- Product Brief:Mineral & Metals Agents
- Brand Name: DOLOMITE (CaMg(CO3)2
- Minimum Order Quantity: Negotiable
- Product Description:
Dolomite, composed of calcium and magnesium carbonate (CaCO3.MgCO3), has a theoretical composition of 45.65% MgCO3 and 54.35% CaCO3. In addition to its importance as crushed stone, it has a wide variety of industrial applications. It is used in the steelmaking industry as a flux and for manufacture of refractories for basic open hearth furnaces, Bessemer converters and steel ladles. In the cement industry it is used in refractories which line rotary cement kilns. It is an ingredient in the manufacture of plate glass and fibreglass, and has agricultural applications as a fertiliser, soil conditioner and stockfeed supplement.
The specific gravity of dolomite is 2.85. This means that a pure dolomite weighs 2.85 times as much as an equal volume of pure water. The specific gravity of a mineral can be used to help distinguish it from other minerals. The hardness of dolomite is 4 on the Mohs hardness scale. This means it is harder than a piece of copper ( a penny, for example) and softer than mild steel (like a knife blade). The hardness of a mineral is also another characteristic used to identify it from other minerals.
Dolomite is used as an ornamental stone, a concrete aggregate and as a source of magnesium oxide. It is an important petroleum reservoir rock, and serves as the host rock for large strata-bound Mississippi Valley-Type (MVT) ore deposits of base metals (that is, readily oxidized metals) such as lead, zinc, and copper. Where calcite limestone is uncommon or too costly, dolomite is sometime used in its place as a flux (impurity remover) for the smelting of iron and steel.In horticulture, dolomite and dolomitic limestone are added to soils and soilless potting mixes to lower their acidity ("sweeten" them). Home and container gardening are common examples of this use.
The inherent differences between dolomite and calcite drive the applications for dolomite. Dolomite is chosen for many construction and building product applications due to its increased hardness and density. Asphalt and concrete applications prefer dolomite as a filler for its higher strength and hardness. Dolomite also finds use in a number of applications as a source of magnesium such as glass and ceramics manufacture, as well as a sintering agent in iron ore pelletization and as a flux agent in steel making. Farmers use dolomite for agricultural pH control. The chemical industry uses the mineral dolomite in making magnesium salts including magnesia, magnesium oxide (MgO), which is used in pharmaceuticals.
Dolomite is chiefly used as refractory, ramming, and fettling material in steel melting shop, and as fluxing material in blast furnace operation in secondary steel and ferromanganese manufacture. To a lesser extent it is used in the glass industry especially in sheet-glass manufacture. It also finds use in the manufacture of mineral wool.
In England, dolomite has become a useful source for the production of magnesite by reacting calcined dolomite with sea-water. The UK is meeting nearly 50% of her magnesite requirements by this method. Dolomite is also a good source of magnesium metal. The magnesium metal is extracted from dolomite by the well-known fero-silicon process.
dolomite lime is the best to raise ph of peat based soiless mixes, plus is a source of calcium and magnesium. Dolomite acts slowly and continuously, while the hydrated lime acts almost instantly. You can get dolomite in two forms, granular and powdered. The granular is better over time, while the powdered will start working sooner. A mix of the two is best for all around use, but for short term use like what we are doing, finer is better. As peat and other organic amendments breas down, acids are created that raise your ph out of the recommended ph range. Adding about 5 cups of lime per commercial bale of soiless mix will conteract this rise. I add 1 to 2 tbsp per gallon of soiless mix. It is very important not to overlime. Too much will lead to iron chlorosis and reduces the availability of manganese to your plants.
แPands Group’s dolomite mine is situated at Tambon Wangdong, Ampur Muang, Kanchanaburi. The ore is found in the rock of Permian period, which is comprised of dolomite, marble, phyllite, and quartzite. Dolomite forms white, gray to pink, commonly curved crystals, although it is usually massive. The Mohs hardness is 3.5 to 4. Its formation is taken place by dolomitization; the perfect substitution of magnesium in calcium carbonate in the sea water. The high temperature is likely to speed up the movement of calcium and magnesium ions so that they can find their places in the ordered structure. Pands Group’s mine at Kanchanaburi has approximately 150-200 metric tons of dolomite.
Mining and Production
Pands Group’s dolomite mine at Kanchanaburi is the most abundant one in Thailand, with homogeneous quality. The mine is in the form of open pit and operated by benching method, according to academic theory and engineering standard. The raw ores will be ground and selected by innovative machine to produce the ore of required size. Each year, the company can produce about 800,000-100,000 metric tons of dolomite, which can be further applied in many industries, such as iron smelting, construction material, glass industry, and agriculture. We are the first dolomite enterprise to be awarded as an outstanding mine in 2008 and certified with ISO 14001-2004 | 9001-2000.
MINE LOCATION ORE RESERVES (TONS) Year 2008 MINING CAPACITY (TONS/M)
Kanchanaburi 200,000,000 136,000
SPECIFICATION CHEMICAL ANALYSIS SIZE
MgO 21.00 % Min 325 Mesh
CaO 30.00 % Min 150 Mesh
SiO2 0.05 % Max 40-80 Mesh
Al2O3 0.02 % Max 16-150 Mesh
Fe2O3 0.05 % Max 0-6 mm
Total < 20,000,000 6-15 mm
Ceramic,Glass, Still Mill, Roof tile, Agricuture, Constructions 10-35 mm
Granulated for Agriculture
- Place of Origin: Thailand
- Delivery Time:3 Days
- Product Description: