CAJ | 학술논문

为了避免常见Al2 O3-CaO-MgO轻质浇注料使用重基质造成的与轻质骨料性能差异较大的问题，以微孔轻质CA6-MA骨料（8～5、5～3、3～1 mm）、w（Al2O3）＝99．5％的速烧刚玉（≤0．045、≤0．074 mm）、α-Al2O3微粉、Al（OH）3（≤0．045 mm）等为原料，研究了在 Al2O3-CaO-MgO 轻质浇注料的基质中引入不同量的Al（OH）3（其质量分数分别为0、1％、3％和5％）对其烧后性能的影响。结果表明：随Al（OH）3加入量增加， Al2 O3-CaO-MgO轻质浇注料的加水量增加，体积密度略有降低，常温耐压强度呈下降趋势，对试样的常温抗折强度和高温抗折强度（1400℃1 h ）影响不大，热导率减小；经1600℃3 h 热处理后，加入质量分数3％Al（OH）3的浇注料基质中由大量交叉排列的六方片状六铝酸钙转变为多层叠加状。综合考虑Al2 O3-CaO-MgO轻质浇注料的各项性能，Al（OH）3的合适加入质量分数为3％。
위료피면상견Al2 O3-CaO-MgO경질요주료사용중기질조성적여경질골료성능차이교대적문제，이미공경질CA6-MA골료（8～5、5～3、3～1 mm）、w（Al2O3）＝99．5％적속소강옥（≤0．045、≤0．074 mm）、α-Al2O3미분、Al（OH）3（≤0．045 mm）등위원료，연구료재 Al2O3-CaO-MgO 경질요주료적기질중인입불동량적Al（OH）3（기질량분수분별위0、1％、3％화5％）대기소후성능적영향。결과표명：수Al（OH）3가입량증가， Al2 O3-CaO-MgO경질요주료적가수량증가，체적밀도략유강저，상온내압강도정하강추세，대시양적상온항절강도화고온항절강도（1400℃1 h ）영향불대，열도솔감소；경1600℃3 h 열처리후，가입질량분수3％Al（OH）3적요주료기질중유대량교차배렬적륙방편상륙려산개전변위다층첩가상。종합고필Al2 O3-CaO-MgO경질요주료적각항성능，Al（OH）3적합괄가입질량분수위3％。
In order to avoid the obvious difference between heavy-weight matrix and light-weight aggregate in common Al2 O3-CaO-MgO light-weight castables,effects of aluminum hydroxide additions (0,1%,3%and 5%,in mass,the same hereinafter)in Al2 O3-CaO-MgO light-weight castables matrix on the properties after firing were studied using microporous light-weight CA6-MA aggregates (8-5,5 -3,3-1 mm),rapid calcining corundum (99.5% Al2O3;≤0.045 and ≤0.074 mm),α-Al2O3 micropowder,and aluminum hy-droxide (≤0.045 mm)as main starting materials.The results show that with aluminum hydroxide addition increasing,water amount increases,bulk density and cold crushing strength decline,cold modulus of rup-ture and hot modulus of rupture (1 400 ℃ 1 h)change slightly,and thermal conductivity of Al2O3-CaO-MgO light-weight castables declines;after calcining at 1 600 ℃for 3 h,a lot of hexagonal flake interlocking calcium hexaluminate converts into multi-layer overlaying arrangement in castables matrix with 3% alumi-num hydroxide.Considering all the properties of Al2 O3-CaO-MgO light-weight castables,the suitable addi-tion of aluminum hydroxide is 3%.