Dolomite Minerals For Sale

Dolomite minerals for sale in bulk and with the best price of the market. Sellers, suppliers and exporters of dolomite minerals.

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Type 1: DOLOMITE

What is Dolomite?

Dolomite rock is a rock that is present in several formations of the geological register from the Palaeozoic to the Tertiary periods. It is a rock composed especially of dolomite, double carbonate of Ca and Mg. Dolomites are not usually found in pure state, as dolomite forms a series of continuous transition with calcite. The theoretical chemical composition of pure dolomite is, in weight, 30.4% of CaO, 21.9% of MgO and the rest CO2. Among its applications we can find the production of aggregates for construction and the chemical industry. Also, the manufacture of dolomitic marbles and other ornamental materials.

Manufacturing Process

Our dolomites dome from limestones formed by marine sedimentary processes that, in contact with magnesium-enriched water, undergo the dolomitization process. This is the first process, which nature carries out over millions of years. From there, and near our main deposit, we established our Crushing, Grinding and Classification Plant, where we carry out the dolomite process. Once the final product is obtained, it is classified in various grain sizes, adapting to the requirements of each sector targeted.

Ca Mg (CO3)2

Type 2: CALCINED DOLOMITE

What is Calcined Dolomite?.

Calcined dolomite is obtained by the calcination of dolomite, with a high content in calcium and magnesium carbonate CaMg(CO3)2. This product has mainly steel applications to improve slagging and to lengthen the lifespan of the refractory linings of ovens and ladles. Also, in metallurgy, chemistry, manufacture of refractory bricks and in stabilization in the process of manufacture of glass, improving its resistance to the aggression of gases and humidity. It can also be used in waste water and sludge treatment, as well as in fertilization and conditioning of terrains.

Manufacturing Process

The calcined dolomite is obtained from heating of the crude dolomite to 800ºC in a horizontal oven. Once the final product is obtained, it is classified in various grain sizes, adapting to the requirements of each sector targeted.

Ca Mg (CO3)2 + Tª (800ºC) -> CaO MgO calcined+ 2CO2

Type 3: DEAD BURNED DOLOMITE (DBD)

What is Dead Burned Dolomite?

Sintered Dolomite, also known as Dead-Burned Dolomite (DBD), is the product resulting from calcining the dolomite from 1,400ºC to 1,800ºC for a period of time, thus obtaining magnesium oxide crystals (periclase) and of calcium oxide. This product is an alternative to Magnesite. It is mainly used for the Refractory Industry as an element in formulation of "Tempered" pieces as "Baked". With these pieces the ladles for casting of scrap metal are configured. At the same time, it is an essential ingredient for the production of "Masses" for slabs and refractory gunites.

Manufacturing Process

Crude Dolomite, after passing through the calcination process and in the same industrial area is made into Sintered Dolomite, generating a new mineral: Periclase. This process is carried out with a vertical oven with temperatures of over 1,800ºC. Once the final product is obtained, it is classified in various grain sizes, adapting to the requirements of each sector targeted.

CaO MgO calcined + Tª (>1.800ºC) ° CaO MgO PERICLASA (Mg Oxide Crystals).​

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MAIN USES OF DOLOMITE

IN THE STEEL INDUSTRIE AS:

*Purifying action in steels.

*Protective action of refractory lining.

IN THE MANUFACTURE OF FLAT GLASS:

*Improves stability.

*Decreases tendency to devitrification.

*Increases viscosity of the glass.

*Lengthens the thermal interval of moldability.

*Increases resistance to abrupt temperature changes.

*Allows reduction of % of Silica and quantity of fluxes.

IN ECOLOGICAL AGRICULTURE:

*Allows neutralization of soil acidity (AMENDMENT).

*Soil conditioning, so that the crop assimilates the nutrients in optimal conditions.

*Eliminates the phytotoxicity of aluminium, a basic element of silicates, by transformation of other ionic types that are non-toxic for crops.

*Reduces solubility of heavy metals.

*Ca/Mg status regulator of soils, its adaptation for agricultural use.

Magnesium is a component of chlorophyll, necessary for the development of the chemical process of plant photosynthesis.

*Products in oxide form are assimilated and quickly correct the pH of the soil while carbonates have medium-term assimilation and regulating effect.