Processing Technology

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Application of Calcite powder

Calcite is one of the largest usage amount fillers in the rubber industry. Calcium carbonate can increase the volume of the rubber products, and save the consumption of the expensive natural rubber. Then it will save the cost.Calcite as the filer can increase the tensile strength, tear strength and abrasive resistance of the rubber products

Calcite Powder for Rubber Industry Standard(HG/T3249.4-2013)

Item GradeⅠ GradeⅡ Grade Ⅲ Grade Ⅳ Grade Ⅴ GradeⅥ
CaCo3 Content ≥95% ≥95% ≥95% ≥95% ≥95% ≥95%
Whiteness ≥94 ≥93.5 ≥93.5 ≥93 ≥93 ≥91
Oil-absorbed Value (g/100g) 39 37 37 35 33 30
Particle Size 2.5μm D50 3.0μm D50 3.5μm D50 4.5μm D50 -- --
6μm D97 8μm D97 11μm D97 13μm D97 23μm D97 45μm D97
Insoluble Matter in HCL ≤0.25% ≤0.5%
Activation Grade ≥95% ≥90%
Other Index Pb≤0.0010%, Cr(Ⅵ)≤0.0005%, Hg≤0.0001%, As≤0.0002%, Cd≤0.0002%
Calcite can play a role in the skeleton of plastic products. It can keep the stability of the plastic product shape. It can also increase the hardness and improve the surface gloss and surface smoothness of the plastic products.If the calcium carbonate whiteness above 90%, it can replace the expensive white pigment.

Calcite Powder for Plastic Industry Standard(HG/T3249.3-2013)

Item GradeⅠ GradeⅡ Grade Ⅲ Grade Ⅳ Grade Ⅴ GradeⅥ
CaCo3 Content ≥95% ≥95% ≥95% ≥95% ≥95% ≥95%
Whiteness ≥94 ≥94 ≥93 ≥93 ≥92 ≥92
Oil-absorbed Value (g/100g) 40 37 3 35 33 30
Particle Size D50 2μm 2.5μm 3μm 3.5μm 4μm 4.5μm
D97 5.5μm 6μm 8μm 9μm 11μm 13μm
Specific Surface Area(m2/g_ 5.5 5 3.2 3 2.5 2
105℃ volatile matter(w/%) ≤0.5
Other Index Pb≤0.0005%, Cr(Ⅵ)≤0.0003%, Hg≤0.0002%, As≤0.0002%, Cd≤0.0002%
Calcite in the water-based paint industry is more widely used. It can make the paint does not settle, easy to disperse, good gloss and other characteristics. The amount of water-based paint is about 20-60%.

Calcite Powder for Paint Industry Standard(HG/T3249.2-2013)

Item 2500 Mesh 2000 Mesh 1500 Mesh 1000 Mesh 800 Mesh
Super Grade First Grade Qualified Super Grade First Grade Qualified Super Grade First Grade Qualified Super Grade First Grade Qualified First Grade Qualified
CaCo3 ≥98% ≥96% ≥94% ≥98% ≥96% ≥94% ≥98% ≥96% ≥94% ≥98% ≥96% ≥94% ≥96% ≥94%
Whiteness ≥96% ≥94.5% ≥91% ≥96% ≥94.5% ≥91% ≥96% ≥94.5% ≥91% ≥96% ≥94.5% ≥91% ≥93% ≥91%
Specific surface area ≥6m2/g ≥5m2/g ≥3.2m2/g ≥2.5m2/g ≥2m2/g
Particle Size D50 ≤2μm ≤2.5μm ≤3μm ≤4μm ≤4.5μm
D97 ≤5μm ≤6μm ≤8μm ≤11μm ≤13μm
Oil Absorption ≤40g/100g ≤37g/100g ≤37g/100g ≤35g/100g ≤33g/100g
Pb (W/%) ≤0.0010
Cr(VI) (W/%) ≤0.0005
Hg (W/%) ≤0.0002
As (W/%) ≤0.0002
Cd (W/%) ≤0.0002
Remark Note: Pb=Plumbum; Cr=Chrome; Hg=Mercury; As=Arsenic; Cd= Cadmium
Calcite as the filler for paper, can guarantee the strength and whiteness of the paper. Then the less wood will be used, the cost is lower.

Calcite Powder for Paper-making Industry Standard(HG/T3249.1-2013)

Item GradeⅠ GradeⅡ Grade Ⅲ Grade Ⅳ
CaCo3 Content ≥98% ≥98% ≥98% ≥98%
Whiteness ≥95 ≥94 ≥94 ≥93
Oil-absorbed Value (g/100g) 35 33 31 29
Particle Size 4μm D50 4.5μm D50 - -
11μm D97 13μm D97 23μm D97 45μm D97
Insoluble Matter in HCL ≤0.25%
Dust(pc/g) ≤5
Other Index Pb≤0.0010%, Cr(Ⅵ)≤0.0005%, Hg≤0.0001%, As≤0.0002%, Cd≤0.0002%

Technical Data of Calcite for Paper-making Industry

  Filler Level First coat Level Topcoat Level
      Low Speed Mid&High Speed
  Low Speed Mid&High Speed Low Speed Mid&High Speed Common Quality High Quality Common Quality High Quality
Particle Size (μm) <15-40 <8-10 <10-15 <5-8 <8 <5 <5-8 <3
<2μm Content (%) 40-70 40-75 60-75 88-95 88-95 90-95 95-100
<1μm Content (%) 15-30 10-45 30-50 50-80 50-80 60-90 85-95
Residue Rate (%) ≦0.5 ≦0.2
Abrasiveness(copper net) mg/2000 times <15-10 <5 <8 <5 <5 <5 <3 <2
Abrasiveness(Polyester Net)mg/15h <30 <20 <20 <15 <15 <5 <10 <10
Whiteness (%) ISO 85-97 85-97 88-97 88-97 90-97 90-97 93-97 95-97
Acid non-soluble Substance (%) <0.2 <0.2 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02
Viscosity / mPa·S <40-100 80-200 <100-250 <100-250 <150-300 <150-300
Solid Content 70%-75% 70%-78% 70%-78% 70%-78% 70%-78% 70%-78%
Processing Technology Dry Wet Dry Wet Wet Wet Wet Wet

Note: Low Speed: 600 m/Min Mid and High Sped: 800-2000 m/Min

Calcite plays an important role in concrete in the construction industry. Not only can reduce production cost, but also can increase the toughness and strength of the product.
Dry Mortar Requirements: Particle Size: 325 Mesh Whiteness: 95% CaO3 Content: 98%

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