Calcium metasilicate
Calcium metasilicate
CAS: 13983-17-0
Molecular Formula: CaO3Si
Calcium metasilicate - Names and Identifiers
| Name | Calcium metasilicate |
| Synonyms | fw50 fw325 gilbertite cab-o-lite Wollastokup Aedelforsite dab-o-litep4 fw200(mineral) fw200[mineral] C.I.PigmentWhite28 CalciumMetasilicate Wollastonite Powder Calcium metasilicate |
| CAS | 13983-17-0 |
| EINECS | 237-772-5 |
| InChI | InChI=1/Ca.O3Si/c;1-4(2)3/q+2;-2 |
Calcium metasilicate - Physico-chemical Properties
| Molecular Formula | CaO3Si |
| Molar Mass | 116.16 |
| Density | 2,9 g/cm3 |
| Melting Point | 1540°C |
| Storage Condition | Room Temprature |
| Stability | Stable. |
| Refractive Index | 1.62-1.64 |
| Physical and Chemical Properties | wollastonite is a kind of calcareous metasilicate mineral. Triclinic system, fine plate-like crystals, assembly of radial or fibrous. The color is white, sometimes with a light gray, light red tone. Glass luster, cleavage surface is pearl luster. Hardness 4.5~5.5, density 2.75~3.10g/cm3. The coefficient of thermal expansion is 6.5 × 10-6 ℃-1, the relative density is 2.8, the melting point is 1540 ℃, and the refractive index is 1.62. Completely soluble in concentrated hydrochloric acid. Under normal circumstances, acid, alkali and chemical corrosion resistance. Hygroscopicity is less than 4%. Low oil absorption, low electrical conductivity, good insulation. Wollastonite is a typical metamorphic mineral, which mainly occurs in the contact zone of acid rock and limestone, and is symbiotic with the stone and garnet. It is also found in deep metamorphic calcareous Crystal schist, volcanic ejection and some alkaline halite. |
| Use | wollastonite can be used as extender and extender in coating industry. Because it can increase the bright color tone of the white paint, and can maintain this color tone for a long time. The needle-like crystallization of wollastonite makes it a good safety agent for coatings and can improve the leveling of coatings. The particle shape of wollastonite makes it a good suspending agent for coating, which makes the precipitation of color paint soft and easy to disperse. It can be used as a reinforcing agent in self-cleaning coatings. Wollastonite powder is alkaline, very suitable for polyvinyl acetate coating, so that the color pigment dispersion is uniform. Wollastonite also has the ability to improve the corrosion resistance of metallic paints. In addition to being used for water-based coatings, it can also be used for primer, intermediate coating, oil coating, road marking coating, etc., and can replace asbestos in asphalt coating. In the latex paint can partially replace the titanium dioxide, while not making the whiteness |
Calcium metasilicate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37 - Irritating to eyes and respiratory system. |
| Safety Description | S22 - Do not breathe dust. S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| TSCA | Yes |
Calcium metasilicate - Nature
Open Data Verified Data
wollastonite is calcium metasilicate mineral, theoretical chemical composition: Ca0 48. 25%, Si0251. 75%. Pure wollastonite is rare in nature. In the process of its formation, Ca is sometimes partially replaced by Fe, Mn, Ti, Sr plasma, and mixed with a small amount of Al and trace K, Na. Due to the different formation conditions of wollastonite, there are three kinds of homogeneous multi-images: low temperature triclinic wollastonite (a-CaSi03), auxiliary wollastonite (a,-CaSi03) and pseudo wollastonite (p-CaSi03). At present, low-temperature triclinic wollastonite is mainly used as a raw material for industrial minerals. Low temperature triclinic wollastonite is triclinic system, mostly needle-like, fibrous or plate-like. It is white, gray and red, with glass luster. Density 2. 78~2.9lg/cm3, hardness 4.5~5, melting point 1540. The coefficient of thermal expansion is low, and the coefficient of thermal expansion is 800 × 10-6mm/(mm) at 25~6.5 ℃. C); At about 1125 C can be converted to pseudo wollastonite, then the coefficient of thermal expansion increases, and due to the release of Fe, Sr and other impurities, so the color changed from white to cream, red or brown.
Last Update：2024-01-02 23:10:35
Calcium metasilicate - Preparation Method
Open Data Verified Data
- the grade of wollastonite ore in China is high, and the special grade, grade 1 and Grade 2 wollastonite ore blocks can be obtained by simple screening. Wollastonite processing is mainly the use of wollastonite ore blocks, using a variety of grinding and ultra-fine grinding equipment to produce various specifications of wollastonite powder, or surface modification.
- preparation of wollastonite powder each ore block that has been sorted to remove impurities is sent to a jaw crusher for coarse and medium crushing, and then it is put into lemon mill or other dry grinding equipment for grinding, and 200 mesh is obtained through cyclone classification, 325 mesh wollastonite powder. The ordinary powder is then fed into a fluidized bed type or other type of jet mill for ultra-fine pulverization to obtain ultra-fine wollastonite powder or acicular wollastonite powder of less than 1 μm.
Last Update：2022-01-01 09:07:23
Calcium metasilicate - Use
Open Data Verified Data
mainly used in the ceramic industry. Because wollastonite has good electrical insulation properties, high impact strength and shape stability, this characteristic makes wollastonite used in precision ceramics and process ceramics. Adding appropriate amount of wollastonite in ceramic raw materials can greatly reduce the sintering temperature, realize low-temperature and rapid sintering, and save energy. In the glaze mud raw materials, wollastonite is used instead of white pigment, can increase the gloss of the glaze, reduce the viscosity of the glaze mud, greatly reduce the cost. Wollastonite can prevent the cracking, micro-cracking, breakage and enamel defects of porcelain in ceramic products. The properties of the polymer can be improved by adding an appropriate amount of wollastonite to the rubber plastic. In addition, wollastonite is widely used in metallurgical fields such as metal casting mold coating, molten steel, refractory brick, refractory insulator, ceramic insulating foam and so on. If wollastonite forms a non-conductive crystal, it will have a high insulation ratio and can be used in high-quality electrical equipment.
Last Update：2022-01-01 09:07:23
Calcium metasilicate - Safety
Open Data Verified Data
wollastonite block granular products can be bulk or bag, when the bulk is directly loaded into the transport car, the product should be prevented from mixed pollution. The bag is packed with woven bags, and the weight is according to the user's requirements. Wollastonite powder products are packed in woven bags lined with plastic bags. The package should be marked with the product. Different grades of products should be stacked separately. Mixing and mixing are strictly prohibited. The stacking site should be clean, ventilated and dry. During transportation, other impurities should be prevented from mixing and polluting the product, and attention should be paid to rain-proof, snow-proof, anti-broken package, and prevention of mixed products of different grades.
Last Update：2022-01-01 10:58:15
Calcium metasilicate - Reference Information
| (IARC) carcinogen classification | 3 (Vol. Sup 7, 68) 1997 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | wollastonite is usually white, slightly gray, red, flaky, radial or fibrous aggregate, mainly produced in the contact metamorphic zone of limestone and acid magmatic rock. |
| application | wollastonite is a single-chain silicate mineral, usually in the form of needle, flake, radial or fibrous aggregate, with good dielectric properties, high whiteness, high heat and weather resistance, widely used in ceramics, metallurgy, papermaking, plastics, coatings and other fields. |
| production status | China is one of the major wollastonite producers in the world and is rich in wollastonite resources. Recently, a super-large wollastonite deposit with reserves of more than 0.1 billion tons was discovered in Tengchong area of Yunnan Province, which is the largest wollastonite deposit in the world. There are producing areas in Hubei, Jilin, Liaoning, Fujian, Hunan, Jiangxi, Zhejiang, Xinjiang, Qinghai, Hebei and other provinces. The development of wollastonite products industry in China has broad prospects. |
| use | wollastonite can be used as a body pigment and extender in the coating industry. Because it can increase the bright tone of white paint and maintain this tone for a long time. The needle-like crystallization of wollastonite makes it a good safety agent for coatings and can improve the leveling of coatings. The particle shape of wollastonite makes it a good suspending agent for paint, making the precipitation of paint soft and easy to disperse. It can be used as a reinforcing agent in self-cleaning coatings. Wollastonite powder is very alkaline and is very suitable for polyvinyl acetate coatings to make the dispersion of coloring pigments uniform. Wollastonite also has the ability to improve the corrosion resistance of metallic paint. In addition to water-based coatings, it can also be used for primer, intermediate coating, oily coating, road sign coating, etc., which can replace asbestos in asphalt coating. Titanium dioxide can be partially replaced in latex paint without reducing whiteness and hiding power. It can also be used in metallurgy, ceramics, welding rods, plastics, rubber and other industries. wollastonite can be used as a filler for rubber, plastic, resin, paint and coating. It is also widely used in ceramics, metallurgy, construction, machinery, electronics, welding, papermaking, agriculture and automobile industry. Wollastonite has broad development prospects. |
| production method | domestic wollastonite mines that have been developed and utilized are all open-pit mining. The degree of mechanization is low. The beneficiation method varies with its output characteristics and ore types. The widely used methods include hand separation, photoelectric sorting, magnetic separation, flotation, electric separation, gravity separation, etc. The flotation method is adopted for the beneficiation of wollastonite ore in Lishu County, Jilin Province, and the technological process is as follows: The domestic wollastonite mines that have been developed and utilized are all open-pit mining. Low degree of mechanization. The beneficiation method varies with its output characteristics and ore types. The widely used methods include hand separation, photoelectric inspection, magnetic separation, flotation, electric separation, gravity separation, etc. Flotation method is adopted for wollastonite in Lishu County, Jilin Province. The technological process is as follows: raw ore → grinding → calcite roughing → two sweep → two sweep → calcite → concentrate twice sweep → quartz three flotation → wollastonite concentrate |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Product Name: Calcium metasilicate Request for quotationCAS: 13983-17-0
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Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3787852685
Product Name: Calcium silicon trioxide (wollastonite) Visit Supplier Webpage Request for quotation
CAS: 13983-17-0
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Mobile: 18021002903
QQ: 3008007409
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CAS: 13983-17-0
Tel: 18301782025
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Mobile: 18021002903
QQ: 3008007409
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