Nsuta菱锰矿在存在和不存在寿命终止高密度聚乙烯的情况下的煅烧行为

K. Nimako, A. Dwumfour, K. Mensah, P. Koshy, J. R. Dankwah
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引用次数: 7

摘要

本研究利用特制的棕榈仁壳燃烧炉,研究了Nsuta红锰矿(MnCO3)在废高密度聚乙烯(HDPE)存在和不存在情况下的煅烧行为。Nsuta红锰矿粉状样品被快速加热30,40,50和60分钟,再加上温度测量,以确定在耐火粘土坩埚中达到的最高温度。使用含有不同HDPE质量(30g, 40g和50g)的三种红锰矿样品混合物在60分钟重复该过程,并加热1小时。对于煅烧过程中的气体分析研究,在LECOTM坩埚中,在水平管式炉中,在1150°C的高纯氩气下,用高密度聚乙烯(HDPE, C/O比= 1.0、1.5和2.0)和高密度聚乙烯(HDPE)快速加热600 s,并使用在线红外气体分析仪连续分析废气中的CH4、CO和CO2。采用配备导热检测器的GC3气相色谱分析仪检测废气中H2的含量。Nsuta红锰矿石由碳酸锰(MnCO3)、二氧化硅(SiO2)、Ca(Mn, Mg)(CO3)2形式的混合过渡金属碳酸盐和Ca0.6Mg1.94Si2O6形式的混合金属硅酸盐组成。煅烧结果显示可见的颜色变化(从灰色到深棕色),以及煅烧前后肿块的显著变化。在不存在和存在聚合物的情况下,坩埚中的测量温度分别为1001°C至1366°C和1361°C至1369°C。XRF分析表明,添加HDPE后,煅烧矿石中Mn含量略有增加。气体分析表明,在加热前将碳酸盐与HDPE混合可以显著减少二氧化碳的排放量。关键词:土地权属保障、登记、空间数据、属性数据
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Calcination Behaviour of Nsuta Rhodochrosite Ore in the Presence and Absence of End-of-Life High Density Polyethylene
This research investigated the calcination behaviour of the Nsuta Rhodochrosite (MnCO3) in the presence and absence of end-of-life high density polyethylene (HDPE) using a custom-made palm kernel shell fired furnace. Samples of pulverised Nsuta rhodochrosite were heated rapidly for 30, 40, 50 and 60 minutes, coupled with temperature measurements to determine the maximum temperature attained in the fireclay crucible. The procedure at 60 min was repeated using three blends of rhodochrosite samples containing different masses of HDPE (30 g, 40 g and 50 g) and heated for an hour. For gas analyses studies during calcination, cylindrical compacts of rhodochrosite ore in a LECOTM crucible were heated rapidly with and without high density polyethylene (HDPE at C/O ratio = 1.0, 1.5, and 2.0) in a horizontal tube furnace for 600 s at 1150 °C under high purity argon gas and the off gas was continuously analysed for CH4, CO and CO2 using an online infrared gas analyser. The content of H2 in the off gas was detected using a GC3 gas chromatographic analyser equipped with a thermal conductivity detector. The Nsuta rhodochrosite ore was found to consist of a mixture of manganese II carbonate (MnCO3), silica (SiO2), mixed transition metal carbonate of the form Ca(Mn, Mg)(CO3)2 and mixed metal silicate of the form Ca0.6Mg1.94Si2O6. Calcination results indicated visible colour changes (from grey to dark brown), along with significant changes in the mass before and after calcination. In the absence and presence of the polymer, measured temperatures in the crucible ranged from 1001 °C to 1366 °C and 1361 °C to 1369 °C, respectively. Analyses by XRF showed marginal increase in the content of Mn in the calcined ore with HDPE addition. Gas analyses indicate that blending the carbonate with HDPE before heating results in significant decrease in the amount of CO2 emitted.   Keywords: Land Tenure Security, Registration, Spatial Data, Attribute Data
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