本文選題：鋼渣 + 金尾礦　； 參考：《山東建筑大學(xué)》2017年碩士論文

【摘要】：隨著社會和經(jīng)濟(jì)的發(fā)展,人們對鋼鐵和黃金的需求量日益增大,隨之而來的鋼渣和金尾礦的排放量與日俱增,為社會發(fā)展帶來了嚴(yán)重負(fù)擔(dān)。本論文創(chuàng)新性的以鋼渣和金尾礦為主料,輔以合適比例的添加劑,尋求最佳工藝方法制備出性能良好的鋼渣-金尾礦復(fù)合微晶玻璃,有廣闊的應(yīng)用前景。根據(jù)鋼渣和金尾礦的特性,并通過前期實驗探索,本文將鋼渣和金尾礦總用量控制在90%,選取鋼渣含量分別占總量的85%、80%、75%、70%、65%、60%六組配方進(jìn)行實驗。利用DTA熱分析儀確定了鋼渣-金尾礦微晶玻璃的熱處理制度,對基礎(chǔ)玻璃和熱處理后的微晶玻璃進(jìn)行XRD分析,并用掃描電子顯微鏡觀察了樣品表面形貌。同時對鋼渣-金尾礦復(fù)合微晶玻璃的抗折強(qiáng)度、密度、耐腐蝕性進(jìn)行了測定,最終得出制備鋼渣-金尾礦復(fù)合微晶玻璃的最佳配方和熱處理制度。鋼渣-金尾礦復(fù)合微晶玻璃的物相種類不隨原料配比變化,六組配方均以普通輝石為主晶相,以透輝石為次晶相。其衍射峰強(qiáng)度隨金尾礦摻量的增加而增強(qiáng)。并且隨著金尾礦摻量增加,微晶玻璃樣品的晶粒尺寸越來越小且趨于均勻,尺寸在0.1~1μm之間。微晶玻璃樣品的抗折強(qiáng)度和密度隨金尾礦摻量的增加先增大后減小,耐酸性隨金尾礦摻量增加越來越好,耐堿性則相反。當(dāng)鋼渣含量為70%,金尾礦摻量為20%獲得的微晶玻璃性能最佳,其抗折強(qiáng)度達(dá)到171.7 MPa,密度達(dá)到2.8g/cm3,并有較好的化學(xué)穩(wěn)定性。在鋼渣/金尾礦比例實驗的基礎(chǔ)上,對最佳比例的4#(鋼渣70%,金尾礦20%)樣品進(jìn)行了最佳熱處理制度的實驗研究,分析了熱處理制度的變化對微晶玻璃物相、表面形貌和性能的影響。實驗結(jié)果表明:微晶玻璃的物相種類不隨熱處理制度的變化而變化,均是以普通輝石為主晶相,以透輝石為次晶相,衍射峰強(qiáng)度隨熱處理溫度的升高和熱處理時間的延長而增強(qiáng)。熱處理溫度升高和熱處理時間延長會使樣品中晶粒長大并趨于均勻致密,但溫度過高和時間過長會導(dǎo)致樣品中出現(xiàn)微裂紋,當(dāng)熱處理溫度870℃熱處理120min時,樣品表面晶粒均勻致密。4#微晶玻璃樣品的抗折強(qiáng)度和耐酸堿腐蝕性隨熱處理溫度增加和熱處理時間延長先增大后減小,樣品整體耐酸性要好于耐堿性,密度隨溫度增加和時間延長逐漸增大并最后趨于一致。最終確定其最佳熱處理溫度870℃,熱處理時間120min,此時抗折強(qiáng)度達(dá)到171.7MPa,密度2.8 g/cm3,經(jīng)酸溶液腐蝕后的質(zhì)量損失率為0.18%,經(jīng)堿溶液腐蝕后的質(zhì)量損失率為0.22%。
[Abstract]:With the development of society and economy, the demand for steel and gold is increasing day by day, and the discharge of steel slag and gold tailings is increasing, which brings a serious burden to the social development.In this paper, steel slag and gold tailings are used as main materials and the appropriate proportion of additives are used to find the best process to prepare the steel slag-gold tailing composite glass-ceramics with good performance, which has a broad application prospect.According to the characteristics of steel slag and gold tailings, and through the previous experiment, the total amount of steel slag and gold tailings is controlled at 90%, and the 85% steel slag content is selected for the experiment.The heat treatment process of the glass-ceramics of steel slag and gold tailings was determined by DTA thermal analyzer. The basic glass and the glass-ceramics after heat treatment were analyzed by XRD, and the surface morphology of the samples was observed by scanning electron microscope (SEM).At the same time, the flexural strength, density and corrosion resistance of steel slag-gold tailing composite glass-ceramics were determined. Finally, the optimum formula and heat treatment system of preparing steel slag-gold tailing composite glass-ceramics were obtained.The phase types of steel slag-gold tailing composite glass-ceramics do not change with the ratio of raw materials. The six formulations are composed of ordinary pyroxene as main crystal phase and diopside as secondary crystal phase.The diffraction peak intensity increases with the increase of the amount of gold tailings.With the increase of gold tailing content, the grain size of glass-ceramics becomes smaller and more uniform, and the size is between 0.1 渭 m and 0.1 渭 m.The flexural strength and density of glass-ceramics samples first increase and then decrease with the increase of the amount of gold tailings, the acid resistance increases with the increase of gold tailing content, and the alkali resistance is opposite.When the steel slag content is 70 and the gold tailings content is 20%, the glass-ceramics with a flexural strength of 171.7 MPA, a density of 2.8 g / cm ~ 3 and a good chemical stability are obtained.On the basis of the experiment of steel slag / gold tailings ratio, the optimum heat treatment system of 4#steel slag / gold tailings sample was studied, and the effect of heat treatment system on glass-ceramics phase was analyzed.Effects of surface morphology and properties.The experimental results show that the types of phases of glass-ceramics do not change with the change of heat treatment system. They are mainly composed of ordinary pyroxene and diopside as secondary phase.The intensity of diffraction peak increases with the increase of heat treatment temperature and heat treatment time.The increase of heat treatment temperature and the prolongation of heat treatment time will result in the grain growth and uniform densification in the sample, but if the temperature is too high and the time is too long, there will be microcracks in the sample. When the heat treatment temperature is 870 鈩，

本文編號：1758781