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Method for utilizing zinc-containing raw ore through strontium zincate synthesis step

A technology of strontium zincate and strontium acid, which is applied in the field of utilization of low-grade zinc-containing raw ore, can solve the problems of non-compliance with the policy orientation of energy saving and emission reduction, the overall grade of zinc ore is low, and the leaching efficiency is not ideal, and can solve the problem of process recovery rate and quality of high-quality products, avoid a large amount of impurities co-precipitation, and avoid the effect of water treatment pressure

Active Publication Date: 2019-09-13
CHONGQING DONGQUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current industrial status quo urgently needs to solve this problem, because although the total amount of zinc resources in my country is abundant, the overall grade of zinc ore is low, and a large number of dull ore and lean ore cannot be effectively treated due to the lack of industrially economical and effective treatment methods. Utilization, a large amount of zinc raw materials have to be imported every year to meet the needs of production and consumption. At the same time, a large number of mining tailings and mineral processing tailings containing 3% to 5% zinc oxide are stockpiled, causing great pressure
[0004] The existing low-grade zinc ore treatment technology has many defects, so it is difficult to use in actual production
For example, the process of pyroprocessing low-grade zinc oxide ore is facing elimination due to high energy consumption and heavy pollution, which does not meet the policy orientation of energy conservation and emission reduction.
Flotation is currently the main process for processing zinc oxide ore, but the low recovery rate and low concentrate grade are common problems faced by various flotation processes
The wet extraction of zinc ore has problems such as poor leaching selectivity, unsatisfactory leaching efficiency, and difficult recovery after leaching.
Therefore, the prior art lacks a cost-effective method to prepare various industrial products from low-grade zinc ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] In a zinc mine in Yunnan, the zinc content is 5.6%, and the oxidation rate of the raw ore is 96.3%. The main form of zinc in this mine is zinc carbonate.

[0108] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (10% of total ammonia mass concentration, 3% of carbonate root mass concentration) and carry out stirring and leaching, the leaching temperature is normal temperature, and the stirring time is 2 hours, Then filter, the filtered liquid contains 1.632% zinc (calculated in zinc oxide equivalent), the mass concentration of carbonate in the liquid is 4.23%, and the increased part is brought in by zinc carbonate in the raw ore. According to the test data, the recovery rate of soluble zinc in the raw ore during the leaching process is 90.79%, and the recovery rate of total zinc is 87.43%.

[0109] Purify the zinc ammonia complex solution obtained by filtering.

[0110] Take 600 ml of zinc-ammonia complex...

Embodiment 2

[0113] In a zinc mine in Chongqing, the zinc content is 4.7%, and the oxidation rate of the raw ore is 95.52%. The main form of zinc in this mine is zinc silicate.

[0114] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (10% of total ammonia mass concentration, 3% of carbonate root mass concentration) and carry out stirring and leaching, the leaching temperature is normal temperature, and the stirring time is 2 hours, Then filter, the filtered liquid contains 1.367% zinc (in zinc oxide equivalent), the mass concentration of carbonate in the liquid is 3.54%, and the increased part is brought in by zinc carbonate in the raw ore. According to the inspection data, the recovery rate of soluble zinc in the raw ore during the leaching process is 91.35%, and the recovery rate of total zinc is 87.26%.

[0115] Purify the zinc ammonia complex solution obtained by filtering.

[0116] Take 600 ml of zinc-ammonia complex s...

Embodiment 3

[0119] The difference from Example 1 is that in Example 3, calcium oxide precipitated carbonate is added to the zinc-ammonia complex solution obtained by leaching and filtered, and 500 milliliters of the filtered liquid is taken, and 3 mg of dodecylbenzenesulfonate is added first. Sodium acid, then add 4.46 grams of strontium oxide for the synthesis of strontium zincate. All the other steps and reagent consumption of Example 3 are the same as in Example 1.

[0120] Sampling and analysis of the obtained final product showed that the content of strontium zincate in the solid was 99.57% and the average particle diameter was 32.7nm.

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Abstract

The invention relates to a method for utilizing zinc-containing raw ore through the strontium zincate synthesis step, comprising the following steps: leaching, optional purification, decarburization,strontium zincate synthesis, optional rinsing, drying or calcining. The invention realizes the synthesis of strontium zincate in a zinc ammonia environment; the reaction selectivity for synthesis of strontium zincate from zinc ammonia complex-ions is high, and the synthesis is simple and fast; and the high added-value product is prepared economically and environmentally from the low-grade raw orewhich is hard to deal with. The method of the invention has a wide range of application, and can effectively extract and utilize various forms of zinc-containing raw ore and enrich the zinc element through the strontium zincate synthesis route, thereby solving problems of process recovery rate and quality product grade. The product obtained by the method can be directly used as a product, and alsocan be used as an industrial raw material.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, and relates to resource utilization of low-grade zinc-containing raw ore, in particular to a method for utilizing zinc-containing raw ore, especially low-grade zinc-containing raw ore, through a synthesis step of strontium zincate. Background technique [0002] Strontium zincate is a valuable material in special ceramics, battery electrodes, fluorescent materials, etc. However, the preparation of strontium zincate is still limited to laboratory exploration, and the preparation scale is small and the cost is high. The industrial production method of strontium zincate is still immature, and there is a lack of methods that can be applied industrially and stably produce strontium zincate and its derivatives on a large scale, especially lack of production methods starting from zinc-containing raw materials with high impurity content. [0003] The process of economically and efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00C22B3/14C22B3/44C22B19/20
CPCC01G9/006C22B3/14C22B3/44C22B19/24C01P2006/80Y02P10/20
Inventor 岳辉伟李世川龙忠祥蒋涛刘权锋
Owner CHONGQING DONGQUN TECH CO LTD
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