锌铁矾

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

The performance of potassium ammonium jarosite for zinc and indium ions adsorption in the sulfate system is investigated.

考察黄钾铵铁矾对硫酸盐体系中锌、铟的吸附性能。

The preparation of Ni-Zn ferrite from sodium jarosite residue was studied.

摘 要：对黄钠铁矾渣制备复合镍锌铁氧体进行研究。

Aiming at some defects and shortages existing in conventional deferrization processes,such as jarosite,goethite and spray processes,in zinc hydrometallurgy process and using new movements abroad for reference,the study on new technology for removing iron by phosphate has been carried out and satisfactory results have been achieved.

针对湿法炼锌过程中，常规的铁矾法、喷淋法等除铁工艺存在渣量大、周期长、能耗高以及渣二次污染等缺陷和不足，并借鉴国外除铁新动向，进行了磷酸盐除铁法的试验研究，获得了较满意的结果。

DSC-TGA thermal analysis and XRD characterization results demonstrate that Fe is precipitated as Fe3O4 during alkaline decomposition of jarosite. The contents of Fe, In and Zn in decomposition residue are 38.81%, 0.23% and 12.89%, respectively. After selective leaching of In and Zn with dilute HCl solution, the iron concentrates obtained from magnetic separation can be used as raw material for iron smelting.

DSC-TGA热分析和X射线衍射分析结果表明：在NaOH分解过程中，铁矾渣中的铁主要以Fe3O4形式沉淀入渣；分解渣中Fe、In和Zn的含量分别为38.81%、0.23%和12.89%；经稀盐酸选择性浸出铟和锌后，进一步磁选富集可作为炼铁原料。

This paper studies the neutralize agent for zinc hydrometallurgy of jarosite process,analyses advantage and disadvantage of NH_4HCO_3 and calcine as jarosite precipitation neutralize agent,points out if used calcine removed zinc ferrite as neutralize agent,than can cut the cost and reduce zinc content in slag.

研究了湿法炼锌黄钾铁矾渣除铁工艺的中和剂，分析了碳酸氢铵和焙砂作为沉矾中和剂的优缺点，指出用除去铁酸锌的焙砂作中和剂，可降低成本，减少渣含锌。

Jarosite process can obtain high recovery rate of zinc,simultaneously,most of indium remains in the jarosite residues and a little part of indium remains in the high acidities leaching residues.

某锌精矿中铟含量很高，采用黄钾铁矾法处理该高铟锌精矿，在得到较高锌回收率的同时，大部分的铟进入矾渣，少部分进入高浸渣，从矾渣和高浸渣中可回收得到电铟。

The potassium ammonium jarosite with zinc and indium is obtained by Fe3+ ion removal from the iron,zinc and indium coexisted sulphate system by potassium ammonium jarosite process.

在铁、锌、铟共存的硫酸盐体系中采用黄钾铵铁矾法除铁，得到了含锌、铟的黄钾铵铁矾，通过TG/DTA和XRD对黄钾铵铁矾及其热分解产物进行表征。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。