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使用高溫電爐進行煅燒的原理及過程
眾所周知，高溫電爐的工藝可分為退火、回火、正火、燒結和煅燒等，前面四項工藝都比較常用，大家都已經比較了解了。今天我們著重講一下煅燒，煅燒就是指在一定溫度下，于空氣或惰性氣流中停止熱處置，稱為煅燒或焙燒;煅燒是自然化合物或人造化合物的熱離解或晶形轉變過程.
As we all know, the process of high temperature electric furnace can be divided into annealing, tempering, normalizing, sintering and calcining. The first four processes are commonly used, and we have a better understanding of them. Today we focus on calcination. Calcination refers to stopping heat treatment in air or inert gas flow at a certain temperature, which is called calcination or calcination; Calcination is a process of thermal dissociation or crystal transformation of natural or synthetic compounds
此時化合物受熱離解為一種組分更簡單的化合物或發作晶形轉變。碳酸鹽的熱離解稱為焙解。煅燒作業可用于直接處置礦物原料以適于后續工藝請求，也可用以化學選礦后期處置而制取化學精礦，滿足用戶對產品的請求。
At this time, the compound dissociates into a more simple compound or undergo a crystal transformation. The thermal dissociation of carbonate is called calcination. The calcination operation can be used to directly dispose mineral raw materials to meet the subsequent process requirements, and can also be used to prepare chemical concentrate for the later treatment of chemical beneficiation to meet the user's requirements for products.
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煅燒的主要過程是什么呢？且看以下內容：
What is the main process of calcination? Let's look at the following:
1.熱合成。除去化學分離水，CO2，NOx等揮發性雜質，在較高溫度下，氧化物還可能發作固相反響，構成有活性的化合狀態；
1. Thermal synthesis. In addition to the chemical separation of water, CO2, NOx and other volatile impurities, at higher temperatures, the oxide may also have a solid reaction, forming an active compound state;
2.再結晶，可得到一定的晶形、晶體大小、孔構造和比外表；
2. Recrystallization can obtain certain crystal shape, crystal size, pore structure and specific surface;
3.微晶恰當燒結，以進步機械強度。影響煅燒過程的主要要素：煅燒溫度、氣相成分、化合物的熱穩定性等。因而依據各種化合物（如碳酸鹽、氧化物、氫氧化物一硫化物、含氧酸鹽等）的熱穩定性不相同，采用控制煅燒溫度和氣相組成，能夠選擇性改動某些化合物的組成或發作晶形的轉變，再用相應辦法處置，能夠到達除去雜質和使有用組別離富集的目的。
3. Proper sintering of microcrystals to improve mechanical strength. The main factors affecting the calcination process are calcination temperature, gas phase composition, thermal stability of compounds, etc. Therefore, according to the different thermal stabilities of various compounds (such as carbonates, oxides, hydroxides sulfides, oxysalts, etc.), by controlling the calcination temperature and gas phase composition, we can selectively change the composition of some compounds or change the crystal form, and then dispose of them by corresponding methods, so as to remove impurities and enrich useful components.
以上就是使用高溫電爐進行煅燒的原理及過程，您學會了嗎？
The above is the principle and process of using high temperature electric furnace for calcination, have you learned it?
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