Method for separating boron and iron from ludwigite

A boronite and ferroboron technology, which is applied in the fields of borax, boric acid and high-grade iron concentrate, preparation of sodium metaborate/perborate, and boronite and ferroboron separation, which can solve the problem of high energy consumption, equipment corrosion, and difficulty in waste acid. To deal with other problems, to achieve the effect of improving resource utilization, easy operation control, and improving utilization value

Inactive Publication Date: 2017-01-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the pyro-iron-boron separation process requires high-temperature roasting, which consumes a lot of energy and high energy consumption; the wet-method iron-boron separation process B 2 o 3 Low yield, serious equipment corrosion, complex process, difficult disposal of waste acid, high cost

Method used

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  • Method for separating boron and iron from ludwigite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for separating boron-iron from boron-containing iron ore, said boron-iron ore is boron-iron ore powder in a certain place in Liaoning, and the composition of this boron-iron ore is:

[0050] components B 2 o 3

SiO 2

CaO MgO al 2 o 3

TF Na 2 o

Contentwt% 5.88 4.23 1.62 11.24 0.47 52.98 0.18

[0051] The method comprises the steps of:

[0052] (1) NaOH solution with a mass fraction of 25%, according to the mass ratio of NaOH solution: boronite powder = 4:1, mix the ingredients evenly, place in the reaction kettle, heat up to 180°C, react for 2h, cool to 90°C, feed The slurry is filtered to obtain the iron ore powder filter residue and the eluate containing sodium metaborate;

[0053] (2) Add calcium oxide to the eluate containing sodium metaborate, stir at 100°C for 2 hours to remove impurities, filter, evaporate and concentrate the filtrate, cool and crystallize at 25-30°C for 6 hours, and filter to ob...

Embodiment 2

[0058] A method for the separation of boronite or boron and iron, the composition of the boronite is:

[0059] components B 2 o 3

SiO 2

CaO MgO Al 2 o 3

TF Na 2 o

[0060] Contentwt% 4.24 6.90 2.31 13.98 3.32 45.16 0.12

[0061] The method comprises the steps of:

[0062] (1) NaOH with a mass fraction of 25%, mix the ingredients according to the mass ratio of NaOH solution: boronite powder = 1:1, place in the reaction kettle, heat up to 160°C, react for 2h, cool to 90°C, and make the slurry Obtain iron ore powder filter cake and the eluate containing sodium metaborate through filtration;

[0063] (2) Add calcium oxide to the eluate containing sodium metaborate, stir at 100°C for 2 hours to remove impurities, filter, evaporate and concentrate the filtrate, cool and crystallize at 25-30°C for 6 hours, and filter to obtain sodium metaborate;

[0064] (3) Dissolve sodium metaborate in water, add hydrogen perox...

Embodiment 3

[0068] A method for the separation of boronite and boron iron, the composition of the boronite is the same as that of Example 1, and the method may further comprise the steps:

[0069] (1) NaOH with a mass fraction of 35%, according to the mass ratio of NaOH solution: boronite powder = 4:1, mix the ingredients evenly, place in the reaction kettle, heat up to 160°C, react for 2h, cool to 90°C with water, The slurry is filtered to obtain the iron ore powder filter cake and the eluate containing sodium metaborate;

[0070] (2) Add calcium oxide to the eluate containing sodium metaborate, stir at 100°C for 2 hours to remove impurities, filter, evaporate and concentrate the filtrate, cool and crystallize at 25-30°C for 6 hours, and filter to obtain sodium metaborate;

[0071] (3) Dissolve sodium metaborate in water, and introduce CO 2 , react at 30-40°C for 3-4 hours, cool to 20-25°C to crystallize, and obtain borax;

[0072] (4) The iron ore powder filter residue of step (1) is ...

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Abstract

The invention relates to a method for separating boron and iron from ludwigite. The method comprises the steps of dissolving out ludwigite by using a sodium hydroxide solution in an autoclave, after carrying out solid-liquid separation, enabling sodium metaborate to enter a dissolution fluid, and cooling a crystal after concentrating to obtain sodium metaborate, wherein sodium metaborate is used for preparing sodium perborate, borax and boric acid; and cleaning first filter residues, and carrying out magnetic separation to obtain a high-grade iron ore concentrate and realize boron and iron separation. According to the method for separating boron and iron from ludwigite, the ludwigite is not needed to be subjected to high-temperature activated roasting treatment, the operation condition for dissolution reaction is relatively mild, and the dissolution rate of boron oxide can reach 88-93% and above; the method can be used for reducing energy consumption and high-temperature roasting equipment investment and is easy to control in operation; the iron grade of the obtained iron ore concentrate is increased by 7-15% or above, so that the steelmaking and ironmaking requirements are met; and sodium metaborate obtained by separation is used for further preparing sodium perborate, borax, boric acid and the like which have high added values, so that the utilization value of boron is increased.

Description

technical field [0001] The invention belongs to the field of chemical engineering and mineral resource processing, and relates to the preparation of borate and the comprehensive utilization of boron ore. Specifically, the invention relates to a method for separating boron and iron from boron ore, and preparing sodium meta / perborate, borax, and boric acid and high-grade iron ore concentrates. Background technique [0002] Boron ore is mainly used to produce various compounds of borax, boric acid and boron. my country's boron ore resources have a complex structure, many paragenetic minerals, difficult processing, and high production costs. They are mainly distributed in four provinces: Liaoning, Jilin, Qinghai, and Tibet. Liaoning boron ore resources are mainly distributed in Fengcheng, Kuandian, and Dashiqiao. area, mainly boronite ore and boronite. Liaoning Wengquangou Ferroboron Mine is one of the super-large boron deposits in the world, and its proven B 2 o 3 The reserv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/12C01B35/12C01B35/10C01B15/12
CPCY02P10/20
Inventor 张亦飞秦士跃张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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