PRODUCT Precipitated Calcium Carbonate

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Precipitated Calcium Carbonate

model Precipitated Calcium Carbonate

Product Description

Calcium carbonate is an immensely crucial inorganic salt material, serving as one of the most commonly used fillers in the manufacturing and processing industries. Its widespread applications encompass rubber, plastics, paper production, ink formulation, paint manufacturing, construction materials, agriculture, and fruit cultivation, among other fields.

Depending on the production methods, calcium carbonate can be classified into two main forms, each characterized by distinct physical and chemical properties. One form is synthesized through chemical reactions, known as "light calcium carbonate." The most notable differences between precipitated and ground calcium carbonate lie in their pH values, fineness, and particle shapes. Precipitated calcium carbonate typically exhibits a spindle-like shape, while ground calcium carbonate features irregular particles. These variations in particle size and shape contribute to differences in oil absorption capacity and bulk density.

Among the diverse and distinctive types of calcium carbonate products available, users can select the most suitable specifications based on their application environment or specific requirements to achieve the desired outcomes.

Product Details

Specification

Raw Materials Used

Natural Limestone Lump
Coke

Process Overview

Selected natural limestone is subjected to calcination to break down into calcium oxide (CaO), followed by digestion with water (H₂O) to produce calcium hydroxide (Ca(OH)₂) slurry. After refining and purification of the slurry, it is exposed to carbon dioxide to generate calcium carbonate (CaCO₃) slurry. This slurry then undergoes dehydration, drying, and grinding before being packaged as the final product.
This type of calcium carbonate is known as light calcium carbonate or precipitated calcium carbonate, abbreviated as light CaCO₃. The quality of light calcium carbonate is influenced not only by the quality of the natural limestone but also by factors like limestone calcination and lime milk carbonation conditions. Additionally, the dry grading fineness of the powder is also a significant factor.

Product Features

Compared to ground calcium carbonate, the particles of precipitated calcium carbonate are smaller, with excellent fineness.
High whiteness and superior color.
Low impurities and high purity.
Primary particle structures are spindle-shaped and cubic.
Good dispersibility of the product.
High-quality product, suitable options can be chosen based on considerations like apparent density and oil absorption.

Applications

Used in industrial products such as rubber, plastics, etc.: Calcium carbonate serves as a filling agent for these materials. In the rubber industry, it is widely utilized in products like tires, tapes, hoses, rubber components, and more. In the plastics field, it finds applications in various plastic products such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS, nylon, etc. Light calcium carbonate can be used not only as a standalone reinforcing filler but also in combination with other fillers like carbon black, white carbon black, clay, titanium dioxide, etc. to achieve reinforcement, filling, color adjustment, improvement in processing properties and product performance, as well as reduction of rubber content or substitution of expensive white fillers.
Used in paint products: Including synthetic resin paints, glazes, oil-based paints, latex paints, primers, and white line coatings.
Used in agriculture and livestock: Soil improvement, agricultural crop protection agents, fertilizers, feed additives, and even cultivation of mushrooms (such as shiitake).

Packaging

25 kg woven bags
1000 kg jumbo bags

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Property	B -201	A-101	A -201
Particle Size Distribution (μm)	0.6~1.2	0.8~1.5	1.0~2.5
Specific Surface Area (cm²/g)	55,000	45,000	36,000
Loose Bulk density (g/cm³)	0.22	0.25	0.33
True specific gravity (g/cm³)	2.6	2.6	2.6
Whiteness	100	100	100
Residue on 250 mesh	≦ 0.1%	≦ 0.1%	≦ 0.1%
Oil absorption (DOTP, ml/100g)	50	44	38
Moisture	0.4%	0.3%	0.2%
Insoluble in HCl	≦ 1.5%	≦ 1.5%	≦ 1.5%
Loss on ignition	43.5%	43.5%	43.5%
pH value	8~10	8~10	8~10
Assay of CaCO₃	99%	99%	99%

(The above data is provided as an average reference for testing purposes)

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