Abrasion Characteristics of Ground Calcium Carbonate Products

The main objective of this paper handsheet study is to investigate if a hybrid filler material containing wood flour and precipitated calcium carbonate can replace and/or supplement commercially available ground calcium carbonate and precipitated calcium carbonate mineral filler material for papermaking. The handsheet study contains 25 different furnish mixtures. Four different types of wood flour were used to manufacture the hybrid filler material, including two wood flour blends with a strengthening agent. All handsheet were manufactured with an 80% harwood and 20% softwood mix. The filler content varied between 10, 15 and 20%. The study showed that the hybrid filler material achieved a retention of up to 92.68% as well as a higher caliper of up to 208 μm compared to commercial ground and precipitated calcium carbonate of 120.4 μm and 145.6 μm respectively. Tensile and tear strength did not show an improvement. Elongation and tensile energy absorption did improve of up to 30% with the strength additive containing hybrid filler material. Opacity was improved of up to 10% with the hybrid filler material. Brightness and color values were lower due to the natural brow color of the wood flower material.

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Effects of Rotation Speeds and Media Density on Ground Calcium Carbonate during Ultrafine Grinding Process in Planetary Mill

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.997.542 ◽

2014 ◽

Vol 997 ◽

pp. 542-545

Author(s):

Yan Ru Chen ◽

Yi Chen Lu ◽

Xiao Min Lian ◽

Chao Yang Li ◽

Shui Lin Zheng

Keyword(s):

Particle Size ◽

Calcium Carbonate ◽

Rotational Speed ◽

Planetary Mill ◽

X Ray Diffraction ◽

X Ray ◽

Dry Grinding ◽

Ultrafine Grinding ◽

Effects Of Rotation ◽

Ground Calcium Carbonate

Superfine ground calcium carbonate (GCC) produced by carbonate minerals is a widely used inorganic powder material. In order to get a finer GCC powder with narrow distribution span, the effect of rotational speed and media density on ground GCC were studied by dry grinding GCC in a planetary ball mill under different rotational speed and various media density. The grinding limit-particle size and distribution of grinding calcium carbonate were measured by centrifugal sedimentation granulometer. The structure of GCC was measured by X-ray diffraction. The result shows that low rotational speed and high-density media is conducive to get a product with smaller particle size and narrow size distribution; crystal plane (012) and (122) are more stable than (018) and (116).

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Chemical Property of Ground Calcium Carbonate as Carbon Dioxide Absorbent

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.2923 ◽

2010 ◽

Vol 654-656 ◽

pp. 2923-2926 ◽

Cited By ~ 2

Author(s):

Seiji Yokoyama ◽

Nik Hisyamudin Muhd Nor ◽

Shunsuke Hirano

Keyword(s):

Carbon Dioxide ◽

High Temperature ◽

Calcium Carbonate ◽

Physicochemical Properties ◽

Specific Heat ◽

Chemical Property ◽

Emission Rate ◽

Dissociation Reaction ◽

Dissociation Pressure ◽

Ground Calcium Carbonate

Commercial sedimentation CaCO3 was ground by a vibration rod mill to investigate the physicochemical properties of mechanically activated CaCO3.When the CaCO3of the calcite structure was ground, the intensities of the crystal facesof calcite was decreased by distortions and so on, and the aragonite appeared as the grinding proceeded. The formed aragonite was transformed to the calcite when the sample was heated at 773K for3.6 ks. The dissociation pressure of CO2 of the ground CaCO3was larger than that of the non-ground CaCO3.The enthalpy; entropy and specific heat of change of the dissociation reaction were obtained. At high temperature, the emission rate of the ground CaCO3 was slightly larger than that of the non-ground CaCO3. At room temerature, the CaCO3 adsorbs CO2, and it desorbs the adsorbed CO2. The amount of adsorbed CO2 on the ground CaCO3 was larger than that of the non-ground CaCO3.

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