寒天中加入添加剂后对磷酸盐耐火材料膨胀性影响的比较研究

发布时间：2018-03-24 03:36

本文选题：寒天　切入点：磷酸盐　出处：《大连医科大学》2014年硕士论文

【摘要】：目的:通过对比实验探究微波法、寒天机法和水浴法这三种不同的方法在加热寒天时,向每次使用后的寒天中添加一定量的新寒天和水至初始重量后反复加热使用,观察其对磷酸盐耐火材料模型膨胀性的影响及三种加热方法之间的差异。验证在使用后的寒天中加入一定量的新寒天和水来延长其使用时间的可行性。从而找到既能减少成本又能有效保障修复体制作质量的方法,为加工厂合理利用旧寒天提供理论依据。方法:实验组选择6个10ml标准玻璃注射器内芯分成A、B、C三组,每组2个注射器内芯。将三组注射器内芯分别等距垂直置于三个塑料型盒中,注射器内芯头部与型盒底部保持接触,固定内芯,形成磷酸盐样品标准模具。取三组等量的新寒天分别用微波法、寒天机和水浴法三种方法加热熔化后,灌入三个型盒中,使三组注射器内芯垂直向下埋入,待寒天冷却凝固形成寒天印模后脱模。按厂家提供的水粉比调和磷酸盐耐火材料并灌入寒天印模中,待磷酸盐耐火材料凝固1小时后取出。将所得磷酸盐耐火材料样本分别放入石膏测量模具中,并用千分尺进行磷酸盐耐火材料样本直径的测量。寒天第一次加热获得磷酸盐耐火材料样本后,收集剩余寒天并称重,得到寒天的失水重量,将新寒天和水按重量之比1:8混合加入第一次加热后的剩余寒天中,使之恢复初始重量,并进行第二次加热和灌注磷酸盐耐火材料模型。每次灌注磷酸盐耐火材料模型后均按照上述方法向剩余寒天中加入新寒天和水的混合物使之恢复初始重量,再进行下一次的加热和磷酸盐耐火材料模型的灌注。实验重复20次。对比每个加热组中20次磷酸盐耐火材料样本的凝固和吸水膨胀以及三种加热组之间磷酸盐耐火材料样本的凝固和吸水膨胀,用SPSS19.0软件对所测量的结果进行方差分析和线性回归分析。对照组使用和实验组同等重量的寒天分别进行微波法、寒天机法,水浴法加热。在灌注寒天印模、形成磷酸盐耐火材料样本后,收集剩余寒天直接进行第二次加热。实验反复进行20次,每个加热组均获得20组磷酸盐耐火材料样本。结果:实验组中,微波法、寒天机法、水浴法得到的磷酸盐耐火材料样本膨胀率回归曲线的斜率分别为-0.000235、-0.000237、-0.000209。对照组得到的磷酸盐耐火材料样本膨胀率回归曲线的斜率分别为-0.000689、-0.000502、-0.000494。同时,实验组中三种加热方法所得磷酸盐耐火材料样本膨胀率P0.05,无统计学差异。对此结果进一步进行S-N-K两两比较后,结果表明,三种加热方法之间所得的磷酸盐耐火材料样本膨胀率均无统计学差异。结论:通过反复向加热后的寒天中加入一定量的新寒天和水后,可以延长寒天的使用次数,且微波法、寒天熔化机法和水浴法加热所得磷酸盐耐火材料样本膨胀率之间无明显差异。
[Abstract]:Objective: to explore three different methods, microwave method, cold sky machine method and water bath method, to add a certain amount of new cold days and water to the initial weight to heat the cold days after each use. The effects on the expansibility of phosphate refractories model and the differences between the three heating methods were observed. The feasibility of adding a certain amount of new cold days and water to prolong the use time of phosphate refractories was verified. Methods that can both reduce costs and effectively guarantee the quality of the repair system, Methods: six 10ml standard glass syringe cores were divided into three groups. Each group of 2 injector cores. Three groups of syringe inner core is placed in three plastic box, the inner core head of the syringe keeps in contact with the bottom of the mould box, fixed the inner core, Three equal groups of new cold days were heated and melted by microwave method, cold weather machine and water bath method, then poured into the three type boxes, so that the inner core of the three groups of syringes was buried vertically down. When the cold days are cooled and solidified to form the cold days impression, the mold is released. According to the water powder ratio provided by the manufacturer, the phosphate refractories are mixed and poured into the cold days impression. Take out phosphate refractories after solidification for 1 hour. Put the samples of phosphate refractories in gypsum measuring mould, The diameter of phosphate refractories was measured with micrometers. After the first heating of phosphate refractories, the residual cold days were collected and weighed, and the lost water weight of cold days was obtained. Add the new cold days and water to the remaining cold days after the first heating at 1:8 to restore the initial weight. After the second heating and pouring of phosphate refractory model, the mixture of new cold days and water was added to the remaining cold days in accordance with the above method to restore the initial weight. Next heating and perfusion of phosphate refractories model. Experiment repeated 20 times. Comparison of solidification and water absorption expansion of 20 phosphate refractories samples per heating group and phosphate resistance between the three heating groups. Solidification and water absorption expansion of fire material samples, SPSS19.0 software was used to analyze the variance and linear regression analysis of the measured results. The control group and the experimental group were treated with microwave method, cold weather machine method, water bath method, respectively. After the phosphate refractory samples were formed, the residual cold days were collected and directly heated for the second time. The experiment was carried out repeatedly for 20 times, and 20 groups of phosphate refractories were obtained in each heating group. Results: in the experimental group, microwave method, cold weather method, The slope of expansion regression curve of phosphate refractories obtained by water bath method is -0.000235- 0.000237- 0.000209.The slope of the regression curve of the sample expansion rate of phosphate refractories obtained from the control group is -0.000689- 0.000502- 0.000494. at the same time, the slope of the regression curve is -0.000235- 0.000237- 0.000209.The slope of the regression curve is -0.000689- 0.000502ng-0.000494. The expansion rate of phosphate refractories obtained by three heating methods in the experimental group was not significantly different (P 0.05). After further comparison of the results with S-N-K, the results showed that, The expansion rate of phosphate refractories obtained from the three heating methods has no statistical difference. Conclusion: by adding a certain amount of new cold days and water to the cold days after heating repeatedly, the number of times of use of cold days can be prolonged, and the microwave method can be used. There was no significant difference between the expansion rate of phosphate refractories heated by cold melting machine method and water bath method.
【学位授予单位】：大连医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.1

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