Smelting process for rich manganese and equipment thereof

Abstract

The invention provides a new smelting process for rich manganese and equipment thereof. Based on the prior art, appropriate measures are taken to treat polymetallic associated ores and lean manganese ores with very low manganese-iron ratio so as to achieve the purposes of increasing the proportion of the manganese in the slag, controlling the content of Mn in the cast iron according to actual demands and improving the grade of rich manganese slag. In addition, the smelting process for the rich manganese and the equipment thereof has low energy consumption, the equipment is advanced and the process is integrative.

Description

technical field [0001] The invention relates to an enrichment and smelting method and equipment for polymetallic associated ore and poor manganese ore, in particular to an integrated smelting method and equipment for manganese enrichment and diversified low-manganese ferroalloys. Background technique [0002] At present, my country and many other countries have a large number of polymetallic associated ores and poor manganese ores with a very low ratio of manganese to iron. For example, the content of manganese ore in Tongling, Anhui is 5-8% of Mn, 40-48% of Fe, and 0.1% of P. The content of Pb is 0.5%, and the content of Zn is 2%. For example, the content of manganese ore in Australia and South Africa is 32% of Mn, 24% of Fe, 0.8% of Pb, and 1.5% of Zn. This kind of ore has low grade and is difficult to smelt. The mechanical beneficiation method cannot separate and enrich the iron and manganese in this kind of ore, so that this kind of ore can neither make iron nor be used a...

AI Technical Summary

Problems solved by technology

The high iron in manganese-rich slag leads to high cost of downstream ferroalloy factories and is also subject to foreign businessmen, because they must import low-iron manganese ore; and the process of patent No. 88104767.8 is not conducive to the diversification requirements of downstream customers for low-manganese ferroalloys

[0007] On the other hand, the raw material ore of manganese iron ore contains a certain amount of lead. Due to the large proportion of lead, the lead liquid deposits to the bottom of the furnace during the smelting process and may penetrate the refractory bricks at the bottom of the furnace, resulting in Damage will not only easily lead to safety accidents, but also increase investment and stop production due to repairs, seriously affecting normal production; in addition, the lead and zinc contained in manganese ore are likely to produce "lead-zinc tumors" during the smelting process, resulting in The abnormal flow of liquid materials in the reaction furnace will affect the quality of the product, and even cannot produce normally

[0008] In addition, the raw material ore of ferromanganese ore also contains a certain amount of zinc. Zinc dust is produced during the smelting process. As high as 200°C, high-temperature zinc dust is prone to combustion when it encounters oxygen in the air, often causing the outlet of the dust bag and even the entire dust bag to be burned, which not only affects normal production, but also increases production costs

[0009] In addition, the discharge port (mainly molten iron) and slag discharge port (mainly manganese and other slag) of the existing reaction furnace are set separately in different positions of the furnace body, which need to be set separately on the periphery of different sides of the furnace body The sites for the follow-up processing of products corresponding to the discharge port and the slag discharge port (such as stripping waste slag and forming) respectively occupy a large area, and there are inevitably problems of mutual influence between different processes, which not only increases production costs, but also increases production costs. reduce production efficiency

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