Product introduction
Dry ramming material is made of high iron and high calcium synthetic magnesia and electrically soluble magnesia as aggregate, synthetic magnesia and electrically fused magnesia as fine powder, with critical particle size of 5-6mm, C2F (dicalcium ferrite) in synthetic magnesia as sintering aid, without any binder, and with multi-stage ingredients. Through the strong ramming construction, to ensure the density after construction, can be burned to form a solid whole under the appropriate temperature, its life is several times longer than the previous tying and bricklaying methods. In general, the one-time life of dry ramming material can reach more than 300 furnaces, and it can be extended to 500-600 furnaces through hot repair, which not only reduces the number of furnace stops, but also significantly reduces the consumption of per ton steel refractories.
Gunning mix (refractory gunning mix) is a kind of amorphous refractory material which is composed of refractory material, chemical binder and admixture with certain particle grading. It is used to repair the lining of thermal equipment by spraying construction method. It is a main type of spray material.
Main types
Product usage
(1) In general, only thin layer repair can be carried out for wet gunning.
(2) Dry gunning (also known as semi dry gunning) can be used for thick layer gunning and is widely used.
(3) Flame gunning can obtain a dense gunning layer with high bonding strength and strong erosion resistance.
According to the status of the material to be sprayed on the working face, it can be divided into:
(1) There are three kinds of spraying methods: flame spraying, plasma spraying and slag splashing.
(2) The cold material spraying method can be divided into five types: mud spraying method, dry spraying method, semi wet spraying method (or wet spraying method), mixed spraying method and wet spraying method.
technical parameter
|
Project indicators
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Spray paint
|
Ramming material
|
|
GNZP-1
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GNZP-2
|
GNZP-3
|
|
MgO,%
|
> 85
|
> 80
|
> 80
|
|
CaO,%
|
1～3
|
1～3
|
1～3
|
|
SiO2,%
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< 5
|
1～3
|
/
|
|
Fe2O3,%
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< 1
|
< 1
|
4～6
|
|
Compressive strength,Mpa
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110℃×16h
|
≥20
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≥15
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≥40(1300℃)
|
|
1500℃×3h
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> 30
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> 30
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≥80(1600℃)
|
|
Resilience,%
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< 10
|
/
|
|
Higher service temperature,℃
|
> 1800
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> 1700
|
>1700
|
|
purpose
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Repair of converter lining
|
Bottom of electric furnace
|
