---
title: "Blast Furnace Structure"
industry: "Basic Metal Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BLAST_FURNACE_STRUCTURE"
  data_integrity_hash: "06a57b35e21f769bcfce79f54cf82383"
  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_STRUCTURE"
  data_source_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/blast-furnace-structure.md"
  official_resource_url: "https://cnfx.com/industry/basic-metal-manufacturing/product/blast-furnace-structure"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.2-0.35 MPa internal pressure, 1200-1600°C internal temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.45
    unit: "MPa"
    consequence: "Creep rupture due to Larson-Miller parameter exceeding 38 at 0.45 MPa/1650°C, where P = T(20 + log t) × 10^-3, with T in Kelvin and t in hours"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal cycling exceeding 200°C/hour cooling rate during shutdown"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Controlled cooling system with maximum 50°C/hour gradient and refractory anchor system using 25Cr-20Ni alloy anchors"
  - node_2:
      trigger: "Carbon monoxide partial pressure exceeding 0.15 MPa at 1400°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Aluminum diffusion coating (AlSi 12%) on shell interior with 200 μm minimum thickness"
bom_nodes:
  hearth:
    type: "part"
    urn: "URN:CNFX:ME:HEARTH"
    interface_type: "physical-logic-coupled"
  bosh:
    type: "component"
    urn: "URN:CNFX:ME:BOSH"
    interface_type: "physical-logic-coupled"
  stack:
    type: "part"
    urn: "URN:CNFX:ME:STACK"
    interface_type: "physical-logic-coupled"
  top-charging-system:
    type: "part"
    urn: "URN:CNFX:ME:TOP_CHARGING_SYSTEM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 4706:2014 - REFRACTORY PRODUCTS FOR BLAST FURNACES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/blast-furnace-structure.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "50b37f87cb73bb935d05413336d6561152256686b6831a3d661c90104524f2c1"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Blast Furnace Structure

## 1. Technical Definition
The main structural vessel of a blast furnace where iron ore is reduced to molten pig iron through high-temperature chemical reactions.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.2-0.35 MPa internal pressure, 1200-1600°C internal temperature**. Failure boundary: **0.45 MPa internal pressure or 1650°C internal temperature sustained for &gt;30 minutes**, Mechanism: **Creep rupture due to Larson-Miller parameter exceeding 38 at 0.45 MPa/1650°C, where P = T(20 + log t) × 10^-3, with T in Kelvin and t in hours**.

### 2.1 Analytical Physics Model
Governed by the **Frame Structural Deflection Analysis**:

> **Primary Equation**: $\delta = \frac{5 q L^4}{384 E I}$  
> **Engineering Impact**: Ensures structural stability for multi-stage machines.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| q | Uniform Load | Engineering Constant |
| E | Elastic Modulus | Engineering Constant |
| I | Moment of Inertia | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Thermal cycling exceeding 200°C/hour cooling rate during shutdown | 8 | Refractory lining spalling and structural shell thermal stress cracking | Controlled cooling system with maximum 50°C/hour gradient and refractory anchor system using 25Cr-20Ni alloy anchors |
| Carbon monoxide partial pressure exceeding 0.15 MPa at 1400°C | 8 | Metal dusting corrosion of steel shell at 3 mm/year penetration rate | Aluminum diffusion coating (AlSi 12%) on shell interior with 200 μm minimum thickness |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Hearth](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/hearth.md) `(Standalone System)`
- [Stack](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/stack.md) `(Standalone System)`
- [Top Charging System](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/top-charging-system.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hot Blast Stove**, **Gas Cleaning Plant**, **Raw Material Handling System**  
**Downstream Applications**: Steel Billets, Steel Slabs, Steel Coils  

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

### Q: What materials are used in blast furnace construction?
**A**: Blast furnace structures combine a carbon steel outer shell with refractory brick lining for thermal resistance, plus cooling staves to manage extreme operating temperatures during iron production.

### Q: What are the main components of a blast furnace structure?
**A**: Key components include the bosh (tapered section), hearth (molten iron collection), stack (reaction zone), and top charging system for introducing iron ore, coke, and limestone.

### Q: How does the blast furnace structure withstand high temperatures?
**A**: The refractory lining protects the steel shell from 1500-2000°C internal temperatures, while water-cooled staves embedded in the structure provide continuous thermal management during operation.

## 6. Manufacturing Compliance
- ISO 4706:2014 - REFRACTORY PRODUCTS FOR BLAST FURNACES

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Blast Furnace Structure](https://cnfx.com/industry/basic-metal-manufacturing/product/blast-furnace-structure)**

### 🌐 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_STRUCTURE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 3bde116c
