耐火材料典型产品轻烧镁粉 Light refractory magnesium powder
发布日期：2017-11-01 00:00 来源：http://www.ykbhlm.com 点击：
Rotary kiln incinerator, also called rotary kiln, is a slightly inclined steel hollow cylinder lined with refractory bricks. Most waste materials are heated by the gas generated during the combustion process and the heat transmitted by the kiln wall. The solid waste is sent to the kiln from the front end for incineration, and it is rotated to achieve the purpose of stirring the waste. The rotation must be kept at an appropriate tilt to facilitate the sliding of solid waste. In addition, waste liquid and waste gas can be sent from the kiln head or the second combustion chamber, and even the whole barrel of waste can be sent to the rotary kiln incinerator for combustion.
Rotary kiln incineration technology is currently the most mainstream technology in hazardous waste incineration technology. It is the most widely used furnace type. It is a multi-purpose incinerator with strong adaptability and capable of incineration of a variety of solid, semi-solid, liquid and gas waste. Combustible wastes of various types and shapes (particulate, powder, block and barrel) can be sent to a rotary kiln for incineration. Hazardous waste is incinerated in a rotary kiln, which generally undergoes several stages such as drying, pyrolysis, combustion and burnout.
(1)耐高温性。能够长期在 800 ℃以上的高温环境下运行。
(4)受热膨胀稳定性要好。 回转窑壳体的热膨胀系数虽然大于回转窑耐火材料的热膨胀系数，但是壳体温度一般都在150～300 ℃左右，而耐火材料承受的温度一般都在 800 ℃以上，这样可能会导致耐火材料比回转窑壳体的热膨胀要大，而容易脱落。焚烧的废物由于成分复杂，对耐火材料具有很强的侵蚀作用，回转窑耐火材料在运行一段时间后很容易出现耐火砖开裂，砖缝松动，圈与圈之间产生不同步位移和脱落等现象。
After these stages, the harmful components in the hazardous waste are fully decomposed and destroyed under the action of high temperature, forming high temperature flue gas and slag. These high temperature flue gases and slag can cause erosive damage to the refractory materials built in the rotary kiln.
(1) High temperature resistance. Able to run in high temperature environment above 800 ℃ for a long time.
(2) High strength and excellent abrasion resistance. The refractory in the light-burned magnesium powder rotary kiln needs to have a certain mechanical strength to withstand the expansion stress at high temperature and the stress formed by the deformation of the rotary kiln shell. (3) Good chemical and thermal stability to resist the corrosion of chemical substances in the flue gas and to withstand the alternating thermal stress in the incinerated state.
(4) The thermal expansion stability is better. Although the thermal expansion coefficient of the rotary kiln shell is greater than the thermal expansion coefficient of the refractory of the rotary kiln, the shell temperature is generally around 150-300 ℃, and the temperature of the refractory is generally above 800 ℃, which may cause the refractory ratio The thermal expansion of the rotary kiln shell is large, and it is easy to fall off. Due to the complex composition of the incinerated waste, it has a strong erosion effect on the refractory materials. After a period of operation, the refractory materials of the rotary kiln are prone to cracking of the refractory bricks, loosening the brick seams, and causing asynchronous displacement and shedding between the circles .
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