Direct coal liquefaction residue (DCLR) as an auxiliary feed material with lignite to prepare coal water slurry (CWS), which is then used as combustion fuels, enables recycle resources of DCLR and diminishes its impact on the surrounding environment. This paper aims to study the slurryability, combustion characteristics, and typical pollutant emissions of the lignite water slurry (LWS), DCLR water slurry (DCLRWS), and lignite-DCLR water slurry (L-DWS). Results showed that the DCLR and lignite were complementary in physicochemical properties for preparing the L-DWSs. The maximum solid concentration (ω_max) of the DCLR was 73.19 wt% with poor static stability, whereas that of the LWS was 41.70 wt% with high pseudoplasticity. By contrast, the ω_max of the L-DWS-5 prepared from the lignite and DCLR at mass ratio of 5:5 was 53.91 wt% with lower pseudoplasticity and static stability. Meanwhile, combustion experiments confirmed that the introduced DCLR was effective in improving the ignition, burnout, and comprehensive combustion performance of the L-DWS. The Q_{net, p} of the slurrying samples increased from 6.70 MJ/Kg for the LWS to 14.41 MJ/Kg for the L-DWS-5. And the addition of the DCLR exhibited slight influences on the emissions of NOx and SO₂, but significantly increased HCN and other organic compounds such as C_nH_m, CO, and NH₃ emissions. Furthermore, except for Pb and Zn, more than 85% Cr, Cu, and Ni were intercepted in solid residues.

直接煤液化残渣（DCLR）作为辅助原料与褐煤制备水煤浆（CWS），然后用作燃烧燃料，使DCLR的资源循环利用并减少其对周围环境的影响。本文旨在研究褐煤水浆（LWS）、DCLR水浆（DCLRWS）和褐煤-DCLR水浆（L-DWS）的成浆性、燃烧特性和典型污染物排放。结果表明，DCLR和褐煤在制备L-DWSs的物理化学性质上具有互补性。_{DCLR的最大}固体浓度（ωmax）为73.19 wt%，静态稳定性差，而LWS的最大固体浓度为41.70 wt%，假塑性高。相比之下，ω _max褐煤与 DCLR 按 5:5 的质量比制备的 L-DWS-5 的质量比为 53.91 wt%，具有较低的假塑性和静态稳定性。同时，燃烧实验证实，引入的DCLR能有效改善L-DWS的点火、燃尽和综合燃烧性能。浆料样品的 Q _{net, p}从 LWS 的 6.70 MJ/Kg 增加到 L-DWS-5 的 14.41 MJ/Kg。而DCLR的添加对NOx和SO ₂的排放量影响不大，但显着增加了HCN和其他有机化合物如C _n H _m、CO和NH ₃的排放量。此外，除 Pb 和 Zn 外，超过 85% 的 Cr、Cu 和 Ni 被截留在固体残渣中。