I. Refractory Materials

(I) Bricks for Blast Furnaces

1. Carbon Bricks

Technical Parameters

Material: Graphite/Semi-graphite carbon bricks, fixed carbon content ≥85%

Bulk density: 1.5-1.8g/cm³, compressive strength ≥30MPa

Thermal conductivity: 15-25W/(m・K) (at 1000℃)

Resistance to molten iron erosion: Erosion depth ≤2mm/year in 1500℃ molten iron

Selection Points

Ultra-microporous carbon bricks (porosity ≤18%) are selected for the hearth/hearth, with strong resistance to molten iron penetration

Hot-pressed small carbon bricks (size ≤345×150×75mm) are selected for the furnace belly section to adapt to the thermal deformation of the furnace body

2. Alumina-mullite bricks

Technical Parameters

Chemical composition: Al₂O₃≥60%, mullite phase content ≥50%

Refractoriness: ≥1790℃, load softening start temperature ≥1650℃

Thermal shock resistance: ≥20 cycles of 1100℃ water cooling without cracking

Slag resistance: Erosion rate ≤5% in CaO-SiO₂-FeO slag

Selection Points

Low creep alumina-mullite bricks (creep rate ≤0.5%/50h@1400℃) are selected for the upper part of the blast furnace body

Mullite bricks (thermal conductivity ≤1.2W/(m・K)@1000℃) are selected for the hot blast stove crown

(II) Converter/Electric Furnace Lining

1. Mag-carbon bricks

Technical Parameters

Material: MgO≥85%, C content 8-15%, antioxidant (Al/Mg) 1-3%

Bulk density: 2.8-3.0g/cm³, compressive strength ≥50MPa (110℃ drying)

Slag erosion index: Erosion thickness ≤3mm/furnace (1650℃) in converter slag

Service life: ≥80 furnaces for ordinary mag-carbon bricks, ≥150 furnaces for nickel-plated mag-carbon bricks

Selection Points

High-carbon mag-carbon bricks (C=14%) + spinel layer are selected for the slag line of the converter, improving slag penetration resistance by 30%

Composite mag-carbon bricks (MgO-C working surface, Mg-Ca brick backing) are selected for the hot spot area of the electric furnace

2. Magnesia-lime bricks

Technical Parameters

Chemical composition: MgO≥80%, CaO≥8%, SiO₂≤2.5%

Bulk density: 2.7-2.9g/cm³, water resistance (weight change ≤1.5% after 24h water immersion)

Desulfurization capacity: Desulfurization rate ≥30% in 1600℃ molten iron

Applicable temperature: 1500-1700℃

Selection Points

Low-silicon magnesia-lime bricks (SiO₂≤1.5%) are selected for clean steel smelting converters to avoid silicon increase in molten steel

Moisture-proof packaging (vacuum bag + desiccant) is required, storage period ≤3 months

(III) Torpedo Car/Ladle

1. Alumina-magnesia-carbon bricks

Technical Parameters

Material: Al₂O₃≥60%, MgO 8-12%, C 10-15%

Refractoriness: ≥1770℃, thermal shock resistance (1100℃ water cooling) ≥15 times

Resistance to molten steel scouring: Scouring rate ≤0.5mm/min in 1600℃ molten steel

Thermal conductivity: 1.8-2.2W/(m・K)@1000℃

Selection Points

Large alumina-magnesia-carbon bricks (size ≥600×300×150mm) are selected for the lining of torpedo cars to reduce joints

Spinel composite alumina-magnesia-carbon bricks are selected for the slag line of the ladle, improving slag erosion resistance by 50%

2. Monolithic Refractory Materials

Castable Technical Parameters

Material: Alumina (Al₂O₃≥80%)/Mullite (Al₂O₃≥60%)

Compressive strength: ≥80MPa at 110℃×24h, ≥100MPa at 1500℃×3h

Bulk density: 2.6-2.8g/cm³, linear change rate (1500℃) ≤±0.5%

Construction method: Pumping/manual casting, curing period ≥3 days

Ramming Mass Technical Parameters

Material: Magnesia (MgO≥90%)/Carbon (C≥85%)

Compressive strength after sintering: ≥60MPa (1600℃×3h)

Resistance to molten iron penetration: Molten iron penetration depth ≤1mm at 1500℃

Construction particle size: ≥90% of 0-5mm, high-frequency vibration is required

II. Wear-resistant Parts

(I) Liners

1. Crusher Wear-resistant Liners

Technical Parameters

Material: High manganese steel (ZGMn13)/High chromium cast iron (Cr≥25%)/Ceramic composite

Hardness: High manganese steel HB≥200 (unprocessed), high chromium cast iron HRC≥58

Impact toughness: High manganese steel ≥15J/cm², ceramic composite ≥5J/cm²

Abrasion resistance life: High manganese steel liner ≥6 months, ceramic composite liner ≥12 months

Selection Points

Jaw crusher selects ZGMn13 liner (impact load), surface hardness HB≥400 after impact hardening

Cone crusher selects high chromium cast iron liner (Cr26 type), strong wear resistance to particle abrasion

2. Hopper lining

Technical Parameters

Material: Wear-resistant steel plate (NM360/NM400) / cast stone plate

Hardness: NM400 steel plate HB≥400, cast stone plate Shore hardness ≥70

Thickness: 8-30mm, wear-resistant layer thickness ≥5mm (welded plate)

Corrosion resistance: Corrosion rate in acidic slurry ≤0.1mm/year

Selection Points

Ore hopper selects NM400 steel plate (bending forming), wear amount ≥10mm can be repaired by welding

Corrosive slurry hopper selects cast stone plate (strong acid and alkali resistance) + rubber buffer layer

(II) Screen

1. Vibrating screen plate

Technical Parameters

Material: Stainless steel (304/316L) / polyurethane / alloy steel wire

Screen hole size: 0.1-50mm, opening rate ≥40% (metal screen plate)

Tensile strength: Alloy steel wire screen ≥1200MPa, polyurethane screen ≥40MPa

Temperature resistance: Metal screen ≤300℃, polyurethane screen ≤80℃

Selection Points

Cold ore screening selects polyurethane screen (light weight, low noise), life ≥6000 hours

Hot sintered ore screening selects 310S stainless steel screen (temperature resistance 800℃), wire diameter ≥3mm

2. Wear-resistant net

Technical Parameters

Weaving method: Square hole / long hole, wire diameter 0.5-10mm

Wear-resistant layer: Surface welded hard alloy (WC content ≥60%)

Tensile strength: ≥800MPa, elongation ≥10%

Applicable materials: ≤50mm particle size ore / coke

Selection Points

Blast furnace bottom screening selects alloy steel wire wear-resistant net (wire diameter 6-8mm), impact and wear resistance

Cement plant raw material screening selects rubber composite wear-resistant net (good shock absorption effect)

(III) Chain / sprocket

1. Elevator chain

Technical Parameters

Model: NE50-NE300 plate chain, pitch 150-300mm

Material: 20Mn2/40Cr, surface hardness HRC≥40 (roller)

Breaking tensile force: NE100 chain ≥250kN, safety factor ≥5

Wear-resistant coating: Boronizing on the surface of the chain (penetration layer thickness 0.1-0.3mm)

Selection Points

High temperature environment (≥200℃) selects heat-resistant steel chain (4Cr9Si2), good oxidation resistance

Large inclination angle elevator selects side bending chain (allowing horizontal bending)

2. Scraper chain sprocket

Technical Parameters

Material: ZG42CrMo/Ductile iron (QT600-3)

Tooth surface hardness: HRC≥45 (quenching + tempering), hardened layer depth ≥3mm

Pitch circle diameter: 200-800mm, number of teeth 10-20 teeth

Service life: In ore scraper ≥8000 hours

Selection Points

Heavy-duty scraper selects forged sprocket (ZG42CrMo), impact resistance is better than cast sprocket

Needs to be equipped with a tensioning device (adjustment amount ≥50mm)

(IV) Hammer / Jaw plate

1. Crusher hammer

Technical Parameters

Material: High chromium cast iron (Cr28) / high manganese steel - high chromium composite

Hardness: Surface HRC≥60, core HRC≥40 (composite hammer)

Weight: 5-200kg, impact end welded hard alloy (WC particles)

Abrasion resistance life: In limestone crushing ≥5000 hours

Selection Points

Reversible crusher selects symmetrical hammer (can be flipped), utilization rate increased by 50%

Construction waste crushing selects impact-resistant high chromium hammer (impact energy ≥15J)

2. Jaw crusher jaw plate

Technical Parameters

Material: ZGMn13-4/Ultra-high manganese steel (Mn18Cr2)

Hardness: HB≥200 before impact, HB≥500 after impact

Tooth shape: Herringbone / triangle, tooth height 30-80mm

Matching gap: Fit degree with moving jaw ≥85% (detected with feeler gauge)

Selection Points

Coarse crushing jaw crusher selects thick tooth jaw plate (tooth height ≥60mm), suitable for large ore

Fine jaw crusher selects thin-toothed jaw plates (tooth height 30-40mm) to improve crushing efficiency

III. Spare Parts and Service Support

Adaptability Support

Provides customized selection based on equipment model (e.g., 2500m³ blast furnace), usage location, and operating parameters (temperature/medium)

Refractory materials provide 3D design drawings of furnace linings, and wear-resistant parts provide on-site surveying services

Quality Control

Refractory materials are accompanied by refractory/slag resistance test reports, and wear-resistant parts are accompanied by hardness/impact toughness test reports

Key wear-resistant parts (such as crusher hammers) provide installation and commissioning videos

Inventory and Delivery

Regular refractory materials inventory ≥500 tons, wear-resistant parts standard parts inventory ≥2000 pieces

Emergency orders support shipment within 48 hours (domestic), non-standard parts customization cycle ≤30 days