Yingfeng Machinery－More Than 30 Years Experience In Clay Brick Making Machine ,Tunnel Kiln, Rotary Tunnel Kiln.
How to Make Fired Bricks？
2026-04-02
The production of fired bricks is a tightly integrated process combining raw material proportioning, forming, drying, and high-temperature firing. Its core principle is to trigger physical and chemical reactions at high temperatures to sinter the brick body, thereby endowing it with high strength and durability. The full standard production process for fired bricks is as follows:
1. Raw Material Preparation and Proportioning
Main raw materials (clay, shale, coal gangue) are crushed and ground by crushers and pulverizers,then blended with water in a mixer, with impurities sieved out.
2. Green Brick Forming
The mixed clay material is piled up for ageing. It is then fed into a vacuum extruder to extrude clay strips, which are cut into standard green bricks by an automatic brick cutter. The wet green bricks are neatly stacked on kiln cars manually or by automatic stacking machines before being sent to the drying kiln.
3. Green Body Drying
Freshly formed green bricks have a high moisture content (approximately 15%–25%). Direct firing would cause rapid water evaporation and crack the bricks. Low-temperature drying is therefore essential. Stacked wet green bricks are conveyed into a tunnel drying kiln and dried at a low temperature using waste heat from the firing process to control moisture and prevent cracking.
4. High-Temperature Firing
Dried green bricks are transported on kiln cars into a tunnel kiln or annular kiln for gradient heating and sintering at 900–1100°C. The high temperature fuses and shapes the raw materials, hardening and strengthening the bricks.
5. Cooling and Finished Product Treatment
Bricks are slowly cooled in the dedicated cooling zone inside the kiln. After exiting the kiln, qualified products are sorted manually or mechanically, then stacked for delivery from the factory.
Related questions
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Is An Automatic Brick Stacking Machine Worth It? 3-Year ROI and Cost Analysis
For overseas brick plant owners, high labor costs, unstable manual brick stacking, and excessive brick damage rates are the top operational pain points that severely reduce factory profit margins. Most brick factory operators struggle to decide whether to purchase an automatic brick stacking machine, worried about high upfront equipment investment. In practical brick production operations, a fully automatic brick palletizing machine can perfectly replace 6 to 8 on-site manual stacking workers. For medium-sized and large-scale automated brick plants, the one-time investment of an automatic brick stacking machine can be fully recovered within 2 to 3 years. After crossing the ROI payback period, the equipment delivers stable 24-hour production, zero manual operation errors, and long-term operational cost savings, making it one of the most cost-effective profit-upgrading equipment for modern brick factories.
Manual Brick Stacking vs Automatic Brick Stacking Machine: Full Cost and Benefit Comparison
1. Labor Cost Gap
Traditional manual brick stacking relies entirely on 8 to 10 skilled workers to complete green brick stacking, placement and kiln entry work. Overseas brick manufacturing industries are currently facing universal challenges: rising local labor wages, high worker turnover rates, and unstable on-site attendance. Unstandardized manual operation easily causes misplaced bricks, irregular stacking, green brick collision damage and low production efficiency. These manual drawbacks not only lower finished brick quality but also delay delivery cycles and increase daily factory management costs.
In comparison, an automatic brick stacking machine only requires one-time upfront equipment investment, with no recurring labor expenses. The automated stacking equipment features ultra-low daily power consumption and requires almost no manual intervention. It supports non-stop 24-hour industrial production all year round, completely solving the problems of worker rest, attendance instability and high labor costs, and maximizing the effective production capacity of the brick production line.
2. Product Quality & Defect Rate Optimization
Manual brick stacking quality is greatly affected by worker proficiency, physical fatigue and operational attitude. Long-time repetitive work inevitably causes uneven green brick stacking, collision deformation and surface damage. Statistical data of overseas brick plants shows that manual stacking leads to a monthly brick defective and damage rate of 3% to 5%, bringing huge invisible economic losses to brick factory operations.
Equipped with precision servo positioning and standardized mechanical stacking procedures, the automatic brick stacking machine fundamentally eliminates human errors in brick production. It maintains consistent stacking accuracy and neat placement of green bricks every day, effectively reducing the monthly brick damage rate by 3%-5%. Stable and high-quality finished brick products greatly enhance market competitiveness, helping brick factories win more local construction project orders and long-term cooperative customers.
3. Exact 3-Year ROI Calculation for Brick Plants
For medium and large-scale brick plants with stable daily output, continuous order supply and formal standardized operation, the comprehensive benefits brought by the automatic brick stacking machine are extremely prominent. The saved labor costs, reduced brick scrap losses, and improved production efficiency can fully offset the one-time equipment investment, realizing complete cost recovery within 2 to 3 years, which is a stable and low-risk industrial investment.
After the 2-3 year payback period, the automatic brick stacking machine enters a pure profit stage. The equipment continuously reduces factory labor costs and product scrap rates, and effectively increases daily output and production efficiency. In the long run, it greatly optimizes the overall production cost structure of the brick plant and significantly improves the net profit margin of brick manufacturing.
Frequently Asked Questions About Automatic Brick Stacking Machines
Q1: Are automatic brick setting machines suitable for small brick factories?
Yes. Small brick factories with a daily output of over 8,000 standard bricks are very suitable for installing automatic brick stacking machines. Although small-scale brick plants have lower production capacity than large factories, the long-term savings in labor costs and the reduction of brick damage losses can bring stable and reliable investment returns. It is a forward-looking upgrade choice for small brick factories that plan to expand production scale and improve automation level.
Q2: Is the daily maintenance of automatic brick setting machines complicated?
Automatic brick stacking machines adopt simplified and wear-resistant industrial structure design, with ultra-low failure rate and stable long-term operation performance. The daily maintenance work is simple, labor-saving and time-efficient, requiring no professional senior technical personnel. Factory staff can master all daily inspection, cleaning and maintenance skills through basic free training, with extremely low later operation and maintenance costs.
For all formal overseas brick plants with stable production demands and long-term operation plans, investing in an automatic brick stacking machine is absolutely worthwhile. This automated brick stacking equipment perfectly solves the core pain points of high manual labor costs, unstable brick quality and high product scrap rates, helping traditional brick factories realize standardized, intelligent and low-cost production. It is an essential upgrade equipment for modern brick plants to reduce operational costs and increase long-term profits.
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How Optimized Kiln Ventilation and Heat Exchange Reduce Energy Consumption in Fired Brick Production？
High energy consumption is one of the biggest operational challenges for modern tunnel kiln brick plants and automatic clay brick production lines worldwide. For brick manufacturers aiming to cut operational costs and boost profit margins, optimizing tunnel kiln ventilation and internal heat exchange is the most practical, cost-efficient solution to lower fuel consumption while stabilizing brick firing quality. Mastering core kiln airflow and heat exchange principles is essential for low-carbon, energy-saving brick manufacturing operations.
The entire firing process in a tunnel kiln is a continuous circulating heat exchange process between unfired green brick blanks and high-temperature flue gas generated by fuel combustion. During mass production, fuel combustion releases massive thermal energy, which transfers to brick blanks to raise their internal temperature gradually. Once the temperature reaches the critical standard for chemical reactions of raw materials including clay, shale, coal gangue and fly ash, all internal components of brick blanks react completely, forming high-quality qualified solid bricks and hollow fired bricks.
Airflow circulation penetrates every key stage of brick firing, making it an indispensable element for normal kiln operation. Fuel combustion requires sufficient oxygen, which is delivered to the high-temperature firing zone by preheated airflow from the kiln cooling zone; the preheated hot air further accelerates full fuel combustion and improves combustion efficiency. High-temperature flue gas serves as the primary heat transfer medium, responsible for preheating wet brick blanks and sustaining constant firing temperature in the firing zone. After sintering, high-temperature finished bricks are cooled to room temperature by incoming cold airflow for smooth kiln discharge. In addition, the removal of residual moisture from wet green bricks and continuous preheating of dry blanks entirely rely on hot flue gas flowing from the firing zone to the preheating zone.
It is evident that stable, orderly gas flow is the basic guarantee for complete brick sintering. To fundamentally cut down the energy consumption of brick production with gas-fired tunnel kiln equipment, manufacturers must prioritize optimizing two core indicators: kiln ventilation efficiency and internal heat exchange performance. Scientific airflow management eliminates incomplete fuel combustion and invalid heat loss, enabling low-energy, high-yield, high-stability operation for all types of brick factories.
Professional kiln energy saving does not rely on blind fuel reduction, which easily causes unqualified brick products. Instead, it focuses on improving the overall heat transfer efficiency inside the kiln through optimized ventilation and heat exchange systems. This technology maximizes the thermal utilization rate of fuel combustion, avoids repeated heating and redundant fuel waste, effectively reduces comprehensive production costs, and helps brick manufacturing enterprises comply with global green and low-carbon building material production standards.
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