Method for adsorbing chromium and iron ions in industrial ferrochrome ore liquid through ion exchanging resin.

A technology of ion exchange resin and cation exchange, which is applied in the field of adsorbing chromium iron ions and iron ions in industrial chromite liquid, using ion exchange resin to adsorb chromium in industrial chromite liquid, and the treatment field of industrial chromite liquid, which can solve the problem. The adsorption of chromite liquid has not seen reports and other problems

Inactive Publication Date: 2018-03-23
LANZHOU CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorption of chromite solution dissolved in sulfur-phosphorus mixed acid under strong acid conditions has not been reported yet.

Method used

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  • Method for adsorbing chromium and iron ions in industrial ferrochrome ore liquid through ion exchanging resin.
  • Method for adsorbing chromium and iron ions in industrial ferrochrome ore liquid through ion exchanging resin.
  • Method for adsorbing chromium and iron ions in industrial ferrochrome ore liquid through ion exchanging resin.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Industrial chromite liquid: simulated industrial chromite liquid prepared by selective acid solution, in which the concentration of chromium ion is 13.28 mg / mL, and the concentration of iron ion is 13.05 mg / mL.

[0038]Adsorption of chromium and iron: put 35g of resin (001×7 cation exchange resin) in a 250 mL Erlenmeyer flask, and then add 25 mL of chromite solution. Shake at room temperature (130 r min -1 ) for 45 min, and after reaching adsorption equilibrium, the obtained solution was centrifuged at 8000 rpm, and the contents of chromium and iron ions in the filtrate were determined to be 8.20 mg / mL and 9.76 mg / mL, respectively.

[0039] Elution of chromium and iron: desorption after resin adsorption reaches saturation. Weigh 20g of saturated resin and use 30mL of 10% ammonium sulfate solution as the eluent. -1 Oscillate at a constant temperature shaker for 2 hours, collect the eluent, and measure the contents of chromium and iron ions in the solution to be 1.42 mg...

Embodiment 2

[0041] Industrial chromite liquid: simulated industrial chromite liquid prepared by selective acid solution, in which the concentration of chromium ion is 13.28 mg / mL, and the concentration of iron ion is 13.05 mg / mL.

[0042] Adsorption of chromium and iron: put 70g of resin (001×7 cation exchange resin) in a 250 mL Erlenmeyer flask, and then add 50 mL of chromite solution. Shake at room temperature (120 r min -1 ) for 45 min, and after reaching adsorption equilibrium, the obtained solution was centrifuged at 6000 rpm, and the contents of chromium and iron ions in the filtrate were determined to be 9.47 mg / mL and 9.56 mg / mL, respectively.

[0043] Elution of chromium and iron: desorption after resin adsorption reaches saturation. Weigh 20g of saturated resin and use 30mL of 10% ammonium sulfate solution as the eluent. -1 Oscillate at a constant temperature shaker for 2 hours, collect the eluate, and measure the contents of chromium and iron ions in the solution to be 0.92 m...

Embodiment 3

[0045] Industrial chromite liquid: choose acid-soluble industrial chromite liquid, in which the concentration of chromium ion is 13.28 mg / mL, and the concentration of iron ion is 13.05 mg / mL.

[0046] Adsorption of chromium and iron: put 35g of resin (001×7 cation exchange resin) in a 500 mL Erlenmeyer flask, and then add 25 mL of chromite solution. Shake at room temperature (100 r min -1 ) for 45 min, and after reaching adsorption equilibrium, the obtained solution was centrifuged at 7000 rpm, and the contents of chromium and iron ions in the filtrate were determined to be 8.99 mg / mL and 9.70 mg / mL, respectively.

[0047] Elution of chromium and iron: desorption after resin adsorption reaches saturation. Weigh 20 g of saturated resin, use 30 mL of pure water as eluent, -1 Oscillate at a constant temperature shaker for 2 hours, collect the eluent, and measure the contents of chromium and iron ions in the solution to be 0.99 mg / mL and 0.70 mg / mL, respectively. It can be calc...

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Abstract

The invention provides a method for adsorbing chromium and iron ions in industrial ferrochrome ore liquid through ion exchanging resin. 001x7 cation exchange resin is added into the industrial ferrochrome ore liquid, and constant temperature oscillation adsorption is performed at room temperature; centrifugal separation is performed after adsorption balance; and saturated resin uses an ammonium sulphate solution with the mass fraction being 5%-10% or water as eluant, constant temperature oscillation elution is performed at room temperature till balance is achieved, and the eluant is collected.An experiment shows that the method for adsorbing the chromium and iron ions in the industrial ferrochrome ore liquid through the ion exchanging resin can achieve high adsorption of the chromium andiron ions in the simulated industrial ferrochrome waste liquid, and a good elution effect is achieved. Thus, the method can be used for recycling of the chromium and iron ions in the industrial ferrochrome ore liquid.

Description

technical field [0001] The invention relates to a method for adsorbing ferrochromium ions in industrial chromite ore liquid, in particular to a method for adsorbing chromium and iron ions in industrial chromite ore by ion exchange resin, which is mainly used for the treatment of industrial chromite ore liquid and belongs to chromium Iron ore processing technology field. Background technique [0002] Chromite is an oxide mineral containing chromium and iron, and it is also the only natural raw material for producing various chromium compounds. It is quite hard, black and semi-metallic, generally in the form of lumps or granular aggregates. Chromite The chemical composition of chromite is FeCr 2 o 4 , the crystal is an oxide mineral in the equiaxed crystal system. Cr 2 o 3 The content is 67.91%, which is the main source of industrial chromium. Due to its good electronic layer structure, chromium has special industrial application value, and it is widely used in fur tann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/42C22B34/32
CPCC22B3/42C22B34/32Y02P10/20
Inventor 常国华汪启瑞陈映全孙海丽
Owner LANZHOU CITY UNIV
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