The hot metal ladle transports and holds molten iron; its bottom suffers impact and its slag line suffers slag attack, making it one of the most frequently relined refractory zones.
Problem-by-problem analysis with solutions and recommended refractories
Background The bottom of a hot metal ladle (torpedo or open ladle) is the most concentra…
Problem Details →Customer Question During ladle relining, the most common question is: "What castable for…
Problem Details →Background The slag line is the zone of a hot metal (or steel) ladle in direct contact w…
Problem Details →
Iron ladle castable is a low-cement monolithic for iron ladle linings. Bauxite or corundum aggregates with Al2O3 of 60-85% are selected by slag-line conditions. Low-cement bonding and integral casting resist slag attack, thermal shock and metal penetration.
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Steel-fiber reinforced castable with 2-3 vol% heat-resistant stainless fibers provides random reinforcement and toughening. Al₂O₃≥65%, 1400℃ max service, greatly improved flexural and thermal-shock spalling resistance.
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LA-60 high-alumina castable uses bauxite clinker aggregate with Al₂O₃≥60% and a max service temperature of 1600℃. Its low-cement bond gives high density and good thermal-shock resistance.
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Low-cement high-alumina castable with CaO≤2.5% and Al₂O₃≥65% reaches 1650℃ service. Dense micro-powder grading lowers porosity and raises hot strength.
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Chrome-corundum castable incorporates Cr₂O₃ (3-8%) to form viscous slag films at high temperature that block penetration. 1750℃ max service, outstanding resistance to non-ferrous slags.
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Corundum-mullite castable combines the hot strength of corundum with the thermal-shock resistance of mullite. Al₂O₃≥80%, 1700℃ max service.
Learn More →The blast furnace is the core ironmaking unit; linings face 1100–1500°C heat, slag/metal attack and alkali damage, with long campaigns relying on hearth ceramic cups and bosh cooling staves.
View Problems & Solutions →The hot blast stove preheats blast air to 1150–1300°C via checker bricks; checker service life and hot-blast main lining integrity determine achievable wind temperatures.
View Problems & Solutions →The iron runner guides blast-furnace hot metal to ladles; its slag line endures alternating metal/slag scouring, with Al2O3-SiC-C castable throughput being the key metric.
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