How to lay refractory bricks for furnace working lining?

　　Laying refractory bricks for a furnace working lining requires careful planning, preparation, and execution. Here are the general steps involved in laying refractory bricks:

　　1. Design and preparation:

　　Understand the furnace operating conditions, temperature range, and chemical environment to select the appropriate refractory brick type.

　　Calculate the required brick quantity, considering factors such as furnace dimensions, lining thickness, and any special shapes or cuts needed.

　　Prepare the foundation or substrate surface by ensuring it is clean, dry, and free from dust or contaminants.

　　2. Brick selection and storage:

　　Choose refractory bricks that are suitable for the specific application, taking into account temperature resistance, chemical compatibility, and mechanical strength.

　　Inspect the bricks for any defects, cracks, or damage. Discard any faulty bricks.

　　Store the bricks in a clean, dry area with proper protection against moisture or other potential sources of damage.

　　3. Mixing refractory mortar or castable:

　　Depending on the requirements, mix refractory mortar or castable according to the manufacturer's guidelines or specifications. Ensure the correct water-to-material ratio and proper mixing time.

　　4.Brick laying process:

　　Start from one corner of the furnace and work systematically, following a predetermined pattern.

　　Apply a thin layer of mortar or castable on the substrate surface using a trowel or mason's hawk.

　　Place the first brick firmly onto the mortar, ensuring it is level and well-aligned. Use a rubber mallet or hammer to tap it gently into position.

　　Apply mortar on the sides and bottom of the adjacent brick, then press it against the first brick, creating tight joints.

　　Continue this process, ensuring each brick is properly aligned and leveled. Maintain consistent joint thickness between the bricks.

　　Use a wet saw or brick chisel to cut bricks as needed to fit around corners, curves, or openings.

　　Check the alignment and levelness periodically using a spirit level or straightedge.

　　5.Joint filling and finishing:

　　After laying a row of bricks, fill the joints between the bricks with mortar or castable, ensuring they are completely filled without any voids.

　　Smooth the mortar surface using a trowel or jointing tool, removing excess mortar to achieve a neat and uniform appearance.

　　Allow the laid bricks to cure according to the manufacturer's instructions before subjecting them to heat or further construction activity.

　　6.Curing and drying:

　　Follow appropriate curing and drying procedures, which may involve gradually increasing the temperature over a specific period to allow for proper moisture removal and reduction of thermal stress.

　　Ensure proper ventilation and heat circulation during the curing process to prevent uneven drying or spalling.

　　It is crucial to consult with refractory experts or follow the guidelines provided by the refractory material manufacturer for specific instructions related to the furnace type, refractory brick type, and installation conditions. Adhering to best practices and safety measures throughout the entire process is essential to ensure a properly installed and long-lasting refractory lining.