The refractory ramming material is prepared from a high proportion of granular and powdery materials and a very low proportion of binders and other components, even all of which are composed of granules and powders, and are subject to strong ramming. Bulk materials for construction.
Ramming material for blast furnace
The refractory ramming material is prepared from a high proportion of granular and powdery materials and a very low proportion of binders and other components, and even all of them are composed of granules and powders. Bulk materials for construction.
Because the material is mainly used for the direct contact with the molten material, it is required that the granular and powdery materials must have high volume stability, compactness and corrosion resistance, and the induction furnace should also have insulation.
Compared with other unshaped refractories of the same material, the ramming material is dry or semi-dry and loose, and a dense structure is obtained by strong ramming. Only when heated to a sintering degree, the combined body material has strength.
After the ramming material is formed, different heating methods can be adopted to promote its hardening or sintering according to the hardening characteristics of the mixture. If it contains inorganic chemical binder, it will harden on its own.
It can be demolded and baked after having a considerable strength; if it contains a thermoplastic carbon mixture, it will be demolded after cooling to have a considerable strength, and it should be heated quickly before use to make it coking; and it does not contain a binder that hardens at room temperature, often after tamping. Sintered with die row.
item |
GT-1 |
GT-2 |
GT-3 |
|
Al2O3 |
60 |
58 |
58 |
|
Sic+C |
20 |
13 |
12 |
|
Bulk density(g/cm3)≥ |
110℃×25h |
2.35 |
2.30 |
2.40 |
Line rate of change% |
1450℃×3h |
±0.5 |
±1.0 |
±0.8 |
Compressive strength |
110℃×24h |
5 |
10 |
10 |
1450℃×3h |
35 |
20 |
1.5 |
|
use |
Small blast furnace main trench working layer |
Small blast furnace branch trench working layer |
No-bake ramming material |
The use and characteristics of ramming material:
For small blast furnace tapping system with only single tap hole or local emergency repair of large and medium blast furnace tapping system, the ramming materials listed in the above table can be used.
Among them: GT-3 is a non-baking ramming material, which adopts a new type of combination system, which does not generate water vapor during the use process, so that the iron can be directly tapped after ramming construction without any test. Thereby improving the operation of the equipment; the purpose of efficiency.
It can be widely used in the main ditch of the tap ditch of medium and small blast furnaces and all parts of the tap ditch that need to be fast.
Brown Fused Alumia powders are fused wIth premium raw materials and 3500 KVA furnace. It is perfect material specifically manufactured to be used for general abrasive applications in bonded abrasive tools, polishing and sandblasting grit. It has lower hardness and abrasive capacity than diamond, boron carbide, and silicon carbide, it is widely used for grinding ferrous materials, finishing tough and hard materials. It is also be used as high-class refractory materials. Brown Fused Alumia is offered in macro and micro powder form, in both F and P grades.
Brown corundum refractory brick is made of fused corundum as the main raw material. It is formed by high pressure and fired at high temperature. It has high thermal shock stability, low porosity, low expansion, good resistance to melt vapor and gas erosion, and excellent oxidation resistance. Dimensionally accurate advantages.
Silica brick is an acidic refractory mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases
High alumina refractory mortars used in kilns in metallurgy, building materials, machinery, chemical industry, electric power and other industries, used for masonry clay bricks, high alumina bricks, corundum bricks, with full ash joints, good air tightness of masonry, high bonding strength, high temperature performance Excellent, suitable for construction time and so on.
Refractory wet mud used to block the iron outlet can be divided into two categories: water cannon mud and waterless gun mud. On large and medium -sized blast furnaces on high top pressure and high degree of smelting.
Anchor bricks are anchor bricks for industrial kilns. The electric furnace roof is a furnace roof structure supported by metal hanging bricks and refractory bricks. Therefore, the leakage of reactive gas and hot gas in the furnace will damage the metal hanging parts, thereby causing furnace damage. roof collapse accident. Anchor bricks are also called hanging bricks and anchors.
Refractory castable is a kind of refractory material that does not need to be formed and has good fluidity after being fired and stirred with water.
Silica brick: an acidic refractory mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases. Its silica content is more than 94%, it has anti-acid slag erosion performance, high high temperature strength, high load softening temperature, long-term use in high temperature flower wells without deformation, but low thermal shock stability (heat exchange in water is 1-4 Second-rate).