Silicon Carbide Heat Exchange Block for Corrosive Block-Type Heat Exchangers
ADCERAX Silicon Carbide Heat Exchange Blocks are custom SiC ceramic blocks used in block-type heat exchangers for corrosive chemical cooling, condensation, evaporation, absorption and heat-recovery systems.
The dense silicon carbide structure helps maintain stable heat transfer, corrosion resistance and channel geometry in harsh process environments. ADCERAX supports drawing-based customization for block size, channel layout, sealing surfaces and equipment interface requirements.
Catalogue No.
AT-THG-HRK2001
Material
High-purity silicon carbide (SiC)
Thermal Conductivity
120–180 W/m·K (high heat-flux efficiency)
Thermal Expansion Coefficient
≤4.5×10⁻⁶/K
Typical Use
Cooling, condensation, evaporation, absorption and heat recovery
A silicon carbide heat exchange block is a dense SiC ceramic block used as the heat-transfer core in block-type heat exchangers. The block is typically designed with process and service channels so heat can transfer through the silicon carbide wall while keeping the two fluids separated.
Compared with graphite or metal heat-transfer components, silicon carbide is selected when the system requires stronger corrosion resistance, higher hardness, better thermal stability and cleaner operation in aggressive chemical or thermal process environments.
Why Silicon Carbide Is Used for Heat Exchange Blocks
Corrosion resistance for aggressive fluids: Silicon carbide is suitable for many acidic, alkaline and oxidizing media where metal alloys or graphite may face corrosion, erosion or contamination risk.
Stable heat-transfer behavior: The material’s high thermal conductivity helps support efficient heat movement across the block wall in cooling, condensation, evaporation and heat-recovery duties.
Dimensional stability under thermal load: Low thermal expansion helps reduce geometry change when the block is exposed to repeated heating and cooling cycles.
Wear resistance in high-velocity flow: The hard SiC surface helps reduce channel wear when the process stream contains particles or moves at higher velocity.
Cleaner operation than graphite in selected systems: Dense SiC ceramic can help reduce contamination risk in processes where carbon shedding, metal ion release or corrosion by-products are a concern.
Technical Specifications of Silicon Carbide Heat Exchange Block
The following values are typical reference data for silicon carbide ceramic and should be reviewed together with the final material grade, process media, operating temperature, pressure condition and exchanger design.
Parameter
Typical Reference Data
Engineering Relevance
Material Composition
High-purity SiC ceramic
This determines corrosion resistance, thermal stability and cleanliness in process media.
Thermal Conductivity
120–180 W/m·K
This affects heat-transfer efficiency and exchanger sizing.
Thermal Expansion Coefficient
4.0–4.5 ×10⁻⁶/K
Lower expansion helps reduce thermal stress during temperature cycling.
Density
3.10–3.15 g/cm³
Higher density supports structural stability and lower open porosity.
Open Porosity
<0.1%
Lower porosity helps reduce fluid penetration and contamination risk.
Flexural Strength
350–450 MPa
This affects resistance to mechanical stress during handling and installation.
Compressive Strength
>2000 MPa
This supports load-bearing stability inside block assemblies.
Hardness
22–25 GPa
This helps resist abrasion from high-velocity or particle-containing process streams.
Thermal Shock Resistance
ΔT ≥250°C
This helps evaluate whether the block can tolerate process temperature changes.
Chemical Compatibility
Strong acids, alkalis and oxidizing media, subject to application review
Compatibility should be confirmed against actual concentration, temperature and cleaning method.
Dimensions of Silicon Carbide Heat Exchange Block
ADCERAX supports custom silicon carbide heat exchange blocks based on drawings, samples or exchanger assembly requirements. Instead of using one fixed standard size, the block geometry is reviewed according to process duty, flow direction, channel arrangement, sealing method and installation space.
For faster engineering review, please provide the block diameter or outer profile, height, channel diameter, channel quantity, channel pitch, process media, service media, working temperature, pressure range and cleaning method.
SiC Heat Exchanger
Item No.
Diameter（mm)
Height (mm)
AT-THG-HRK2001
Customize
Packaging of the Silicon Carbide Heat Exchange Block
Silicon Carbide Heat Exchange Block units are protected with reinforced carton layers and vibration-resistant internal padding before being secured in export-grade wooden crates. Each crate is stabilized on pallets to prevent impact during loading and long-distance transport. Moisture-barrier lining is added to maintain material integrity throughout international shipping and warehouse handling.
Applications in Corrosive and Thermal Process Systems
The following notes help reduce handling, installation and start-up risks for silicon carbide heat exchange blocks. Final operating procedures should follow the exchanger design, gasket system, plant safety rules and actual process conditions.
Chemical Cooling and Reaction Temperature Control
Silicon carbide heat exchange blocks are used in chemical cooling systems where corrosive fluids, reaction heat and temperature stability must be controlled at the same time. In chlorination, sulfonation and acid-processing lines, the SiC block helps provide a corrosion-resistant heat-transfer surface while reducing the risk of channel erosion or material contamination.
Condensation and Evaporation of Corrosive Media
For condensation, evaporation and absorption processes, the block structure allows heat to transfer through the SiC wall while keeping process and service fluids separated. This is useful when conventional metal heat exchangers may face corrosion, oxidation or frequent maintenance in aggressive media.
Fine Chemical and Selected Clean Process Lines
In fine chemical and selected clean process systems, dense SiC ceramic can help reduce the risk of metal contamination and surface degradation. Application suitability should be reviewed based on media composition, cleaning protocol, operating temperature and equipment validation requirements.
High-Temperature Heat Recovery Systems
Silicon carbide heat exchange blocks may also be used in heat-recovery systems where thermal cycling, hot gas exposure or corrosive exhaust streams create challenges for metallic heat-transfer components. The material’s thermal stability and low expansion support more stable geometry under repeated heating and cooling conditions.
Replacement of Graphite or Metal Heat Exchanger Components
When graphite blocks face erosion, carbon shedding or mechanical fragility, and metal exchangers face corrosion or contamination risk, silicon carbide can be evaluated as an upgrade material. The final selection should be based on chemical compatibility, pressure conditions, cleaning method, thermal duty and assembly design.
Usage Notes for Silicon Carbide Heat Exchange Blocks
The Silicon Carbide Heat Exchange Block from ADCERAX® requires proper handling, installation and operational practices to maintain stable heat-transfer performance in corrosive, high-temperature and continuous-flow environments. This guide summarizes the essential precautions and usage recommendations that help ensure long-term reliability and predictable thermal behavior in industrial systems.
Installation
Before installation, check whether the block dimensions, channel direction and sealing faces match the exchanger assembly. The block should be supported evenly during handling to avoid edge impact or point loading. Sealing surfaces should remain clean before final assembly.
Start-Up
During start-up, increase temperature and flow gradually according to the equipment procedure. Sudden pressure shock, uneven tightening or rapid thermal changes should be avoided because ceramic components are sensitive to mechanical impact and concentrated stress.
Cleaning
Cleaning methods should be selected according to the process media, deposit type and system compatibility. After cleaning, channels should be inspected for blockage, residue or contamination before the exchanger returns to full operation.
Storage and Handling Precautions
1. Store blocks in dry, vibration-free environments Moisture fluctuations may compromise packaging integrity or introduce contaminants. A stable, low-humidity environment extends the service readiness of stored components. Wooden crates with moisture-barrier lining are preferred for long-term storage.
2. Avoid stacking without structural support Direct stacking may apply unintended compressive loads and risk micro-fractures at the edges. Use pallet structures or spacing frames to distribute weight. Handling personnel should follow non-impact lifting protocols at all times.
3. Protect channel entrances from dust intrusion Seal openings with protective caps or film to prevent airborne contaminants from settling inside. When blocks must be moved frequently, ensure that protective layers remain intact. Maintaining clean channels ensures stable flow distribution when the unit enters service.
Engineering-Focused FAQs on the ADCERAX® Silicon Carbide Heat Exchange Block
Q1: Why are silicon carbide heat exchange blocks used instead of graphite or metal blocks?
A: Silicon carbide is selected when the process requires stronger corrosion resistance, higher hardness, better thermal stability and lower contamination risk than graphite or metal materials. It is especially useful in corrosive chemical cooling, condensation, evaporation and heat-recovery systems.
Q2: What process media are suitable for a SiC heat exchange block?
A: Silicon carbide is compatible with many acids, alkalis and oxidizing media, but final suitability depends on concentration, temperature, pressure, cleaning method and system design. ADCERAX reviews the actual working conditions before confirming material selection.
Q3: Can the channel layout be customized?
A: Yes. Channel diameter, channel quantity, pitch, flow direction and channel arrangement can be reviewed according to thermal duty, pressure behavior and available installation space. A drawing or sample is recommended for accurate quotation.
Q4: What information is needed for an RFQ?
A: Please provide the block drawing, outer dimensions, channel layout, process media, service media, operating temperature, pressure range, flow rate, cleaning method and target application. These details help confirm whether the block geometry and SiC material are suitable.
Q5: How should a silicon carbide heat exchange block be installed?
A: The block should be handled carefully, supported evenly and installed with clean sealing surfaces. Sudden impact, uneven tightening and point loading should be avoided to reduce stress concentration during assembly.
Q6: Is a silicon carbide heat exchange block suitable for selected clean process systems?
A: Dense SiC ceramic may help reduce contamination risk in selected clean process systems. However, suitability must be reviewed according to the process media, cleaning protocol, validation requirements and equipment design before use.
Customization Services for SiC Heat Exchange Block
The ADCERAX® Silicon Carbide Heat Exchange Block can be engineered to match process-specific thermal, chemical and flow requirements in advanced industrial systems.
Channel Geometry Configuration
Adaptation of internal flow architecture is enabled for process-driven performance.
Channel Diameter Design adjusted to achieve required flow conditions
Channel Array Pattern arranged to support targeted thermal gradients
Channel Density Allocation defined to balance heat flux and pressure behavior
Structural and Dimensional Engineering
Modification of external body form is permitted for equipment integration and installation.
Outer Body Shaping aligned with block-type exchanger housings
Length and Height Adjustment tailored for specific thermal path lengths
Interface Surface Preparation refined to ensure stable sealing conditions
