本文關(guān)鍵詞： 管道輸送 膏體充填 泵壓輸送特性 環(huán)管試驗(yàn) 減阻技術(shù)　出處：《礦冶工程》2016年05期 　論文類型：期刊論文

【摘要】：在金川礦山膏體充填系統(tǒng)開展了泵壓管道輸送特性環(huán)管試驗(yàn),針對不添加水泥和膠砂比為1∶4的2種全尾砂膏體進(jìn)行了管道輸送阻力試驗(yàn)。結(jié)果表明,膏體輸送平均流速為1.2 m/s時(shí),質(zhì)量濃度為72.2%,75.8%和78.9%的管輸阻力分別為10,19和33 k Pa/m;膠砂比為1∶4、質(zhì)量濃度為78.9%的膠結(jié)全尾砂膏體管輸阻力為12.5 k Pa/m。針對全尾砂與棒磨砂配比分別為6∶4、5∶5和4∶6的3種混合骨料,開展了膏體管輸阻力試驗(yàn),結(jié)果表明,在平均流速為1.2 m/s、管輸阻力不大于15 k Pa/m的條件下,3種混合骨料膏體可泵送膏體質(zhì)量濃度分別為80%,79%和81%;試驗(yàn)結(jié)果還顯示,質(zhì)量濃度相差1%,管道阻力損失相差50%~100%,可見膏體管輸阻力對濃度變化十分敏感;3種配比的混合骨料膏體塌落度大于15 cm,滿足膏體泵壓輸送要求。膏體減阻試驗(yàn)結(jié)果揭示,添加水泥材料1.5%的YNB型泵送劑,膏體管輸減阻效率可達(dá)到68.6%,相應(yīng)的膏體塌落度增加88%。
[Abstract]:In Jinchuan mine paste filling system, the characteristic loop pipe test of pumping pressure pipeline transportation was carried out, and the pipeline conveying resistance test was carried out for two kinds of total tailings paste without adding cement and cement-sand ratio of 1: 4. The results showed that the experiment was carried out. When the average velocity of plaster transport was 1.2 m / s, the resistance of 72.2% and 78.9% in mass concentration was 1019 and 33kPam, respectively. When the cement sand ratio is 1: 4 and the mass concentration is 78.9%, the pipe transportation resistance of the paste is 12.5k Pa / m. The ratio of the whole tailing sand to the bar grinding sand is 6: 4, respectively. Three kinds of mixed aggregate, 5: 5 and 4: 6, were used to test the resistance of plaster pipe transportation. The results showed that the average velocity of flow was 1.2 m / s and the flow resistance was not more than 15 k Pa/m. The mass concentrations of three kinds of mixed aggregate paste were 80% and 81%, respectively. The test results also show that the mass concentration difference is 1 and the pipeline resistance loss is 50% and 100% respectively. It can be seen that the resistance of the plaster pipe is very sensitive to the change of the concentration. The collapse degree of three kinds of mixed aggregate paste is more than 15 cm, which meets the requirement of paste pump pressure transportation. The result of paste drag reduction test reveals that YNB pump agent with cement material 1.5% is added. The drag reduction efficiency of plaster pipe can reach 68.6%, and the corresponding paste collapse degree increases 88%.
【作者單位】： 北京科技大學(xué)土木與環(huán)境工程學(xué)院;金川集團(tuán)股份有限公司鎳鈷資源綜合利用國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家高技術(shù)研究發(fā)展計(jì)劃(863)(SS2012AA062405) 鎳鈷資源綜合利用國家重點(diǎn)實(shí)驗(yàn)室資助項(xiàng)目(金科礦2015-01)
【分類號】：TD853.34
【正文快照】： 膏體充填法綜合運(yùn)用現(xiàn)代工業(yè)多項(xiàng)高新技術(shù),是現(xiàn)代采礦工業(yè)技術(shù)含量較高的采礦方法。膏體充填料漿具有可使用全尾砂充填料、充填料漿在采場無需脫水、減少井下充填污染與排水費(fèi)用、充填體強(qiáng)度高且水泥耗量小、降低充填成本、充填體接頂率高等優(yōu)點(diǎn),因此膏體充填法是充填法采礦的

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