多孔硅酸钙加填轻型纸的脱墨性能研究

Study on the Deinking Performance of Porous Calcium Silicate-filled Munken Paper

关键词:  多孔硅酸钙  轻型纸  脱墨性能  油墨去除率  高松厚度

Key Words:porous calcium silicate  munken paper  deinking performance  ink removal rate  high bulk

摘要:本研究对粉煤灰基多孔硅酸钙填料的物理性能进行了分析，并对多孔硅酸钙加填轻型纸的脱墨性能进行了研究。结果表明，多孔硅酸钙填料密度小、比表面积大、孔隙率高，呈现“蜂窝状”结构，且白度高，磨耗低；多孔硅酸钙加填轻型纸的脱墨性能好，脱墨浆白度增值高，经浮选脱墨后其油墨去除率、残余油墨浓度和脱墨浆ISO白度增值分别为84.3%、159.9 mg/kg和17.1%，明显优于轻质碳酸钙（轻钙）加填轻型纸（分别为68.9%、230.2 mg/kg和10.4%），但其浮选脱墨浆渣率略高于轻钙填料，两者分别为3.44%、2.32%。与轻钙加填轻型纸的脱墨浆相比，多孔硅酸钙加填轻型纸的脱墨浆纸张松厚度好、裂断长和耐折度高，有助于生产高松厚度、高强度纸张。

Abstract:In this study， physical properties of porous calcium silicate were analyzed， and the deinking performance of porous calcium silicate-filled munken paper was studied. The results showed that the porous calcium silicate with a honeycomb structrue was of low density， large specific surface area， high porosity and brightness， and low abrasion； the porous calcium silicate-filled munken paper showed good deinking performance with high pulp brightness increase， and ink removal rate， residual ink concentration and deinked pulp brightness increase after flotation deinking were 84.3%， 159.9 mg/kg and 17.1%， respectively， significantly higher than those of （PCC） counterpart （corresponding to 68.9%， 230.2 mg/kg and 10.4%， respectively）； however， the deinked pulp reject rate of the porous calcium silicate filled munken paper was slightly higher than that of the PCC filled munken paper， which were 3.44% and 2.32%， respectively； the handsheet analysis showed that the deinked pulp of porous calcium silicate-filled munken paper had higher bulk， breaking length and folding endurance strength， which was beneficial to producing high-bulk and high-strength paper.