Industry Overview
Metallurgical smelting processes operate at some of the highest temperatures in industry — from blast furnace tap temperatures of 1,400-1,600°C to converter steelmaking at 1,650°C. Wear parts in this environment face the unique triple challenge of extreme heat, aggressive chemical environments (slag chemistry), and severe mechanical wear from molten metal and slag handling. No other industry demands so much from wear-resistant materials.
Zhili has decades of experience supplying the metallurgical industry with premium heat-resistant alloys, wear-resistant castings, and precision-machined components for blast furnaces, converters, electric arc furnaces, ladle furnaces, and slag processing systems. Our materials are proven in the most demanding steelmaking environments, from basic oxygen steelmaking to stainless steel production and non-ferrous metallurgy.
Related Products for Metallurgical Smelting
Rotary Kiln Spare Parts
Rotary kiln tyres, riding rings, support rollers, and kiln shell components for ferroalloy and nickel pig iron production. Precision cast and machined for perfect fit and thermal expansion clearance.
Rotary Kiln Chain Systems
Kiln chains, lifting chains, and connecting links for heat transfer and material agitation in rotary smelting kilns. Heat-resistant alloy construction with superior creep strength at 800-1,100°C.
Roller Press for Slag Grinding
HPGR rollers and studded rollers for steel slag and ferroalloy slag granulation and grinding. Designed for high-pressure comminution with excellent thermal shock resistance.
Crusher Parts for Slag Processing
Jaw crusher liners, hammer crushers, and cone crusher liners for hot slag and molten slag processing. High-chromium heat-resistant alloys designed for combined thermal shock and abrasive wear.
Heat-Resistant Chain Links
Heavy-duty chain links and roller chains for high-temperature material handling in steel plants — from sinter feeding to ladle transfer. Austenitic stainless and heat-resistant alloy options.
Preheater & Smelting Furnace Components
Sintering machine pallets, grate plates, and furnace hearth components for iron ore sintering and non-ferrous smelting furnaces. Heat and abrasion resistant alloy construction.
Core Material System for Metallurgical Smelting
For the most demanding metallurgical environments — blast furnace trough, runner, and launder systems — Zhili uses premium heat-resistant alloys such as ZG35Cr28Ni48 and ZG40Cr25Ni35. These austenitic alloys maintain structural integrity above 1,100°C while resisting the aggressive slag chemistry of basic oxygen steelmaking and electric arc furnace operations.
| Grade | ZG35Cr28Ni48 / ZG40Cr25Ni35 |
| Max Operating Temp | ≤ 1,200°C (intermittent) / ≤ 1,050°C (continuous) |
| Creep Rupture Strength | > 100 MPa at 900°C / 10,000h |
| Slag Resistance | Excellent (CaO-SiO₂-Al₂O₃ slag systems) |
For slag granulation systems, slag crushers, and hot slag handling equipment, a Cr-Mo-Ni alloy system provides both wear resistance and heat resistance. Zhili's proprietary HT-WR alloy maintains HRC 45-52 at 600°C while providing excellent slag corrosion resistance for steel slag, copper slag, and nickel slag applications.
| Grade | HT-WR (Zhili Proprietary) |
| Room Temp Hardness | HRC 48-55 |
| Hardness at 600°C | HRC 35-42 (70%+ retention) |
| Max Operating Temp | ≤ 700°C (continuous) |
For non-ferrous metallurgy (aluminum, copper, zinc smelting) and sinter plant components, austenitic stainless alloys provide excellent oxidation resistance and adequate strength at working temperatures up to 1,100°C. These materials are the standard for aluminum reverberatory furnace components and copper matte handling.
| Grades | 310S (1.4845), 253MA, Custom |
| Max Operating Temp | ≤ 1,100°C (310S) |
| Oxidation Resistance | Excellent up to 1,150°C |
| Application | Furnace internals, heat treatment fixtures, chain conveyors |
For slag granulation centrifuge components, ladle turret rings, and continuous caster rolls, Zhili applies nickel-based and cobalt-based hardfacing overlays using plasma transferred arc (PTA) welding. These overlays provide maximum wear resistance while maintaining bond strength at elevated temperatures.
| Overlay Alloys | NiCrBSi (Colmonoy), Stellite®-type Co-based |
| Surface Hardness | HRC 45-65 (depending on alloy) |
| Service Temperature | Up to 750°C (retains hardness) |
| Application | Continuous caster rolls, slag crusher components, tuyere stocks |
Typical Application Scenarios
Blast Furnace Iron Runner & Trough
Molten iron and slag channels at 1,400-1,500°C. Sand casting iron runner blocks are replaced by Zhili's Ni-Cr alloy blocks with superior thermal shock resistance and slag corrosion resistance, doubling or tripling campaign life.
Ni-Cr Heat-Resistant Alloy · ≤1500°CSteel Slag Processing & Granulation
Converter and EAF steel slag at 1,600-1,650°C goes through granulation and grinding. Hot slag crushers, granulation drums, and HPGR rollers all require materials that resist both thermal shock and slag abrasive wear.
HT-WR Alloy · HPGR Stud RollersRotary Smelting Kilns (Ferroalloy, NPI)
Rotary kilns for nickel pig iron (NPI) and ferroalloy production at 1,400-1,500°C. Kiln tires, support rollers, and chain systems all require heat-resistant alloys with excellent creep resistance.
Kiln Tyres · Heat-Resistant SteelContinuous Caster Rolls
Water-cooled continuous caster rolls operating at 800-1,000°C surface temperature. PTA-overlay or induction-hardened rolls provide wear resistance for the steel strand contact zone.
PTA Overlay · Continuous CasterNon-Ferrous Smelting (Cu, Zn, Al)
Copper matte, zinc fuming, and aluminum holding furnaces. Austenitic stainless and Ni-Cr alloys for furnace hearths, launders, and casting wheels operating in aggressive metal vapor and fluoride environments.
Austenitic Stainless · 310S/253MAIron Ore Sintering Plant
Sintering machine pallets, windbox seals, and grate bars processing iron ore fines at 1,300-1,480°C. High-temperature oxidation and thermal fatigue are the primary failure modes.
Sintering Pallets · Heat-Resistant SteelSuccessful Cases
Blast Furnace Iron Runner Blocks — 3,200m³ BF
Rotary Kiln Tyres — Nickel Pig Iron Plant
EAF Slag Crusher Hammers — Stainless Steel Plant
Anode Casting Wheel Components — Copper Smelter
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