Stone material is the rock upon which processing of products, rock is by mineral composition, including iron-bearing minerals is stone material qualitative source railway. Iron elements in nature, but mostly with broad distribution of compounds, because iron to the way the problem is medium lively sex metal, under high temperature easy and oxygen, sulfur, chloride and have a strong reaction, and element soluble in mineral dilute acid and strong hydrochloric acid solution, and strong alkali solution also easy to erosion iron.
So iron compound (only iron-bearing minerals) shape, just be in nature preserve. The iron compounds have oxide, sulfide, tsino iron, iron, boric acid iron, carbonic acid iron, ferric sulfate, tungsten hundreds of, but with the following four compounds as the main categories:
A, ferric oxide: contain iron oxide minerals have magnetite, hematite, limonite, iron ore and titanium.
Second, LiuHuaTie: contain iron sulfide mineral have pyrite, white iron ore, brass sand, yellow tin ore, etc.
Three, containing iron silicate minerals: have olivine, black garnet, the stone, the pillar, ordinary black pyroxene, etc.
Four, including iron carbonate minerals: have siderite and iron dolomite, etc.
Because of Culture Stone material itself contains hematite or pyrite mine the iron-bearing minerals such as iron ore, such things easily oxidation and corrosion itself, cause stone material surface color, yellow and rusty spot defects such as serious, even for iron corrosion expansion and produce crystalline particles after burst with hole. They contain iron ore to the influence of the stone material that item by item description:
A, iron-bearing minerals to the influence of granite stone in addition to contain iron minerals, and most of the sulfate containing iron ore things are likely in granite, the content of iron ore production quantity and distribution of the most extensive, followed by ferric oxide or LiuHuaTie mineral. General iron-bearing minerals color deep and dark, the value of granite adornment beautiful have the crucial influence. In the dark on granite mineral stone, often with a black, green, green is like mocha (including FeO + Fe2O3:6.43%), India black (including FeO + Fe2O3:13.2%), South Africa deep black (including FeO + Fe2O3:20.5%), Zimbabwe black (including FeO + Fe2O3:11.5%). Pyrite, white iron ore and iron-bearing minerals embedded fai long rock, forming the twinkle golden light black gold stone, India--which is the most significant sand example. Iron-bearing minerals in the stone material of the permutation and combination, rich and beautification of material of stone of beautiful decoration effect, make the natural stone material colour change gorgeous, such as malachite green (including FeO + Fe2O3:6.21%), forest green (including FeO + Fe2O3:5.31%), leopard PiHua (including FeO + Fe2O3:3.40%).
Second, LiuHuaTie is granite suffered from rust yellow pollution, it is one of the main reasons why under atmospheric easy weathering the hydrolysis, ferric oxide generated, and then further into limonite hydration. LiuHuaTie decomposition, sometimes leave cube pyrite illusion, some dissolution into many holes. If the iron oxide solution along cranny, so as to form the iron penetration dip, make stone film contaminated, form off color, reduce the stone decoration effect. Granite of the destruction of the second in the main reason for black mica, flake organization along the surface extremely easy stripped and easy weathering, weathered layer after falling off in stone material surface form small pit. In addition, black mica often caused by water solution role Fe3 + role, and the release of other minerals, rust dye serious rusty spot. Contain iron Ames stone namely chlorite kind of mineral is granite of the destruction of the third factor, they easily after weathering formed by the wind strings, soil water rushed, cause the stone surface holes and produce pits.
Three, iron-bearing minerals to the influence of the marble marble stone, in iron-bearing minerals have iron, LiuHuaTie carbonate, ferric oxide and silicate minerals containing iron etc. Exist in the marble iron-bearing minerals, because components of the role of the marble is different, the difference is very big. Iron dolomite can make the marble of gray, siderite brown, Angle flash of mineral stone revealed-green-black, green is erased, linear distribution, formed certain design, produce their own rich color changes; In addition, chlorite and ShiLiuShi will make a green or yellow marble. Marble stone material surface yellow rust from the main cause of the pyrite, followed by magnetic pyrite, nickel pyrite, etc LiuHuaTie mineral, its pollution causes and granite is same, LiuHuaTie decomposition, sometimes leave cube pyrite illusion, some dissolution into many holes (such as new cream-colored common in the marble plate 1 ~ 3 mm diameter empty). Iron and aluminum Ames stone, chlorite kind of mineral and contain iron shale fossil resistance of the weathering ability is bad, time is long also form pit and empty.
Four, including iron composition of stone material safety, the effects of the chemical composition, including stone within the discretion of the iron components though not fully determined stone material safety of high and low, but it is the stone material itself disease (rusty spot), the main reason for the safety of stone material influence is quite large. It is all iron-bearing minerals and attached in stone material surface with the sum of iron oxide iron content, general with FeO and Fe2O3 percentage (%) content, so the reaction said the original mineral composition of each contain much, also hard to define it fight decency ability. Previously described, whether granite or marble stone material, if contains iron ore content with more stable of iron ore implication from things primarily, but not LiuHuaTie, black mica and iron film, stone material which has strong weathering resistance of sex; Conversely, if the stone iron-bearing minerals mostly for the unstable LiuHuaTie, black mica, despite low amount of iron, stone material fight decency abilities may become worse.
In short, no matter be marble or granite stone iron-bearing minerals, the stability of the decision of material of stone of fight decency sex, numerous iron-bearing minerals, LiuHuaTie for the most unstable components, black mica is the second smallest, and furthermore to contain iron Ames stone and chlorite kind of minerals. Therefore, in the choice of stone material or appraisal stone lesions, attention shall be paid to the distribution of these harmful minerals, content and iron-bearing minerals weathering resistance, to ensure that the stone material of safety.
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