Bottom-blowing oxidation rough smelting technology for antimony ore and metallurgical furnace

Abstract

The invention discloses a bottom-blowing oxidation rough smelting technology for antimony ore and a metallurgical furnace. The bottom-blowing oxidation rough smelting technology for antimony ore includes the steps as follows: supplying heat by coking coal or lump coal, supplying air and oxygen into a hearth by a fan, adding coal and antimony ore burden into the hearth from the top or the upper side surface of the furnace body, enabling the air of the fan to blow into the hearth from bottom to top after the air passes through a distribution plate from the bottom of the hearth, allowing flue gas to enter a condensation dust-collection system from the upper side surface or the top of the furnace body, and discharging solid-state slag from the bottom or the lower side surface of the furnace body. The metallurgical furnace comprises the furnace body, wherein the top or the upper side surface of the furnace body is provided with a burden feed hole; the furnace body is provided with an air flow distribution plate at the bottom of the furnaced; the fan supplies air upwards from the bottom of the furnace through the air flow distribution plate; the top or the upper side surface of the furnace body is provided with a flue gas outlet for leading the flue gas to enter the condensation dust-collection system; and the bottom of the furnace body is provided with a slag discharge hole. The metallurgical furnace integrates the characteristics of an existing blast furnace, an open-hearth furnace and a roasting furnace and has the characteristics of high stock columns, thin stock layers, low coke rate and high recovery rate.

Description

technical field [0001] The invention relates to a bottom-blown oxidation roughing process and a metallurgical furnace for antimony ore. Background technique [0002] There are three commonly used antimony ore rough smelting processes and metallurgical furnaces, one is the blast furnace volatilization smelting process, and the other two are the open hearth furnace and roasting furnace smelting process, of which the open hearth furnace is similar to the roasting furnace. [0003] 1. Blast furnace and its volatilization smelting process [0004] The antimony blast furnace was invented by the Xikuangshan Mining Bureau in 1963. It realizes the oxidation and volatilization of antimony sulfide concentrate, the reduction and decomposition of high-valent antimony oxide and the veining in the blast furnace with low material column, thin material layer, high coke rate and hot furnace roof. The slagging separation of ore, because of its strong adaptability to ore, large bed capacity, an...

AI Technical Summary

Problems solved by technology

[0009] (1) High energy consumption, especially the coke rate, which is about 35% to 40% of the ore weight in ordinary blast furnaces;

[0010] (2) The flux rate is high, resulting in high slag rate, which affects the recovery rate of antimony metal;

[0011] (3) The economic benefits of processing low-grade ore are poor due to factors such as high coke rate and low recovery rate

[0013] The open hearth furnace is similar to the roasting furnace. It is heated by coke or lump coal to process low-grade sulfide lump ore to produce solid slag. The oxygen required for the open hearth reaction is blown into the furnace from the bottom of the furnace bridge by a centrifugal fan. The machine draws air into the furnace, the mechanization degree of the open hearth furnace and the roasting furnace is low, the two-handed operation, the labor productivity is low, and the bed capacity is small (4-6t / m 2 .d), poor ore adaptability, low smelting recovery rate

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