Chemical desiliconization method and application in black soil type iron oxide manganese ore beneficiation

A technology for oxidizing iron-manganese ore and desiliconization, which is applied in the field of mineral engineering, can solve the problems of complex process flow, high equipment requirements, and high roasting costs, and achieve the effect of broad application prospects, low equipment requirements, and high desiliconization efficiency

Active Publication Date: 2017-03-29
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the black soil type iron-manganese oxide ore with fine embedded particle size, difficulty in dissociation, high content of silicon and aluminum in iron concentrate, high roasting cost, high equipment requirements, complex process flow and environmental pollution. and other problems, and provide a chemical desiliconization method, and apply it to the desilication process of black soil type iron manganese oxide ore

Method used

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  • Chemical desiliconization method and application in black soil type iron oxide manganese ore beneficiation
  • Chemical desiliconization method and application in black soil type iron oxide manganese ore beneficiation
  • Chemical desiliconization method and application in black soil type iron oxide manganese ore beneficiation

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Embodiment 1

[0036] The ore sample is black soil iron manganese oxide ore in Lanshan County, Yongzhou, Hunan. The ore is crushed to a particle size of less than 0.25mm. The main chemical composition and element content of the ore are shown in Table 1. The elements with higher content in the ore sample are iron, manganese, aluminum and silicon. The main phase compositions of iron and manganese are limonite and ferromanganese spinel, accounting for about 99% and 86.80% respectively, and the grades of iron and manganese are 40.10% and 8.69% respectively. Gangue minerals mainly exist in the form of aluminosilicate, with a silicon dioxide content of 8.92% and an aluminum oxide content of 13.06%. Useful minerals and gangue minerals are distributed in fine grains, which belong to extremely difficult limonite. Alkali lignin, purchased from Shandong Weili Chemical Technology Co., Ltd., is a by-product of papermaking, an industrial product, with a molecular weight of 1,000-100,000, and its main te...

Embodiment 2

[0042] The ore sample and alkali lignin used are the same as in Example 1. Mix 5% alkali lignin, 13% sodium carbonate and the ore sample evenly, then reduce and roast, the roasting temperature is 300°C, and the roasting time is 60 minutes, the iron grade is 58.40%, the iron recovery rate is 91.26%, and the yield rate is 62.45%. Iron ore concentrate, in which the manganese content is 9.48%, its Al and Si content are reduced from 9.40% and 6.92% of the original ore to 2.57% and 0.69%, and the leaching rates of Al and Si reach 82.93% and 93.77% respectively. The leaching sulfuric acid concentration is 2mol / L, the leaching time is 5min, the leaching temperature is 60°C, and the liquid-solid ratio is 10:1.

Embodiment 3

[0044] The ore sample and alkali lignin used are the same as in Example 1. Control the amount of alkali lignin to 5%, the amount of calcium carbonate to 7%, the roasting temperature is 100°C, and the roasting time is 30 minutes. L. The liquid-solid ratio is 10:1, and the leaching time is 5 minutes. The iron grade is 51.02%, the recovery rate is 99.21%, and the yield rate is 83.74%. The content of Al and Si decreased from 9.40% and 6.92% of the original ore to 4.71% and 2.17%, and the leaching rate of Al and Si reached 58.04% and 73.74%.

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Abstract

The invention discloses a chemical desiliconization method and application in black soil type iron oxide manganese ore beneficiation. The chemical desiliconization method adopts microwaves to serve as a heating source so that silicon in silicate mineral can be quickly activated at the low temperature and then can react with alkali (soil) metallic oxide (salt) additives to generate acid-soluble salt, and the desiliconization purpose is achieved through an acid pickling process. The application of the chemical desiliconization method in black soil type iron oxide manganese ore beneficiation comprises the following steps that black soil type iron oxide manganese ore is crushed and ground to be 0.9 mm or less, then uniformly mixed with lignin additives and the alkali (soil) metallic oxide (salt) additives and put into a microwave reaction device for reducing roasting, and roasted ore is obtained; the roasted ore is cooled naturally and added into an acid solution to be subjected to stirring, leaching and desiliconization at the low temperature; and solid-liquid separation is conducted, and the obtained solid phase is iron ore concentrate. The chemical desiliconization method and application in black soil type iron oxide manganese ore beneficiation have the advantages of being low in pretreatment requirement, mild in reaction condition, high in desiliconization efficiency, small in acid consumption, high in iron recovery rate, free of pollution, controllable and the like and have wide application prospects.

Description

technical field [0001] The invention relates to the technical field of mineral engineering, in particular to a chemical desiliconization method and its application in beneficiation of black soil type iron manganese oxide ore. Background technique [0002] The total reserves of iron ore resources in my country are abundant, but it has been found that the vast majority of iron ore is low-grade lean iron ore with high impurity content, and the ore is embedded with fine particle size and complex symbiotic relationship. Most iron ore needs to be processed before it can be put into the furnace. Smelting utilization. Due to its "poor, fine, and miscellaneous" characteristics, it is difficult to sort, and it is often difficult to obtain satisfactory sorting indicators by conventional processing methods, and most of them have not yet been mined and utilized. Iron ore is the main raw material for steel production. With the rapid development of the steel industry, the supply and demand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08
CPCC22B3/08
Inventor 钟宏武芳芳王帅曹占芳刘广义
Owner CENT SOUTH UNIV
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