Semantic Scholar extracted view of "Geopolymerization mechanism of binder-free mine tailings by sodium silicate" by Babak Koohestani et al. ... pyrite, as a major mineral in sulfidic mine tailings, can transform to iron oxides. Generated iron oxides, if exhibiting enough magnetic properties, can be … Expand. 30. PDF. Save.

Structure of Sodium silicate ((Na 2 O) x ·SiO 2) Uses of Sodium silicate ((Na 2 O) x ·SiO 2) Sodium silicate is used in wastewater treatment plants as an iron flocculant and an alum coagulant. It is used as hand-dyeing as a fixative. It is used in Pottery. It is widely used in food preservation, homebrewing, and aquaculture. Production of ...

Flotation Reagents - 911 Metallurgist

The modified iron mine tailing with 10% sodium silicate addition (SBC2-400-10S) demonstrated lowest solubility (<2%); by contrast, no addition of sodium silicate showed highest solubility (≈15%). Table-4. Solubility of sorbents with defferent mixing sodium silicate ratios. Sorbent materials % solubility SBC2-400 ≈15 SBC2-400-5S 5-10 SBC2 ...

 — This study evaluated the use of iron ore tailings (IOT) as a source of silica (SiO2) to produce an alternative form of sodium silicate (SS) for use as an activator in …

 — Sodium silicate can bind mine tailings through geopolymerization. ... The typical stretching bands at 528 and 3610 cm −1 in tailings specimens respectively present iron species and concentrated –OH groups on their surfaces [60], [61]. All the emerged peaks in sample 3 are originated from either tailings or silica gel, meaning no secondary ...

 — The alkaline solution was produced from a commercial solution of sodium silicate Na2SiO3 (SS) and a 10M solution of sodium hydroxide NaOH (SH) prepared from solid flakes (3:1 mass ratio of SS:SH).

This study evaluated the use of iron ore tailings (IOT) as a source of silica (SiO 2) to produce an alternative form of sodium silicate (SS) for use as an activator in one-part geopolymer binders. The novel SS was produced in a mechano-thermo-chemical process for mixing IOT with sodium hydroxide (NaOH).

 — The XPS spectrum in Fig. 2 a discloses the presence of C 1s, Na 1s, Fe 2p, Si 2s, Si 2p, and O 1s in NFSO-C. The high-resolution XPS of Fe 2p is presented in Fig. 2 b, which contains two parts (Fe 2p 3/3 and Fe 2p 1/2) due to spin-orbit coupling [32].The binding energy at 710. 1 and 725.5 eV can be attributed to Fe 2p 3/2 and Fe 2p 1/2, …

 — A high dosage of sodium silicate inhibits the depolymerization of the source material, which results in a sample with less amorphous aluminosilicate gel and, therefore, lower hydrolytic stability. ... (Al + Fe) ratio was 1.6. The specific contaminants of concern in these gold mine tailings include chromium, arsenic, iron, copper, and zinc.

Producing sodium silicate powder from iron ore tailings for use as an activator in one-part geopolymer binders Ricardo A.M. Figueiredo a,*, Paulo R.G. Brandão a, Marios Soutsos

 — This study has demonstrated that it is possible to use iron ore tailings as a SiO 2 source in the production of an alternative sodium silicate powder to be employed in the synthesis of one-part geopolymers. This can help reduce the disposal of mining waste.

The common regulators are lime, soda ash, and sodium silicate for alkaline circuits, and sulphuric acid for acid circuits. Many other reagents are used for this important function. The separation required and character of ore …

 — Similarly, sodium silicate, a good dispersant for silicates present in iron ore does not disperse any kaolinite (Ma et al., 2009a). Taking into consideration all the above facts, we aimed to seek a thorough understanding of the difference in the flotation response of a quartz rich and an alumina rich ore in a comprehensive manner.

 — It is also possible to identify the use of "sodium hydroxide/NaOH," "KOH," and "sodium silicate" as being the most used activators. ... Becker F, Eser RA, Hoelzmann P, Schuett B (2019) The environmental impact of ancient iron mining and smelting on Elba Island, Italy–A geochemical soil survey of the Magazzini site. J Geochem ...

 — Among various mine tailings as source material for geopolymer the copper mine tailings (CMTs), iron mine tailings (IMTs), and gold mine tailings (GMTs) are widely researched as is summarized in Table 1.In the geopolymer, they are often mixed with other alumina silicate source materials e.g. fly ash, blast furnace slag, metakaolin, copper …

Mine tailings disposal is an increasingly important issue for mining companies. Two recent tailing dam failures in Brazil have caused unmeasurable environmental, social and economic damages. ... T1 - Producing sodium silicate powder from iron ore tailings for use as an activator in one-part geopolymer binders. AU - Figueiredo, Ricardo A.M. AU ...

 — Sodium silicate is also used in this process as a dispersant of fine particles. The phosphorus content can be easily reduced to an acceptable level of less than 0.025 wt% P by increasing collector dosage. ... Flotation of iron ore. 8th Annual Mining Symposium, Duluth, Minnesota, U.S.A. [3] Krishnan, S.V., Iwasaki, I., 1984. Pulp …

To mimic a typical complex, low-grade REE-bearing iron-oxide-silicate-rich tailings, low-grade mixtures (0.83% TREO grade) were tested with the fatty acids (oleic acid and sodium oleate) and hydroxamic acid in the absence and presence of sodium silicate and starch as depressants . Both depressants were effective in selectively decreasing the ...

 — In this context, the present work brings the use of iron ore mining waste for an alternative production of a binder. The IOT Binder uses a differentiated production of …

Used as a starting material for zeolites and silica catalysts, as an adhesive and binder, corrosion inhibitor, penetrating sealant, in cements, drilling fluids, for fireproofing wood, paper, and fabric, as a detergent booster, in waste water treatment, and as shell coating to preserve eggs; [Merck Index] Used in boiler compounds, cleaners (laundry, dairy, floor, …

The role of sodium silicate in the anionic flotation of a Floridaphosphate ore was investigated using laboratory continuous flotation tests, frothability tests and SEM observations.In the absence of sodium silicate, Ca++ promoted the unwanted activation of quartz by forming calcium bearing precipitates.The addition of sodium silicate enhanced …

1.Overview (1) Sodium silicate, also known as silicate of soda, it is a dispersion system of sodium silicate, potassium silicate, lithium silicate and quaternary ammonium silicate in water with the coexistence of ions, molecules and colloidal particles of silicate. (2)The appearance of pure sodium silicate is a colorless transparent viscous liquid. It becomes …

 — Therefore, it is important to determine the adhesion property to investigate the performance of glass lubricants. To explain the adhesion effect of sodium silicate glass on iron oxide surface, we investigated the Si atoms near the top surface by averaging their displacements from the initial position along the sliding direction.

 — ABSTRACT Mining is facing a transformation in terms of environmental and social performance with improved mine waste management practices required. The …

 — For dispersant-kaolinite interactions, it was found that sodium silicate, a standard dispersant widely used in iron ore flotation for silicate gangue minerals, is …

 — Binary alkali silicate glasses are new promising lubricants for harsh working conditions, such as high pressure, elevated temperature, and high sliding speed. In the present work, the tribochemical reaction of sodium silicate under sliding contact with iron oxide substrates was investigated using First Principle Molecular Dynamics. The result ...

 — The use of sodium silicate, sodium hydroxide and sodium hexa-metaphosphate resulted in 0.37, 0.44 and 0.50% ball wear, respectively, compared to 0.55% observed for the blank (without GA). This observation can be attributed to the improved fluidity of the slurry which reduces the frictional wear on the grinding media …

 — Tailings from gold mines gradually approach ultra-fine, making mine backfill costs higher and strength lower, which poses a serious threat to the safety of underground personnel and equipment. It is well …

economic damages. This study evaluated the use of iron ore tailings (IOT) as a source of silica (SiO 2) to produce an alternative form of sodium silicate (SS) for use as an …