Quality Clay Brick Making Machine & Brick Tunnel Kiln Manufacturer

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The tunnel drying chamber consists of 15 sections and uses one W9-57-101N16B centrifugal fan for centralized heat supply and another fan of the same model for centralized moisture exhaust. This air supply and exhaust arrangement has the following drawbacks: Inconsistent moisture exhaust conditions, resulting in uneven drying of the green bricks. Drying proceeds faster near the exhaust fan and slower farther away. Rapid corrosion of the exhaust fan impeller and casing; one impeller requires replacement in less than one year. Replacement of a new impeller requires at least two days of intensive work, forcing shutdown of the brick machines and drying chambers, while the Hoffman kiln remains in a dormant, fire-stopped production state. To address this issue, the factory drew on experience with axial-flow fans for sectional moisture exhaust. The motor was positioned outside the fan to prevent damage. Accordingly, a 45° cast-iron casing and cast-aluminum blades were designed, with the motor mounted externally on the moisture exhaust fan. After adopting this fan, drying conditions in each tunnel section became uniform, significantly improving drying uniformity and efficiency, reducing power consumption and scrap losses, and eliminating production stoppages for fan maintenance. As shown in Table 6-2, sectional moisture exhaust using this fan offers clear advantages over centralized moisture exhaust.Table 6-2 Comparison Item Unit Centralized Exhaust Sectional Exhaust Comparison between the Two Total Air Volume m³/h 85,000~92,000 106,300~112,200 Increase 18~25% Total Motor Power kW 55 45 Reduction 18% Brick Entry Time min 22 22 Equal Output pcs/double shift 178,200 178,200 Equal Drying Degree % Average 60 Average 85 Increase 25% Scrap Loss % Average 10 Average 3 Reduction 7% In summary, the results of sectional moisture exhaust are highly significant. However, the first-generation moisture exhaust fan still had the following shortcomings: The fan body was relatively bulky; Because the blades were located at the bottom, disassembly and replacement during maintenance were extremely inconvenient; operators had to squat inside the tunnel, where flue gas caused severe choking; Due to the motor being directly sleeved, after prolonged operation the lubricating oil in the bearings leaked out. When oil starvation occurred, the motor was prone to damage. In response to the above issues, a horizontal 90° moisture exhaust fan was subsequently designed (Figure 6-10). After commissioning and trial operation, the results were excellent. Figure 6-10 Schematic Diagram of Moisture Exhaust Fan 1—Electric Motor; 2—Belt Drive; 3—Impeller; 4—Air Outlet; 5—Flange; 6—Air Duct

.gtr-container-x7y3z1 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 20px; max-width: 100%; box-sizing: border-box; } .gtr-container-x7y3z1 p { margin-bottom: 15px; text-align: left !important; font-size: 14px; word-break: normal; overflow-wrap: normal; } .gtr-container-x7y3z1 .gtr-main-title { font-size: 18px; font-weight: bold; margin-bottom: 20px; color: #0056b3; text-align: left !important; } .gtr-container-x7y3z1 .gtr-section-title { font-size: 16px; font-weight: bold; margin-top: 30px; margin-bottom: 15px; color: #0056b3; text-align: left !important; } .gtr-container-x7y3z1 img { margin-bottom: 15px; } .gtr-container-x7y3z1 .gtr-commitment-list { list-style: none !important; padding-left: 25px; margin-bottom: 15px; counter-reset: list-item; } .gtr-container-x7y3z1 .gtr-commitment-list li { position: relative; padding-left: 25px; margin-bottom: 8px; font-size: 14px; text-align: left !important; counter-increment: none; } .gtr-container-x7y3z1 .gtr-commitment-list li::before { content: counter(list-item) "." !important; position: absolute !important; left: 0 !important; color: #0056b3; font-weight: bold; width: 20px; text-align: right; } .gtr-container-x7y3z1 .gtr-separator { border-top: 1px solid #ccc; margin: 20px 0; } .gtr-container-x7y3z1 .gtr-editor-note { font-size: 12px; color: #666; text-align: left !important; } @media (min-width: 768px) { .gtr-container-x7y3z1 { padding: 30px 50px; } .gtr-container-x7y3z1 .gtr-main-title { font-size: 24px; } .gtr-container-x7y3z1 .gtr-section-title { font-size: 20px; } } Brictec Holds Grand Kick-off Meeting for the Iraq MUSK Block Production Project On December 8, 2025, Brictec successfully held the kick-off meeting for the Iraq MUSK Project at its headquarters. The MUSK Project is located in Kirkuk, Iraq, and is planned as a modern block production base with a daily output of 800 tons. The product range includes load-bearing blocks, standard bricks, and partition blocks, meeting various structural needs of local construction projects and providing stable, high-quality wall materials for regional urban development. The project is contracted by Xi'an Brictec engineering Co., Ltd. Building on the extensive construction and operation experience accumulated in the Nanjmadin Project, the MUSK project has been comprehensively upgraded in terms of process design, equipment configuration, energy efficiency control, automation level, production accuracy, and quality management. This enables higher production efficiency, stricter quality standards, and improved energy utilization. A key highlight of the project is the full adoption of LPG as a clean fuel, significantly reducing emissions, lowering operational risks, and enhancing environmental performance. The project is designed and implemented in accordance with advanced international standards, integrating the reliability of Chinese manufacturing with the rigor of European engineering. Upon completion, MUSK will become a benchmark factory for high-quality wall materials in Iraq, contributing to post-war reconstruction and showcasing the capability and commitment of Chinese engineering enterprises in the Middle East. Comprehensive Deployment at the MUSK Project Kick-off Meeting. During the meeting, Brictec management presented an overall introduction to the MUSK Project and conducted systematic deployment regarding key aspects such as project objectives, production line configuration, process requirements, market positioning, procurement standards, construction quality, safety assurance, and the production timetable. Department heads from all participating divisions—including the Technology Department, Engineering Department, Project Management Department, Procurement Department, Manufacturing Department, Sales Department, and Commercial Department—delivered speeches. They emphasized their commitment to: Strict professional discipline High standards in engineering and production quality Full-process responsibility and accountability Close cross-department collaboration to achieve all project milestones All departments expressed firm confidence and determination to ensure safe, efficient, and high-quality project execution, guaranteeing that the production line will be completed and commissioned on schedule with the expected capacity and product quality. A New Starting Point Toward High-Quality Construction The MUSK Project kick-off meeting marks the official start of full-scale project execution. Brictec will continue to leverage its technical expertise, project management capability, and manufacturing strength in the international building materials sector. Through scientific planning, refined construction management, and strict quality control, the company will ensure steady progress throughout all stages of the project. With strong responsibility, professionalism, and team collaboration, the project team is dedicated to building a benchmark block production plant in Iraq and contributing Brictec’s strength to local infrastructure development and economic revitalization. Editor: JF & Lou

Technical Analysis and Solution for Surface Cracks in Clay Fired Bricks I. Problem OverviewThe photo shows sintered clay bricks with visible surface cracking after firing. These cracks typically indicate internal stress imbalance or improper control during raw material preparation and kiln firing. Although the bricks may appear structurally complete, such cracks seriously affect the product’s mechanical strength, water absorption stability, and frost resistance — thus they are considered unqualified products in engineering applications. II. Causes from Raw Material Perspective1. Clay Plasticity and Shrinkage ImbalanceIf the clay has excessively high plasticity or contains a large proportion of fine particles (20%), drying stress increases sharply, making the surface prone to cracking before firing.Solution:(1) Control extrusion water content within 16–18%.(2) Use vacuum extrusion to remove air bubbles and achieve uniform density.3. Inadequate Aging or MixingInsufficient blending or aging leads to uneven moisture and plasticity in the clay body, resulting in internal stress concentration during drying and firing.Solution:(1) Increase mixing and aging time (at least 48 hours for new clay).(2) Ensure homogeneous blending of all additives and recycled materials. III. Causes from Firing and Kiln Control Perspective1. Rapid Drying or HeatingIf the initial drying or preheating temperature rises too fast, the surface of the green brick dries and hardens quickly, forming a “shell,” while the interior still contains moisture. The steam pressure generated inside causes the surface to crack.Solution:(1) Slow down the drying curve; control the initial heating rate within 20–30°C/h.(2) Extend the holding period in the drying zone to ensure even moisture removal.2. Overly Fast Temperature Rise in the Sintering ZoneWhen the temperature in the firing zone increases sharply, especially between 600–900°C (dehydroxylation and quartz phase transformation stages), the brick body expands unevenly and cracks.Solution:(1) Optimize the firing curve and smooth the temperature rise.(2) Keep the sintering zone temperature rise under 40°C/h through the quartz inversion phase.3. Improper Cooling RateIf cooling after sintering is too rapid, thermal shock causes cracks, especially for thick or dense products.Solution:(1) Control the cooling rate below 40°C/h from 900°C to 600°C.(2) Ensure the cooling air flow is even to avoid local thermal stress. IV. Process Optimization and Quality Control Recommendations1. Raw Material Testing: Regularly test plasticity index, drying shrinkage, and mineral composition of the clay.2. Forming Process: Ensure uniform extrusion pressure and avoid lamination defects.3. Drying Control: Use staged drying with automatic temperature and humidity adjustment.4. Kiln Operation: Monitor temperature curves and air distribution in real time; use infrared or thermocouple sensors.5. Post-Firing Inspection: Observe crack patterns — mesh-like cracks usually indicate shrinkage imbalance, while single long cracks often point to thermal stress. V. Brictec Conclusion1. Surface cracking in fired clay bricks is a result of combined effects of raw material composition, forming moisture, and firing regime.2. By optimizing clay blending, strictly controlling drying and firing curves, and improving temperature uniformity in the tunnel kiln, such defects can be effectively prevented.3. Through systematic process control, Brictec ensures that clay sintered bricks achieve dense texture, uniform color, and excellent mechanical properties, meeting high-end architectural and structural standards. Editor: JF & Lou