本文選題：黃河淤沙　切入點(diǎn)：配料　出處：《濟(jì)南大學(xué)》2015年碩士論文

【摘要】：結(jié)合水泥廠生產(chǎn)實(shí)際,選用黃河淤沙作為硅質(zhì)原料燒制硅酸鹽水泥熟料,研究了不同率值、不同礦化劑種類及摻量以及不同煅燒溫度下,黃河淤沙配料對(duì)水泥熟料煅燒及性能的影響。研究結(jié)果表明:采用黃河淤沙配料,由于黃河淤沙中Si O2的結(jié)晶程度較高,造成生料的易燒性較差,燒制的熟料中f-CaO含量比砂巖配料的高,初凝時(shí)間及終凝時(shí)間明顯延長,各齡期強(qiáng)度降低;適當(dāng)提高KH值,熟料中f-CaO含量增大,而水泥的凝結(jié)時(shí)間縮短,水泥各齡期的強(qiáng)度提高。適當(dāng)提高SM值,熟料的液相量減少,在一定程度上影響了熟料礦物的形成,造成熟料中f-CaO含量相應(yīng)增大,而水泥的凝結(jié)時(shí)間縮短,水泥的強(qiáng)度總體上有增大的趨勢;當(dāng)SM偏高(如達(dá)3.0)時(shí),液相量偏低,對(duì)水泥后期強(qiáng)度不利。適當(dāng)提高IM值,熟料的液相黏度增大,熟料中f-CaO的含量也出現(xiàn)不同程度的增大,生料的易燒性變差,但熟料中C3A含量增多,水泥強(qiáng)度成上升趨勢;當(dāng)IM達(dá)1.8時(shí),水泥強(qiáng)度增長已不明顯。在配制水泥生料過程中加入適量脫硫石膏作為礦化劑,并且適當(dāng)提高脫硫石膏的加入量,熟料中f-CaO含量逐漸降低,水泥的凝結(jié)時(shí)間逐漸縮短,水泥各齡期的強(qiáng)度逐漸提高;與未加入脫硫石膏的試樣對(duì)比,水泥的各齡期強(qiáng)度大幅提高;當(dāng)外加脫硫石膏帶入的SO3含量為2.0%時(shí),水泥試樣具有較高的早期強(qiáng)度;當(dāng)SO3含量為2.5%時(shí),水泥試樣的后期強(qiáng)度較高。分別在1450℃,1470℃溫度下煅燒水泥熟料。研究發(fā)現(xiàn),煅燒溫度升高,水泥熟料中f-CaO含量降低,熟料中生成的C3S等礦物含量升高,凝結(jié)時(shí)間縮短,水泥試樣各齡期強(qiáng)度逐漸增大。
[Abstract]:Combined with the production practice of cement plant, the Yellow River silt was selected as the siliceous raw material to burn Portland cement clinker, and the different rate value, different mineralizing agent type and amount and different calcination temperature were studied. Influence of Yellow River silt proportioning on the calcination and properties of cement clinker. The results show that the raw material is poor in burnability due to the high crystalline degree of Sio 2 in the Yellow River silt. The content of f-CaO in clinker is higher than that in sand, the initial setting time and final setting time are obviously prolonged, the strength of each age is decreased, the content of f-CaO in clinker is increased and the setting time of cement is shortened with the appropriate increase of KH value. The strength of cement at different ages is improved. When the SM value is raised properly, the liquid content of clinker decreases, which to some extent affects the formation of clinker minerals, resulting in the increase of f-CaO content in clinker and the shortening of setting time of cement. The strength of cement has a tendency to increase generally, when SM is on the high side (e.g. 3.0), the liquid phase content is low, which is disadvantageous to the later strength of cement. When the IM value is raised properly, the liquid phase viscosity of clinker increases, and the content of f-CaO in clinker increases in varying degrees. The burnability of raw material is poor, but the content of C3A in clinker is increasing, and the strength of cement is on the rise. When IM reaches 1.8, the strength of cement has not increased obviously. In the process of preparing raw cement, the suitable amount of desulphurized gypsum is added as mineralizer. By increasing the amount of desulphurized gypsum properly, the content of f-CaO in clinker decreases gradually, the setting time of cement is shortened, and the strength of cement at different ages is gradually increased, which is compared with the sample without desulphurization gypsum. The strength of cement at different ages is greatly increased; when the SO3 content brought in by desulphurization gypsum is 2.0, the cement sample has higher early strength; when the SO3 content is 2.5, The later strength of cement sample is higher. The cement clinker is calcined at 1450 鈩，

本文編號(hào)：1669548