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首页> 外文会议>International Conference on Alternative Routes of Iron and Steelmaking ICARISM'99, Sep 15-17, 1997, Perth, WA >Production of High-Quality DR Grade Pellets at IMEXSA
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Production of High-Quality DR Grade Pellets at IMEXSA

机译：在IMEXSA生产高品质DR级颗粒

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摘要

The Ispat Mexicana SA de CV (IMEXSA) pelletising plant is located at Lazaro Cardenas on the west coast of Mexico. It is the primary source of feed stock for the adjacent direct reduction (DR) plants and steelmaking facilities. The initial design of the pellet plant began in 1981 for 3 Mtpa of DR grade pellets using local concentrate received by pipeline. Several construction delays, an ownership change, and a decision to use imported concentrates delivered in 60 000 to 90 000 tonnes ship cargoes required flowsheet modifications and additions. The design concepts are described for the plant which includes concentrate regrind to final pelletising particle size. Pellet production began in December 1996 to produce 3.5 Mtpa. Together with 1.5 Mtpa from Pena Colorada as 50 per cent joint ownership, this satisfies the pellet requirements for a Midrex megamod at 1.2 Mtpa and the four reactors of HYL III process at 2 Mtpa to increase the production in the steelmaking plant and continuous casting to 3 Mtpa of slab. IMEXSA's pellet plant philosophy of a high quality 'minimum gangue, high total iron' DR pellet at minimum cost, was developed through two years of operation. The versatility built into the plant, and techniques used to predict the operating setpoints was proven as the plant operated on the modified chemistry with 18 different ore blends from seven imported concentrates in 1997 and 1998. All the blends were processed to obtain high DR quality pellets.
机译：Ispat Mexicana SA de CV（IMEXSA）制粒厂位于墨西哥西海岸的Lazaro Cardenas。它是邻近的直接还原（DR）厂和炼钢设施的主要原料来源。颗粒厂的最初设计始于1981年，使用3Mtpa的DR级颗粒，使用的是管道输送的局部浓缩物。几次施工延误，所有权变更以及决定使用从60,000至90,000吨船货中交付的进口精矿的决定，都需要对流程图进行修改和补充。描述了针对工厂的设计概念，其中包括将精磨料重新研磨成最终造粒的粒度。颗粒生产于1996年12月开始，产量为3.5 Mtpa。加上来自Pena Colorada的1.5 Mtpa（共同拥有50％的股份），满足了1.2 Mtpa的Midrex megamod和2 Mtpa的HYL III工艺的四个反应器的颗粒要求，从而将炼钢厂的生产和连续铸造提高到3平板Mtpa。通过两年的运营，IMEXSA的制粒厂理念是以最低的成本获得高质量的“最小脉石，高总铁” DR球团。工厂的多功能性和用于预测运行设定点的技术在1997年和1998年通过使用来自7种进口精矿的18种不同矿石混合物进行改良化学操作而得到证明。所有混合物经过加工均获得了高DR质量的颗粒。

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