Pioneering High-Performance Refractory Solutions for Global Metallurgy
Zhengzhou XZK Industrial Group Co., Ltd. (新中科集团) is a premier Chinese manufacturer specializing in advanced refractory materials and turnkey lining engineering for ironmaking, steelmaking, continuous casting, and industrial kilns.
Headquartered in Xinmi City—the world-renowned capital of refractory raw materials and manufacturing—XZK integrates mineral processing, automated high-pressure pressing, high-temperature firing, diamond pre-assembly machining, and complete EPC furnace relining engineering. Over the past two decades, XZK has grown into a trusted strategic partner for more than 400 heavy metallurgical plants across Europe, Southeast Asia, the Middle East, the Americas, and CIS countries.
Two Decades in the Xinmi Refractory Basin
Zhengzhou XZK Industrial Group Co., Ltd. is a source manufacturer of engineered refractory materials and complete furnace lining systems, headquartered in the Micun and Songlou refractory industrial zone of Xinmi City, Henan — the densest concentration of refractory raw material processing and manufacturing capacity in China. Operating from six specialised workshops with 100,000 metric tons of annual capacity, XZK supplies integrated steel plants, mini-mills, ferro-alloy producers and EPC contractors in more than 60 countries.
The group's scope runs from mineral processing and automated high-pressure pressing through ultra-high-temperature firing, diamond pre-assembly machining and turnkey furnace relining engineering. Over 60% of output is made to customer drawings, including large key shapes, taphole assemblies and pre-assembled purging blocks.
Research Led by Practitioners, Not Brochures
XZK's R&D centre is led by Chief Scientist Professor Shi Gan and focuses on the microstructural behaviour of refractories under the combined attack of molten slag, thermal cycling and mechanical load. The group holds 93 core patents and has contributed to the drafting of Chinese national and industry standards, including GB/T 4984-2023 (chemical analysis of zirconia-containing refractories), GB/T 44333-2024 (green product assessment for refractories), JC/T 2574-2020 (sillimanite bricks for glass furnaces) and T/CSTM 00853-2024 (chrome-zirconia-corundum bricks for glass furnace regenerators).
That work translates into products specified by mechanism: antioxidant packages matched to service temperature, grain distributions tuned to thermal shock exposure, and creep behaviour engineered rather than measured after the fact.
Manufacturing Built for Batch-to-Batch Repeatability
Refractory failure is rarely caused by a bad batch design — it is caused by variation between batches. XZK's answer is automation at every step that influences consistency:
- Fully automatic computer-controlled batching of high-purity mineral matrices.
- 630-ton to 2,000-ton class CNC hydraulic pressing for uniform green density.
- Ultra-high-temperature tunnel and shuttle kilns with computer-controlled firing curves.
- Diamond grinding and CNC machining of critical seating faces, with dry trial-fitting of pre-assemblies before shipment.
- Ultrasonic non-destructive testing and pre-assembly gap verification, with joint gaps held under 0.5 mm on critical assemblies.
Quality Management and Traceability
XZK operates under ISO 9001:2015 (quality), ISO 14001:2015 (environment), ISO 45001:2018 (occupational health and safety) and ISO 50001:2018 (energy management). Every production batch is chemically assayed and physically tested, and a Certificate of Analysis covering chemistry, bulk density, apparent porosity, cold crushing strength and hot modulus of rupture is issued with each shipment. Third-party verification by SGS, BV or TÜV can be arranged with witnessed sampling at our Xinmi laboratory.
Global Delivery
Shipments move FOB Qingdao or Tianjin, CIF to worldwide ports, or door-to-door. Standard grades dispatch in 7–14 days; custom pressed shapes requiring new tooling in 20–35 days. Packaging uses ISPM-15 fumigated heat-treated pallets with moisture-barrier lining and edge protection, date-stamped for shelf-life control.
To discuss a lining package, see our refractory portfolio, review project references, or send your furnace drawings for a 48-hour zonal proposal.
Our 6 Specialized Production Workshops
Full-cycle manufacturing control from mineral classification to precision diamond grinding and pre-assembly testing.
1. High-Tonnage Pressing Line
Equipped with 630T to 2,500T automatic CNC hydraulic presses. Ensures uniform compaction density and microscopic pore structure across large-format blocks and radial ladle bricks.
2. Ultra-High-Temp Tunnel Kilns
Multi-zone natural gas tunnel kilns operating up to 1800°C with automated PLC temperature curves, guaranteeing complete mineral phase transformation and zero micro-cracking.
3. Pre-Assembly & CNC Machining
Equipped with diamond multi-blade saws, automated face grinders, and full pre-assembly test rings to verify zero-gap joint tolerances (≤ 0.5 mm) prior to international export.
4. Monolithic Refractories Line
Fully automated weighing and batching system producing 30,000 MT/year of corundum-spinel castables, EAF delta roof mixes, gunning repair mass, and ladle filler sand.
5. Continuous Flow Control Line
Specialized isostatic pressing and high-temp carbon firing for slide gate plates, submerged entry nozzles (SEN), ladle shrouds, and stopper rods for multi-heat sequence casting.
6. Eco Waterless Taphole Clay
Dedicated resin-bonded environmental production facility supplying premium non-aqueous taphole clay for blast furnaces from 1,000m³ to 4,000m³.
Rigorous Testing Standards Certified by ASTM, ISO & YB/T
Quality is the bedrock of furnace safety. Every batch of raw minerals and finished refractory shapes undergoes rigorous inspection in our municipal engineering research laboratory before packing.
- X-Ray Fluorescence (XRF): Precision chemical assay (Al2O3, MgO, ZrO2, Fe2O3, SiO2).
- High-Temp RUL Furnaces: Testing refractoriness under 0.2 MPa load up to 1750°C.
- Mechanical Strength Testing: Cold Crushing Strength (CCS) & Hot Modulus of Rupture (HMOR).
- Thermal Shock Rig: Water-quench and air-cooling thermal fatigue testing cycles.
Prof. Shi Gan
Chief Scientist & Technical DirectorProfessor-level senior engineer, national-level refractory expert, and first inventor of industry-leading composite refractory grades that solved long-life furnace challenges.
Led by Prof. Shi Gan — 40-Strong Research Team
A 40-strong dedicated R&D team drives continuous innovation in green refractory materials and new processing technology — backed by a complete physical and chemical testing center. Our 90+ national patents and 5+ co-authored national & industry standards are the direct output of this team.
Three Production Bases, One Quality System
Specialized manufacturing sites cover the complete refractory grade spectrum for the iron & steel industry.
Insulating Materials Base
Alumina bubble brick, mullite insulating brick, high-alumina and clay insulating bricks for energy-saving linings.
High-Temperature Specials Base
Chrome-corundum, composite anti-erosion bricks and high-grade fired specialties for the harshest metallurgical duties.
Mid-to-High-Grade Base
Sillimanite, andalusite, corundum, AZS, mullite and monolithic refractories for blast furnace, BOF, EAF and ladle linings.
Certified Quality & Green Manufacturing
ISO 9001 · 14001 · 45001 · 50001 certified, plus national high-tech enterprise and green factory honors.
Schedule a Factory Audit or Technical Consultation
We welcome international steelmakers, EPC contractors, and procurement engineers to visit our manufacturing plants in Xinmi, China, or arrange a live video inspection tour.