The principal ore used in the production of iron and steel is which one of the following? hematite. For the copper-nickel phase diagram below, estimate the composition of the liquid phase for a nominal composition of 60% Ni and 40% Cu at 1315°C (2400°F) in terms of percent.? About us. About Quizlet; How Quizlet works;

chromium. In chromium processing: Ores. Although chromium occurs in many minerals, the only ore exploited commercially is chromite. ... There are more than 25 known minerals containing mercury, but the principal ore mineral is cinnabar, a soft, red to reddish brown mercury sulfide. Some cinnabar deposits may also contain elemental mercury.

By contrast, the petrological literature uses chromium spinel as a term that includes chromite (Dick & Bullen Citation 1984). Chromitites are rocks containing > 10% chromite ... The principal ore mineral present is chromite, which occurs as …

Chromite. Chromite is the commercial name of iron chromium oxide (FeCr2O4), a mineral comprised of chromium and iron oxide that is naturally found in the earth's mantle. When extracted, it is referred to as chrome ore. Chromite is crucial for the production of ferrochrome, an alloying agent in manufacturing stainless steel.

Chromium (Fig. 1) is the 24th most abundant element in the earth crust; its basic properties are compiled in Table 1. Fig. 1. Chromium, re-melted in an arc zone-refiner, showing large crystal grains. Full size …

Sources: The principal ore of chromium is chromite (FeCr 2 O 4). The metal may be produced by reducing its oxide with aluminum.

What Do You Think Geologists in Africa have found economically valuable concentrations of chromite (the principal ore of chromium) that formed by magmatic differentiation in thick mafic sills. In the same area, there are also mafic lava flows that look very much like the sills, but which contain none of the valu- able minerals.

Laterite has been used as an iron ore and, in Cuba, as a source of nickel. Chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr2O4) that is the chief commercial source of chromium. It is the principal member of the spinel series of chromium oxides; the other naturally occurring member is magnesiochromite, oxide of ...

Naturally occurring chromium is composed of the three stable isotopes 52 Cr, 53 Cr and 54 Cr with 52 Cr being the most abundant (83.8 %). 19 radioisotopes have been characterized with the most stable …

Statistics and information on the worldwide supply of, demand for, and flow of the mineral commodity chromium. Chromium (Cr) has a wide range of uses in metals, chemicals, and refractories. It is one of the Nation's most important strategic and critical materials. Chromium use in iron, steel, and nonferrous alloys enhances hardenability and ...

It is present in form of various ores, and the most common ore is iron chromium oxide FeCr 2 O 4, which is termed as chromite. Chromite is the principal source of chromium that is used in pigments, worldwide. …

Aluminothermic production of high purity chromium metal accounts for over 95% of chromium metal produced today. The first step in this process requires that the chromite ore is roasted with soda and lime in the air at 2000°F (1000°C), which creates a sodium chromate containing calcine.It can be leached away from the waste material and …

Study with Quizlet and memorize flashcards containing terms like Which two of the following alloying elements are used in the highest proportion in high-speed steel, Which two of the following alloying elements are most commonly associated with austenitic stainless steel, The principal ore used in the production of iron and steel is which one …

Chromite is the most important ore of chromium. Crystals are uncommon, but when found they are octahedral. Chromite is usually massive or in the form of lenses and tabular bodies, or it may be …

Figure 12.3.4 12.3. 4: A Blast Furnace for Converting Iron Oxides to Iron Metal. (a) The furnace is charged with alternating layers of iron ore (largely Fe2O3) and a mixture of coke (C) and limestone (CaCO3). (b) This blast furnace in Magnitogorsk, Russia, was the largest in the world when it was built in 1931.

Chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr2O4) that is the chief commercial source of chromium. It is the principal member of the spinel series of chromium oxides; the other …

Chromium forms many colorful compounds that have industrial uses. Lead chromate (PbCrO 4), also known as chrome yellow, has been used as a yellow pigment in paints. Chromic oxide (Cr 2 O 3), also known as chrome green, is the ninth most abundant compound in the earth's crust and is a widely used green pigment. Rubies and emeralds …

Chromium Ore. Chromium is a critical alloying metal. It is used in the production of alloys with other metals such as nickel, cobalt, copper, and others, as well as in many other metallurgical, refractory, and chemical industries. Chromium increases the strength, hardness, and toughness of its alloys. Chromite (Cr) is the only commercially ...

The principal ore used in the production of iron and steel is which one of the following. Which of the following properties or characteristics do not apply to metals (two correct answers): ... chromium, nickel. 17 of 29. Term. High-speed steels are used in cutting tools for machining. Which of the following alloying elements are used in the ...

The principal ore is chromite, which is found in Zimbabwe, Russia, New Zealand, Turkey, Iran, Albania, Finland, Democratic Republic of Madagascar, and the Phillippines. The …

Chromium is used in the stainless steel industry to manufacture and produce several alloys. A plating of chromium gives a mirror finish to stainless steel. Cars and trucks have number plates made up of stainless steel. These stainless steel parts contain chromium. Chromite is said to be the principal ore of Chromium.

Chromium Properties: Chromium has a melting point of 1857+/-20°C, a boiling point of 2672°C, a specific gravity of 7.18 to 7.20 (20°C), with valences usually 2, 3, or 6. The metal is a lustrous steel-gray color which takes a high polish. ... Sources: The principal ore of chromium is chromite (FeCr 2 O 4). The metal may be produced by ...

Principal compounds. The most common oxidation states of chromium are +6, +3, and +2. A few stable compounds of the +5, +4, and +1 states, however, are known. In the +6 oxidation state, the most important species formed by chromium are the chromate, CrO 4 2−, and dichromate, Cr 2 O 7 2−, ions. These ions form the basis for a …

The only ore of chromium is the mineral chromite and 99 percent of the world's chromite is found in southern Africa and Zimbabwe. Geologists estimate that there are about 11 billion tons of mineable chromite ore in …

Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or ...

FREE Tinder™, DoorDash & more 2. Get four FREE subscriptions included with Chegg Study or Chegg Study Pack, and keep your school days running smoothly. 1. ^ Chegg survey fielded between Sept. 24 – Oct. 12, 2023 among U.S. customers who used Chegg Study or Chegg Study Pack in Q2 2023 and Q3 2023. Respondent base (n=611) among …

Chromium compounds are used as industrial catalysts and pigments (in bright green, yellow, red and orange colours). Rubies get their red colour from chromium, and glass treated with chromium has an emerald green colour. Biological role. Chromium is an essential trace element for humans because it helps us to use glucose.

Find step-by-step Earth science solutions and your answer to the following textbook question: Geologists in Africa have found economically valuable concentrations of chromite (the principal ore of chromium) that formed by gravity settling in thick mafic sills. In the same area of Africa, there are also mafic lava flows that look very much like the sills but …

Chromite. Chromite is a black chromium-bearing mineral, FeCr 2 O 4. It is a principal ore of chromium (Cr). Chromite is a member of the spinel group. These minerals share the same structure but differ in composition. Al and Mg in the lattice of spinel are replaced by Cr and Fe, respectively. Crystals picked out of a chromite concentrate from ...

Question: 6.10 The principal ore used in the production of iron and steel is which one of the following: (a) bauxite, (b) hematite, (c) limestone, (d) magnetite, or (e) smithsonite? 6.11 Today, the two most important processes in steelmaking are which of the following (two correct answers): (a) basic oxygen furnace, (b) Bessemer converter, (c) electric arc …