钾长石添加量对陶粒支撑剂性能的影响

doi:10.3969/j.issn.1001-1935.2025.06.004

耐火材料 ›› 2025, Vol. 59 ›› Issue (6): 477-481.DOI: 10.3969/j.issn.1001-1935.2025.06.004

钾长石添加量对陶粒支撑剂性能的影响

王晨喆¹⁾, 靳恩东¹⁾, 丁冬海¹⁾, 肖国庆¹⁾, 朱现峰²⁾, 贾旭辉²⁾

1)西安建筑科技大学材料科学与工程学院陕西西安 710055
2)郑州市润宝耐火材料有限公司河南郑州 452300

收稿日期:2025-03-12 出版日期:2025-12-15 发布日期:2025-12-23
通讯作者: 丁冬海,男,1983年生,博士,教授。E-mail:dingdongxauat@163.com
作者简介:王晨喆:男,2000年生,硕士研究生。E-mail:wcz291457545@163.com
基金资助:
咸阳市重大科技创新专项(L2023-ZDKJ-QCY-SXGG-003)。

Effect of potassium feldspar addition on properties of ceramic proppant

Wang Chenzhe, Jin Endong, Ding Donghai, Xiao Guoqing, Zhu Xianfeng, Jia Xuhui

First author’s address:College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi,China

Received:2025-03-12 Online:2025-12-15 Published:2025-12-23

摘要/Abstract

摘要： 为降低陶粒支撑剂工艺成本和密度,以低品位铝矾土和煤矸石为原料,钾长石为烧结助剂,通过造粒,筛分得到0.425~0.212 mm生坯球体,经110 ℃干燥12 h,再于1 220 ℃保温2 h固相烧结制备了陶粒支撑剂。研究钾长石添加量(质量分数分别为0、5%、10%、15%)对陶粒支撑剂的密度、破碎率、物相组成和显微结构的影响。结果表明:1)随着钾长石添加量的增加,莫来石和刚玉晶体逐渐长大,并互相交错形成网状结构,液相均匀分散并包裹于晶粒外,使试样致密化程度提高。2)在煅烧过程中,钾长石中的K₂O与SiO₂和Al₂O₃形成液相,填充了支撑剂的孔隙,并促进了刚玉和莫来石晶体的生长,从而降低破碎率,提高力学强度。3)当钾长石添加量为10%(w)时,陶粒支撑剂的性能达到最佳,其体积密度为1.41 g·cm^-3,35 MPa闭合压力下破碎率为10.7%,52 MPa闭合压力下破碎率为17.5%。

关键词: 陶粒支撑剂, 钾长石, 莫来石, 破碎率

Abstract: To reduce the process cost and density of ceramic proppant,low-grade bauxite and coal gangue were adopted as raw materials,and potassium feldspar as sintering aid to prepare ceramic proppant.Green spherical pellets with particle sizes of 0.425-0.212 mm were obtained through granulation and sieving,then dried at 110 ℃ for 12 h and solid-phase-sintered at 1 220 ℃ for 2 h.The effects of the potassium feldspar addition (0,5%,10%,and 15%,by mass) on the density,breakage ratio,phase composition,and microstructure of the ceramic proppant were studied.The results show that (1)with the increase of the potassium feldspar addition,mullite and corundum crystals gradually grow and interlace with each other to form a reticulated structure,the liquid phase uniformly disperses and wraps the grains,enhancing the densification of the specimen;(2)during sintering,K₂O in potassium feldspar forms a liquid phase with SiO₂ and Al₂O₃,which fills the pores of the proppant and promotes the growth of corundum and mullite crystals,thereby reducing the breakage ratio and enhancing the mechanical strength;(3)when the potassium feldspar addition is 10%,the properties of the ceramic proppant are the optimal:bulk density of 1.41 g·cm^-3,breakage ratio of 10.7% under a closure pressure of 35 MPa and 17.5% under 52 MPa.

Key words: ceramic proppant, potassium feldspar, mullite, breakage ratio

中图分类号:

TQ174.65

王晨喆, 靳恩东, 丁冬海, 肖国庆, 朱现峰, 贾旭辉. 钾长石添加量对陶粒支撑剂性能的影响[J]. 耐火材料, 2025, 59(6): 477-481.

Wang Chenzhe, Jin Endong, Ding Donghai, Xiao Guoqing, Zhu Xianfeng, Jia Xuhui. Effect of potassium feldspar addition on properties of ceramic proppant[J]. Refractories, 2025, 59(6): 477-481.

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钾长石添加量对陶粒支撑剂性能的影响

Effect of potassium feldspar addition on properties of ceramic proppant

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