Ore blending method for blending ferrodolomite into low-magnetism crude iron ore

Abstract

The invention discloses an ore blending method for blending ferrodolomite into low-magnetism crude iron ore. The method specifically comprises the following steps: acquiring data of an iron ore resource to be mined as a plan; setting the level and calcium oxide content target of iron output from the iron ore; building ore blending models of iron ore and ferrodolomite; and outputting the ore blending quantity of ferrodolomite. The method has the advantages that ferrodolomite is reasonably blended into the low-magnetism crude iron core according to the ore-dressing study and the practice result; the reasonable ore blending quantity and the output ore quality are calculated; the ferrodolomite in an own mine can be recovered. Therefore, the resource utilization level can be improved; the production cost of ore mining, ore dressing and sintering can be synchronously decreased; the reasonable ferrodolomite blending quantity and the output ore quality can be calculated, so that the resource utilization efficiency can be improved, and the ore mining cost can be decreased; the service life of a mine can be prolonged, and the waste stone output can be reduced; the ore dressing and sintering processes are stable; the ore dressing ratio can be reduced during ore dressing, and the lime consumption in sintering can be decreased, thus reducing the cost of ore dressing and sintering systems.

Description

technical field [0001] The invention belongs to the technical field of mining and mineral engineering, and in particular relates to an ore blending method for blending iron dolomite into weak magnetic iron raw ore. Background technique [0002] Jingtieshan mine is the main raw material base for steel production in JISCO headquarters. It is divided into two mining areas, Huashugou and Heigou, with Beidahe as the boundary. Huashugou mining area has a production capacity of 5 million tons per year and Heigou mining area has a production capacity of 4.5 million tons per year, the iron ore produced is sent to the Shanxia Concentrator for processing, and about 53% of the lump ore (15-150mm) is produced through magnetization roasting-weak magnetic separation-reverse flotation to produce about 60% of the weak magnetic concentrate; 47 % fine ore (0-15mm) is produced by high-strength magnetic separation to produce high-grade magnetic concentrate with a grade of about 46%; the mixed de...

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Problems solved by technology

[0004] Practice has shown that increasing the proportion of iron dolomite in raw ore is beneficial to beneficiation and sintering production, but Jingtieshan Mine has not formulated an iron dolomite ore blending method. If JISCO adopts a single iron Grade control raw ore output, simply mining the rich and discarding the poor to ensure the output iron grade, in 2016, the cut-off iron grade of iron dolomite ore blending will be 30%, and more than 80% of iron dolomite will be discharged as surrounding rock, resulting in waste of resources At the same time, the recovery rate of Heigou was reduced, and the service life of the mine was shortened, which brought a series of impacts on the subsequent development of the mine, and the resource utilization rate was low

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