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Design Introduction of 60tph Walking Beam Reheating Furnace
Basic Design Conditions of Heating Furnace
Furnace Type: Walking Beam
Types of Billets: Carbon Structural Steel Q195~Q255
High-quality Carbon Structural Steel: 10#~45#
Billet Specifications: 1001006000mm, 1501506000mm (Standard Billets)
Billet Straightness: Maximum ≤10mm/m, Overall ≤70mm
Rated Capacity: 60tph (Heating 1501506000mm, Carbon Structural Steel, 20ºC~1150ºC)
Fuel: Natural Gas, 8600*4.18kJ/m³
Billet Entry Temperature: Ambient Temperature
Billet Exit Temperature: 950~1150ºC
Section Temperature Difference: ≤30ºC
Rated Specific Energy Consumption: 3004.18kJ/kg billet (Heating 150150)
Water seal and slag off system
Between the column of walking beam and the bottom is installed a apron water seal which is immerged in the long water seal trough in the direction of the furnace length to prevent the cold air from entering.
In the process of walking beam moving up and forward,via water seal blade and scrap plate,few seal falling into slag off trough at the end of furnace.
Material of slag scraper:stainless steel.
Water supply&drainage system and water usage in safety
Close circuit water system
Water-cooled parts such as the water beam, discharge furnace door frame, cantilever rollers inside the furnace at the loading and unloading ends, and buffers are cooled using a clean circulating water system.
Safety alarm items
a.Alarm if the furnace temperature of each section exceeds.
b.Alarm if pressue of cold air main pipes is lower.
c.Alarm if pressure of nature gas main pipes is lower.
d.Alarm if pressure of close circulation water main pipes is lower.
e.Alarm if pressure of open circulation water main pipes is lower.
f.Alarm if preheating temperature of air main pipes exceeds.
g.Alarm if the temperature of drainage of each circulation exceeds.
Introduction to the Features of a 60tph Walking Beam Furnace
Function Overview
The fundamental task of Level 2 (L2) process control in a heating furnace is to achieve optimal heating of steel billets within the furnace according to production process requirements. This is done through optimized settings and calculations based on mathematical models. L2 control manages parameters such as furnace temperatures of heating sections or fuel flow rates, directly controlling various heating quality indicators of the steel billets.
The actual production conditions in heating furnaces are constantly changing. When relying solely on Level 1 (L1) control, furnace temperature settings are determined by operators, influenced by their experience levels. This can lead to fluctuations in the quality of steel billet heating. Particularly when steel billet specifications vary significantly or new steel grades are rolled, relying on manual experience alone makes it difficult to ensure consistent heating quality.
As a critical component of continuous rolling production lines, heating furnace production must first meet the quantity and quality requirements of the rolling mill. Additionally, it aims to conserve energy and protect heating furnace equipment. With Level 2 control, various production indicators of the heating furnace can be monitored, such as billet exit temperatures, temperature differentials across billet sections, oxidation losses, temperature at water marks on billets, and fuel consumption.
The primary control objective of heating furnace production is the quality of steel billet heating. Directly measuring the temperature distribution of steel billets inside the furnace is challenging. Instead, it is estimated through establishing heat transfer models within the furnace and using measurable variables during the production process. This links furnace temperature settings directly to billet exit temperatures, aiming to minimize energy consumption and oxidation losses during steel billet heating production.
The core support of Level 2 computer supervisory control software for heating furnaces lies in its online control mathematical model. This includes mathematical abstraction and description of inherent laws within the heating furnace production process, mathematical algorithms, and computer application technologies. Research into online monitoring mathematical models of heating furnaces, along with the development of monitoring software and necessary computer hardware and software systems, ensures the completion of Level 2 control tasks. This is essential for modern high-speed continuous rolling production and high-precision control of product quality.
Key elements of Level 2 control in heating furnaces include billet position tracking, temperature calculation, dynamic furnace temperature setting, coordination with rolling line production pace, decision support during billet waiting periods, and regular production record completion and reporting.
Prior to entering the furnace, steel billets are measured using high-temperature probes installed at the furnace entrance to det
Necessary L1 Conditions
| Serial Number | Equipment Name | Specifications and Model | Unit | Quantity | Remarks |
| 1 | Thermocouples for Each Section | S-Type Thermocouple | Piece | Reused | Furnace Temperature Detection |
| 2 | Control Valves for Each Section | 4~20m AInput/Output: 4~20m | Unit | Reused | Flow Regulation |
| 3 | Flow Meters for Each Section | Unit | Reused | Flow Measurement | |
| 4 | In-furnace Cold/Hot Metal Detector | Laser | Set | 1 | Billet Verification |
| 5 | Out-furnace Hot Metal Detector | Laser | Set | 1 | Steel Exit Detection |
| 6 | High-temperature Probes at Entry | C0.5% 0-1000ºCAccuracy0.5% | Set | 1 | Entry Temperature |
| 7 | Ethernet Communication Interface | TCP/IP | Piece | 2 | Communication |
Automatic Ignition System
The automatic ignition system is not directly related to L2. Its purpose is to perform ignition operations via the HMI, replacing the traditional manual ignition of burners with open flames. Ignition control and fault reset control can be operated on the HMI or the ignition control box, and it provides flame detection signals and flameout signals.
| Serial Number | Equipment Name | Unit | Quantity | Remark; |
| 1 | Ignition Controller | Set | As Needed | Automatic Ignition |
| 2 | Ignition Gun | Set | As Needed | Automatic Ignition |
Project Details
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With decades of rapid development and accumulation, China has been perfect and mature on technology and management in various industrial areas, shaping a complete processing manufacturing industry with competitive price, well known for its excellent skill, high efficiency and hardworking team with qualification for personnel dispatching.
| Professional Professional technical and management team with abundant experience in the implementation of domestic and international projects; |
| Responsive Responsively and meticulously, translating your needs into complete solutions; |
| Integration Integrating various technologies and resources in China and fulfilling complementary advantages, by relying on professional teams; |
| Motivation Motivated to provide the optimal solution and quality products; |
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