【摘要】：本文針對(duì)連云港投產(chǎn)的石英熔融爐中,石英砂被加熱不均勻,石墨電極使用成本高,石英熔融爐耗能大的問題,研究并設(shè)計(jì)一種新型石英熔融爐節(jié)能加熱系統(tǒng)。本文圍繞上述方面內(nèi)容做如下工作：1)為了比較不同粒徑的石英砂對(duì)最終熔融石英產(chǎn)物的影響,對(duì)石英砂進(jìn)行破碎,磨粉和篩分預(yù)處理,對(duì)粒徑為75um的石英砂的熔點(diǎn)和比熱容進(jìn)行測(cè)量。通過比較不同粒徑,不同質(zhì)量的石英砂被中頻電磁感應(yīng)爐加熱熔融后的產(chǎn)物,得出以下結(jié)論：粒徑在6-50mm的石英砂,在電磁感應(yīng)爐中被加熱到1800℃以上可以得到外觀上符合要求的熔融石英。2)自行設(shè)計(jì)并搭建新型石英熔融爐節(jié)能加熱系統(tǒng),實(shí)驗(yàn)系統(tǒng)包括：大功率輸出電源,以串聯(lián)方式連接的石墨加熱元件,由氮化硼粉末、氧化鎂粉末、高溫耐火磚、硅酸鋁毛氈多層結(jié)構(gòu)組成的保溫層,以及水冷散熱系統(tǒng)。本文主要分析了1300℃之前,熔融爐實(shí)驗(yàn)臺(tái)內(nèi)各測(cè)量點(diǎn)的溫度分布與變化,得到以下結(jié)論：石墨加熱元件內(nèi)側(cè)用氮化硼粉末,外側(cè)用氧化鎂粉末,加熱過程中保溫層可以達(dá)到預(yù)期效果。在實(shí)驗(yàn)數(shù)據(jù)的基礎(chǔ)上對(duì)石英熔融爐實(shí)驗(yàn)臺(tái)進(jìn)行數(shù)值模擬,將模擬值與實(shí)驗(yàn)值進(jìn)行比較分析后進(jìn)行參數(shù)修正。3)以前文數(shù)值仿真得到的結(jié)果為基礎(chǔ),使用修正后的參數(shù),重新構(gòu)建三段式連續(xù)生產(chǎn)爐的模型,對(duì)石英砂在熔融后,利用谷電時(shí)間段,連續(xù)生產(chǎn)5天的過程進(jìn)行模擬,得到以下結(jié)論：所設(shè)計(jì)的保溫層在連續(xù)生產(chǎn)的過程中不會(huì)超過自身所能承受的溫度上限,連續(xù)生產(chǎn)爐工作時(shí)所需要的總功率為62.5 kW,總能耗為O.868kW·h/kg,現(xiàn)在投產(chǎn)的連云港石英熔融爐耗電量為1.786kW·h/kg,所設(shè)計(jì)的連續(xù)生產(chǎn)爐從模擬的結(jié)果上來看節(jié)約51%的耗能。
[Abstract]:In order to solve the problems of uneven heating of quartz sand, high cost of using graphite electrode and large energy consumption of quartz melting furnace in Lianyungang, a new type of energy saving heating system for quartz melting furnace is studied and designed in this paper. In order to compare the effect of quartz sand with different particle sizes on the final fused quartz products, the quartz sand was crushed, ground and sifted. The melting point and specific heat capacity of quartz sand with particle size of 75um were measured. By comparing the products of quartz sand with different particle size and different quality heated by medium frequency electromagnetic induction furnace, the following conclusions can be drawn: quartz sand with particle size in 6-50mm, When heated above 1800 鈩，

本文編號(hào)：2238340