【摘要】：天然金紅石和人造金紅石是提煉金屬鈦的重要礦物原料之一,同時(shí)是生產(chǎn)高檔電焊條和金紅石型鈦白粉的最佳原料。目前,可利用的高品位天然金紅石的供應(yīng)量急劇減少,探索一種在較低的能源消耗和較小的環(huán)境污染下生產(chǎn)人造金紅石的方法已經(jīng)日趨迫切。因此,從可以大量利用的鈦渣資源中制備人造金紅石成為一種發(fā)展趨勢(shì)。與此同時(shí),開發(fā)一種環(huán)保、節(jié)能的生產(chǎn)人造金紅石的新方法,成為全球科學(xué)家的研究重點(diǎn)。本文以西南某地出產(chǎn)的高鈦渣為研究對(duì)象,通過運(yùn)用微波加熱技術(shù)和一些其他技術(shù)方法,提出了一種新型冶煉工藝,用來制備人造金紅石。通過分析酸浸-焙燒工藝處理后的產(chǎn)物,可以發(fā)現(xiàn)：隨著Na2CO3/鈦渣質(zhì)量比、保溫時(shí)間、微波焙燒溫度以及硫酸的濃度的變化,Ti3O5型固溶體開始消失,金紅石TiO2生成。物料表面發(fā)生比較大的變化,在表面出現(xiàn)裂痕,而且有棒狀物體出現(xiàn)。通過對(duì)實(shí)驗(yàn)參數(shù)進(jìn)行響應(yīng)曲面優(yōu)化,結(jié)果表明,當(dāng)Na2CO3/鈦渣質(zhì)量比為0.30時(shí),在焙燒溫度850℃下保溫60 min為最優(yōu)實(shí)驗(yàn)方案。此時(shí),TiO2含量的預(yù)測(cè)值為94.11%,實(shí)驗(yàn)值為94.24%,其相對(duì)誤差為0.14%。本文將微波活化焙燒-酸浸新工藝用于處理高鈦渣,取得了良好的效果,為大量生產(chǎn)高檔電焊條和金紅石型鈦白粉提供了良好的條件。
[Abstract]:Natural rutile and manmade rutile are one of the important mineral materials for the extraction of titanium, and the best raw materials for the production of high grade electrode and rutile titanium dioxide. At present, the available supply of high grade natural rutile has been reduced sharply, so it is increasingly urgent to explore a method to produce artificial rutile under lower energy consumption and less environmental pollution. Therefore, the preparation of artificial rutile from the large amount of titanium slag resources has become a development trend. At the same time, the development of an environmentally-friendly, energy-efficient method for the production of artificial rutile has become the focus of global scientists. In this paper, a new smelting process for the preparation of artificial rutile is proposed by using microwave heating technology and some other technical methods, taking the high titanium slag produced in southwest China as the research object. By analyzing the product of acid leaching and calcination process, it can be found that with the change of Na2CO3/ slag mass ratio, holding time, microwave calcination temperature and sulfuric acid concentration, the Ti _ 3O _ 5 solid solution begins to disappear and rutile TiO2 is formed. The surface of the material has a relatively large change, cracks appear on the surface, and there are rod-shaped objects. By optimizing the experimental parameters, the experimental results show that when the mass ratio of Na2CO3/ titanium slag is 0.30, the optimal experimental scheme is to keep heat preservation for 60 min at the calcination temperature of 850 鈩，

本文編號(hào)：2211688