本文選題：鋼渣 + 粉煤灰�。� 參考：《貴州大學(xué)》2015年碩士論文

【摘要】：采用貴州省某鋼廠的轉(zhuǎn)爐渣和國(guó)內(nèi)某電廠的粉煤灰,在不添加其它晶核劑的基礎(chǔ)上,利用轉(zhuǎn)爐渣和粉煤灰中含有的Fe2O3和TiO2為晶核劑,以燒結(jié)法制備出了主晶相為透輝石(Ca(Mg,Fe)Si2O6),副晶相為硅灰石(Ca3(Si3O9)),晶粒尺寸為0.2-0.4μm的鋼渣微晶玻璃,大幅度的提高了這兩種廢物的生產(chǎn)利用率。采用DTA、XRD、SEM等分析手段研究了基礎(chǔ)玻璃的析晶行為和微觀結(jié)構(gòu),確定了最優(yōu)的熱處理制度。本實(shí)驗(yàn)所采用的鋼渣和粉煤灰綜合摻量達(dá)到63%。研究結(jié)果表明:其微晶制備的最優(yōu)的熱處理制度為:核化溫度870℃,核化時(shí)間2h,晶化溫度1150℃,晶化時(shí)間2h。獲得的微晶玻璃的性能參數(shù)為:耐酸性0.14%、耐堿性0.015%、密度2.84g/cm3、抗壓強(qiáng)度107.27MPa、抗折強(qiáng)度74.89MPa、顯微硬度756.97kgf/mm2。探討了Fe2+對(duì)整個(gè)微晶玻璃析晶過(guò)程、微觀結(jié)構(gòu)和物相結(jié)構(gòu)的影響。當(dāng)Fe2+含量在3.11%以下時(shí),微晶玻璃的主晶相為鈣鋁黃長(zhǎng)石;當(dāng)Fe2+含量增加到5.46%時(shí),微晶玻璃的主晶相由鈣鋁黃長(zhǎng)石變?yōu)殁}鎂黃長(zhǎng)石;當(dāng)Fe2+含量增加到7.80%及以上時(shí),微晶玻璃的主晶相由鈣鎂黃長(zhǎng)石轉(zhuǎn)變?yōu)橥篙x石。
[Abstract]:The converter slag of a steel plant in Guizhou province and the fly ash of a power plant in China were used as nucleating agents, and the Fe2O3 and TiO2 contained in converter slag and fly ash were used as nucleating agents without adding other nucleating agents. Steel slag glass-ceramics with the main crystal phase of diopside (diopside), the main crystalline phase of diopside, the apicrystalline phase of wollastonite and the grain size of 0.2-0.4 渭 m have been prepared by sintering method. The utilization ratio of these two kinds of wastes has been greatly improved. The crystallization behavior and microstructure of the base glass were studied by means of DTA-XRDX SEM and the optimum heat treatment system was determined. The content of steel slag and fly ash in this experiment is 63%. The results show that the optimum heat treatment conditions are as follows: nucleation temperature 870 鈩，

本文編號(hào)：1915134