| Our company KAYRA Mining has been performing sales of industrial components such as calcite, barite and olivine crushedly in a craft or big bag packaging in domestic and foreign markets.. More »
CALCITE
| Mineral lime Stones which are produced with calcite name in our country, are main minerals of carbonated rocks as marble, chalk. It is that exists in varied forms with vitreous brightness, is in colourless transparent stucture. It is ground easily and then its color is white. After grinding in micron dimensions, it is a filling element which is used as much as possible in many sectors as paint, paper, filling, plastics, |
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soil, etc. for whiteness, abrasive and because of particularity of attemping to resistance against the erosion.
We can arrange in order use of calcites which were ground in micron dimensions as wet or dry:
- Paper Sector
- Paint Sector
- Plastics Sector
- Adhesives
- Food Sector
- Ceramics Sector
OLIVIN
Mining of olivin is fairly new when comparing with other minerals. Since recent 15-20 years olivin have been a quitely important mineral at the iron-steal-casting sectors of Europe and developed countries in the world because of its both chemical and physical characteristics.
Olivin have went on increasing fastly because of being more cheap than alternative mines with consumption of olivin by the laws which were regulated in order to prevent for taking a risk in the side of health, work and environment |
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health of developed countries in the world, furthermore by being forbidden the usage of mineral and raw material that include silica.
BARITE
Barite is the main resource of barium. It is colourless but sometimes it might be yellow or grey. Usage areas:
- Drilling
- Chemical
- Filling materials
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Most of barite is used by grinding as contrubution material in the industrial products or as contrubution material that makes gravity while digging a pit of petroleum or natural gas. Barite is used in making of paint and paper.
Barite is a clean, relatively soft, virtually inert and quite inexpensive mineral with a specific gravity of over 4.Barite utilized as a weighting agent in the drilling fluid or “mud” used in drilling deep wells by the rotary method can constitute up to 40% of the mud’s constituents and this use accounts approximately 95% of total barite consumption.
The properties noted for drilling muds plus its light color and high brightness (up to 90+%), low oil absorption and wettability by oils allow barite to be used as a filler and weighting agent; acoustical compounds, adhesives, athletic goods (bowling, golf, tennis balls), carpet backing, friction materials, linoleum, mold release agent, paints (primer- automative & appliance, topcoats – automative, gloss enamels, powder coatings, semigloss & gloss latex, and industrial & architectural coatings), paper (bristolboard, heavy printing paper, playing cards), radiation shielding, rope finishes, rubber (floor mats, white-walled tires, tires for heavy construction vehicles), urethane foams. Brightness may be increased through bleaching with sulfuric acid.Other relevant properties include thermal stability (1.580 degrees Celcius), thermal conductivity (0.006 cal/cm), specific heat (0.11 cal/gC), dielectric constant (7.3), and coefficient of thermal expansion (0.000006).
For higher purity and brightness, synthetic barium fillers are used; BaS + zinc sulfate coprecipitated and calcined to give Lithopone, a mixture of 70% BaSO4 and 30% ZnS (white pigment in paint and artists’ colors) BaS + Na2SO4 precipitated to give BaSO4 (blanc fixe) with a brightness of 95-99%, average particle size 0.5-4 microns, specific gravity 4-4.2 and hardness 3-4 is used as a filler (paint, rubber, inks, photographic paper) and in medicine (barium meal in X-rays, pharmaceuticals).
Barite is used as a source of BaO in glassmaking where it acts as a flux, oxidizer and decolorizer to giving the finished glass greater brilliance and clarity.The high specific gravity is used in the construction industry to give weight down underwater pipelines.Barite absorbs gamma radiation and can replace lead in nuclear shielding. High purity barite is a feedstock for the chemical industry. Lump barite and finely powdered coal heated to 1.250-1.350 degrees in a rotary kiln to form 80-85% barium sulfide (black ash) which is dissolved in water and filtered to pure BaS as a precursor for a range of barium chemicals; |
