基于木钠盐与复配水煤浆添加剂制备试验研究

为克服单一添加剂的缺点,提高水煤浆性能,研制了一种基于木质素磺酸钠与亚甲基二萘磺酸钠(NNO)复配的新型水煤浆添加剂,研究了添加剂复配比、添加剂用量、煤粒级配及温度等对水煤浆成浆性能的影响。结果表明,木质素磺酸钠与亚甲基二萘磺酸钠的复配比为1∶2,添加剂用量为0.8%,0.25、0.18、0.12 mm煤粒质量比为1∶2∶3.5时制备的水煤浆具有较好的稳定性及流动性,黏度为2 000 m Pa·s,浆液流动性达B级,且放置1、3 d后,落棒实验均显示一棒落底。水煤浆黏度与温度的自然对数成线性关系,即随着温度的升高,水煤浆黏度下降明显。 In order to improve performance of coal water slurry( CWS),a novel additive for CWS was prepared based on the compound of sodium ligninsulfonate to dispersing agent NNO. The compound proportion of sodium ligninsulfonate and dispersing agent NNO,amount of additive and grading of different particle size were optimized. It was found that the CWS had better stability and liquidity when the ratio of sodium ligninsulfonate to dispersing agent NNO was 1 ∶ 2,the additive amount was 0. 8%,and the proportion of different sizes of coal particles( 0. 25 mm,0. 18 mm,0. 12 mm) was 1 ∶ 2 ∶ 3. 5. After letting set for one day or three days,the stability and liquidity were good. In addition,the effects of temperature on CWS properties were studied. A linear relationship between viscosity of CWS and napierian logarithm of temperature( ln T) was also observed. The viscosity of CWS decreased significantly as the temperature rose