The following parts of glass kilns should be dry-laid: pool bottom, pool wall, lower gap bricks, upper structure built with cast bricks, bridge bricks, heat storage chamber brick grid, small furnace, runner cast bricks, tin trough bottom, tin trough top, passage, material channel and parts that should be dry-laid as specified in the design. Other parts should be wet-laid.
Except for the expansion joints or fillers specified in the design, the bricks in the dry-laid masonry should be close to each other, and refractory powder should not be filled in the brick joints. Refractory bricks in dry-laid parts should be selected, processed and pre-laid.
The front wall arch, the supporting arch of the kiln arch, the pool wall, the flat arch of the small furnace mouth, the inclined arch of the variable span of the small furnace, the bridge brick, the arch of the partition device and the masonry built with cast bricks, etc., should be laid according to the manufacturer's assembly number. The arch should be pre-arranged before closing the door, and the joints of the closing door should be tight.
The large clay refractory bricks at the bottom of each part of the pool can be processed except the surface in contact with the glass liquid. The processed surface of the brick should be checked with a ruler and a square ruler, and the gap between the ruler and the brick surface should not exceed 1mm. The allowable deviation of the brick size should be ±1mm.
The large clay refractory bricks at the bottom of each part of the pool should be hoisted in place by vacuum suction cups, and should be carried out from the center line of each part to both sides. When laying the bottom of the molten pool, the position of the flat steel should be adjusted and temporary fixing measures should be taken. The temporary fixing measures should be removed after the construction is completed.
The brick joints of the pool bottom masonry should be aligned in the longitudinal and transverse directions except for the parts specially marked in the design. Expansion joints should be left at the brick joints according to the design, and the joints should be kept clean.
The upper surface of the pool bottom should be measured and leveled at the part where the pool wall is built. The outer edge of the pool bottom bricks shall not be within the outer edge of the pool wall bricks.
The corners of the pool wall should not be staggered. Unless otherwise specified in the design, the place should be built into straight joints along the longer pool wall surface. The pool wall bricks should be kept vertical, and the pool wall corners should be tightly connected.
When building an arch with an adjustable frame, a row of lock bricks should be driven in along the center line of the arch. After the lock bricks are driven in, the arch should be filled with thin refractory slurry.
After the first layer of arches such as the front wall arch and the partition device are built, the nuts of the tie rods should be tightened first, and then the upper arches should be built. The upper arches of the kiln arch, the front wall arch and the partition device should not be built tighter than the first layer of arches.
When the single-ring arch and bridge bricks of the front wall arch and the partition device are built, the center lines of the brick rings should be aligned with the center lines of the columns and the top tightening devices.
After the bottom, wall and upper structure of the molten pool are all built, the debris on the inner surface of the masonry should be removed with a steel brush and vacuumed.
Before the construction of the kiln arch insulation layer, the arch should be cleaned, sealed and defects repaired. The insulation layer of the pool wall, breast wall and small furnace should be constructed according to the design requirements.
The insulation layer of each part of the glass kiln shall not wrap the steel structure inside.
Regulations for the construction of heat storage chamber, flue and small furnace
When the flue wall or the heat storage chamber wall is built with bricks of two or more different materials, the inner and outer layers of bricks should bite each other every 500mm in the height direction.
The heat storage chamber grate should not be skewed, and the gap between the grate grate and the heat storage chamber wall should meet the design requirements. The grate grate door bricks shall not be processed.
The surface of the brick grid should be kept horizontal, and the upper and lower grid holes should be vertical. The gap between the brick grid and the wall should meet the design requirements. The horizontal observation hole and the horizontal grid hole should be aligned. The finished product should be protected during the construction process, and the grid holes should not be blocked.
The indoor flue or outdoor flue and the ascending flue should be built into a straight seam.
For a small furnace built with molten cast bricks, it is advisable to build the small furnace first and then the heat storage chamber wall.
The position and elevation of the flat steel or steel section should be adjusted before the small furnace is built.
When building the inclined arch of the small furnace, measures should be taken to prevent the inclined arch bricks from sliding down before the skeleton is tightened. The inclined arch of the small furnace built with silica bricks or magnesium bricks should be built with staggered joints.
After the small furnace arch is built, the small furnace arch top screws should be tightened evenly and symmetrically in sequence to make the arch gradually arch up and separate from the arch tire. The arch tire can be removed only after checking that there is no sinking, deformation and local subsidence.
Construction regulations for the melting part, the neck and the cooling part
The control lines of each section of the melting part, the neck and the cooling part should be positioned based on the center line of the No. 1 small furnace.
The elevation of the top surface of the melting part pool wall should not be lower than the elevation of the top surface of the cooling part pool wall.
Before building the kiln arch of the melting part and the cooling part, temporary fixing measures should be taken for the columns.
Before building the arch foot of the kiln arch, the arch foot brick supporting steel parts should be adjusted. The uneven places between the arch foot bricks and the supporting steel parts, and between the supporting steel parts and the columns should be leveled with steel plates. The distance between the arch foot bricks and the center line of the kiln arch, and the elevation of the arch foot bricks should comply with the design requirements.
Expansion joints should be left at the sections of the kiln arches in the melting section and the cooling section. When there is a supporting arch in the kiln arch, the arch foot of the supporting arch at the section to the arch top leveling bricks should be laid into a straight joint, and no expansion joints should be left.
When the kiln arch of the melting section is built, the locking bricks of the same layer of arches of all the supporting arches on each side of the kiln arch should be driven in at the same time. Before driving the locking bricks, temporary tightening measures should be taken outside the arch feet of the supporting arches at both ends of each side of the kiln arch.
During the kiln arch construction process, the tread plate should be used at any time to check the match between the brick surface and the kiln arch radius and make adjustments.
The ends of each kiln arch of the melting section and the cooling section should not be built with arch bricks with a width of less than 150mm.
After the kiln arch of the melting part and the cooling part is built, the nuts of the tie rods between the pairs of columns should be tightened step by step and evenly and symmetrically. The signs for checking the rise and sinking of the middle and two ribs of the arch should be set in advance. The kiln arch must be separated from the arch tire, and the arch tire should be removed after inspection when no sinking, deformation and local subsidence are found.
The bottom surface of the hook brick should be wet-laid and the top surface should be flat. A gap should be left between the inner arc surface of the hook brick and the support plate. Expansion joints should be left between the hook bricks. The gap between the upper gap brick and the kiln arch should be filled with thick refractory mud corresponding to the masonry. When laying the hook bricks and the breast wall, measures should be taken to prevent tipping into the kiln.
The kiln bottom with an insulation layer should be compacted with a refractory ramming material layer before laying the paving bricks.
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