The mineralogy of the tin, zinc-containing iron concentrates was researched and a novel utilization technology of pellet pre-oxidation-weak reduction roasting was developed. The results show that, the major iron-carrying mineral is magnetite, the primary tin-bearing mineral is cassiterite, and the zinc-containing minerals are a large quantity of sphalerite and a few of marmatite. 54.78% Sn exists as cassiterite monomers, and 41.31% Sn is embedded in magnetite, existing as the form of tiny granule inclusion of cassiterite, which is proved by the results of Electron Probe. 88.95% Zn exists as sulfide minerals, in addition, granular and irregular sphalerite particles are enwrapped in the magnetite and other minerals. 2 380 N/P of pellet compression strength, 71.86% of Sn volatilization, and 56.28% of Zn volatilization can be obtained under the conditions of roasting temperature 1 075 ℉℃, roasting time 50 min and w(C)/w(Fe) 0.2. The residual Sn and Zn contents in the roasted pellets are both less than 0.08%.%研究含锡锌复杂铁精矿的矿物学特性，并开发含锡锌铁精矿球团预氧化-弱还原焙烧新技术。研究结果表明：铁精矿中的主要载铁矿物为磁铁矿，主要含锡矿物为锡石，主要含锌矿物包括闪锌矿和铁闪锌矿，其中闪锌矿占绝大部分；以单体锡石形式存在的锡占54.78％，而磁铁矿颗粒中的锡占41.31％;磁铁矿中的锡绝大部分为锡石的微细粒包体；88.95％的锌存在于硫化矿中，闪锌矿多以单体粒状或以不规则状与磁铁矿及其他矿物构成连生体；在w(C)/w(Fe)为0.2，焙烧温度为1075℃，时间为50min时，球团矿抗压强度为2 380N/个，Sn和Zn的挥发率分别为71.86％和56.28％，残余Sn和Zn含量均小于0.08％。
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