铝土矿废石制备超低密度陶粒支撑剂的试验研究

Experimental Research on Preparation of Ultra-low-density Ceramsite Proppant with Bauxite Waste Rock

首次以铝土矿废石为主要原料,制备超低密度陶粒支撑剂。主要研究了原料预烧、烧成温度、烧成时间、添加剂用量等对支撑剂性能的影响。试验结果表明:铝土矿废石在750℃预烧2 h,添加剂CMC用量为1.5%,在1 320℃条件下焙烧150 min,制备的20~40目陶粒支撑剂产品体积密度为1.42 g/cm^3,视密度为2.55 g/cm^3,52 MPa的闭合压力下破碎率为5.35%,各项指标均符合国家石油天然气SY/T 5108-2014的行业标准要求。

In this work,the ultra-low-density ceramsite proppant was first prepared using bauxite waste rock as the main raw material.The effects of raw material pre-calcination,sintering temperature,sintering time and additive dosage on proppant performance were studied.The test results showed that under the conditions of the pre-calcination time of 2 hours in 750℃,the additive CMC dosage of 1.5%,calcination time of 150 min in 1 320°C,the bauxite waste rock could be prepared into ceramsite proppant with the size of 0.42 and 0.84 mm,volume density of 1.42 g/cm^3,the apparent density of 2.55 g/cm^3,the breaking rate of 5.35%at the closing pressure of 52 MPa.All indicators were in line with the national oil and gas SY/T 5108-2014 industry standard requirements.