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營口波海菱鎂材料有限公司          

聯系人:莊 延 山(先生)

地 址:大石橋市南樓經濟開發區高莊村

電 話:0417-5289488  13904074678

郵 箱:dsqbohai@126.com

郵 編:115100

 

Yingkou Bohai Magnesium Materials Co., Ltd.

Contact: Zhuang Yanshan (Mr.)

Location: Gaozhuang Village, Nanlou Economic Development Zone, Dashiqiao City

Phone call: +86 0417-5289488  +86 13904074678

Mailbox: dsqbohai@126.com 

Zip code: 115100

耐火材料典型產品輕燒鎂粉 Light refractory magnesium powder

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耐火材料典型產品輕燒鎂粉 Light refractory magnesium powder

發布日期:2017-11-01 00:00 來源:http://www.xaqinyun.com 點擊:

回轉窯式焚燒爐也稱為旋轉窯,是一個略為傾斜而內襯耐火磚的鋼制空心圓筒,大多數廢物物料是由燃燒過程中產生的氣體以及窯壁傳輸的熱量加熱的。固體廢物從前端送入窯中進行焚燒,以旋轉來達到攪拌廢物的目的。旋轉時須保持適當傾斜度,以利固體廢物下滑。此外,廢液及廢氣可以從窯頭或二燃室送入,甚至整桶裝的廢物也可送入回轉窯焚燒爐燃燒。

回轉窯焚燒技術是目前危險廢物焚燒技術中的最主流技術,是應用最多的爐型,是一種適應性很強,能焚燒多種固體、半固體、液體、氣體廢物的多用途焚燒爐,各種不同型態及形狀(顆粒、粉狀、塊狀及桶裝)的可燃性廢物皆可送入回轉窯中焚燒。危險廢物在回轉窯中焚燒,一般要經歷干燥、熱解、燃燒、燃盡等幾個階段。

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.

輕燒鎂粉

經過這幾個階段,危險廢物中的有害成分在高溫作用下被充分分解和破壞,形成高溫煙氣和爐渣。這些高溫煙氣和爐渣會對回轉窯內砌筑的耐火材料造成侵蝕性破壞。

(1)耐高溫性。能夠長期在 800 ℃以上的高溫環境下運行。

(2)高強度和優良的耐磨性。 輕燒鎂粉回轉窯內耐火材料需要具有一定的機械強度,以承受高溫時的膨脹應力及回轉窯殼體變形形成的應力。(3)良好的化學穩定性和熱穩定性,以抵抗煙氣中化學物質的腐蝕、能夠承受焚燒狀態下的交變熱應力。

(4)受熱膨脹穩定性要好。 回轉窯殼體的熱膨脹系數雖然大于回轉窯耐火材料的熱膨脹系數,但是殼體溫度一般都在150~300 ℃左右,而耐火材料承受的溫度一般都在 800 ℃以上,這樣可能會導致耐火材料比回轉窯殼體的熱膨脹要大,而容易脫落。焚燒的廢物由于成分復雜,對耐火材料具有很強的侵蝕作用,回轉窯耐火材料在運行一段時間后很容易出現耐火磚開裂,磚縫松動,圈與圈之間產生不同步位移和脫落等現象。

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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