排序方式: 共有21条查询结果,搜索用时 15 毫秒
1.
2.
通过表面张力测试、浮选试验和红外光谱的测定,研究了蓝晶石和石英在阴/阳离子混合表面活性剂系统中的浮选行为。研究结果说明了表面活性剂混合物引起的表面张力下降中的协同作用。在浮选系统中,由于这一协同作用的存在,油酸钠/十二胺的添加导致在很宽的pH范围内,浮选回收率提高。文中还分析了在阴/阳离子混合表面活性剂系统中捕收剂的吸附机理。 相似文献
3.
N.J.G. Deutou T. Beda M. Biesuz L. Boubakar U.C. Melo E. Kamseu V.M. Sglavo 《Ceramics International》2018,44(7):7939-7948
Three porous ceramic composites were prepared from readily available raw materials (kaolin, bauxite, feldspar and kyanite). The porous ceramic formulations were sintered at different temperatures ranging from 1200 to 1400°C. The fired specimens were characterized by determining their porosity, bulk density, flexural strength, thermochemical stability, microstructure, water and mercury permeability. Apparent porosity and bulk density in the range 15.57 ± 1.56–42.73 ± 2.28?vol% and 2.23 ± 0.31–2.68 ± 0.41?g?cm?3 respectively were obtained after firing. The flexural strength was in the range of 32.31 ± 2.1–74.88 ± 2.57?MPa and the thermal expansion coefficient of 5–9 × 10?6 C?1. The values of water permeability were 745.4, 641.45 and 525.91?L/m2 h?kPa respectively for PK3, PK4 and PK5. It was found that at high temperature (1400?°C), kyanite particles enhanced the porosity and thermal stability by reducing glass formation and improving crystallization. The presence of the interconnected pores with size between 0.03 and 4.50?µm, the high total volume of pores together with the high flexural strength and thermal stability make the synthesized porous ceramics suitable for high-pressure filtering applications. 相似文献
4.
蓝晶石粒度对刚玉-莫来石材料性能的影响 总被引:1,自引:0,他引:1
以粒度为2~1mm和1~0.5mm的M60莫来石为骨料,以电熔白刚玉粉以及粒度分别为0.8~0.355mm、0.355~0.088mm和<0.088mm的蓝晶石为基质料,以少量二氧化硅微粉和苏州土为结合剂,制成36mm×36mm的试样,在110℃干燥24h后,分别在1200℃、1300℃、1400℃和1500℃保温3h煅烧,然后测定烧后试样的线变化率、显气孔率、体积密度和耐压强度。结果表明:(1)对于在各温度下煅烧后的试样,添加粒度<0.088mm蓝晶石的试样烧后线变化率和显气孔率较添加粒度>0.088mm蓝晶石的小,体积密度和耐压强度较添加粒度>0.088mm蓝晶石的大;(2)当添加粒度<0.088mm的蓝晶石时,随着煅烧温度的升高,试样的烧后线变化率、显气孔率、体积密度和耐压强度变化较小;当添加粒度>0.088mm的蓝晶石时,随着煅烧温度的升高,试样的烧后线变化率和显气孔率迅速增大,体积密度和耐压强度迅速减小。 相似文献
5.
6.
7.
本文针对河北邢台卫鲁地区蓝晶石选矿流程中强磁选后的非磁性产品进行粗选试验研究。在单因素条件试验的基础上,根据Box-Behnken原理,建立了响应值精矿品位及精矿回收率与三个主要影响因素之间的回归方程,探索了最佳的药剂用量。在最佳浮选工艺条件下,即矿浆浓度25%,十二胺盐酸盐用量45 g/t,抑制剂淀粉用量380 g/t的条件下,预测精矿品位为39.46%,精矿回收率为66.53%。验证试验与预测值的相对误差均为0.02%,与模型预测值吻合度较高。证明了二者之间的高度相关性,说明该预测模型在本试验的研究范围内是有效、合理的。 相似文献
8.
蓝晶石对不定形耐火材料膨胀性影响的实验研究 总被引:2,自引:1,他引:1
蓝晶石在高温下发生相变,产生体积膨胀,将其加入到不定型耐火材料中,可改善材料的性能。本文探讨了蓝晶石加入量、焙烧温度与材料线变化率三者之间的关系。结果表明,焙烧温度相同条件下,线变化率随蓝晶石加矿量增加而增加,不同温度下,同一含量的蓝晶石,其材料的线变化率是不对称的“V”字型,并以1000℃最低,此结论对生产有指导作用。 相似文献
9.
Sillimanite, kyanite and andalusite areadvantageous natural refractory raw materials foraluminosilicate refractories to attain improved keyproperties. This paper are divided into two parts tointroduce their resource and technical characteristicin the first part, and their applications in refracto-ries in the second part to be succeeded. In this part,based on authors' knowledge and sources, informa-tion on their reserve, distribution, composition and 相似文献
10.
GCG型强磁选机应用于蓝晶石除铁提纯工业试验研究 总被引:1,自引:0,他引:1
蓝晶石是一种重要的耐火材料,其中的铁杂质会降低蓝晶石制品的耐火度,影响工业使用性能,故对蓝晶石进行除铁是蓝晶石选矿中重要工艺步骤。河北某地蓝晶石生产企业使用GCG15100-4电磁感应辊强磁选机取代原流程中的筒式干选机,最终使蓝晶石精矿中含铁量由原来的1.64%降低到1.02%,提高了蓝晶石精矿质量。 相似文献