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Calcium carbonate (conversional)
Calcium carbonate (technological chalk)
Strontium carbonate
Calcium carbonate (conversional) (synthetic chalk, lime carbonate)
Technical specifications (TU) 113?08?667?98
CaCO3
Use:
Calcium carbonate (conversional) – by-product of NPK production – is used:
- in agriculture as material for liming of hyper-acidic soils;
- in construction and industry as construction material; as raw material for lime, lime cements and glass production; as an additive for paints, fillings and other finishing materials, rubber blends, paper, plastics, linoleum, sculpture works and for other purposes.
Characteristics:
Fire dangerous and explosive product. Class of hazard with regard to impact on human body – 3.
Calcium carbonate is shipped in bulk by rail and by road in accordance with the rules for the corresponding kind of transport
Guaranteed shelf life:
6 months.
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Quality chatacteristocs |
grade B |
|
First class |
Second class |
|
1. Appearance |
Microcrystallic free-running white product |
|
2. Total content of calcium and magnesium carbonates, in calcium carbonate equivalent, %, min |
90 |
85 |
|
3. Water content, %, max |
1,5 |
2,0 |
|
4. Total strontium content, in strontium equivalent, %, max |
1,2 |
1,2 |
|
5. Sieve residual content 1 mm , %, max |
6 |
6 |
|
6. Content of toxic elements mixtures incl. cadmium, arsenic, hydrargyrum, and plumbum, % |
The product is to meet the TU requirements |
Calcium carbonate (technological chalk)
Technical specification (TU) 95?2317?91
CaCO3
Usage:
There are 2 types of calcium carbonate (technological chalk) – “K” type and “C” type.
K type product is used in paint and varnish industry for production of paints and finishing materials
C type product is used in glass industry for glass production.
Characteristics:
The product is easily flammable and explosive, in pure form it is non-toxic, but calcium phosphates and fluorides and strontium carbonates that the calcium carbonate contains as mixtures increase its toxicity.
Package:
The product is packed in PE bags, five-layer bitumen-impregnated or laminated as well as FIBCs.
Transportation:
The product is shipped by rail and by road in accordance with the shipping rules for the corresponding kind of transport.
Guaranteed shelf life:
6 months.
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Quality characteristics |
К type |
С type |
|
1. Whiteness, %, min |
90 |
no standard |
|
2. Calcium carbonate content, %, min |
90 |
90 |
|
3. Water content, %, max |
1 |
1 |
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4. Content of agents soluble in water, %, max |
1 |
1,5 |
|
5. Sand content, %, max |
0,5 |
0,5 |
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6. Particles retained on sieve with mesh No. 016, %, max |
0,5 |
0,5 |
|
7. Content of ammonium nitrate in water extract, %, max |
no standard |
0,2 |
Information: calcium carbonate contains mixtures of calcium fluoride (up to 1% of weight), calcium phosphate ( up to 2 % of weight), and strontium carbonate (up to 1,5% of weight).
Strontium carbonate
Technical specification (TU) 95?2326?91
SrCO3
Usage:
The product is used in electronic and metallurgic industry, construction and other branches of industry:
- in production of color TV picture tubes, where the chemical absorbs X-rays created by the electrons that hit the screen (retardation radiation);
- during production of ferrostrontium powders, which are used for production of magnetic ceramic ferrites (constant magnets);
- in zinc electro winning technologies: strontium carbonate is added to electrolyte in form of suspension that allows to produce zinc without lead mixtures
- in ceramic and glass industry in production of fire-resistant ceramics and glazes replacing zinc, magnesium, calcium, lead, it is also possible to to use strontium carbonate for crystal glass production
- in pyrotechnics;
- in processes of the following strontium compounds production:
- Strontium chromate – anticorrosion coloring agent in paints for aluminum alloys (in aviation and shipbuilding);
- Strontium chloride;
- Metallic strontium used in metallurgy to improve cast iron and steel quality as well as to modify Al and Si alloys in welding electrodes;
- Strontium hydroxide for production of strontium and lithium-strontium soaps, which are the basis for grease lubricants;
- Strontium phosphate – component of luminiscent materials;
- Strontium oxide;
- Strontium perchlorate;
- Strontium fluoride.
Strontium carbonate is produced by nitric-acid apatite decomposition method without use of sulphur and chlorine containing reagents
Depending on the major element there fractional makeup there are 3 kinds of strontium carbonate: Ag, Ap, Bg, Bp, Cg, Cp (“p” and “g” stand for powder and granules correspondingly)
Characteristics:
Solid friable material of white or light-gray color, easily flammable and explosive.
Package:
The product is packed in FIBCs.
Transportation:
The product is shipped by rail and by road in accordance with the shipping rules for the corresponding kind of transport.
Guaranteed shelf life:
not limited.
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Quality characteristics |
Аг |
Ап |
Вг |
Вп |
Сг |
Сп |
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1. Strontium carbonate content, % |
min 97,0 |
min 97,0 |
94-96 |
94-96 |
min 95 |
min 95 |
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2. Calcium carbonate content, % |
0,3-1,0 |
0,3-1,0 |
0,3-1,5 |
0,3-1,5 |
0,3-1,5 |
0,3-1,5 |
|
3. Barium carbonate content, %, max |
1,2 |
1,2 |
4 |
4 |
1,5 |
1,5 |
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4. Potassium content, in Na2CO3 equivalent, %, max |
1,0 |
1,0 |
1,0 |
1,0 |
1,0 |
1,0 |
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5. Iron content, in Fe2O3 equivalent, %, max |
0,01 |
0,01 |
0,01 |
0,01 |
0,01 |
0,01 |
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6. Sulphur content, in SO3 equivalent, %, max |
0,1 |
0,1 |
0,1 |
0,1 |
0,15 |
0,15 |
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7. Phosphates content, in Р2O5 equivalent, %, max |
0,01 |
0,01 |
0,01 |
0,01 |
0,01 |
0,01 |
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8. Content of chlorides, in Cl - equivalent, %, max |
0,01 |
0,01 |
0,01 |
0,01 |
0,015 |
0,015 |
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9. Content of residue not soluble in hydrochloric acid, %, max |
0,1 |
0,1 |
0,25 |
0,25 |
0,25 |
0,25 |
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10. Moisture content, %, max |
0,3 |
0,3 |
0,3 |
0,3 |
0,3 |
0,3 |
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11. Bulk density, g/sm3, min |
1,8 |
no standard |
1,8 |
no standard |
1,6 |
no standard |
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12. Residual on sieve with mesh No. 1,6 according to GOST 6613 |
absent |
absent |
absent |
absent |
absent |
absent |
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13. Pass through mesh No. 0,1 according to GOST 6613, %, max |
20 |
no standard |
20 |
no standard |
20 |
no standard |
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14. Content of magnetic inclusions with the size over 250mkm under magnetic field intensity of not less then 1,2х106 А/М (15000 oersteds), created in 138?Т-SEM magnetic separator gap under current 7,5 А, % |
absent |
no standard |
absent |
no standard |
absent |
no standard |
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