Process for using jarosite ore pulp to directly wash ore without filtering
A technology of sinking alum and pulp, applied in the field of hydrometallurgy, which can solve the problems of large loss of zinc metal, achieve the effects of reducing metal zinc loss, simplifying the leaching process, and reducing environmental pollution
Active Publication Date: 2015-01-21
BAIYIN NONFERROUS GROUP
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Problems solved by technology
In the process of solid-liquid separation, "running, popping, dripping, and leaking" are inevitably caused, and the loss of zinc metal is relatively large
Method used
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[0018] The aluminite will be added in 70g / l acid to react for 1.5h, and the experimental results are as follows:
[0019] Table 1 Acid and iron content of sinker pulp in 70g / l acid
[0020] project 0min 30min 60min 90min H + 71.40 70.7 71.71 71.4 Fe 3+ 2.14 2.11 2.06 2.07
[0021] It can be seen from the experimental data that the iron content has not increased, which proves that the jarosite does not dissolve under the acidity of the oxidizing solution, and the submerged alum slurry can directly enter the oxidation tank without pressure filtration.
[0022] Through experiments, it is determined that the oxidizing solution is directly prepared in the sinker slurry, and the liquid-solid ratio of the oxidizing solution added to the zinc calcine for 2 hours is 7-8:1, which fully meets the production requirements. Therefore, the heavy alum slurry can be washed directly without filtering.
[0023] Such as Figure 1 to Figure 2 Shown: a ki...
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Abstract
The invention provides a process for using jarosite ore pulp to directly wash ore without filtering. The process comprises the following steps: (1) by adding waste liquid, the jarosite ore pulp is prepared into oxidation liquid with the acidity of 68-73g / l, the zinc (Zn<2+>) content of 90-110g / l and the iron content of 1-2g / l, wherein the waste liquid is from other procedures of wet-process zinc smelting, and the physical parameters are the acidity being 170-180g / l and the zinc (Zn<2+>) content being 55-65g / l; (2) zinc calcine is added into the oxidation liquid to wash the ore and enter a neutral leaching procedure; (3) the jarosite ore pulp enters an oxidation tank directly for preparing the oxidation liquid, and the oxidation liquid enters the neutral leaching procedure after washing the ore; (4) after the neutral leaching procedure reacts for 2 hours, the neutral leaching slag is obtained by liquid-solid separation, iron vitriol slag generated by the jarosite enters the neutral leaching slag, the neutral leaching slag enters I-stage acid leaching and II-stage acid leaching in sequence, and the insoluble zinc is thoroughly cracked. The process provided by the invention has the advantages that the solid-liquid separation is not carried out on the jarosite ore pulp, so that the leaching process is simplified; the iron vitriol slag can be fully leached, zinc contained in the slag is reduced from 6.5% to 5%; by accounting according to the yield of 20,000 tons, the zinc-metal loss can be reduced by 270 tons, and equivalently, the annual economic benefit is more than **-**.
Description
technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a new technology in which alum-slumped pulp is not subjected to liquid-solid separation in a hydrometallurgy system, and the pulp is directly flushed into ore and enters neutral leaching. Background technique [0002] Zinc hydrometallurgy mainly includes five main processes: roasting, leaching, purification, electrolysis, and melting and casting. The purpose of leaching is to make the zinc in the zinc calcine enter the solution as much as possible, and other impurities such as iron and arsenic enter the solution as little as possible. Leaching includes neutral leaching, high-temperature high-acid leaching, pre-neutralization, alum sinking and other processes, as well as solid-liquid separation in each process. The solid-liquid separation in each process of leaching mainly depends on the sedimentation of the thickener or the filter separation of the chamber pr...
Claims
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IPC IPC(8): C22B3/04C22B3/06C22B19/00
CPCY02P10/20
Inventor 王永红马菲菲师晓军甘文仲
Owner BAIYIN NONFERROUS GROUP