造纸黑液作为赤铁矿反浮选药剂的研究

利用黑液液含有胶体SiO2及有较高PH值的特点，将黑液作为赤铁矿反浮选药剂，纯矿物试验明，适量黑液对石英抑制较强，用H2SO4和某种氧化剂将黑液处理后并按30％的体积比加入矿浆中，可得品位56．00％， 回收率83．36％的赤铁矿粗矿。精选中加入10％的黑液，可得品位58．90％，回收率80．50％的赤铁矿精矿。

Black Liquor as Reagents of Hematite Reverse Flotation

Black liquor,containing colloid S iO 2 and being higher alkalinity,can be u sed as reagents of hematite reverse flotation.Purity minerals flotation tests showed that black liquor,when its ratio in the pulp was su itable,depressed hematite strongly and quartz poorly.A hematite rough concent rate with a grade 56.00%and recovery83.36%was obtained by adding 30%bla ck liquor,which was treated with H 2 SO 4 ,into the pulp.The concentrate was grade 58.90%and recovery 80.50%in an open -circuit test in which clea ners 10%black liquor was used.