Light calcium carbonate is much more expensive than specific calcium, why use light calcium?

The heavy calcium carbonate and light calcium carbonate you mentioned are just the same chemical formula and similar appearance, but in essence, there are great differences in both their physical and chemical properties and processing methods.

First of all, the processing methods of the two products are different:

The processing of heavy calcium carbonate is mainly achieved by mechanical crushing and grinding; The production of light calcium carbonate is produced by precipitation by chemical reactions. The latter process is much more complex than the former, and the requirements are correspondingly more stringent.

Secondly, the physical and chemical indicators of the two products are different, and the differences are as follows:

1) The bulk density is different This is the most obvious difference between the two, the bulk density of heavy calcium carbonate is, the bulk density of light calcium is only, and the bulk density of nano calcium carbonate products can reach below.

The whiteness of heavy calcium products is relatively large, and the whiteness is generally 89 93%, while the whiteness of light calcium products is generally 92 95%, and some products can reach 96 97%, which is the main reason why light calcium products are often used in high-grade or light-colored products.

The moisture content of heavy calcium products is low, but also relatively stable, generally, some high-grade heavy calcium products can even reach; The moisture of light calcium products is general, and the moisture stability is poor, and sometimes there are certain fluctuations.

Different particle sizes Heavy calcium products are currently only micron-sized products, and the particle size is generally larger, which is significantly larger than the light calcium particle size. Different crystal forms Heavy calcium products are all irregular forms, also known as amorphous, while the crystal forms of light calcium products are generally more regular, such as ordinary light calcium is mainly spindle-shaped, while nano-calcium carbonate is mainly cubic crystal form.

The third application process is different Heavy calcium products are mainly used in papermaking, rubber, plastic and other industries, with a large filling amount, mainly as a volumetric filler, while light calcium has a wider range of applications, mainly based on volumetric fillers, and the ultra-fine (commonly known as nano-scale) calcium carbonate has the dual role of functional filler and volumetric filler, and the filling amount is less.

To sum up, because heavy calcium cannot replace light calcium, the processing cost gap and application scope of the two are different, resulting in a large difference.

Heavy calcium carbonate equipment and light calcium carbonate equipment** and manufacturers.

Because light and heavy calcium cannot be replaced in these aspects, if you can, you don't have to wait for you to ask, it has been replaced a long time ago.

The main differences are that the properties are different, the physical and chemical properties are different, and the applications are different, as follows:

First, the nature is different.

1. Heavy calcium. Heavy calcium generally refers to heavy calcium carbonate, which is made by grinding natural carbonate minerals such as calcite, marble, and limestone.

2. Light calcium. Light calcium is light calcium carbonate, also known as precipitated calcium carbonate, referred to as light calcium.

Second, the physical and chemical properties are different.

1. Heavy calcium. Due to the large particles, smooth surface and small specific surface area, heavy calcium carbonate has a low oil absorption value, which is about 48ml 100g. Heavy calcium carbonate is stable in air. Almost insoluble in water, insoluble in alcohol.

In case of dilute acetic acid, dilute hydrochloric acid, and dilute nitric acid, bubble boiling, and dissolve. Heating to 898 begins to decompose into calcium oxide and carbon dioxide.

2. Light calcium. In 825 decomposed. Melting point 1339 . There are two forms: amorphous and crystalline, and the crystalline shape can be divided into orthorhombic crystal system and hexagonal crystal system, which is columnar or diamond-shaped.

Insoluble in water and alcohol. It is soluble in acid and releases carbon dioxide at the same time, showing an exothermic reaction. Also soluble in ammonium chloride solution.

Stable in the air with a slight moisture absorption capacity.

Third, the application is different.

1. Heavy calcium. It is widely used in rubber industry, plastic industry, paint industry, water-based coating industry, paper industry, construction industry, fireproof ceiling industry, artificial marble industry, floor tile industry, etc.

2. Light calcium. It can be used as a filler in industries such as rubber, plastics, paper, coatings and inks. It is widely used in the production of organic synthesis, metallurgy, glass and asbestos.

Heavy calcium is the abbreviation of heavy calcium carbonate, and light calcium is light calcium carbonate.

Heavy calcium is the abbreviation of heavy calcium carbonate, which is made by grinding natural carbonate minerals such as calcite, marble and limestone;

The main component of lime calcium is a mixture of Ca(OH)2, Cao and a small amount of CaCO3, which is a refined product of lime, which is made of natural high-quality limestone with CaCO3 as the main component, which becomes quicklime (CaO) after high temperature calcination, and then selects, partially digested, and then crushed by high-speed winnowing hammer crusher;

Light calcium is light calcium carbonate, also known as precipitated calcium carbonate, referred to as light calcium, which is to burn limestone and other raw materials into lime and carbon dioxide, and then add water to digest lime to produce lime milk (the main ingredient calcium hydroxide), and pass carbon dioxide carbonized lime milk to generate calcium carbonate precipitation, which is prepared by dehydration, drying and crushing. Or it can be prepared by metathesis reaction of sodium carbonate and calcium chloride to generate calcium carbonate precipitate, which is prepared by dehydration, drying and crushing.

1. Different methods of obtaining.

Light calcium carbonate is a calcium carbonate product obtained by chemical methods, and heavy calcium carbonate is a calcium carbonate product obtained by physical methods.

2. The content of raw materials is different.

Heavy calcium carbonate is generally made of limestone with high purity, and light calcium carbonate can choose limestone with low purity.

3. The properties of raw materials are different.

Light calcium carbonate usually has a high whiteness, the national standard for whiteness is above 90, and the sedimentation volume is higher, generally above. The density of heavy calcium carbonate is heavier than that of light calcium carbonate, and the whiteness is generally lower, the sedimentation volume is lower, and the particle size is difficult to be finer.

The role and use of light calcium carbonate is very wide, calcium carbonate is one of the earliest and largest large fillers used in the rubber industry, calcium carbonate is filled in a large number of rubber, which can increase the volume of products, so as to save expensive natural rubber to achieve the purpose of reducing costs. Calcium carbonate can play a skeleton role in plastic products, which has a great effect on the dimensional stability of plastic products and can improve the hardness of products.

What is the difference between light calcium carbonate and heavy calcium carbonate.

Heavy calcium carbonate, or heavy calcium for short, is made by grinding natural carbonate minerals such as calcite, marble, and limestone. It is a commonly used powdered inorganic filler, which has the advantages of high chemical purity, high inertness, not easy to chemical reaction, good thermal stability, no decomposition below 400, high whiteness, low oil absorption, low refractive index, soft quality, dryness, no crystal water, low hardness, low abrasion, small bright and high key, non-toxic, tasteless, odorless, and good diffusion.

Both of them have the formula of caco3.

The difference between heavy calcium carbonate and light calcium carbonate: different weights, different properties of raw materials, different content of raw materials, and different methods of acquisition.

1. Different weights: heavy calcium carbonate has a heavy surface area, and light calcium carbonate has a light surface area.

2. The properties of raw materials are different: the whiteness of the national standard is above 90, and the volume of sedimentation is relatively high. Light calcium carbonate usually has a higher whiteness, while heavy calcium carbonate has a lower whiteness and a lower sedimentation volume.

3. The content of raw materials is different: heavy calcium carbonate uses limestone with high purity, while light calcium carbonate uses limestone with low purity.

4. Different acquisition methods: heavy calcium carbonate is a calcium carbonate product obtained by physical methods, and light calcium carbonate is a calcium carbonate product obtained by chemical methods.

1. Heavy calcium carbonate is referred to as heavy calcium, which is processed into white powder with high-quality calcite as raw material, its main component is CaCO3, insoluble in water and ethanol, with high whiteness, good purity, soft hue and stable chemical composition, etc., it is the most inorganic filler used in industry.

Heavy calcium is usually used as a filler, and is also widely used in artificial floor tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, building supplies, food, medicine, textiles, feed, toothpaste and other daily chemical industries, as a filler to increase the volume of products and reduce production costs.

Used in rubber, can increase the volume of rubber, improve the processability of rubber, play a semi-reinforcing or reinforcing role, and can adjust the hardness of rubber. Used in chemical building materials, it has the characteristics of heat resistance, chemical corrosion resistance, cold resistance, sound insulation, shock proof and easy processing, etc., and can be used as doors, ceilings, wall panels, upper and lower water irrigation, stair handrails, floors and wires, etc., in oil-based coatings, heavy calcium is used as a filler, which can play a skeleton role.

In plastics, it can increase the volume of plastics, reduce product costs, improve the dimensional stability of plastics and the hardness and rigidity of plastics, improve the processing properties of plastics, improve the heat resistance of plastics, and improve the astigmatism of plastics. To make pulp materials, make full use of the characteristics of high whiteness, good hydrophilicity and high impact strength of heavy calcium.

Heavy calcium carbonate can have the characteristics of heat resistance, chemical corrosion resistance, cold resistance, sound insulation, shock resistance and easy processing, and is used in chemical building materials, building ceramics and floor tiles, doors, ceilings, wall wrenches, upper and lower water irrigation, stair handrails, floors and wires, etc. It can also be used in papermaking, coatings, paints, PVC profiles, artificial leather, PVC gussets, medicine, food, cosmetics, inks, etc.

2. Light calcium carbonate is made of limestone as raw material, mainly used as a filler in rubber, plastic, papermaking, coatings, inks and other industries, and can be used in daily chemicals such as tooth powder, toothpaste, cosmetics, etc., and can also be used in organic synthesis, metallurgy, glass and asbestos production.

Heavy calcium is washed in natural ore and ground to paint to whiteness and fineness.

Light calcium is CaCO3 calcined in water soluble, post-treatment, to obtain CaCO3

Third, in the application of coatings.

1. Heavy calcium is relatively safe, and the dry hiding power is not high. It is not as good as light calcium whiteness, but it is cheaper.

2. If the light calcium is used carelessly, it is easy to cause serious post-thickening, and the most serious is the agglomeration of the paint. The oil absorption is much larger than that of calcium, and the alkalinity is also relatively high.

3. The dry covering power of light calcium is much higher than that of heavy calcium, and it is also white with specific calcium.

Summary. Pro, light calcium carbonate is an economical filler, and at the same time, it also has a modifying effect, and is widely used in silicone glue (commonly known as glass glue), coatings, rubber, papermaking, pipes, plates, medicines, pigments, profiles and other fillers. Advantages:

It has good affinity with PVC, rubber or other adhesives, etc., to achieve the dual role of filling and reinforcement, and the filling amount is large, which can reduce the amount of silicone glue, rubber or other adhesives; It can be used as a fine colorant and increase gloss and smoothness. Increase the thermal insulation of the coating, form a shielding effect on the coating or other adhesives, effectively achieve the purpose of anti-ultraviolet aging and anti-heat aging, extend the storage life and stability of the coating, reduce production costs, and improve market competitiveness. <>

What is the solids content of light calcium carbonate related to.

How to increase the solids content of light calcium carbonate?

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The solid content of light calcium carbonate is related to the production process<>

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Expand knowledge, improve the content of light carbonated liquid or calcium, 1. Change the mixture calcination to batch or direct firing calcination, change the intermittent carbonization to continuous carbonization, select suitable or buried surface treatment agents and modification processes, and whiten technology and measures <>

Pro, light calcium carbonate is an economical filler, and at the same time, it also has a modifying effect, and is widely used in silicone glue (commonly known as glass glue), coatings, rubber, papermaking, pipes, plates, medicines, pigments, profiles and other fillers. Advantages: Good affinity with PVC, rubber or other adhesives, etc., to achieve the dual role of filling and reinforcement, large filling amount, such as Yuxian can reduce the amount of silicone glue, rubber or other adhesives; It can be used as a fine colorant and increase gloss and smoothness.

Increase the thermal insulation of the coating, form a shielding effect on the coating or its Patrick adhesive, effectively achieve the purpose of anti-ultraviolet aging and anti-heat aging, extend the storage period and stability of the coating, reduce production costs, and improve market competitiveness. <>