dissolution of titanuim and iron of basalt

(PDF) Basalt leaching with orthophosphoric acid

(1989) work, all basaltic glass dissolution rate determinations have been performed at the temperatures of 25°C or higher. Existing experimental studies of weathering and/or alteration of basalt and basaltic glass have focused on the variation of rates with temperature, pH, water composition, glass content, basalt-

DISSOLUTION RATES AND WEATHERING PRODUCTS OF …

Jan 01, 2016· Iron hydroxides are practically insoluble under these conditions and form corrosion layer on the surface of basalt fibre composed of the hexagonal plate-like crystals. With time, the corrosion layer begins to exfoliate due to (i) very weak bonding with basalt fibre and (ii) stresses arising in corrosion shell because of mismatch of mechanical ...

Corrosion Behavior and Mechanism of Basalt Fibers in ...

Titanium is one of the most valuable elements found in blast furnace slag, with a concentration of approximate 2.7%. Because of the low level of titanium in slag, the best method of extraction is hydrometallurgy. In this study, parameters such as slag particle size, temperature, concentration of acid, solid-to-liquid ratio, and ultrasonic wave time were used to determine the recovery of ...

Mineralogy of the last lunar basalts - Brown University

iron-titanium oxides under conditions relevant to Mars. ... Fe and nearly all Ti in a basalt is present in the form of these oxides. In the shergottite meteorites, ulvöspinel ... pH and dissolution rate, as well a direct relationship between temperature and dissolution rate.

Mineralogy of the last lunar basalts - Brown University

Feb 11, 2002· Titanium's own corrosion product, Ti 4+, is a very powerful inhibitor. This is especially useful in recirculating nitric acid process streams, for example, stripper reboiler loops, where effective corrosion inhibition is achieved by maintaining steady-state levels of dissolved Ti 4+. Titanium also provides better resistance to nitric acid vapors.

Titanium | Geoscience Australia

Basalt (US: / b ə ˈ s ɔː l t, ˈ b eɪ s ɒ l t /, UK: / ˈ b æ s ɔː l t, ˈ b æ s əl t /) is a mafic extrusive igneous rock formed from the rapid cooling of lava rich in magnesium and iron exposed at or very near the surface of a terrestrial planet or a moon. More than 90% of all volcanic rock on Earth is basalt, and the eruption of basalt lava is observed by geologists at about 20 ...

Plate Tectonics May Have Begun a Billion Years After Earth ...

• iron and titanium-based alloys as structural barriers • borosilicate waste glass PNL 76-68 as a waste form. The testing also incorporated site-specific rock media and ground waters: Reference Umtanum Entablature-1 basalt and reference basalt ground water, Bull­ frog tuff and NTS J-13 well water.

Titanium Dissolution from Indonesian Ilmenite

MAPPING THE CONCENTRATION OF IRON, TITANIUM, AND THORIUM IN MARE BASALTS IN THE WESTERN PROCELLARUM REGION OF THE MOON. E. L. Flor1, B. L. Jolliff 2, and J. J. Gillis, 1Rice University and NASA Missouri Space Grant Consortium, 2Department of …

Geochemistry and mineralogy of a saprolite developed on ...

This work studied the effect of different parameters on the dissolution of iron and titanium from ilmenite in the oxalic acid and hydrochloric acid solution. The results showed that the most significant parameters in the leaching tests for iron dissolution were as follows: Ratio of oxalic acid to sulfuric acid (2:1), Acid concentration (30% w/w ...

Iron Isotope Fractionation during Proton-Promoted, Ligand ...

Sep 21, 2017· Oceanic crust is mafic, made of dark, iron-and-magnesium-rich rocks like basalt that come directly from the melting of Earth's mantle (the layer just beneath the crust). Continental crust is ...

PNL-4452, 'Nuclear Waste Package Materials Testing …

where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. The value of μ s is generally higher than the value of μ k for a given combination of materials.. Coefficients of friction between materials are best determined through testing. However, it is possible to find tables in the literature for friction coefficients between various materials.

Optimization of Ilmenite Dissolution by Synergistic Effect ...

Basalt fiber is a material made from extremely fine fibers of basalt, which is composed of the minerals plagioclase, pyroxene, and olivine.It is similar to fiberglass, having better physicomechanical properties than fiberglass, but being significantly cheaper than carbon fiber.It is used as a fireproof textile in the aerospace and automotive industries and can also be used as a composite to ...

An experimental study of crystalline basalt dissolution ...

Titanium nitride (TiN; sometimes known as Tinite) is an extremely hard ceramic material, often used as a coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties.. Applied as a thin coating, TiN is used to harden and protect cutting and sliding surfaces, for decorative purposes (due to its golden appearance), and as a non-toxic exterior ...

10. MAGNETIC PROPERTIES, IRON-TITANIUM OXIDES, …

This led to the maximum titanium concentration of 63% that was comparatively very high compared with low iron dissolution of only 11%. Spores of A. niger and P. citrinum solutions were individually transferred at the culture ratio of 1 : 0, 0 : 1 and 1 : 1 in a shake flask …

Basalt fiber - Wikipedia

May 18, 2017· However, rock dissolution mechanisms are found to dominate this secondary mineral precipitation resulting in an increase in porosity and decrease in rigidity of all samples. The basalt with the highest initial porosity and volcanic glass volume …

(PDF) Association of trace elements and dissolution rates ...

This led to the maximum titanium concentration of 63% that was comparatively very high compared with low iron dissolution of only 11%. Spores of A. niger and P. citrinum solutions were individually transferred at the culture ratio of 1 : 0, 0 : 1 and 1 : 1 in a shake flask …

Metals from Ores: An Introduction

This work studied the effect of different parameters on the dissolution of iron and titanium from ilmenite in the oxalic acid and hydrochloric acid solution. The results showed that the most significant parameters in the leaching tests for iron dissolution were as follows: Ratio of oxalic acid to sulfuric acid (2:1), Acid concentration (30% w/w ...

Titanium and iron dissolutions from ilmenite by acid ...

After the basalt fibers were immersed in 1 mol/L NaOH solution at 50 °C for 1 h, 3 h, 6 h, 1 day and 3 days, their retention ratios of strength were 67.6%, 57.8%, 52.5%, 49.0%, 58.2%, respectively. Higher temperature accelerated the corrosion rate of basalt fibers, shortened the formation time of the corrosion shell and increased mass loss.

IRON REMOVING FROM TITANIUM SLAG FOR SYNTHETIC …

Bulk chemistry, electron imaging, and X-ray mapping indicate early Fe and Mg depletion by dissolution of ferromagnesian minerals, followed by depletion of alkalis, Al, Ti, and P that corresponds to dissolution of feldspars, titanomagnetite, and apatite.

Dissolution and secondary mineral precipitation in basalts ...

used for making iron. The presence of pyrite and pyrrhotite in sulphide ores is undesirable and usually methods have to be found to remove them [2]. Ilmenite is a source of titanium as well as iron. Although titanium minerals are used for producing titanium metal, yet 99% of the tonnage is used for TiO 2 pigment manufacture. Furthermore,

MAPPING THE CONCENTRATION OF IRON, TITANIUM, AND …

Mn, Co, Pb and Zn in goethite is known to increase its The dissolution rates of the synthetic goethite and Kk dissolution rate (Alvarez et al. 2005, 2008; Kaur et al. 2010), samples at pH 3.0 in this study were close to the dissolution whereas the substitution of Al, Cr and Cd decreased the rates of goethite at pH 5.0 in the presence of 200 mM ...

Dissolution Kinetics of Titanium in Carbon-Saturated Iron ...

The content of titanium is important for prolonging blast furnace life. In this study, the dissolution kinetics of titanium in carbon-saturated iron was studied. The carbon-saturated pig iron was heated to 1200, 1250 and 1300 °C, respectively, and then an appropriate amount of titanium-iron …

Dissolution of titanium and iron during leaching of ...

Feb 11, 2002· Titanium, like any other metal, is subject to corrosion in some environments. The types of corrosion that have been observed on titanium may be classified under the general headings: general corrosion, crevice corrosion, stress corrosion cracking, anodic breakdown pitting, hydriding and galvanic corrosion.

Optimization of Ilmenite Dissolution by Synergistic Effect ...

Experiments show that Fe-Ti oxides dissolve readily at low pH and temperature on short timescales. After dissolution in H2SO4, Fe-bearing sulfate minerals precipitate from the fluid. Dissolution rates and evaporite mineralogy will be discussed.

Metals from Ores: An Introduction

cost and converting the iron oxide as part of the concentrate to value-added iron metal (Kamala, 2006). The titanium slag produced from this process represents an important feedstock for the manufacture of titanium dioxide pigment by the sulphate process. In the case of the chloride process, the titanium-rich slag is further acid-leached by a

Titanium and iron dissolutions from ilmenite by acid ...

MAPPING THE CONCENTRATION OF IRON, TITANIUM, AND THORIUM IN MARE BASALTS IN THE WESTERN PROCELLARUM REGION OF THE MOON. E. L. Flor1, B. L. Jolliff 2, and J. J. Gillis, 1Rice University and NASA Missouri Space Grant Consortium, 2Department of …

Metals from Ores: An Introduction

Iron-Titanium Oxides Oxide textures are illustrated in Plates IB and 1C. Despite the pervasive low-temperature oxidation to titanomaghemite (see magnetic properties), the grains appeared optically homoge-Table 3. Chemical analyses of the basalt samples studied. interval (cm) 115-706C-4R-3, 10-13 115-707C-25R-1, 39-43 115-707C-25R-3, 44-47

MAPPING THE CONCENTRATION OF IRON, TITANIUM, AND …

MAPPING THE CONCENTRATION OF IRON, TITANIUM, AND THORIUM IN MARE BASALTS IN THE WESTERN PROCELLARUM REGION OF THE MOON. E. L. Flor1, B. L. Jolliff 2, and J. J. Gillis, 1Rice University and NASA Missouri Space Grant Consortium, 2Department of …

MICROWAVE ASSISTED DISSOLUTION OF SRI LANKAN …

relation of iron and titanium content with age for the lunar basalts. The complex spatial and stratigraphic distribution of lunar basalt types requires more complex models of mare basalt genesis than the effects of partial melting zones moving to greater depth through time [Lofgren et al., 1981]. Instead,

Dissolution Rates and Weathering Products of Iron-Titanium ...

* sodium and calcium bentonites and mixtures with sand or basalt as a backfill * iron and titanium-based alloys as structural barriers * borosilicate waste glass PNL 76-68 as a waste form. The testing also incorporated site-specific rock media and ground waters: ... 40 Dissolution Rate As a Function of Dose Rate for PNL 76-68 Glass

Titanium - Types of Corrosion

relation of iron and titanium content with age for the lunar basalts. The complex spatial and stratigraphic distribution of lunar basalt types requires more complex models of mare basalt genesis than the effects of partial melting zones moving to greater depth through time [Lofgren et al., 1981]. Instead,

Titanium - Types of Corrosion

In laboratory studies the dissolution of iron in dilute nitric - hydrochloric acid mixtures shows an apparent reaction order of -0.62 with respect to HCl. No apparent order value for HNO/sub 3/ can be determined over the concentration ranges studied. Nickel dissolutions show apparent orders of 1.4 with respect to the HCl and 4.2 for HNO/sub 3/.

MAPPING THE CONCENTRATION OF IRON, TITANIUM, AND …

Rocks consisting essentially of iron-titanium oxides and apatite occur as small intrusive-like bodies associated with anorthosites and some alka-line igneous complexes. They have a consistent composition of two-thirds by volume oxides and one-third apatite, and invariably have dikes rich in ferromagnesian minerals and apatite associated with them.

Titanium - Corrosion by Acids

High and low titanium basalts. Basalt rocks are in some cases classified after their titanium (Ti) content in High-Ti and Low-Ti varieties. High-Ti and Low-Ti basalts have been distinguished in the Paraná and Etendeka traps a nd the Emeishan Traps.. Mid-ocean ridge basalt (MORB) is a tholeiitic basalt commonly erupted only at ocean ridges and is characteristically low in incompatible elements

Basalt fiber - Wikipedia

Basalt fiber is a material made from extremely fine fibers of basalt, which is composed of the minerals plagioclase, pyroxene, and olivine.It is similar to fiberglass, having better physicomechanical properties than fiberglass, but being significantly cheaper than carbon fiber.It is used as a fireproof textile in the aerospace and automotive industries and can also be used as a composite to ...

Titanium nitride - Wikipedia

The typical composition is 79.2% iron oxide, 14.6% titanium dioxide, 1.6% manganese oxide, 0.8% silica and aluminum oxide, and trace amounts of chromium. It can also be found in the River Dee, in Aberdeenshire, Scotland, containing 85.3% iron oxide, 9.5% titanium dioxide, 1.0% arsenic, and 1.5% silica and aluminum oxide. New Zealand

Corrosion Behavior and Mechanism of Basalt Fibers in ...

After the basalt fibers were immersed in 1 mol/L NaOH solution at 50 °C for 1 h, 3 h, 6 h, 1 day and 3 days, their retention ratios of strength were 67.6%, 57.8%, 52.5%, 49.0%, 58.2%, respectively. Higher temperature accelerated the corrosion rate of basalt fibers, shortened the formation time of the corrosion shell and increased mass loss.

Basalt - Wikipedia

Feb 13, 2019· The content of titanium is important for prolonging blast furnace life. In this study, the dissolution kinetics of titanium in carbon-saturated iron was studied. The carbon-saturated pig iron was heated to 1200, 1250 and 1300 °C, respectively, and then an appropriate amount of titanium-iron alloy powder was added.

Corrosion of uncoated and oxide-coated basalt fibre in ...

The dissolution of both titanium and iron from ilmenite was controlled by a chemical reaction on the surface of ilmenite particles. Maximum extractions of 74.2 (±1.1) % of titanium and 71.3 (±0.8) % of iron from the ilmenite ore were achieved using a microwave leaching system of 600 W, 2.45 GHz. Experimental results further showed that the ...

3 3679 00061 1022 - UNT Digital Library

concentrations from 50 % up to 75 % and dissolution time from 30 minutes up to 360 minutes. The effect of all those variables were observed on the titanium and iron dissolution from decomposed Ilmenite, whereas the titanium and iron dissolved into the aqueous sulfuric acid solutions were represented as a fraction of titanium [X Ti