Method for controlling particle size of compressed-leached material of zinc sulfide concentrate

A zinc sulfide concentrate, pressure leaching technology, applied in the direction of improving process efficiency, etc., can solve the problems affecting the completeness of the concentrate reaction, damage to the agitator of the adjustment tank, and unfavorable resource utilization, so as to improve resource utilization, The effect of avoiding wrapping and preventing clogging

Active Publication Date: 2013-02-13
CINF ENG CO LTD
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  • Claims
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Problems solved by technology

During the production process, due to improper control of the operating conditions of the reactor, the elemental sulfur generated during the leaching process will melt, increase the viscosity, and form a wrapped polymer with the unreacted sulfide, which will affect the completeness of the concentrate reaction and reduce the leaching rate of zinc. It is not conducive to the improvement of resource utilization
At the same time, the particle size of the leached material grows rapidly in the regulating tank, forming: "pressing the tank" phenomenon, damaging the agitator of the regulating tank, and causing the entire system to be blocked in serious cases, resulting in the failure of production

Method used

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  • Method for controlling particle size of compressed-leached material of zinc sulfide concentrate

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Example Embodiment

[0023] Example 1

[0024] A method for controlling the particle size of zinc sulfide concentrate pressurized leaching material, the method is implemented in the following equipment: the equipment includes a reactor, a flash tank connected to the reactor, and an adjustment tank connected to the flash tank; Including the following steps:

[0025] (1) The pulp is fed into the reactor; the reaction conditions in the reactor are as follows: reaction time is 1-2h, stirring speed is 75-90r / min; temperature is 150℃; pulp acidity is 30g / L; oxygen pressure is 1200 kPa (G) The addition rate of the additive is 1.5 kg / t; the additive is composed of calcium lignosulfonate and hardwood tannin extract at a mass ratio of 1:1;

[0026] (2) The pulp discharged after the reaction in the reactor is sent to the flash tank for preliminary cooling. The pulp temperature during the discharge is 150°C; the pressure is 1200 kPa(g); the pulp temperature after the preliminary cooling is 120°C; The pressure

Example Embodiment

[0029] Example 2

[0030] An additive used in the method described in the embodiment, the additive is composed of calcium lignosulfonate and hardwood tannin extract at a mass ratio of 1:1.

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Abstract

The invention discloses a method for controlling the particle size of a compressed-leached material of zinc sulfide concentrate. With the adoption of the method, the operation conditions of compressing and leaching processes of the zinc sulfide concentrate are controlled, so that the problem of adjusting slot blockage is solved, a production system is kept to run continuously and stably, and the production efficiency of the system is increased. Compared with single additive, two leaching additives are adopted to ensure that the unit consumption of the additive is reduced to 1.5kg from 2kg in each ton of concentrates, and the decreasing amplitude is up to 25-30%, so that the production cost is reduced. With the addition of effective additives, the un-reacted concentrate is protected from being enveloped by fused sulfur in the leaching process, so that the concentrate can react more completely, the leaching rate is up to 98-98.5%, and the using ratio of the resource is increased.

Description

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Claims

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Application Information

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Owner CINF ENG CO LTD
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