Trolley-type heat treatment furnace technical analysis and application guide

In the heavy machinery, aerospace, and automotive manufacturing industries, the heat treatment process for large workpieces directly determines the product's ultimate performance and lifespan.

Trolley-type heat treatment furnaces, with their exceptional load-bearing capacity and precise temperature control, have become core equipment for modern industrial heat treatment.

I. Core Product Advantages: Heavy Duty, Precision, and Efficiency
1. Extra-Large Space and Extreme Load Capacity

Trolley-type furnaces are designed specifically for heavy-duty industrial applications. Furnace dimensions can reach 8m x 3.5m x 3.5m, and even extend to ultra-large sizes of 25m x 8m x 8m, easily handling heavy components such as large rolling mill rolls, marine crankshafts, and wind turbine main shafts.

2. Precision Temperature Control Technology

Wide Temperature Range: Covers 650°C aluminum alloy aging to 1350°C high-manganese steel solution treatment.

Intelligent Zoned Temperature Control: Utilizes an 8-10-zone independent heating system, combined with a PID algorithm and a bidirectional thyristor power controller, ensuring furnace temperature uniformity within ±10°C.

Millisecond-level response: The all-fiber lining heats up at a rate of 100°C/hour, bringing an empty furnace to operating temperature in just 1.5 hours.

3. Revolutionary Energy Savings

Compared to traditional brick furnaces, the all-alumina silicate fiber lining is the key to energy savings:

Thermal conductivity is reduced by 30%, increasing thermal efficiency to 35-40%.

Weight is only 1/10-1/205 of a brick furnace, resulting in a lightweight structure and reduced steel consumption.

Waste heat recovery technology preheats the combustion air to 300°C, further reducing energy consumption.

II. Cutting-Edge Technology Analysis: From Structural Design to Intelligent Control
1. Innovative Structural Design

Composite Furnace Lining System: Refractory fiber modules have a compressed bulk density ≥ 210 kg/m³. Anchors are made of heat-resistant steel (such as 1Cr13) with a temperature resistance of up to 1260°C.

Dynamic Sealing Technology: The furnace door is clamped by a four-link mechanism using its own weight and sealed with a labyrinth-style steel blade. 1. The trolley utilizes a double-blade sand seal and a labyrinth-style castable structure to prevent heat leakage.

Heat-Resistant and Load-Bearing Design: The trolley frame utilizes a fish-belly longitudinal and transverse beam structure, and the furnace floor is constructed of heat-resistant cast steel to ensure long-term, heavy-duty load resistance without deformation.

2. Intelligent Combustion and Control System

High-speed pulse burner: Exit velocity 70-160 m/s, achieving strong convection within the furnace and reducing heating time by 20%;

Three-level automation control: Siemens PLC + host computer + intelligent combustion controller, supporting process curve programming, real-time storage, and voice alarm;

Multiple safety features: automatic flameout protection, gas pressure interlock, and closed-loop furnace pressure control (monitored by a micro-differential pressure transmitter) ensure zero-accident production;

III. Comprehensive Application Scenarios
1. Heavy Equipment Manufacturing

For annealing and quenching large castings and forgings (such as nuclear power rotors and wind turbine gears), addressing the challenges of oversized workpieces that traditional furnaces cannot handle. China National Erzhong Group Co., Ltd., Dongfang Steam Turbine Co., Ltd., and other companies have already implemented this technology on a large scale.

2. Automotive and Aerospace

Aluminum alloy wheels/die-cast parts: Precision aging treatment at 650°C, with adjustable quenching transfer time from 5 to 12 seconds.

High manganese steel track shoes: 1350°C quenching furnace equipped with a hydraulic tilting mechanism for rapid water entry.

3. New Materials and Powder Metallurgy

Catalyst carriers, magnetic materials, and carbon fiber prepregs are dried and sintered at 1000°C, ensuring contamination-free fiber furnace linings.