对新疆某高硫铅锌矿进行了低碱度条件下的浮选分离试验研究.试验结果表明,在少量石灰创造低碱度的环境中采用JS和少量硫酸锌和亚硫酸钠组合可以较好地抑制黄铁矿和闪锌矿.闭路试验可获得铅精矿含铅50.11%,铅回收率81.22%%,含锌3.92%;锌精矿含锌49.82%,锌回收率82.10%,含铅0.50%.实现了铅硫的低碱度低成本高效分离.

新疆某高硫铁矿原矿铁品位48.4%,硫品位为1.68%.铁主要赋存在磁铁矿、硫铁矿中.硫主要以黄铁矿、磁黄铁矿的形式存在,为合理开发利用该矿石,采用硫酸法活化反浮选获得硫精矿,浮选尾矿通过磁选富集得到铁精矿,最终得到的硫精矿含硫39.8%,回收率90.01%,铁精矿铁品位为70.31%,回收率86.13%,含硫降至0.071%.

某矿山为含铜磁铁矿沉积-热液叠加型矿床,主要有用矿物为黄铜矿和磁铁矿.根据矿石性质,经过浮选试验和磁选试验可知:通过一段粗选两段精选两段扫选的浮选工艺流程可获得品位20.77％、回收率为86.1％的铜精矿,浮选尾矿经一段粗选一段精选的磁选,可获得品位为68.54％、回收率为98.9％得磁铁矿.

对新疆某难选铅铜硫化矿进行了工艺矿物学和浮选工艺流程的研究,为建设选矿厂提供合理的工艺流程条件.通过试验确定了合理的工艺流程和药剂制度,采用混合浮选工艺,获得的试验指标为铅精矿含铅49.33％,铜2.13％,铅回收率72.2％,铜回收率53.8％.

针对某锂辉石进行了选矿工艺试验研究,根据矿石性质,经过浮选法对含Li2O 1.36％的原矿,可获得Li2O品位5.69％,回收率为80.3％的锂精矿.将锂精矿进行磁选和重选可对该矿石中的钽铌矿物进行富集实现有用矿物的综合回收.

针对湖南某钨锡选矿厂中钨和锡回收困难的问题，对该矿物进行工艺矿物学研究，发现矿石嵌布粒度细，难以单体解离。因此采用浮选和弱磁选工艺脱除含硫铁矿，脱硫尾矿再用强磁选工艺分离得到磁性矿物和非磁性矿物，磁性矿物继续通过“浮-磁-重”联合工艺得到钨精矿1，非磁性矿物通过脱泥和“重-浮”联合工艺得到钨精矿2及锡精矿。获得了含锡50.44%，锡回收率为47.29%的锡精矿；含钨41.83%，钨回收率25.10%的钨精矿。

根据新疆某铜硫矿物的矿石特性，在工艺矿物学研究和小型试验的基础上，通过采用新型捕收剂ZK-1对铜硫矿物进行了选别，得到含铜21.75%，铜回收率为87.4%的铜精矿，获得了较好的选矿工艺指标。

A certain lead-zinc ore in Qinghai belongs to low-grade refractory lead-zinc-ore because the content of lead and zinc are very low.The lead minerals associate to zinc and sulfur minerals closely.According to the characteristic of the big floatability difference between lead minerals and zinc sulfur minerals,the selective flotation flow-sheet is adopted.Laboratory test adopts diethyl dithiocarbamate as the collector of lead,with lime,sodium sulfite and zinc sulfate as the depressor of zinc sulfur minerals in lead roughing,using copper sulfate as activator of marmatite after adjusting the pH value of the dehydration pulp of lead tailing to 10.5.The results show that under the condition of raw ore with a lead and zinc grade 2.27 % and 1.17 % respectively,the technical indicators of lead concentrate with lead grade 50.87 % and lead recovery 78.33 % and zinc concentrate with zinc grade 45.30 % and zinc recovery 70.47 % can be obtained from the closed-circuit test.

For a potassium feldspar ore in Fujian,first using high gradient magnetic separator for removal of iron,then under the acidic conditions(pH=2～3),obtained feldspar concentrates containing K2O 9.75% and Na2O 4.36% afte feldspar-quartz flotation separation.In order to further improve the quality of potassium feldspar,using sodium chloride as inhibitors,realize the potassium feldspar and albite separation,eventually obtaining potassium feldspar concentrates including K2O 13.01%,Na2O 2.18% and 0.17%Fe2O3.

In order to provide a basis for the development and utilization of a low-grade K-feldspar ore in Fujian,,the beneficiation tests on this ore was carried out.The results showed that with sulfuric acid as modifier,dodecylamine+diesel as collector of floating mica,hydrofluoric acid and dodecylamine as activator and collector of floating K-feldspar separately,K-feldspar concentrate with K2O content of 9.84% and recovery of 82.82% and quartz concentrate with SiO2 content of 98.80% and recovery of 26.07% were obtained through the flow-sheet of high intensity magnetic separation for iron removal-desliming-flotation for mica removal-flotation separation of K-feldspar and quartz.K-feldspar concentrate can meet the requirement of A-level K-feldspar raw materials for the ceramic industry,and quartz concentrates comes in line with the requirements of low-grade quartz sand for the glass industry.