---
title: "Slag Notch"
industry: "Basic Metal Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SLAG_NOTCH"
  data_integrity_hash: "135de57b33724cebd351c7523ddad812"
  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:SLAG_NOTCH"
  data_source_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/slag-notch.md"
  official_resource_url: "https://cnfx.com/industry/basic-metal-manufacturing/product/slag-notch"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-0.5 MPa operating pressure, 1400-1600°C slag temperature, 50-200 mm opening diameter"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 25
    unit: "MPa"
    consequence: "Thermal fatigue from 1400-1600°C cyclic temperature gradients exceeding refractory's 10⁶ cycle fatigue limit, chemical corrosion from CaO-SiO₂-Al₂O₃ slag system dissolving refractory's Al₂O₃ matrix at rates exceeding 2 mm/hour"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Refractory lining erosion rate exceeding 2 mm/hour due to high FeO content (&gt;15%) in slag"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install zirconia-based refractory lining with 85% ZrO₂ content and automated thickness monitoring using ultrasonic sensors"
  - node_2:
      trigger: "Thermal shock from rapid temperature changes exceeding 200°C/minute during tapping cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement controlled cooling system maintaining maximum temperature gradient of 50°C/minute and pre-heating to 800°C before operation"
bom_nodes:
  refractory-lining:
    type: "component"
    urn: "URN:CNFX:ME:REFRACTORY_LINING"
    interface_type: "physical-logic-coupled"
  steel-casingretaining-ring:
    type: "component"
    urn: "URN:CNFX:ME:STEEL_CASINGRETAINING_RING"
    interface_type: "physical-logic-coupled"
  tapping-pluggate:
    type: "part"
    urn: "URN:CNFX:ME:TAPPING_PLUGGATE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/slag-notch.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "124f1501a1f19d1a3584dad83b9a70c5849d64d0bd80df6f3ea953d7fd72f06e"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Slag Notch

## 1. Technical Definition
A controlled opening in a furnace hearth designed for the removal of molten slag.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-0.5 MPa operating pressure, 1400-1600°C slag temperature, 50-200 mm opening diameter**. Failure boundary: **Refractory lining erosion exceeding 75% thickness, thermal stress exceeding refractory material's 25 MPa tensile strength, slag viscosity dropping below 0.5 Pa·s at operating temperature**, Mechanism: **Thermal fatigue from 1400-1600°C cyclic temperature gradients exceeding refractory's 10⁶ cycle fatigue limit, chemical corrosion from CaO-SiO₂-Al₂O₃ slag system dissolving refractory's Al₂O₃ matrix at rates exceeding 2 mm/hour**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Refractory lining erosion rate exceeding 2 mm/hour due to high FeO content (&gt;15%) in slag | 8 | Molten slag breakthrough through refractory lining at temperatures exceeding 1600°C | Install zirconia-based refractory lining with 85% ZrO₂ content and automated thickness monitoring using ultrasonic sensors |
| Thermal shock from rapid temperature changes exceeding 200°C/minute during tapping cycles | 8 | Refractory cracking propagation exceeding 5 mm depth per cycle, leading to structural failure | Implement controlled cooling system maintaining maximum temperature gradient of 50°C/minute and pre-heating to 800°C before operation |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Tapping Plug/Gate](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/tapping-pluggate.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Ladle Crane**, **Slag Pot**, **Furnace Tapping System**  
**Downstream Applications**: Steel Billets, Iron Ingots, Refined Metal Alloys  

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

### Q: What is the primary function of a slag notch in basic metal manufacturing?
**A**: A slag notch is a controlled opening in a furnace hearth specifically designed for the safe and efficient removal of molten slag, a byproduct of metal smelting and refining processes.

### Q: What materials are commonly used to construct a durable slag notch?
**A**: Slag notches are typically constructed using high-temperature refractory bricks (like high-alumina or magnesia-carbon) for the lining, encased in a steel casing or retaining ring for structural support, and include a tapping plug or gate to control the flow.

### Q: Why is the refractory lining critical in a slag notch?
**A**: The refractory lining is critical because it must withstand extreme temperatures and corrosive properties of molten slag, preventing furnace damage and ensuring controlled, safe slag removal during metal production.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Slag Notch](https://cnfx.com/industry/basic-metal-manufacturing/product/slag-notch)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SLAG_NOTCH | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9edaf39f
