Preparation and characterization of cordierite-based
In this paper, calcined asbestos tailings and coal fly ash were used as the main raw materials, without additional sintering aids, except for a small amount of yellow sand and alumina powder, and the foaming agent method was used to successfully synthesize α-cordierite based ceramic foams at a lower temperature. The product is …
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Review of the fabrication and application of porous materials from
Porous materials have promise as sound insulation, heat barrier, vibration attenuation, and catalysts. Most industrial solid wastes, such as tailings, coal gangue, and fly ash are rich in silicon. Additionally, a high silicon content waste is a potential raw material for the synthesis of silicon-based, multi-porous materials such as zeolites, mesoporous …
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Utilization of magnetite tailings as aggregates in asphalt mixtures
It can provide a way for comprehensive utilization of the asbestos tailing in asphalt mixtures. Zhang et al. [10] conducted the study on the mechanical properties of cement emulsified asphalt mortars incorporated with iron tailings as the aggregates. The results indicated that the compressive strength of the specimens increased with the ...
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Preparation and characterization of cordierite-based
Based on the chemical and mineral composition of asbestos tailings, the asbestos tailings powder was pre-fired, formed into green body and finally heat-treated to prepare glass-ceramics through ...
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CN1597154A
A process for comprehensive utilization of asbestos tailings includes such steps as breaking, dissolving in acid, filtering, oxidizing filtrate, adding alkali, reaction, filtering to remove iron hydroxide, adding alkali and surface treating agent, reaction, filtering, drying, breaking to obtain superfine active magnesium hydroxide, dissolving dregs in alkaline …
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Pre-calcination of Asbestos Tailings and Its Recycling …
ABSTRACT. Based on the attribute of asbestos tailings rich in silicon and magnesium, the powder of asbestos tailings was pre-calcined followed …
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Facile synthesis of mesoporous silica derived from iron ore tailings
With the increasing of temperatures, two weight drop and the corresponding exothermic peaks at 147 °C and 282 °C can be detected, which are related to the chemical reaction of NaOH powder with SiO 2 and Al 2 O 3 components in iron ore tailings. The endothermic peak at 747 °C corresponds to the dissolution of augite and anorthite under …
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a F. G 1,*, s P, n F r 1, c a, a c, G Z P M o s
evidence is needed; and (2) asbestos and asbestos containing mine dumps and tailings invariably contain high concentrations of asbestos minerals (generally higher than 1 wt%).
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CN109020629B
The invention discloses a process for producing a silicon-calcium-magnesium-potassium fertilizer by using asbestos tailings, which comprises the steps of crushing a serpentine raw material to about 3cm by using a cone crusher, adding the crushed serpentine raw material into a ball mill for ball milling for 30-40 min, and controlling the granularity of the …
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Study on the modification effect and mechanism of tailings powder …
Based on the problems of high carbon emission and high cost of traditional mining methods and filling materials, the tailings powder modified Coal Gangue-based Cementitious Backfill Material (CGCBM) was used for paste filling mining. In this study, the samples were prepared with different tailings powder content and different curing ages. …
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Crystallization Characteristics and Properties of Glass Ceramics
In this study, iron tailings were used as raw materials mixing with Al2O3, SiO2, and/or CaO sintered at 950–1400 °C to produce glass ceramics. In Al2O3/tailing and Al2O3/SiO2/tailing systems, the newly formed crystalline mullite (3Al2O3·2SiO2) reached its maximum content of 83.7 wt% for sample with Al2O3/SiO2/tailing mass ratio of 6/2/2. In …
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CN109513521A
The present invention discloses a kind of ore-dressing technique that iron is recycled from asbestos tailings, comprising steps of asbestos tailings are crushed after tentatively sieving, it is sieved again after broken, material of the granularity lower than 10mm adds water to enter junior's processing after regrading, and the material return greater than …
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CN114380626A
A preparation method for extracting medium and trace element fertilizer by using asbestos tailings comprises the following steps: the first step, a pretreatment procedure; step two, a magnetic separation process; step three, raw material proportioning; fourthly, preparing coal powder; fifthly, putting the raw materials into a kiln; sixthly, calcining; step seven, a semi …
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Preparation of porous glass-ceramics from coal fly ash and asbestos
Asbestos tailings are another solid waste produced during the mining and beneficiation of chrysotile. ... Both CFA and ASB contain small amounts of calcium and iron oxides. The loss of ignition (LOI) of CFA and ASB are 3.02% and 14.35%, respectively. ... CFA powder contained certain amounts of mullite (PDF#00-002-0430, Al 6 Si 2 O 13), ...
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Preparation of high temperature sensible heat storage
The required carbon content needed in the reduction of vanadium tailings was determined theoretically based on the content of Fe 2 O 3 in slag. According to the preliminary test, the molar ratio of carbon to Fe 2 O 3 was determined to be 1.04. To achieve better iron recovery, Na 2 CO 3 was added as a flux with mass ratio of 4% out of total …
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Thermal process and mechanism of phase transition and
Based on the chemical and mineral composition of asbestos tailings, the asbestos tailings powder was pre-fired, formed into green body and finally heat-treated to prepare glass-ceramics through ...
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Frontiers | Effect of Iron Tailings and Slag Powders on …
Tailings are one of the largest solid wastes in stock at present. In order to improve the comprehensive utilization rate of tailings, especially to solve the problems of fine-grained tailings treatment, the …
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Utilization of magnetite tailings as aggregates in asphalt mixtures
Iron tailings are a type of solid waste yielded during the beneficiation process of iron mine. Its effective utilization has been of great concern in scientific community. …
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Decomposition method for asbestos tailings
By using the decomposition method, the totally closed cyclic application of asbestos tailing powder to a decomposition system is realized, environmental pollution caused by discharge of solid residues is eliminated, and valuable elements such as silicon, magnesium, iron, nickel, cobalt and aluminum in the asbestos tailing powder can be ...
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Recycling | Free Full-Text | Asbestos Waste …
Asbestos Waste Treatment—An Effective Process to Selectively Recover Gold and Other Nonferrous Metals by Omirserik Baigenzhenov 1, Alibek Khabiyev 1,*, Brajendra Mishra 2, Indira Aimbetova 3, Sultan Yulusov 1, …
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ASBESTOS (CHRYSOTILE, AMOSITE, CROCIDOLITE, …
Asbestos was considered by previous IARC Working Groups in 1972, 1976, and 1987 (IARC, 1973, 1977, 1987a). ... calcium, iron, magnesium, potassium, and sodium are attached to the tetrahedra. Amphiboles are distinguished from one another by their chemical composition. ... living with a mine employee or from mine tailings from Balangero. Six ...
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Out of sight: Australia's most toxic site untouched for 60 years
Asbestos contamination from Wittenoom has impacted Rio Tinto's construction of its railway line to its $2.6 billion iron ore project in the Pilbara. The Banjima Traditional Owners say the waste ...
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Wittenoom's asbestos mining waste continues to lay unresolved …
The tailings dumps have been blown by wind and rained on for decades, causing asbestos pollution to move down into the Fortescue River valley and catchment from Wittenoom Gorge after rains flush ...
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(PDF) Asbestos Waste Treatment—An Effective Process to …
PDF | We investigated the potential of tailings generated from chrysotile asbestos fiber production as a source of iron, nonferrous metals, and gold. We... | Find, …
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Recycling of asbestos tailings used as reinforcing fillers in
Asbestos tailings are hazardous solid wastes from the residue of asbestos mine, containing short asbestos fibers (length of the fiber <1.18 mm) and ore …
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High-efficiency extraction of iron from early iron tailings via the
The high-efficiency extraction of iron from early iron tailings via the innovative suspension roasting-magnetic separation (SRMS) technology would be an …
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Recycling of asbestos tailings used as reinforcing fillers in
1. Introduction Asbestos tailings are hazardous solid wastes from the residue of asbestos mine, containing short asbestos fibers (length of the fiber <1.18 …
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Producing sodium silicate powder from iron ore tailings for use as …
The raw materials for the production of sodium silicate powder (SS Tailings) consisted of IOT as the source of silica, and sodium hydroxide (SH) in micropearls, 97% pure.Prior to sodium silicate production, IOTs were processed for 30 s in a high energy efficient laboratory disc mill to improve their reactivity, which resulted in particle sizes …
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CN110237804A
A method of efficient phosphorus adsorbent being prepared with asbestos tailings, is included the following steps；(1) asbestos tailings are mixed with the inorganic acid that mass concentration is 5% according to solid-to-liquid ratio 1:5~1:10, heating stirring is acidified 2~12 hours at 40 DEG C~80 DEG C；(2) aqueous slkali is added dropwise in …
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Recycling of asbestos tailings used as reinforcing fillers in
The high-efficiency extraction of iron from early iron tailings via the innovative suspension roasting-magnetic separation (SRMS) technology would be an important method to consolidate the ...
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