Treatment method of kaolin mineral processing waste water
A technology of beneficiation wastewater and treatment method, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high water treatment cost and inability to achieve recycling , to achieve the effect of reducing treatment costs, reducing pollution and saving water resources
Inactive Publication Date: 2013-05-01
中国高岭土有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a method for treating kaolin beneficiation wastewater, which mainly solves the problems that current kaolin beneficiation wastewater cannot be recycled and the cost of water treatment remains high
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[0024] Embodiment: A kind of kaolin beneficiation wastewater treatment method
[0025] For kaolin beneficiation wastewater that is acidic and contains sulfate ions with an ion concentration above 2000 mg / L, phosphate ions with an ion concentration between 400 and 500 mg / L, and iron ions with an ion concentration above 2000 mg / L, sequentially It consists of the following steps to treat mineral processing wastewater. For the process flow, see the attached figure 1 Shown:
[0026] The first step is to take industrial pure calcium oxide as a neutralizing agent, then add water to the industrial pure calcium oxide and stir until it is emulsified into lime slurry; And in the kaolin beneficiation wastewater of iron ions, wherein, the addition amount of the industrial pure calcium oxide is based on the pH value of the treated wastewater water body reaching 7~8; stirring for about 30 minutes, the reaction is carried out thoroughly, and the reaction generates a precipitate Calcium sulf...
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The invention discloses a treatment method of kaolin mineral processing waste water. The method is characterized in that the method sequentially comprises the following steps that 1, industrial calcium oxide is added to the kaolin mineral processing waste water until a pH value of the treated waste water is 7-8; reaction is conducted; a precipitate is generated; 2, filter pressing is conducted by a press filter; clear water after primary water treatment is obtained; 3, industrial-pure sodium carbonate is added to the clear water until a removal rate of calcium ions is greater than or equal to 98%; the reaction is conducted; a precipitate is generated; and 4, the filter pressing is conducted by the press filter, and recycling clear water after secondary water treatment and the precipitate generated in Step 3 are obtained finally. The treatment method aims at the kaolin mineral processing waste water, the mineral processing waste water can be recycled completely; water resources are saved; a by-product, namely calcium carbonate with very high purity is obtained during water treatment; and the water treatment cost is lowered.
Description
technical field [0001] The invention relates to the technical field of beneficiation wastewater treatment and its recycling, and belongs to the field of non-metallic mineral processing, in particular to a method for the treatment of kaolin beneficiation wastewater. 4 2- 、PO 4 3- , Fe 2+ The ionic kaolin beneficiation wastewater is physically and chemically treated to reduce the concentration of each ion to a reasonable range, adjust the pH to neutral, and then recycle it, and at the same time obtain the by-product CaCO 3 . Background technique [0002] For a long time, due to the historical reasons of low access threshold and low added value, most of the treatment of mineral processing wastewater in the domestic non-metallic mineral processing field is to simply add alkali to neutralize the pH value. Many small processing plants even directly discharge the mineral processing wastewater without treatment. caused great damage to the environment. Some large-scale kaolin e...
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Inventor 冯杰李勇袁金刚胡流球张忠飞张飞李青刘松文斐申益兰
Owner 中国高岭土有限公司