What is dolomite

Dolomite is the name of a sedimentary carbonate rock and a mineral, chemical formula of the crystal is CaMg (CO3) 2.
The composition consists essentially of dolomite:

Components	CaO	MgO	Al2O3	Na2	K2	SiO2	Fe2O3
(%)	31.70	20.60	0.06	<0.002	<0.002	0.30	0.04
Components	CO2	SO4	Sr	Li	B	Ti	Mn
(%)	47.30	0.13	0.06	<0.002	0.006	<0.002	0,1~1%

The mineral dolomite crystallizes in the crystal system 3, with light gray to pink color, pink dolomite as MnO higher rate. Dolomite has a hardness of from 3.5 to 4 Mohs; about 2.84 ~ 2.86 ratio. Dolomite soluble in water, slightly soluble in dilute HCl unless powdered.
Dolomite is one of the rare minerals, concentrated mainly in the provinces of Ha Nam, Ninh Binh, Hoa Binh, Phu Tho, Thai Nguyen, Ninh Thuan and Tay Nguyen.
Dolomite is used in many fields such as decorative stone; MgO material production; metallurgical additives; glass manufacturing, cement; ceramics; fisheries and food processing water in aquatic animal husbandry.
Dolomite rock with high Mn content are pink, are used as decorative stone, with elements of spirituality, health and bring peace to the users.
Dolomite merchandise is usually provided in the form of ground powder particle size from 10 micron to 200 micron, depending on the application.
- Dolomite used in metallurgical industry mainly in the form of calcined dolomite through the heat, with CaO content of about 50 ~ 56%; About 28 ~ 33% MgO, slag used to make insulating a liquid metal, liquid metal protective prevent oxidation, avoid melting of the wall oven and sulfur removal, phosphorus.
- Dolomite used in the aquaculture industry as a powder particle size of about 70 to 200 micron for water treatment ponds, creating alkaline water, providing macro elements and microelements in animal feed aquaculture.
- Dolomite is the main raw material for industrial production method calcined MgO over CaO temperature and separated by a chemical reaction or electrolysis.
- Dolomite is a component is used as a source of CaO in the glass manufacturing industry, cement
- Dolomite is used in the fertilizer industry, as a fertilizer additive, soil acidification handling, creating alkaline and provide trace elements to the soil.
- A large number Dolomite is used in industries producing ceramics.
For many applications in industry, Dolomite is used for large. However, due to the processing technology of Vietnam is limited and minerals companies in Vietnam are mainly provided in the form of crude ore, unprocessed, yet meet the needs of the market, therefore, annual Vietnam still has to import from China Dolomite powder in bulk.

Dolomite products

1 Ore Dolomite:
- Dolomite Ore with the following main components:

Component	CaO	MgO	Al2O3	Na2	K2	SiO2	Fe2O3
(%)	31.70	20.60	0.06	<0.002	<0.002	0.30	0.04
Component	CO2	SO4	Sr	Li	B	Ti	Mn
(%)	47.30	0.13	0.06	<0.002	0.006	<0.002	0,1~1%

- Crude ore with ~ 50cm-sized 30cm: Made in factory price: 350,000d / ton-Dolomite Ore is mined in open pit mines in Phu Tho, Hoa Binh and Son La, transported, assembled at the factory Port 3 level, Thai Thinh Ward, Dist. Peace.
- Raw ore to the size of 1cm ~ 5cm; Made in factory price: 450,000d / ton
2 calcined dolomite ore overheating
- Ore Dolomite heat baked the basic components CaO (50 ~ 56%); MgO (28 ~ 33%)
- Ore Dolomite calcination temperatures are too many applications in the fields of cement, glass, steel.
- Ore Dolomite calcination temperature with size less than 1 mm, made ​​in the workshop price: 800,000d / ton
3 Dolomite powder
- Dolomite powder were recruited through the mill and grind sizes from 200 micron to 10 micron, depending on the application.
- Dolomite powder additive applications for many industries such as aquaculture feed, fertilizer, seed production of plastic, glass, cement, paint, paper, rubber, ceramic tiles, ceramics ...
- Dolomite powder is packed in 50kg, factory price as the table below:

Size	70 micron	45 micron	28 micron	15 micron	10 micron
Cost (vnđ/ton)	1,000,000	1,500,000	1,800,000	2,300,000	2,500,000

Dolomite in fisheries

Dolomite is one of the indispensable components in the field of aquatic animal husbandry, especially shrimp. Dolomite is used for water treatment, increased levels of alkaline water, providing trace elements and macro feed for aquaculture.
1 Dolomite Water treatment
Dolomite used in water treatment as:
- Nutritional imbalance with humus and peat organic matter
- Ao have soft water with low alkalinity
- Ao affected by acidity
Meanwhile, Dolomite powder sprinkled on the pond will take effect:
- Neutralize acid, increasing the pH of the water and pond bottom
- Increase CO2 for photosynthesis of plant plankton
- The precipitate colloids in water
- Increasing levels of photphorus substrate, reducing dissolved photphorus
- Provide the macro elements such as Ca, Mg, P, Na, K, Cl and trace elements such as Fe, Mn, B, Mo, Cu, Co, Zn ... food for aquatic and create a favorable environment for algae growth.
When Dolomite powder in water treatment, can determine the amount of Dolomite powder to sprinkle according to the pH of the pond declined as follows: if the pH is below 6 uses 100kg / 1 hectare; if 6 <pH <7.5 using 50 kg / ha.

Dolomite in steel

Dolomite is used as a flux in metallurgy, particularly the steel industry with the aim of creating an environment Bagio, slag, prevent oxidation and protect the liquid metal, limiting the walls of the furnace melts , phosphorus and sulfur removal.
In furnaces, while blending components MgO train no, if not enough magnesium supplements, wall oven will risk decomposed to MgO in the slag. Therefore, additional Dolomite will slow down the decomposition process of the furnace wall.
In the alkaline oven, CaO is an important component creates an alkaline environment, reduced activation of the Fe
in slag, slag promote faster, protecting the liquid metal surface, avoiding oxidation of the liquid metal.
Dolomite components have a certain amount of Si and Mn in effect Oxygen reduction smelting metal.
Dolomite is often used in metallurgy in lump form, the best size is about 1 ~ 3 cm.
Dosage depends on the type of furnace and smelting technology.

What is MgO

MgO is magnesium oxide is the chemical formula MgO, also called Magnesia; MgO density is 3,58g / cm3, the thermal expansion is 0.026, melting point is 2852oC.
MgO has wide applications in the refractory industry, metallurgy, cement, ceramics, glass, insulation material and dairy foods.
With important applications in many manufacturing industries, annual, MgO is used for large, however, in Vietnam there is no more supply unit MgO; Enter mostly from China.
Commercial MgO is usually provided in the form of active MgO, MgO and MgO calcined calcined process, the components MgO and different purposes:
- Active MgO with MgO> 84% is used the most in the field of dairy food, fertilizer, chemical production, sugar production, paper, leather, cement production Sorel cement, glass, lubricants, synthetic resin production.
- MgO calcination process with MgO> 90% is used mainly in the production of refractory materials.
- Fused MgO with MgO> 96% is used in the manufacturing sector refractory and insulating materials

Products of MgO

MgO is manufactured from Dolomite by removing CaO technology. MgO we provide basic content as follows:

Components	Mg+2	Ca+2	SiO2	Al2O3	Fe2O3	Na2O
(g.dm3)	86.7	0.78	0.03	0.02	0.02	0.001
Components	K2O	SO4	Sr	Li	B2O3	Ti
(g.dm3)	0.004	0.9	0.42	0.006	0.03	0.006

MgO is supplied as a powder particle size depending on the manufacturing sector; is packed with 50kg weight / bag.
Commercial MgO have 3 types:
1 active MgO, MgO is heated to 700 to 1000 ° C, with MgO> 85%
2 calcined MgO is MgO calcination process at temperatures between 1500 and 2000oC, with MgO> 90%
3 calcined MgO is MgO calcined at temperatures above 2700oC, with MgO> 96%
MgO is used in many manufacturing sectors, depending on the type of MgO with different applications:
MgO activity has many applications in the manufacturing industry:
- MgO feed in the dairy industry, additional MgO help avoid muscle spasms in cattle.
- MgO fertilizer application in the industry, helps prevent yellowing disease, increased pH, acidic soil removal
- MgO applications in the chemical industry, salt production Mg
- MgO active ingredients used in producing calcined MgO and MgO melting process
- MgO applications in the footwear industry, in alkaline stages in the tanning process
- MgO application in the sugar industry, reduced deposits on the pipe
- MgO applications in the paper industry, to create Magne bisunfit in wooden cooking stage
- MgO applications in the construction industry, for the production of cement Sorel
- MgO applications in the glass industry for the manufacture of special glass, fiberglass
- MgO applications as a lubricant in the lubricant manufacturing industry
- MgO as a filler, acid neutralizing agents and thickeners catalyst in the production of plastics
- MgO as a raw material producing fireproof material, particularly against fire in plastics
- MgO used in water treatment, precipitating heavy metals, controlling the formation of H2S in water
- MgO excipients used in the manufacture of vitamin pills, stomach antacids, laxatives
2 Application of the calcined MgO
Calcined MgO is MgO so baked at temperatures between 1500 and 2000oC, with a MgO> 90%.
MgO calcination process commonly used in the production of alkaline refractory materials used in the metallurgical industry.
3 Application of calcined MgO
Calcined MgO is MgO is heated at temperatures above 2700oC, with MgO> 96%.
Fused MgO is used mainly in the production of alkaline refractory and insulating materials.
Fused MgO with MgO> 96%, the ratio CaO / SiO 2 is 2: 1 is used in the production of refractory materials.
Fused MgO with MgO> 98%, the ratio CaO / SiO 2 is 1: 2 is used in the manufacture of the Material insulation.
The cost of production at the factory depending on the type as follows:

Products	MgO 3	MgO 2	MgO 3
%MgO	>84%	>90%	>96%
Cost ( vnđ/ton)	3,200,000	5,800,000	12,500,000

Application of MgO

MgO is a product with many applications in different industries. Depending on the type of product that MgO different applications.
1 Application of active MgO
MgO MgO activity is baked at temperatures ranging from 700 to 1000 degrees, with the following basic components:

Components	Mg+2	Ca+2	SiO2	Al2O3	Fe2O3	Na2O
(g.dm3)	86.7	0.78	0.03	0.02	0.02	0.001
Components	K2O	SO4	Sr	Li	B2O3	Ti
(g.dm3)	0.004	0.9	0.42	0.006	0.03	0.006

MgO activity has many applications in the manufacturing industry:
- MgO feed in the dairy industry, additional MgO help avoid muscle spasms in cattle.
- MgO fertilizer application in the industry, helps prevent yellowing disease, increased pH, acidic soil removal
- MgO applications in the chemical industry, salt production Mg
- MgO active ingredients used in producing calcined MgO and MgO melting process
- MgO applications in the footwear industry, in alkaline stages in the tanning process
- MgO application in the sugar industry, reduced deposits on the pipe
- MgO applications in the paper industry, to create Magne bisunfit in wooden cooking stage
- MgO applications in the construction industry, for the production of cement Sorel
- MgO applications in the glass industry for the manufacture of special glass, fiberglass
- MgO applications as a lubricant in the lubricant manufacturing industry
- MgO as a filler, acid neutralizing agents and thickeners catalyst in the production of plastics
- MgO as a raw material producing fireproof material, particularly against fire in plastics
- MgO used in water treatment, precipitating heavy metals, controlling the formation of H2S in water
- MgO excipients used in the manufacture of vitamin pills, stomach antacids, laxatives
2 Application of the calcined MgO
Calcined MgO is MgO so baked at temperatures between 1500 and 2000oC, with a MgO> 90%.
MgO calcination process commonly used in the production of alkaline refractory materials used in the metallurgical industry.
3 Application of calcined MgO
Calcined MgO is MgO is heated at temperatures above 2700oC, with MgO> 96%.
Fused MgO is used mainly in the production of alkaline refractory and insulating materials.
Fused MgO with MgO> 96%, the ratio CaO / SiO 2 is 2: 1 is used in the production of refractory materials.
Fused MgO with MgO> 98%, the ratio CaO / SiO 2 is 1: 2 is used in the manufacture of the Material insulation.

MgO in the refractory

Special applications and most of MgO is used in manufacturing refractory alkaline.
MgO has a very high melting temperature, up to 2850oC, alkaline nature (pH up to 10.3) and anti-wear properties and corrosion. Therefore, the most used in the production of refractory materials alkaline nature. The main application of refractory alkaline properties as metal, steel smelting, cement kilns and pottery kilns.
For production of refractory materials, often using MgO calcination temperature overheat or MgO 1500 and 2000oC melting at temperatures above 2700oC. In particular, fused MgO abrasion resistant, chemically inert and the durability is higher than MgO calcination process, should be used as a refractory material quality, the metal bucket and metal liners, the refined metal barrel ...

MgO production

Around the world, often using technology MgO produced from magnesite ore baked or prepared from border countries.
- Preparation of MgO from seawater, sea brine is based on the following reaction:
MgCl2 + CaO + H2O ----> Mg (OH) 2 + CaCl2
in which sea water after removing impurities and SO2, are heated to temperatures obtained through MgCl2, then reacted with CaO and water at high temperatures to form Mg (OH) 2 and CaCl2, the separation of CaCl2 to be Mg (OH) 2. Pyrolysis of Mg (OH) 2 to form MgO. This method is usually obtained with high-quality MgO.
- Magnesite ore used in the production of mainly MgO Dolomite. Technology MgO from dolomite production is mainly based on the following reaction:
CaMg (CO3) 2 + H2O → CaCO3 + MgCO3 + H2O + CO2 ↑
which, Dolomite ore is heated and reacts with water to form slurry CaCO3 and MgCO3, then reacts with HCl to form CaCl2 and MgCl2; remove CaCl2 for MgCl2, then baked at high temperature and react with water to obtain Mg (OH) 2, Mg firing continued (OH) 2 to MgO.

About us

Peace Dolomite is a trademark of Industrial Minerals Company in peace. With over 10 years of construction and development, Dolomite Hoa Binh is one of the popular brands on the market.
With 4 Dolomite mining area in the province of Hoa Binh, Phu Tho, Son La with total reserves of about 45 million tonnes, a capacity of around 25 thousand tons / month, we can provide products in bulk and Dolomite stable, long-term:
Our Dolomite Mines:
- Dolomite Mines in Tan Minh, Da Bac district, Hoa Binh province
- Dolomite Mines in Tien Son commune, Luong Son district, Hoa Binh province
- Dolomite Mines Thu Ngoc Commune, Tan Son district, Phu Tho province
- Dolomite Mines in Ta Phu, Moc Chau district, Son La province
Production capacity:
- 02 factory in Hoa Binh, with a total area of ​​up to 50,000m2
- 01 mill ultrafine particle size MT188 (5 ~ 40 micron); capacity of 4.5 thousand tons / month
- 01 mill grained 4R size (28 ~ 70 micron); capacity of 7.5 thousand tons / month
- 04 mill 3R fine grain size (40 ~ 200 micron); capacity of 30 thousand tons / month
Human capacity:
- With a total staff of over 300 employees who
- There are 03 branches in Hoa Binh, Hanoi and HCMC. Ho Chi Minh City, is ready to meet the needs of customers nationwide.
- There are 01 research laboratories develop products with many years of experience in applied research, consultancy and ready to test applications for clients in all sectors.
We are proud to be the exploitation, production and supply of quality products and the most practical applications for customers in Vietnam market.