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Home » Kerui News » Calculation of G size refractory bricks for lime kiln and methods of construction

G1, G2, G3, G4, G5, G6, G7, G8 clay bricks and high alumina bricks, these types of refractory brick masonry round need to be carefully calculated. At the time of furnace design, it takes a lot of time and effort to calculate the brick type and quantity required for G-brick. Today, our company brings you specific calculation methods and construction points to help you in designing furnace models, calculating the purchase quantity and providing reference in construction.

**Calculation of the amount of furnace bottom**

The bottom part of the lime shaft kiln can be calculated by dividing the total volume of bricklaying by the volume of each brick. The number of bricks for each floor can be calculated by dividing the bottom of the furnace by the horizontal cross-sectional area of the brick by the corresponding surface area of each brick. Generally, the loss of 2% to 5% should be considered. If you need to calculate the weight of bricks, then use the weight of each brick multiplied by the number of bricks.

** Calculation of the amount of ring-shaped furnace body**

Other parts of the lime kiln are ring-shaped cylinder or cone, regardless of the upper and lower layers or the inner and outer layers, all to build out the ring ring. The ring must be built into the use of wedge-shaped brick. If you build a ring of any diameter, you need to use wedge-shaped bricks and straight bricks together. Generally G-1 straight brick and G-3 or G-5 wedge-shaped brick with, G-2 straight brick and G-4 or G-6 wedge-shaped brick with. Due to the requirement of the ring diameter is different so straight brick and wedge-shaped brick with the number of different.

**If G-3, G-4, G-5, G-6 wedge-shaped brick ring alone can be listed as Eq.**

**nx=(2πa)/(b-b1)**

**In this equation**

nx – the number of wedge-shaped bricks for building one ring, blocks.

a – length of the brick, mm.

b – width of the large end of the wedge-shaped brick, mm.

b1 – wedge-shaped brick small head width, mm.

From the above equation.

The number of wedge bricks used per ring, n, is only related to the width of the two heads of the wedge and the length of the bricks, but not to the diameter of the ring.

**This leads to.**

The number of bricks needed to build the ring with G-3 n = 97

The number of bricks needed to build the ring with G-4 n=87

The number of bricks needed to build the ring with G-5 is n=48

The number of bricks needed to build the ring with G-6 n=54

At the same time, the inner diameter of the ring built with the above four types of wedge bricks alone is 4150mm, 3450mm, 1840mm and 1897mm in that order.

If you want to masonry any diameter of the circle, need straight brick and wedge-shaped brick with the use of straight brick brick number can be calculated by the following equation.

**nz=(πd-nx*b1)/b**

**In this equation**

nz – the number of straight-shaped bricks, blocks.

nx – the number of wedge-shaped bricks, after the brick type is determined, is – a constant.

b1 – width of the small head of the wedge-shaped brick, mm.

b – width of straight bricks; mm.

d – the inner diameter of the ring, mm.

Example.

Try to build a circle with an inner diameter of 7.2 m using G-3 and G-1 bricks, and find the number of wedge-shaped bricks and the number of straight-shaped bricks required.

Solution.

nx=97 bricks

nz=(πd-nx*b1)/b=3.14*(7200-97*135)/150=65 pieces

Construction points of G firm bricks

When masonry lime kiln, the application of two brick types can be built into different diameters of the circle to adapt to the size of the furnace and the furnace diameter with the change in height. Generally with refractory brick G1 with G3 or G5 wedge-shaped bricks, refractory brick G2 with G4 or G6 wedge-shaped bricks. Because the ring diameter is different in the masonry process, the number of straight bricks and wedge-shaped bricks to match is also different.

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