The autoclave curing process following the cutting of the embryo blocks in the aerated block production line is a crucial step, directly impacting the quality and performance of the final products. Below is a detailed introduction to this process:

I. Overview of Autoclave
The autoclave, also known as the steam curing autoclave or pressure steam autoclave, serves as the core equipment in the production of aerated concrete blocks. Primarily composed of flanges, a cylindrical body, and a cover, it is a horizontal steel cylinder device. Depending on the opening direction, autoclaves are classified into top-opening and side-opening types, with extensive applications in the steam curing and curing of various building materials such as aerated concrete blocks and concrete pipe piles.

II. Steam Curing Process
Steam curing typically comprises three stages: heating, constant temperature, and cooling, each significantly influencing the final quality of the product.

Heating Stage:
During this stage, the temperature and pressure inside the autoclave gradually increase, providing the necessary thermal and pressure environment for the embryo blocks.
The heating rate must be strictly controlled, generally not exceeding 20°C/hour initially, to prevent cracks caused by rapid temperature rise.

Constant Temperature Stage:
At this stage, the temperature and pressure within the autoclave remain constant, allowing the embryo blocks to undergo thorough hydration reactions under high temperature and pressure.
The duration of the constant pressure period is determined based on the specific conditions of the embryo blocks and product quality requirements, ensuring that the blocks achieve the desired physical and mechanical properties.

Cooling Stage:
The cooling rate must also be carefully controlled, generally not exceeding 20°C/hour, to prevent cracks from rapid cooling.
During winter, due to lower outdoor temperatures, it is advisable to cool the blocks inside the autoclave to below 30°C before removing them to prevent cracks caused by excessive temperature differences.

III. Autoclave Operation Procedure
The operation procedure of the autoclave typically involves the following steps:

Loading:
The cut embryo blocks are conveyed into the autoclave and arranged neatly.
The autoclave door is closed, and safety and sealing operations are performed.

Curing:
Evacuation: Prior to pressure increase, evacuation is conducted to remove air from the autoclave, enhancing the curing effect.
Heating, Constant Temperature, and Cooling: These operations are performed according to the preset program.

Unloading:
After the curing process is complete, pressure relief is performed.
The autoclave door is opened, and the cured products are removed.
The interior of the autoclave is cleaned and maintained for the next curing cycle.

IV. Precautions
Safety Operations: As the autoclave is a special equipment, operators must undergo professional training and hold valid licenses. Strict adherence to safety and operational regulations is mandatory.

Quality Control: The temperature, pressure, and time parameters during steam curing significantly impact product quality, necessitating strict adherence to process requirements.

Equipment Maintenance: Regular cleaning, inspection, and maintenance of the autoclave are crucial to ensure its optimal condition and prolong its service life.

In conclusion, the autoclave curing process following embryo block cutting in the aerated block production line is a complex yet vital procedure. Only by rigorously controlling the parameters and operational procedures of each stage can high-quality, high-performance aerated concrete block products be produced consistently.