关键词: 豆子沟铁矿石, 工艺矿物学, 嵌布特征

Abstract: The iron grade of iron ore from Douzigou，Eastern Hebei，is 35.80%.Iron mainly exists in form of magnetite，followed by hematite and iron carbonate.Gangue minerals are mainly quartz，hornblende and pyroxene.Process mineralogy characteristics of the ore were carried out，to provide technological basis for the development of the ore.The results showed that main mineral structure is hypidiomorphic-allotriomorphic structure，followed by euhedral-granular structure，crush structure and metasomatic relict structure.While the ore textures is mainly streaky and banded texture，followed by gneissic texture.Magnetite mainly disseminated among gangue minerals，like quartz，in form of hypidiomorphic-allotriomorphic structure，few octahedral or cube was hosted in gangue minerals.The granule of the magnetite in ore is so tiny that 64.01% is distributed in 0.02~0.16 mm，12.59% in -0.02 mm.Thus the magnetite with smaller particle size needs fineness grinding to be liberated.It is necessary to adopt the process of stage-grinding and stage separation to prevente argillization on beneficiation indexes caused by pulverizeng impact.

Key words: Douzigou iron ore, Process mineralogy, Dissemination characteristics