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About Magnesite





Other Minerals

   We also export other minerals including dolomite, talc, potassium feldspar, albite, calcite, brucite, forsterite and all other minerals originated from the northeastern part of China especially from the Liaoning Province.

1. Dolomite

MgO (%) CaO (%) SiO2(%) Fe2O3(%) Size (mm)
21 30 ≤1.5 ≤1.0 natural lumps

   Calcined dolomite, featured by low bulk density, low intensity, high chemical activity, being prone to hydrate and becoming Ca(OH)2 and Mg(OH)2, is excellent slagging agent in steel-making; sintered dolomite may be made into doloset which is used for mending the linings of open hearth furnace and electric arc furnace as well as the major material for making tar pitch impregnated dolomite brick and dolomite-carbon brick.  

   It is composed of calcium-magnesium carbonate. Molecular formula is CaMg(CO3)2often presents white 
or gray white color with glass glance, hardness is 
3.5-4; brittle; specific gravity is 2.8-2.9. It is widely used as building material, chemical material, refractory, solvent etc.

2. Talc

    Talc is a mineral of magnesium silicate containing water, molecular formula is Mg3Si4O10(OH)2, presenting slight colors of whiteness, greenness, pink or gray, with glass glance; often forming a flaky or dense aggregate; hardness is 1; specific gravity is 2.7-2.8; with a  slippery and greasing feeling. It is widely used in fields of cosmetic, medicine, painting, paper making, ceramic, resin making etc.

Brand \ Specs SiO2 MgO Fe2O3 Whiteness(%) Size (mm)
lump Haicheng No.1 ≥60 ≥30 ≤0.3 ≥92 15-200
Haicheng No.2 ≥58 ≥30 ≤0.4 ≥90 15-20


Haicheng No.1 −60 ≥30 ≤0.3 ≥90 passing through
325 mesh ≥98%
Haicheng No.2 ≥57 ≥30 ≤0.4 ≥89 passing through
325 mesh ≥98%
Micronized ≥60 ≥30 ≤0.4 ≥90 1,250-4,000 mesh

3. Potassium Feldspar

     It is a silicate mineral rich in potassium, molecular formula is KAlSi3O8showing itself in gray-white color with glass glance; hardness is 6-6.5; specific gravity is 2.5-2.8. It is featured by low melting point, long time of melting intervals and higher viscosity of the melt. It is widely used in glass, porcelain enamel, ceramic, abrasive, fertilizer and chemical industries.
K2O (%)  Fe2O3(%) NaO(%) Size(mm)
≥11 ≤0.3 ≤1 natural lumps

4. Albite

    This is a silicate mineral rich in sodium, molecular formula is NaAlSi3O8, presenting gray,  yellow gray or milk gray color; with glass glance; hardness is 6; specific gravity is 2.61-2.76. Mainly used in glass, porcelain enamel and abrasive industries.
NaO (%)   Fe2O3(%) K2O (%)  Size (mm)
≥11 ≤0.3 ≤1 natural lumps


5. Calcite

     Calcite is one of very ordinary minerals, molecular formula is CaCO3, i.e. calcium carbonate; often shows itself in white or white gray color; with glass glance; hardness is 3; specific gravity is 2.6-2.8. It is widely used in fields of chemical industry, paper-making industry, building and decorating materials and art carvings.

CaO(%) MgO(%) SiO2(%)  Fe2O3(%) Whiteness(%) Size (mm)
≥54 ≤0.5 ≤0.5 ≤0.1 ≥92 natural lumps or powder

6.  Brucite

     Brucite is also called natural magnesium hydroxide, molecular formula is Mg(OH)2Theoretical contents are: MgO=69.0%, H2O=31.0%. Often shows itself in  white or white gray color, glass glance can be seen on fresh crystal surface, cuts or fracture; transparent; hardness is 2.5; specific gravity 2.3─2.6. Often presents a plate, fine flake, perfect round or abnormal grained-aggregate.

   Brucite has wide range applications, it is not only a kind of high grade refractory materials but also the best material for making magnesium metal. fibrous brucite,  due to its good fire retardancy, is ideal non-toxic, smokeless, non-polluting, and adding in high temperature flame retardant; fibrous brucite can be also used as intensifying and reinforcing material, additive for making water-proof and fire-proof paper. crude brucite can be used as the raw material for making nucleus reactor's protecting material; it can be also used for soil improvement, making fertilizer and regulating PH value of lakes; or naturally, it can be directly used as raw material for making lightweight magnesium oxide, magnesium silicate, magnesia cement, magnesium solder flux and handicrafts. 

Item MgO(%) SiO2(%) CaO(%) Fe2O3(%) Al2O3(%) L.O.I(%) Size(mm)


66.76 0.4 0.92 0.82 0.46 30.64 natural
Guaranteed ≥60 ≤1.0 ≤1.5 ≤1.2 ≤0.8 ≤35

7.  Forsterite

   This is a kind of minerals of olivine family , molecular formula is Mg2(SiO4) or 2MgO.SiO2,(shorted as M2S); its color is white, light yellow or light green; hardness is 6.5-7; density is 3.22-3.33g/cm3; lattice energy is as high as 17527.84J/mol; melting point is 1890 <C. Its main applications are as molding sand, sandblast abrasive, flux and slag-making material in iron-melting blast furnace as well as refractory materials in high temperature furnaces.
Name / Specs MgO(%) SiO2(%) Al2O3(%) Fe2O3(%) CaO(%) L.O.I.(%)
Raw Forsterite Typical
45.50 37.10 1.04 6.55 0.72 9.04
Dead Burned Forsterite 49.70 41.80 0.40 7.42 0.23 0.30

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