《煤矸石制备烧结普通砖的实验研究》-毕业论文.doc

PAGE 精品 精品 煤矸石制备烧结普通砖的实验研究 摘 要 煤矸石是目前我国排放量最大的工业固体废弃物之一，它不仅侵占土地，还污染环境，破坏生态平衡。但煤矸石本身有一定的热量，可以满足自身烧成的需要，故利用煤矸石做制砖原料是变废为宝之举。本课题研究以煤矸石为主要原料制备烧结普通砖的可行性，并确定煤矸石制备烧结普通砖的最佳工艺参数。 本课题分别研究了颗粒级配、烧成温度和保温时间对煤矸石烧结普通砖性能的影响。通过多次实验确定当粒径为0.45mm—0.80mm的颗粒占30%，0.30mm—0.45mm的颗粒占15%，0.30mm以下的颗粒占55%时，粗、中、细颗粒间符合最紧密堆积，当烧成温度为1100℃，保温2h时，制品的抗折强度和抗压强度达到一个最佳值，分别为11.32Mpa和63.21Mpa。 关键词：煤矸石 烧结砖 颗粒级配 烧成温度 保温时间 性能  Study on the preparation of agglomerating bricks by coal gangue Abstract Coal Gangue is one of the industrial solid wastes in our country.It not only invades and occupies the land, but also pollutes the environment, destroys the ecological balance. As the coal gangue has calorific value it can meet the needs of their own firing, so if we can make use of these coal gangue to manufacture agglomerating brick it is an effective way of turning waste into wealth. This study is based coal gangue as the main material produced feasibility of agglomerating brick, then put forward the optimal process parameters and demands. The paper discuss the effect factors for the process from the grain size distribution, firing temperature and soaking time on the properties of bricks that made by coal gangue. Many experiments shows that when the particle size of 0.45mm-0.80mm particles accounted for 30%, 0.30mm-0.45mm particles accounted for 15%, 0.30mm particles less than 55%, the coarse, medium and fine particles can meet the most close packing.When the firing temperature is 1100 ℃, 2h insulation, the bending strength and compressive strength of the products reached an optimum value, respectively 11.32Mpa and 63.21Mpa. Key words: coal gangue；agglomerating bricks；particle distribution；firing temperature; soaking time; properties 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc295163835 1 引言 PAGEREF _Toc295163835 \h 1 HYPERLINK \l _Toc295163836 1.1煤矸石概述 PAGEREF _Toc295163836 \h 1 HYPERLINK \l _Toc295163837 1.1.1煤矸石的来源及化学组成 PAGEREF _Toc295163837 \h 1 HYPERLINK \l _Toc295163838 1.1.2煤矸石的