Synthesis of mullite

Synthesis of mullite raw refractory material preparation is divided into dry and wet. The main rotary kiln and tunnel kiln. Dry process is the batch mixture into the ball mill or a mixing machine to mix together, after the ball or compacting pressure with rotary kiln or tunnel kiln firing; wet process is will cooperate with material and water of wet ball mill are added and mixed grinding, press mud into the mud cake, by vacuum extrusion molding machine squeeze into mud or clay were used for calcination in rotary kiln or tunnel kiln.

Wet process of Mo normal synthetic mullite billet temperature lower reaction is complete, mullite content is high, good uniformity; tunnel kiln to calcine to control mo mullite clinker microstructure and crystal growth.

General Low aluminum mullite and alumina mullite can be obtained by single natural raw materials direct calcination, such as calcined kaolin and calcined kyanite, etc., ingredients and production process is relatively simple. Kyanite as raw material, because of Kyanite in the heat expansion is bigger, is not easy to get the dense clinker, usually need to first part of calcined kyanite (1500-1550 DEG C), and then crushed, add 25% – 30% of the refractory clay. If the kyanite calcined beforehand, the kyanite in ball mill for fine grinding to reduce the calcination of expansion, usually by adding 10-%35% plastic clay as binder, calcination temperature not less than 1380 DEG C.

Refractory brick patching principle

Fire bricks used a certain degree of damage to the phenomenon, there will be a problem to repair and that in the fire brick problems in repair, and we should follow the principle:

1 refractory brick must be used with the same factory as the same manufacturers of the same batch of bricks;

2 use the same time as the old brick and the same time to repair the remaining scattered brick (Note: the use of damp or damaged brick is prohibited to use);

The contact surface of 3 new and old brick must be lighter mud;

Between the 4 old brick interface cannot make iron;

5. Lock hole brick on both sides of the brick joints cannot be beat iron, two adjacent ring brick iron to staggered, with a piece of brick on both sides cannot play an iron plate.

6 irons must be completely into brick seam;

7 before the closure of a few of the ring block must be from the side of the  firebrick, and the last part of the use of a positive plug brick sealing;

8 in strict accordance with the design of the proportion of bricks masonry not free to change the masonry ratio;

9. Patching brick expansion joint board shall not tear apart and patching brick must wet masonry (fire mud plumpness should reach more than 95%, is strictly prohibited no fireclay brick head, head of fireclay, if appear this kind of circumstance, should be promptly removed heavy masonry;

10 people when not used as much as possible (or reduce the use of brick processing).

Well. The above is the today to introduce to everybody refractory brick patching the principle of knowledge, welcome everybody to click to read.

Refractory brick patching matters needing attention

The refractory brick patching the principle is dug from the brick the weakest point in the opening, but not at the same time digging bricks above the ring. If it is continuous to prevent the whole brick polycyclic scarf, loose, must first dig 2 ring before continuing back patching. Dig brick to observe the tightness of domain blocks, if loose brick whole happen immediately stop patching, lock brick iron loose bricks on both sides of the annular gap in tight, after fastening confirmation not loose rear can continue the scarf homework.

In the basic brick patching, if occurs the strength of the old brick itself seriously insufficient or alkali erosion serious suggestions will be replaced as a whole bricks, especially main burning area of brick at the age of two years scarf should be cautious. Parts of the tire patching note remaining old bricks whether there is distortion of large fault or a brick serious phenomenon, if there is a must check tire clearance and drum ovality, also recommended tire parts of the brick to replace the whole.

Well, above is today to introduce to everyone of the refractory brick patching precautions knowledge, welcome everybody to click to read.

Refractory brick patching matters needing attention

The refractory brick patching the principle is dug from the brick the weakest point in the opening, but not at the same time digging bricks above the ring. If it is continuous to prevent the whole brick polycyclic scarf, loose, must first dig 2 ring before continuing back patching. Dig brick to observe the tightness of domain blocks, if loose brick whole happen immediately stop patching, lock brick iron loose bricks on both sides of the annular gap in tight, after fastening confirmation not loose rear can continue the scarf homework.

In the basic brick patching, if occurs the strength of the old brick itself seriously insufficient or alkali erosion serious suggestions will be replaced as a whole bricks, especially main burning area of brick at the age of two years scarf should be cautious. Parts of the tire patching note remaining old bricks whether there is distortion of large fault or a brick serious phenomenon, if there is a must check tire clearance and drum ovality, also recommended tire parts of the brick to replace the whole.

Well, above is today to introduce to everyone of the refractory brick patching precautions knowledge, welcome everybody to click to read.