Preparation method and equipment of manganese removal agent

Abstract

The invention belongs to a pyrometallurgy technology, and particularly relates to a preparation method and equipment of a manganese removal agent for wet zinc smelting. Equipment for producing a manganese removal agent comprises a fluidized bed furnace, a cyclone and ceramic tube dust collector and a water cooling cylinder, the fluidized bed furnace comprises a furnace body, a fluidized bed furnace exhaust port is formed in the top of the furnace body, and a fluidized bed furnace feeding port, a fluidized bed furnace air inlet and a fluidized bed furnace discharging port are formed in the bottom of the furnace body; a discharge hole of the fluidized bed furnace is communicated with the water cooling cylinder; the cyclone and ceramic tube dust collector is provided with a smoke inlet, a smoke outlet and an air outlet; the fluidized bed furnace air outlet is communicated with the smoke dust air inlet; the air outlet is communicated with the outside atmosphere; and the smoke dust discharge port is communicated with the feed port of the fluidized bed furnace. The smoke dust produced by the fluidized bed furnace is high in rate, and the smoke dust returns to fluidized bed roasting so as to improve the sintering conversion rate. The sintering conversion rate of the sodium manganate can reach 90% or above.

Description

technical field [0001] The invention belongs to the technology of pyrometallurgy, and in particular relates to a preparation method and equipment for a manganese removal agent for wet zinc smelting. Background technique [0002] In the process of wet zinc smelting, in order to ensure the high current efficiency of zinc electrowinning and the quality of zinc products, it is required to contain Mn 5-7g / L in the electrowinning solution, manganese should be supplemented when manganese is low, and manganese should be removed when manganese is high. When the zinc concentrate contains high manganese, manganese will gradually accumulate as the zinc smelting process proceeds, so it is necessary to remove excess manganese from the zinc smelting system. Most of the current production uses oxidants to remove manganese, such as potassium permanganate, sodium permanganate and persulfate. These oxidants have good manganese removal effects, but are uneconomical and costly. Therefore, how t...

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Problems solved by technology

The method adopts a gas-solid fluidized bed reactor to intermittently produce potassium manganate or sodium manganate, and the conversion rate of manganese in the pyrolusite of this method can reach 93.4%, but the two-stage roasting process is long and complicated, and there are Multiple times of grinding and heating and cooling, and the production is discontinuous, the efficiency is low, and the energy consumption is large

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