配碳量对中低品位磷矿真空碳热还原的影响.docx

本科毕业论文（设计）论文(设计)题目：配碳量对中低品位磷矿真空碳热还原的影响学 院： 材料与冶金学院 专 业： 冶 金 工 程 班 级： 冶金 XX 班 学 号： XXXXXXXXXXXX 学生姓名： XXX 指导教师： XXX 2016 年 6 月 7 日贵州大学本科毕业论文（设计）诚信责任书本人郑重声明：本人所呈交的毕业论文（设计），是在导师的指导下独立进行研究所完成毕业论文（设计）中凡引用他人已经发表或未发表的成果、数据、观点等，均已明确注明出处特此声明论文（设计）作者签名： 日 期： 贵州大学本科毕业论文（设计 ） 第 I 页配碳量对中低品位磷矿真空碳热还原的影响摘要我国的磷矿资源丰富，居世界第二位，中低品位的磷矿所占比重较大，磷矿资源的利用率不高本文通过 FactSage 理论计算与实验的方法对中低品位磷矿真空碳热还原进行研究，主要具体研究了配碳量对中低品位磷矿真空碳热还原的影响。

本文在真空条件下，采用 XRD 物相分析与化学分析方法对不同配碳量在中低品位磷矿碳热还原的过程进行研究，分析不同配碳量对中低品位磷矿还原率的影响以不同配碳量对中低品位磷矿进行真空碳热还原反应，还原出来的磷单质在炉内进行冷凝收集，确定出最合理的配碳量，使得磷的收得率达到最佳，从而提高中低品位磷矿的利用率FactSage 理论计算表明：在保持温度和压强不变的条件下，增加配碳量，还原矿样的失重率不断增加，气相中磷单质的质量随之增加，PO、PO 2 的质量不断减小，使磷的收得率变化呈上升趋势当配碳量达到 14%时，磷的收得率达到 99.91%，配碳量在 14%以后，磷的收得率无明显变化实验结论表明：（1）还原矿样的失重率与磷的收得率随着矿样中配碳量的增加而逐渐增加当配碳量为 16%时，还原矿样的失重率可以达到 36.1%，磷的收得率达到 82.82%2）还原矿样中的磷含量随着矿样中配碳量的增加而逐渐减小在配碳量为 12%至 14%的区间内，磷元素的含量变化更加明显，由 5.76%下降到 4.15%当配碳量为16%时，还原矿样中的磷含量为 2.92%3）由 XRD 图谱物相分析可知：原矿中的 Ca5(PO4)3F，Ca 2(SiO4)和 SiO2 与还原剂焦炭了发生反应，生成 Ca4Si2O7F2，Ca 2SiO4 和 Ca2SiO2F2，Ca 5(PO4)3F 中的磷元素被还原出来。

贵州大学本科毕业论文（设计 ） 第 II 页关键词：中低品位磷矿，FactSage，XRD ，真空处理，碳热还原 贵州大学本科毕业论文（设计 ） 第 III 页Effect of Carbon Ratio on Vacuum Carbon Thermal Reduction of Low-grade Phosphate RockAbstractChina is rich in phosphate resources, ranking second in the world, a large proportion of low-grade phosphate, phosphate rock resource utilization is not high. By FactSage theoretical and experimental methods of low grade phosphate rock vacuum carbon thermal reduction studies, specific studies mainly the carbon content of low grade phosphate rock vacuum carbon thermal reduction impact.In this paper, under vacuum conditions, using XRD phase analysis and chemical analysis of different carbon content in low-grade phosphate rock carbothermic reduction process of research, analyze the impact of different carbon content of low grade phosphate rock reduction ratio. With different carbon content of low grade phosphate rock was subjected to vacuum carbon thermal reduction reaction, reduction of elemental phosphorus out of the condensate collected in the furnace to determine the most reasonable carbon content, so that yield optimal phosphorus, which improve the utilization of low-grade phosphate rock.FactSage Theoretical calculations show that: maintaining constant temperature and pressure conditions, increasing carbon content, reducing ore sample weight loss rate is increasing, the quality of the gas phase elemental phosphorus increased, PO, PO2 quality decreasing, so phosphorus yield variation on the rise. When the carbon content of 14%, the yield reached 99.91% phosphorus, carbon content 14%, the phosphorus yield no significant change. The experimental results showed that:(1) reduction of the weight loss and ore phosphorus yield increases the amount of carbon in ore samples with gradually increased. When the carbon content of 16%, reducing ore 贵州大学本科毕业论文（设计 ） 第 IV 页sample weight loss rate can reach 36.1%, the yield reached 82.82% phosphorus.(2) reducing the phosphorus content in ore samples with increasing carbon content in the ore is gradually reduced. In the carbon content of 12-14% range, phosphorus content in more obvious by 5.76% down to 4.15%. When the carbon content of 16%, reduction in phosphorus ore content of 2.92%.(3) by the XRD pattern phase analysis shows that: ore in Ca5 (PO4) 3F, Ca2 (SiO4) and SiO2 and the reductant coke reacts Ca4Si2O7F2, Ca2SiO4 and Ca2SiO2F2, Ca5 (PO4) 3F in phosphorus It is to restore them.Key words: low-grade phosphate rock， FactSage，XRD，vacuum treatment, carbonthermal reduction 贵州大学本科毕业论文（设计 ） 第 V 页目录摘要 .....................................................................................................................................IAbstract ..............................................................................................................................II 贵州大学本科毕业论文（设计 ） 第 VI 页第一章 绪论 .......................................................................................................................11.1 磷矿资源的概况 ...................................................................................................11.1.1 世界磷矿资源的概况 ..................................................................................11.1.2 我国磷矿资源的概况 .................................................................................21.2 磷矿资源的利用及消费 .......................................................................................51.3 国内外的研究现状和发展趋势 ............................................................................61.3.1 国外研究现状 .............................................................................................61.3.2 国内研究现状 ...............。