Accurate Identification Of The Raw Materials Of Refractory Bricks
The different compositions of refractory bricks can be divided into five categories, つまり: silicon-aluminum alloy alkaline series refractory bricks, 耐火れんが, カーボンレンガ, zirconium refractory bricks, and heat insulation bricks. Alumina refractory bricks are the first. Silicon bricks are the first acid-resistant refractory bricks.
For coke oven construction first, but for various glass, セラミックス, carbon furnace, refractory brick vaults and other bearing parts of the bearing furnace, hot air furnace temperature high parts of the use, but should not be less than 600 ℃ and temperature fluctuations of heat equipment.
粘土レンガ, it is a blast furnace, 熱風炉, 加熱炉, ボイラー, lime kiln, rotary kiln ceramic refractory bricks.
ハイアルミナ耐火レンガ, high alumina refractory materials are composed of corundum, ムライト, とガラス相. The raw materials are natural ores of bauxite and silicate, as well as fused alumina, sintered alumina, mullite composition, and clinker of alumina and clay calcination. It is produced by sintering. でも, the commodity is also available as fused bricks, molten bricks, レンガ, and amorphous bricks. 高アルミナ耐火れんがは、鉄鋼業界で広く使用されています, 非鉄金属産業, その他の産業.
Corundum refractory brick, which is a kind of refractory brick with corundum as the first object, can be divided into sintered corundum brick, and electrofused corundum brick.
With the continuous development of the cement industry, the requirements for refractory materials have also been put forward higher. Refractory bricks are popular because of their high-temperature resistance. それで, how do friends know the quality of refractory bricks?
The refractory brick quality inspection method is usually hammer smash brick base, listening to their sound is determined, when a dull sound “, also confirmed the refractory material internal open space or level, this brick is not suitable for processing. When the sound is balanced. Confirmation of the internal structure of the brick is better. Suitable for processing; when the sound is very clear, close to the metallic sound. It is proven that the internal sintering of refractory bricks is high and the process is difficult. It has a high density, good detail, 高強度, and high thermal conductivity per unit volume component.
Refractory bricks have the following characteristics: 化学組成: the main components to determine the quality and performance of refractory materials; 圧縮強度: the ability to accept the maximum pressure (room temperature); 耐熱衝撃性: the ability to resist temperature changes without being destroyed. Flexural strength: the ability to accept shear pressure. 荷重軟化温度: also known as high-temperature load deformation temperature threshold, this parameter is very important to symbolize the high-temperature resistance of the material.
それで, is insulation brick good or refractory brick good
1. Thermal insulation performance
Refractory brick thermal conductivity is 1.0 (平均温度 350 ± 25 ℃) w / 上記のm.k, while the thermal conductivity of insulation brick is generally in 0.2-0.4 (平均温度 350 ± 25 ℃) w / m.k. This can be concluded that the insulation performance of the insulation brick than refractory brick insulation performance is much better.
2. 耐火物
The refractories of refractory bricks are above 1400 度, while the refractories of insulation bricks is mainly below 1400 度.
3. 密度
The density of refractory bricks is basically above 2.0g/cm³, while insulation bricks are mostly light insulation materials, and density is generally 0.8-1.0g/cm³.
包括的な, refractory bricks have high mechanical strength, 長寿命, 良好な化学的安定性, 素材と化学反応しない, 優れた高温耐性, 到達できる最高耐熱温度 1800 ℃. 特に高温および低温の変換炉での使用に適しています。, 変換炉, 水素化コンバーター, 脱硫タンク, and methanation furnaces in fertilizer plants, and also in hot air furnaces and heating conversion equipment in the steel industry.
Refractory brick has the advantages of high density, 高強度, 耐摩耗性, good corrosion resistance, small coefficient of thermal expansion, high grinding efficiency, low noise, 長寿命, and non-staining materials. It is a high-quality grinding medium adapted to various grinding machines.
Insulation brick has heat preservation and insulation: effectively reducing energy consumption. Fireproof: reach the national standard A grade. Clean, environmental protection: will not cause secondary pollution of the air. Light weight: each square meter only weighs about 1.4 kg, reducing the load of the building. Simple production: completely break through the traditional process, and greatly shorten the construction cycle. Aesthetic: adjustable to various colors, suitable for open installation. Durable: 長寿命. 7 major advantages.
耐火レンガと断熱レンガ とても違う, their use environment, 範囲, と役割は違います. 場所が違えば使用される素材も異なります, 材料の購入で, we have to decide which refractory material is suitable for their use according to their actual situation.
