CAJ | 학술논문

以水氯镁石和氨气为原料，在不加入任何添加剂的条件下，利用直接沉淀法，制备具有高料浆质量分数的氢氧化镁阻燃剂。研究了搅拌强度、氨镁摩尔比、氨气加入流量、陈化时间、反应温度、氯化镁浓度对制备氢氧化镁粒度分布以及料浆浓度的影响，确定了最佳工艺条件：搅拌强度350 r/min、氨镁摩尔比2∶1、氨气加入流量320 mL/min、陈化时间90 min、反应温度60℃、氯化镁浓度4．30 mol/L。用扫描电子显微镜、X射线衍射仪和激光粒度分布仪表征产品的形貌、结构及粒度。在最佳工艺条件下制备得到的氢氧化镁D501．43μm，D902．40μm，料浆质量分数12．26％，Mg收率69．41％，氢氧化镁纯度99．60％，白度99．34。
이수록미석화안기위원료，재불가입임하첨가제적조건하，이용직접침정법，제비구유고료장질량분수적경양화미조연제。연구료교반강도、안미마이비、안기가입류량、진화시간、반응온도、록화미농도대제비경양화미립도분포이급료장농도적영향，학정료최가공예조건：교반강도350 r/min、안미마이비2∶1、안기가입류량320 mL/min、진화시간90 min、반응온도60℃、록화미농도4．30 mol/L。용소묘전자현미경、X사선연사의화격광립도분포의표정산품적형모、결구급립도。재최가공예조건하제비득도적경양화미D501．43μm，D902．40μm，료장질량분수12．26％，Mg수솔69．41％，경양화미순도99．60％，백도99．34。
Magnesium hydroxide of high mass fraction slurry was directly synthesized without any additives,using bischofite and ammonia as raw materials.Stirring speed,mole ratio of ammonia to magnesium,ammonia gas addition rate,ageing time reaction temperature and magnesium chloride concentration were studied to find their influences to magnesium hydroxide slurry concentration and particle size.The optimum processing conditions were obtained as follows:stirring speed 350 r/min,mole ratio of ammonia to magnesium 2∶1 ,ammonia addition rate 320 mL/min,aging time 90 min,reaction temperature 60 ℃ and magnesium chloride concentration 4.30 mol/L.The effects of characterize product morphologies, structures and size distributions involved were studied through scanning electron microscope,X-ray diffractometer and laser particle analyzer.The magnesium hydroxide obtained under the optimal reaction conditions had D50 of 1 .43 μm,D90 of 2.40 μm,purity of 99.60% and whiteness of 99.34.The reaction yield reached 69.41% with magnesium hydroxide slurry mass fraction of 1 2.26%.