Method and system for preparing agricultural potassium sulfate from manganese series ferroalloy smelting fly ash
A ferroalloy and potassium sulfate technology is applied in the field of manganese-based ferroalloy smelting dust removal ash to prepare agricultural potassium sulfate, which can solve the problems of unsatisfactory potassium extraction rate, unsatisfactory economic efficiency, and high overall process cost, and achieve improved leaching rate, convenient operation, and Reduce the effect of accompanying leaching
Active Publication Date: 2020-10-30
五矿(湖南)铁合金有限责任公司
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Problems solved by technology
[0006] The existing method also has the disadvantages of unsatisfactory potassium extraction rate, high overall process cost, and unsatisfactory economic efficiency.
Method used
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Embodiment 1
[0073] It is mainly achieved through the following steps.
[0074] Step 1: Sampling
[0075] Manganese-based ferroalloy smelting dedusting ash sampling, detection and analysis of particle size and water content, using X-fluorescence spectrum analysis and chemical analysis methods to detect the content of its constituent elements. The content of dedusting ash with a particle size below 200 mesh is ≥90%.
[0076] Table 2 X-ray fluorescence spectrum analysis of manganese-based ferroalloy dust removal dust, %
[0077]
[0078] Step Two: Water Immersion
[0079] (2.1): One stage leaching
[0080] Divide the dedusting ash into three parts; place them in the first leaching tank ~ the third leaching tank respectively;
[0081] In the first leaching tank, place the first portion of dedusting ash, add clear water (wherein, the amount of water is 7 times the weight of dedusting ash), perform leaching operation, and then suction filter to obtain the first leaching solution and the ...
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Abstract
The invention discloses a technical process for preparing agricultural potassium sulfate from manganese series ferroalloy smelting fly ash. The method comprises the following steps of: (1) carrying out gradient leaching on the manganese-series ferroalloy smelting fly ash to obtain a first-stage leaching solution, and carrying out ion exchange on the leaching solution to obtain a potassium sulfateproduct; and (2) carrying out second-stage leaching on the leached residues obtained in the first-stage leaching process, and taking the separated second-stage leaching solution as a leaching washingsolution of a first sample in the next batch of first-stage leaching process. The method has the advantages of simple technique, no industrial wastewater or waste in the process, lower capital and equipment investment, low cost and obvious economic benefit, and is suitable for industrial application.
Description
technical field [0001] The invention relates to a method and a system for preparing agricultural potassium sulfate from manganese-based ferroalloy smelting dedusting ash. Background technique [0002] Manganese-based ferroalloy smelting dust is a solid produced in the process of manganese-based ferroalloy production and treatment of flue gas. Zinc and other content is not low. The beneficial elements in manganese-based ferroalloy smelting dust can be recovered and its economic value can be improved. [0003] In the prior art, some methods of processing dust from the smelting of manganese-based ferroalloys have also been reported. For example, the publication number is CN106518180A Chinese Invention Patent literature report with manganese-containing dedusting ash to produce the method for potassium magnesium sulfate fertilizer and manganese sulfate, the method has the following steps: ball milling, fertilizer soaking, solid-liquid separation (1), slag washing, soaking Mang...
Claims
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IPC IPC(8): C01D5/00C05D1/02C01C1/16
CPCC01D5/00C05D1/02C01C1/164Y02P10/20
Inventor 王雄曹殊材
Owner 五矿(湖南)铁合金有限责任公司