3 tonnes of ore yield one tonne of alumina and about one tonne of red mud (dry ...
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Mineral Processing of Eudialyte Ore from Norra Kärr
For the test work, eudialyte ore from Norra Ka¨rr, Sweden was used. The Norra Ka¨rr eudialyte ore is a nepheline-syenite intrusion [7]. The main components are nepheline, feldspars, aegirine, and eudialyte. These make up more than 90 % of the samples. Nepheline and feldspars have a similar mineralogy and behave similarly in the tested