本文選題：高鈦渣　切入點：人造金紅石　出處：《昆明理工大學(xué)》2017年碩士論文

【摘要】：二氧化欽俗稱鈦白,在物理化學(xué)性質(zhì)方面都比較穩(wěn)定。同時,具有折射率高、遮蓋力大、著色力強、抗粉化性等優(yōu)良的光學(xué)與電學(xué)性能。所以被廣泛應(yīng)用在造紙、塑料、油漆、油墨、搪瓷、電工、冶金、化工等領(lǐng)域。現(xiàn)今,工業(yè)生產(chǎn)鈦白的方法有兩類:一是硫酸法生產(chǎn)鈦白;二是氯化法生產(chǎn)鈦白。金紅石是一種生產(chǎn)鈦白的重要原料,隨著鈦工業(yè)的不斷發(fā)展,對天然金紅石的過度地開采,造成現(xiàn)可供應(yīng)的天然金紅石已經(jīng)逐漸枯竭。而人造金紅石在性能等方面與天然金紅石相似,可作為天然金紅石的優(yōu)質(zhì)替代品。因此不斷探索生產(chǎn)人造金紅石的新的工藝,成為鈦工業(yè)發(fā)展不可忽略的趨勢。本文以云南某地區(qū)的高鈦渣作為原料,結(jié)合微波加熱技術(shù),提出了一種“高鈦渣-堿浸-微波焙燒-酸浸-煅燒”的微波處理高鈦渣的工藝路線。微波加熱技術(shù)應(yīng)用于冶金材料領(lǐng)域,是近年來發(fā)展起來的一項新的冶金技術(shù)。作為一種清潔能源用于加熱技術(shù),具有選擇性加熱、加熱均勻、熱轉(zhuǎn)化效率高、整體加熱等優(yōu)勢。本文采用化學(xué)成分分析、粒度分析、TG-DSC分析、XRD分析、SEM-EDS分析、Raman分析、FT-IR分析、XPS分析等現(xiàn)代測試表征手段,對原料及經(jīng)“高鈦渣-堿浸-微波焙燒-酸浸-煅燒”處理后得到的產(chǎn)品,進行化學(xué)成分、粒度組成、升溫特性、物相結(jié)構(gòu)、表觀形貌及組成官能團等考察分析。并通過研究各過程的相關(guān)原理及探索最佳的工藝參數(shù),得到的最佳的實驗條件參數(shù)是:堿浸實驗條件:溫度94℃,堿液濃度80 g/L,液固比6:1,時間60 min;微波焙燒條件:溫度為850℃,時間為120 min,Na2CO3/鈦渣質(zhì)量比為0.25;酸浸實驗條件:酸浸溫度94℃,硫酸濃度30%,時間為4h;煅燒實驗條件:溫度950℃,時間30min,通過實驗?zāi)軌颢@得TiO2含量在89%以上的高品質(zhì)的人造金紅石產(chǎn)品。本文對高鈦渣進行了合理的利用,提出了“高鈦渣-堿浸-微波焙燒-酸浸-煅燒”工藝路線,該工藝路線實驗效果良好,為深度開發(fā)與合理利用鈦資源提供了一條新的途徑。
[Abstract]:Titanium dioxide, commonly known as titanium dioxide, is relatively stable in physical and chemical properties. At the same time, it has excellent optical and electrical properties such as high refractive index, large shading power, strong coloring power, anti-powdering ability, etc., so it is widely used in paper making, plastics, paint, etc. Printing ink, enamel, electrician, metallurgy, chemical industry, etc. Nowadays, there are two kinds of methods for producing titanium dioxide in industry: one is to produce titanium dioxide by sulfuric acid; the other is to produce titanium white by chlorination. Rutile is an important raw material for producing titanium dioxide. With the continuous development of the titanium industry, the excessive exploitation of natural rutile has resulted in the gradual depletion of the available natural rutile, and the artificial rutile is similar to natural rutile in performance and other aspects. It can be used as a good substitute for natural rutile. Therefore, it has become a trend that the titanium industry can not be ignored by exploring the new technology of producing artificial rutile. In this paper, the high titanium slag from a certain area of Yunnan is used as raw material, combined with microwave heating technology. A method of microwave treatment of high titanium slag with "high titanium slag, alkali leaching, microwave roasting, acid leaching and calcination" was put forward. Microwave heating technology was applied to metallurgical material field. It is a new metallurgical technology developed in recent years. As a kind of clean energy used in heating technology, it has the advantages of selective heating, uniform heating, high thermal conversion efficiency and integral heating. The chemical composition and particle size composition of the raw materials and the products obtained after the treatment of "high titanium slag, alkali leaching, microwave roasting, acid leaching and calcination" were analyzed by means of modern means such as FT-IR analysis and XPS. The characteristics of temperature rise, phase structure, apparent morphology and composition of functional groups were investigated and analyzed. By studying the relevant principles of each process and exploring the best technological parameters, the optimum experimental parameters were obtained as follows: alkali leaching experiment conditions: temperature 94 鈩，

本文編號：1662371