【作者】 周婷婷；

【导师】 任瑞晨；

【作者基本信息】 辽宁工程技术大学 ， 矿物加工工程， 2008， 硕士

【摘要】 膨润土是一种重要的非金属矿物,在很多工业领域中,被广泛应用。我国膨润土资源十分丰富,但我国利用其生产的主要产品仍处在初级加工阶段。膨润土活化、联产白炭黑不仅可以生产高附加值产品,而且可以满足高档产品日益增长的需求,进而高效利用膨润土资源。本论文以辽西某膨润土为原料,深入研究活性白土制备机理、制定较佳的工艺流程,试验研究提纯、活化、制备白炭黑过程的各项工艺技术参数,制得了高效活性白土、白炭黑,同时循环利用废酸,确定最佳工艺参数。试验表明:膨润土原矿经过钠化、分散提纯后,蒙脱石含量由70.00 %提高至84.67 %。通过单因素探索性试验和正交试验确定了湿法活化制备活性白土的最佳工艺条件为:酸土比20 %、活化时间4 h、活化温度90℃、液固比4:1,性能测试结果为脱色率99.75 %、活性度223.1 mmol/100g、游离酸0.13 %,所测指标优于HG/T2569-94行业标准。试验研究非金属矿离解法制备白炭黑,通过单因素试验确定了最佳工艺条件:酸土比66 %、酸溶时间3 h、酸溶温度100℃、酸溶液固比4:1、碱土比为17 %、碱溶时间3 h、碱溶温度100℃、碱溶液固比4:1、电解质加入量为1.5 %、无水乙醇加入量为10 %、中和反应温度80℃、pH=8、陈化时间30 min、陈化温度80℃、醇洗置换。性能测试结果为邻苯二甲酸二丁酯吸收值2.05 ml/g、水悬浮液pH为6.8、加热减量4.0 %,SiO2含量90.94 %,所测指标均达到HG/T3061-1999行业标准。基于“循环利用活性白土和白炭黑的废酸液,降低酸耗,节约水资源”的工艺技术试验研究,制得了不同质量的活性白土,性能测试结果分别为脱色率97.37 %、活性度200.7 mmol/100g;脱色率93.65 %、活性度188.4 mmol/100g,所测指标都达到了HG/T2569-94行业标准,此技术的应用具有良好的社会效益、经济效益和环境效益。更多还原

【Abstract】 Bentonite is an important non-metallic mineral,it is widely applied to many industrial fields. In our country,bentonite resource is quite abundant, but its master production is still in primary phase. Bentonite is activated and used for producing white carbon at the same time, which can not only produce goods with high added value but also meet the growing demand for the upper-end products, sequentially, utilize bentonite resource high-efficiently.Bentonite in western Liaoning Province is chosen as raw material, this paper lucubrates the mechanism of preparation, draws up the better technological process, studies every technical parameter in the processes which include purification, activation and preparation of white carbon, obtains high-efficient activated clay and white carbon, at the same time, recycles acid pickle and confirms the optimal technical parameters.After the bentonite is purified by means of sodium modification and dispersion, the experiment shows that the montmorillonite content is rising from 70.00% to 84.67%.By means of single factor exploratory research and orthogonal test, the experiment confirms the optimal technological conditions in producing activated clay by wet method. Acid-clay ratio is 20%, activation time is 4h, activation temperature is 90℃, solid-liquid ratio is 4:1. According to the conditions, the production is tested. The performance testing results are as following. The decolouring ratio is 99.75%, the activity is 223.1mmol/100g, the free acid is 0.13%. These indicators precede the requests of the HG/T2569-94 industry standard.The experiment studies preparation of white carbon by means of non-metallic minerals separation method. The optimal technological conditions which base on the single factor method are as following. Acid-clay ratio is 66%, acid dissolution time is 3h, acid dissolution temperature is 100℃, acid dissolution solid-liquid ratio is 4:1, alkali-clay ratio is 17%, alkali dissolution time is 3h, alkali dissolution temperature is 100℃, alkali dissolution solid-liquid ratio is 4:1, proportion of adding electrolyte is 1.5%, proportion of adding absolute ethyl alcohol is 10%, neutralization temperature is 80℃, pH=8, aging time is 30 min, aging temperature is 80℃, absolute ethyl alcohol is adopted to rinse the products in permutation. According to the conditions, the production is tested. The performance testing results are as following. The absorption value of Dibutyl Phthalate is 2.05ml/g, pH of the suspending liquid is 6.8, the heating loss is 4.0%. SiO2 content reaches 90.94%. These indicators are all in keeping with the requests of the HG/T3061-1999 industry standard.Being based on the technical experimental research of recycling acid pickle from preparation of activated clay and white carbon, reducing acid dosage and saving water resource, the activated clay of different quality is obtained in the experiment. The production performance testing results are as following. The decolouring ratio is 97.37% and 93.65%, respectively, the activity is 200.7mmol/100g and 188.4mmol/100g. These indicators are all in keeping with the requests of the HG/T2569-94 industry standard. The application of technology will make favorable social, economic and environmental benefit.更多还原