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Dolomite (CaMg(CO3)2), dead-burned refractory

Product Name
Dolomite (CaMg(CO3)2), dead-burned refractory
CAS No.
69227-00-5
Chemical Name
Dolomite (CaMg(CO3)2), dead-burned refractory
Synonyms
Dolomite (CaMg(CO3)2), dead-burned refractory
CBNumber
CB9888050
Molecular Formula
O3)2
Formula Weight
0
MOL File
Mol file
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Dolomite (CaMg(CO3)2), dead-burned refractory Property

EPA Substance Registry System
Dolomite (CaMg(CO3)2), dead-burned refractory (69227-00-5)
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Hazard and Precautionary Statements (GHS)

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Dolomite (CaMg(CO3)2), dead-burned refractory Chemical Properties,Usage,Production

Description

Calcined dolomite or simply dolomite or dolomite (i.e., CaO + MgO) is a product produced by calcination at relatively low temperatures and is highly porous and reactive. Like other carbonates, upon heating above 900°C dolomite decomposes completely into a mixture of calcium and magnesium oxides, and carbon dioxide:
CaMg(CO3)2(s) —> CaO(s) + MgO(s) + 2CO2(g)

Uses

Dead burned dolomite exhibits high refractoriness and can withstand temperatures up to 2300°C. It is widely used as a refractory material wherever steel is refined using basic slag. It is used for original hearth installations in open hearth furnaces as well as for hearth maintenance. These hearths are installed using tar-dolomite ramming mixes and rammed dolomite. Dolomite refractories are also used in electrical furnaces and in the cement industry during clinker manufacture.

Preparation

Dead burned refractory dolomite is produced in vertical shaft or rotary kilns. Generally high-purity dolomite, with total impurities of less than 3 wt.%, is selected. As it is difficult to densify high-purity dolomite in a rotary kiln, it is customary to use some mineralizers to facilitate sintering. Iron sesquioxide is a common additive. The manufacturing process varies with the grade of dead burned dolomite needed. Most plants use rotary kilns lined in the hot zone with basic bricks and fired with powdered coal. The temperature reached in the hot zone is ca. 1760°C or above when iron oxide is added. After dead burning, dead burned dolomite is cooled in either rotary or reciprocating recuperative coolers. The air used for cooling gets heated and is again used as secondary air for combustion in the kilns.

Dolomite (CaMg(CO3)2), dead-burned refractory Preparation Products And Raw materials

Raw materials

Preparation Products

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Dolomite (CaMg(CO3)2), dead-burned refractory Suppliers

Hefei TNJ Chemical Industry Co.,Ltd.
Tel
0551-65418684 +8618949823763
Fax
0086-551-65418684
Email
sales@tnjchem.com
Country
China
ProdList
25363
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58
career henan chemical co
Tel
+86-0371-86658258 15093356674;
Fax
0086-371-86658258
Email
factory@coreychem.com
Country
China
ProdList
29826
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Henan Tianfu Chemical Co.,Ltd.
Tel
+86-0371-55170693 +86-19937530512
Fax
0371-55170693
Email
info@tianfuchem.com
Country
China
ProdList
21700
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55
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View Lastest Price from Dolomite (CaMg(CO3)2), dead-burned refractory manufacturers

Career Henan Chemical Co
Product
Dolomite (CaMg(CO3)2), dead-burned refractory 69227-00-5
Price
US $1.00/KG
Min. Order
1KG
Purity
85.0-99.8%
Supply Ability
20 tons
Release date
2019-12-24

69227-00-5, Dolomite (CaMg(CO3)2), dead-burned refractoryRelated Search:


  • Dolomite (CaMg(CO3)2), dead-burned refractory
  • 69227-00-5
  • O32