Products
Natural big Whitehead 
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The natural dolomite is mechanically crushed to manufacture calcium carbonate of different fineness. This category of calcium carbonate is called heavy calcium carbonate or ground calcium carbonate, whose quality is determined by the quality and fineness of the natural dolomite.
Calcium carbonate is an important inorganic compound, which is the most commonly used filler in manufacturing and processing industries. In general, calcium carbonate is widely used in rubber, plastics, papermaking, ink, paints, building materials, cropper, fruit farming, food products, medicine, etc. The manufactured process of calcium carbonate is universally generalized into two categories, and the properties of the two categories show slight variations. One is light calcium carbonate, which is achieved by chemical synthesis. The other is heavy calcium carbonate, which is achieved by physical pulverization. The major difference between the light and heavy calcium carbonates is the variations of the pH value, the fineness, and the particle shape. The light calcium carbonate is mainly spindle shaped, and the heavy calcium carbonate is mainly irregularly shaped. The different of the finesses and shape cause the variation of the bulk density (i.e. false specific gravity). There are currently two industrial methods used to make heavy calcium carbonate: One is the dry method, and the other is the wet method. The calcium carbonate made by the dry method is mostly used in the rubber, plastic, and painting industries, and the one made by the wet method is commonly used by the papermaking industry. We adopt the dry method to produce the heavy calcium carbonate. Among the various calcium carbonates, users could select the most suitable one based on applied conditions or individual purpose to achieve the expected effect.
Property |
CS-2200 |
CS-2000 |
CS-1800 |
CS-1600 |
CS-1400 |
CS-1200 |
SCP-1001 |
|---|---|---|---|---|---|---|---|
Mean Particle Size |
1.25 |
1.65 |
2.1 |
2.6 |
3.4 |
4.8 |
13 |
Surface Area |
21200 |
19400 |
17400 |
15600 |
13800 |
12000 |
5500 |
Bulk density |
0.72 |
0.80 |
0.86 |
0.92 |
0.98 |
1.08 |
1.30 |
True specific gravity (g/cm3) |
2.5~2.7 |
2.5~2.7 |
2.5~2.7 |
2.5~2.7 |
2.5~2.7 |
2.5~2.7 |
2.5~2.7 |
Whiteness |
95 |
95 |
95 |
95 |
95 |
95 |
90 |
Particle all passing point |
18 |
20 |
24 |
34 |
46 |
60 |
75 |
Max. residue on 325 mesh |
0.05% |
0.05% |
0.1% |
0.2% |
0.5% |
1% |
4% |
Oil absorption |
33 |
30 |
27 |
24 |
22 |
20 |
14 |
Water absorption (c.c/100g) |
35 |
32 |
30 |
27 |
24 |
22 |
17 |
Assay of CaCO3 |
97% |
97% |
97% |
97% |
97% |
97% |
95% |
Moisture (max.) |
0.5% |
0.5% |
0.5% |
0.5% |
0.5% |
0.5% |
0.5% |
Insoluble in HCl (max.) |
2.0% |
2.0% |
2.0% |
2.0% |
2.0% |
2.0% |
2.0% |
SiO2 (max.) |
1.2% |
1.2% |
1.2% |
1.2% |
1.2% |
1.2% |
1.2% |
MgO (max.) |
0.8% |
0.8% |
0.8% |
0.8% |
0.8% |
0.8% |
0.8% |
Fe2O3 (max.) |
0.3% |
0.3% |
0.3% |
0.3% |
0.3% |
0.3% |
0.3% |
Al2O3 (max.) |
0.3% |
0.3% |
0.3% |
0.3% |
0.3% |
0.3% |
0.3% |
Loss on ignition |
43±2% |
43±2% |
43±2% |
43±2% |
43±2% |
43±2% |
43±2% |
pH value |
8.5±1 |
8.5±1 |
8.5±1 |
8.5±1 |
8.5±1 |
8.5±1 |
8.5±1 |
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The appearance of the product is white powder, which is packaged in a three-layered kraft sack per twenty five kilograms or a bag per one thousand kilograms.
