A long-life and durable lead-antimony alloy high-grade antimony white volatilization furnace

Abstract

The invention relates to a durable lead-antimony alloy top-grade antimony white volatilization furnace with long service life. The durable lead-antimony alloy top-grade antimony white volatilization furnace comprises a furnace body (17), wherein the furnace body is a semispherical pot body formed by a furnace body wall (16) and a furnace bottom substrate (18), the furnace body wall is provided with a flame nozzle (1) facing the bottom of the furnace body and a feed opening (3) which is communicated with an inner cavity of the furnace body; a high temperature refractory material layer (4) with high slag invasion resistance is embedded nearby a slag line of the inner cavity of the furnace body; a gas collection cover (5) is arranged on the top of the furnace body in a covering manner, the gas collection cover is of a conical structure, a plurality of primary gas inlet nozzles (6) which incline towards the liquid surface in the furnace body are arranged on the gas collection cover, and a central slag fishing opening (9) which can be opened and closed is formed in the middle part of the gas collection cover; and a secondary gas inlet (13) and a gas outlet (8) with a valve (7) are formed in the central slag fishing opening. The furnace body is long in service life, unlikely to damage and simple and convenient to operate.

Description

technical field [0001] The invention relates to a lead-antimony alloy antimony white volatilization furnace, in particular to a long-life durable lead-antimony alloy high-grade antimony white (wherein Sb 2 o 3 The cubic crystal form is greater than 99.5%, and the fineness is 0.1-0.5μm). Background technique [0002] Antimony white, whose chemical name is antimony trioxide, is widely used in industry. There are two production methods of antimony white: fire method and wet method. At present, the production of antimony white in my country is dominated by the fire method, and its output accounts for more than 95% of the output of antimony white. Fire method is divided into direct method and indirect method. [0003] The direct method is to use the antimony sulfide concentrate with few harmful impurities (Pb+As) (<0.5%) as raw material, through direct oxidation and volatilization, and cooling to prepare antimony white. [0004] One of the indirect methods is to use high-...

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Problems solved by technology

[0005] Another indirect method is to use the lead-antimony alloy after refining and removing As and Sb, usually the Sb content is between 25% and 95%, and use an indirectly heated pot to melt the lead-antimony alloy and keep it at 650°C-750°C During the period, preheated air is blown to the surface of the melt to preferentially oxidize and volatilize the antimony, and the secondary air is used to quench it. However, in the existing technology, the furnace shape is designed to be rectangular or square in order to facilitate the removal of oxidation scum.

However, this kind of furnace-shaped pot body is heated unevenly, the thermal stress is concentrated, and it is easy to cause cracks, resulting in leakage of metal and deformation of the furnace bottom, and the service life is short.

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