Full-range refractory solutions for blast furnaces, hot blast stoves, iron runners, converters, EAFs and ladles.
Iron & steel is the largest downstream consumer of refractories. Henan Songrui New Refractory Materials Co., Ltd. supplies integrated packages — from high-alumina and corundum-SiC castables to precast trough channels and MgO-C bricks — for blast furnaces, hot blast stoves, casthouse runners, converters, EAFs and ladles. For main-trough washing, slag-line attack and ladle thermal cycling, the company recommends grade, thickness and lining design per service condition, with batch test reports.
Typical kilns in this industry — click each to see its specific problems and solutions
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 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.
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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Al2O3-SiC-C iron runner castable is made of high-grade bauxite clinker with SiC and carbon additives, offering excellent slag resistance, erosion resistance and thermal shock stability for blast furnace main troughs to achieve long service life.
Chemical composition Al₂O₃≥55%
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Phosphate bonded high alumina castable, made of high-grade bauxite clinker with phosphate binder, offers high medium-temperature strength, excellent thermal shock resistance and abrasion resistance for hot blast stove, reheating furnace and soaking pit linings.
Al₂O₃ content≥65%
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Anhydrous taphole mud is made of corundum, silicon carbide and coke fines with resin binder for blast furnace taphole sealing. It sinters fast, plugs densely and resists molten iron and slag scouring, ideal for large and medium blast furnaces under high pressure.
Al₂O₃ content30%～45%
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Alumina-magnesia ladle castable (Al2O3-MgO) with in-situ spinel formation offers excellent slag resistance, thermal shock resistance and longer service life, ideal for integral lining and repair of steel ladles.
Al2O3 content75%～85%
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Tundish working lining castable (magnesia dry mix) features high MgO content, dry vibrating installation, fast baking and easy stripping, offering excellent erosion resistance for continuous casting tundishes.
MgO content≥ 90%
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Converter self-flow repairing material made from fused magnesia with organic binders features excellent hot-state self-flowing, fast sintering, high bonding strength and low fume, ideal for hot repair of converter large face, trunnion and taphole surroundings.
MgO content≥ 76%
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KR desulfurization stirrer castable is a mullite-corundum based monolithic for the outer lining of KR hot metal desulfurization impellers. Low-cement bonded and integrally cast, it resists hot metal and slag attack and thermal shock, delivering stable service life.
Al₂O₃ content≥ 75%
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RH dip pipe castable is a low-cement bonded corundum-magnesia alumina spinel monolithic for RH vacuum refining immersion pipes. It resists thermal shock and spalling, solving cracking and detachment from thermal expansion mismatch among shell, bricks and castable.
Al₂O₃ content≥ 88%
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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.
Al₂O₃ content60% – 85% (depending on duty)
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Blast furnace hearth carbon ramming mass is a leveling layer between carbon blocks and cooling staves and under the hearth bottom. Made of calcined anthracite, graphite and SiC with resin or tar binder, it offers high thermal conductivity and sealing to level, conduct heat and seal gaps.
Fixed carbon≥ 85%
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Tundish coating material made from quality magnesia and magnesia-calcia sand with phosphate composite binders features easy trowelling, strong adhesion, no cracking or spalling, good erosion resistance and easy stripping, ideal for quick repair of continuous casting tundish working linings.
MgO content≥ 90%
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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.
Max. Service Temp.1600℃
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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.
Max. Service Temp.1650℃
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Ultra-low-cement castable with CaO≤1% and Al₂O₃≥70% serves to 1700℃. High-purity aggregates with close packing minimize low-melting phases, delivering near-corundum performance.
Max. Service Temp.1700℃
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Brown corundum castable based on dense fused alumina with Al₂O₃≥85%, 1750℃ max service and CCS≥90MPa. High hardness, refractoriness and excellent slag resistance. Used in steel ladle working linings and slag lines, main iron runners, converter mouth areas and CFB boiler cyclone wear zones.
Max. Service Temp.1750℃
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Andalusite castable exploits the micro-expansion of mullitization to offset shrinkage, giving long-term volume stability. Al₂O₃≥72%, 1650℃ max service, excellent thermal-shock and creep resistance.
Max. Service Temp.1650℃
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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.
Max. Service Temp.1400℃
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Iron runner castable purpose-built for blast furnace troughs with Al₂O₃≥65%, SiC+C≥15% and 1550℃ max service. Resists continuous erosion by hot iron and slag. For main trough working linings, branch runners, swing spouts, slag runners and trough covers—the core refractory of the cast house.
Max. Service Temp.1550℃
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Swing spout castable is dedicated to the curved linings of blast furnace swing spouts, Al₂O₃≥60%, 1500℃ max service. Sharing the Al₂O₃-SiC-C system with runner castables, it withstands continuous high-velocity iron flow and abrasion for swing spout linings, launders to ladles and small runners.
Max. Service Temp.1500℃
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BF taphole ramming mix is applied by semi-dry ramming without formwork, Al₂O₃≥70%, 1600℃ max service. Layered ramming gives density and enables rapid hot repair.
Max. Service Temp.1600℃
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Plastic refractory is rammed into place without formwork or excess water, Al₂O₃≥65%, 1600℃ max service. Ideal for complex shapes and repair without furnace shutdown.
Max. Service Temp.1600℃
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Castable precast blocks are factory-cast, cured and fired to drawings with ±2mm dimensional accuracy, 1700℃ max service. Uniform quality with crane-installed placement that eliminates formwork, casting and curing—dramatically shortening outage time.
Max. Service Temp.1700℃
Learn More →Application cases & castable solution practice
Frequent iron runner relining caused long downtime. Precast trough segments and quick-change blocks cut the overhaul from 5 days to 2 days and are expected to extend runner life by over 30%.
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