---
title: "Blast Furnace Tuyere Assembly"
industry: "Iron and Steel Basic Production"
verification_protocol:
  urn: "URN:CNFX:ME:BLAST_FURNACE_TUYERE_ASSEMBLY"
  data_integrity_hash: "783beabc538245608db58cf86d2c0351"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:BLAST_FURNACE_TUYERE_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/iron-steel-basic-production/product/blast-furnace-tuyere-assembly.md"
  official_resource_url: "https://cnfx.com/industry/iron-steel-basic-production/product/blast-furnace-tuyere-assembly"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "2.5-4.0 bar (250-400 kPa) hot blast pressure, 1200-1350°C blast temperature, 0.8-1.2 m/s tuyere velocity"
    unit: "mm"
  secondary_spec:
    status: "config-dependent"
    typical_range: "2.5-4.0 bar (250-400 kPa) hot blast pressure, 1200-1350°C blast temperature, 0.8-1.2 m/s tuyere velocity"
    unit: "bar"
engineering_limits:
  max_safe_operating_point:
    value: 350
    unit: "MPa"
    consequence: "Thermal fatigue from cyclic heating (1200°C blast) and cooling (water cooling at 40°C) creates stress concentrations exceeding material endurance limit (280 MPa at 10^6 cycles)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cooling water flow reduction below 15 m³/h per tuyere"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dual redundant cooling circuits with flow sensors and automatic blast shutoff at 12 m³/h"
  - node_2:
      trigger: "Hot blast temperature exceeding 1400°C for &gt;30 minutes"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Temperature-controlled blast mixing with ceramic-lined hot blast main maintaining 1350°C maximum"
bom_nodes:
  tuyere-nozzle:
    type: "component"
    urn: "URN:CNFX:ME:TUYERE_NOZZLE"
    interface_type: "physical-logic-coupled"
  cooling-water-jacket:
    type: "component"
    urn: "URN:CNFX:ME:COOLING_WATER_JACKET"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
  thermal-protection-lining:
    type: "component"
    urn: "URN:CNFX:ME:THERMAL_PROTECTION_LINING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 10855:2017 (FOUNDRY PRODUCTS - BLAST FURNACE TUYERES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/iron-steel-basic-production/product/blast-furnace-tuyere-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "22e7d2be39c110999a33f3303e7624e1e6cf3578202813e6aba99031649d50c7"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Blast Furnace Tuyere Assembly

## 1. Technical Definition
Critical blast furnace component for injecting hot air into the furnace hearth

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **2.5-4.0 bar (250-400 kPa) hot blast pressure, 1200-1350°C blast temperature, 0.8-1.2 m/s tuyere velocity**. Failure boundary: **Thermal stress exceeds 350 MPa yield strength of copper alloy at 450°C, or pressure exceeds 6.0 bar causing mechanical deformation**, Mechanism: **Thermal fatigue from cyclic heating (1200°C blast) and cooling (water cooling at 40°C) creates stress concentrations exceeding material endurance limit (280 MPa at 10^6 cycles)**.

### 2.1 Analytical Physics Model
Governed by the **Heat Sterilization F0 Lethality Model**:

> **Primary Equation**: $F_0 = \int_{0}^{t} 10^{(T-121.1)/z} dt$  
> **Engineering Impact**: Validates microbial reduction integrity for aseptic packaging.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| T | Process Temp (°C) | **$T \in [1200-1350°C]$ °C** (Per `temperature_range`) |
| t | Exposure Time (min) | Engineering Constant |
| z | Z-value | **10 °C** (Standard for *C. botulinum*) |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Cooling water flow reduction below 15 m³/h per tuyere | 8 | Copper tuyere tip melting at 1085°C melting point | Dual redundant cooling circuits with flow sensors and automatic blast shutoff at 12 m³/h |
| Hot blast temperature exceeding 1400°C for &gt;30 minutes | 8 | Thermal expansion mismatch between copper tuyere (16.5 μm/m·K) and steel housing (11.0 μm/m·K) | Temperature-controlled blast mixing with ceramic-lined hot blast main maintaining 1350°C maximum |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | mm | Verified |
| secondary_spec | Config-dependent | bar | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hot Blast Stove**, **Blast Furnace Gas Cleaning System**, **Tuyere Cooling Water System**  
**Downstream Applications**: Pig Iron, Molten Steel, Steel Slabs  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in blast furnace tuyere assemblies and why?
**A**: Our tuyere assemblies use copper alloy for superior heat conductivity, stainless steel for structural integrity, and refractory lining for thermal protection. This combination ensures optimal heat transfer, durability, and resistance to extreme furnace conditions.

### Q: How does the cooling system work in a tuyere assembly?
**A**: The cooling water jacket circulates water through the assembly to dissipate heat from the hot blast injection process. This maintains safe operating temperatures, prevents thermal damage, and extends the component's service life in continuous blast furnace operations.

### Q: What specifications should I consider when selecting a tuyere assembly?
**A**: Key specifications include connection flange size (DN), cooling water flow rate (m³/h), hot blast pressure rating (bar), maximum operating temperature (°C), nozzle diameter (mm), and overall length (mm). These ensure compatibility with your blast furnace system and operational requirements.

## 6. Manufacturing Compliance
- ISO 10855:2017 (FOUNDRY PRODUCTS - BLAST FURNACE TUYERES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Blast Furnace Tuyere Assembly](https://cnfx.com/industry/iron-steel-basic-production/product/blast-furnace-tuyere-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: BLAST_FURNACE_TUYERE_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: ed3f50c8
