共查询到19条相似文献,搜索用时 146 毫秒
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从型煤粘合剂的选择到腐植酸钠粘合剂的配制、石灰碳化型煤生产工艺流程和设备配置、煤球与煤棒的选择等方面,系统阐述了气化型煤生产的关键技术。 相似文献
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应用腐植酸钠于粉煤成型制气,是湖南省诸多小氮肥厂的一大特色,并取得了较好的经济效益。本文对腐植酸钠的提取及其煤棒的制作(对水、褐煤及碱的用量提出了经验数据或经验公式)作了介绍。该厂在粘结煤棒研制方面,曾于1989年受化工部的委托举办过全国性的学习班。 相似文献
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张得水 《全国造气技术通讯》2010,(4):20-22
0 前言
目前,我厂已有9台Ф2610的煤气炉以腐植酸煤棒为原料制取半水煤气生产合成氨。根据公司规划最终将有13台煤气炉以腐植酸煤棒为原料制气。因此研究探索稳定煤棒制气操作有效途径非常必要。现在虽然对煤棒制气已积累了一定的经验, 相似文献
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无烟煤属高变质程度煤种,其固有的强度大,特别是山西煤,具有可塑性差、热态下不软化等特性,用于制作煤棒(型煤)的难度较大,制成的煤棒如果不能够在数小时内基本干燥,那么连续的大量生产就行不通。对于腐植酸钠免烘干粘结剂来说,能够在保证煤棒的冷、热强度高,灰分增加量少,具备一定的耐潮防水性, 相似文献
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腐植酸钠用作粉焦成型粘结剂的研究 总被引:1,自引:0,他引:1
本文介绍了从风化煤中提取腐植酸钠作粘结剂用于直立炉粉焦成型制气。对不同配比的焦球作了各种强度指标的测定,结果表明当腐植酸钠的配入量达7%时,焦球的各项强度指标均较高。 相似文献
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This study investigated the influence of mineral oxidation on Cu-Pb separation using green reagent sodium humate as depressant for galena. The flotation tests showed that sodium humate had a poor selectivity when it was used alone, especially with high dosage of sodium humate chalcopyrite could be depressed as well. Long time stirring or the addition of oxidants could significantly enhance the depressant ability of NaHA for galena. Zeta potential, electrochemical, and XPS measurement were conducted, indicating that surface oxidation of galena was conducive to the adsorption of sodium humate and then enhanced its inhibitory ability and selectivity. 相似文献
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对原生腐植酸钠和磺化腐植酸钠(由阿列克塞德里斯克矿的褐煤制得)吸附于水溶液-空气相界面时形成的乳浊液的特性以及该腐植酸盐类在水中的溶解性能进行了研究。结果表明,同原生腐植酸钠相比,磺化腐植酸钠在液-液和液-气界面上表现出更明显的表面活性。在浓度变化范围很宽的情况下,磺化腐植酸钠在水溶液中都不形成胶束。 相似文献
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阴离子型添加剂对水煤浆动电势的影响 总被引:4,自引:2,他引:2
选用了变质程度不同的8种煤和三类共9种分子结构不同的阴离子型添加剂,详细考察了添加剂的结构特征对水煤浆动电势的影响规律.研究结果表明,对于线性高分子型阴离子添加剂聚对苯乙烯磺酸钠(PSS),在所考察的相对分子量的范围内(5.34万~33.39万),各煤种的动电势随着分子量的增加而增加(绝对值).对于萘磺酸甲醛缩合物钠盐添加剂(NSF),在萘环上引入甲基和苄基取代基时,动电势均有不同程度的降低.对于木质素和腐植酸盐类添加剂,高磺化度也将导致煤粒动电势的降低. 相似文献
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Antsiferova S. A. Markosyan S. M. Suvorova O. N. 《Theoretical Foundations of Chemical Engineering》2019,53(4):656-660
Theoretical Foundations of Chemical Engineering - The effect of a humate reagent obtained from oxidized brown coal and sodium oleate on the wettability of minerals present in the composition of... 相似文献
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Microencapsulation of Beauveria bassiana (Bb) conidia with sodium humate (SH) was undertaken successfully through spray drying at a high inlet air temperature of 175°C with corresponding outlet air temperature of 86.5 ± 1.3°C using 0.2% SH. The obtained product was a free-flowing, dark-brown powder containing microcapsules of Bb conidia coated with sodium humate (Bb-SH). These microcapsules measured 2.47–3.57 µm and possessed an uneven, fluffy surface. The colony-forming units (CFU) of Bb-SH microcapsules spray-dried at 175°C were 21.54 LCFUg?1, on par with 21.59 LCFUg?1 for Bb conidial powder not subjected to spray drying. Bb-SH microcapsules resulted in a high mortality of 93.0% against six-day-old Helicoverpa armigera larvae within five days after treatment. Bb-SH microcapsules readily dispersed in water, releasing sodium humate from the conidial surface. Germination of conidia was not affected by sodium humate as visualized by scanning electron microscopy of the cuticular surface of treated larvae. Bb-SH microcapsules showed good viability (21.11 LCFUg?1) at the end of six months of storage at room temperature (~30°). Thus, sodium humate is a promising biopolymer for encapsulation of Bb conidia for extended shelf-life at room temperature. 相似文献