Refractory gunning mass for blast furnace infrastructure (lining repair)
The mixture ratio of blast furnace gunning mass needs to meet the following conditions:
It achieves the required strength, less rebound, less spray dust, good adhesion and no blockage of the conveying pipe, etc.
The blast furnace refractory gunning mix is divided into three types according to the order of adding water (or solution) and the amount of water used, such as wet method, semi-dry method and dry spray coating.
The series of gunning mass for blast furnace infrastructure produced by our company have the advantages of easy spraying construction, high strength and high refractoriness, which can significantly improve the service life of blast furnaces and are suitable for blast furnaces constructed by various mechanical spraying methods.
|Al2O3 (%) ≥||35||40||40||45||55|
|Fe2O3 (%) ≤||/||1||1.5||/||/|
|Bulk density (g/cm3) ≥||110℃×24h dry off||1.8||2||2||2||2.1|
|Bending strength (MPa) ≥||110℃×24hdry off||3||3||3||4||5|
|3h after burning||4||5||5||6||6|
|Linear change rate (%)||3h after burning||±1.0||±1.0||±1.0||±1.0||±1.0|
|Application||Upper part of blast furnace lining||Rise/drop tube||Gas sealing plate||Lower part of furnace to the abdomen||Upper part of blast furnace lining|