Gallium metal is mostly a by-product of alumina production, and the use of resin adsorption to enrich and recover trace dispersed gallium from the seed denominator of alumina produced by Bayer method, the method is simple, gallium extraction has no obvious effect on the mother liquor except gallium element, and the returned mother liquor will not have a negative impact on the production of alumina. The resin adsorption gallium process is usually fixed bed method and dense moving bed method.
1. Introduction to gallium resin
LH-800 gallium absorbent resin is a chelating resin with a coamidoxime functional group containing one
Chelated resin of a complex of =NOH and another active group such as -NH2, -OH, -SH, or =NOH.
2. LH-800 gallium absorbing resin main technology index
Index name Index
Appearance Large-porous yellow opaque spherical particles
Skeleton styrene system
Active group with aminooxime group
Moisture content % 50~60
Working exchange capacity g/L ≥2.5
Particle size range mm 0.45~1.25mm
Specific surface area m2/g ≥65
孔容 ml/g 0.1~0.3
Penetration ball rate % ≥90

3. Use the operation process
During the slow carbonation of the gallium-containing cyclic caustic solution, about 90% of Al2O3 is converted to Al(OH)3
precipitation, and most of the gallium must be retained in the solution, and the circulating caustic alkali solution of Al(OH)3 after separation is in
Thorough carbonation decomposition is carried out, and the crystallization of Al(OH)3 in the solution is precipitated, while most of the gallium and a small part of aluminum are precipitated
It is retained in the solution, and the solution is adsorbed by the gallium resin to further purify the gallium.
1. Adsorption The adsorption stock solution is generated by passing through the adsorption tower from bottom to top, and the solution resin layer at the inlet is supported
20cm water cushion. The adsorption temperature is 30~40°C, and the adsorption flow rate is 3m/h.
The solution flows upward in a piston shape between the resin voids, and the resin is gradually saturated from the bottom of the tower to the bottom of the tower
After the resin of the part is saturated, close the inlet valve, open the resin discharge valve, and discharge the saturated resin into the metering tank
When the volume reaches the predetermined value, the resin discharge valve is closed, and the discharged resin volume is replenished by the top of the tower.
2. Saturated washing The discharged saturated resin is manually added to the leaching tower from the top of the saturation tower, and after 10 minutes, it is stopped
Open the inlet valve. After the resin is adsorbed and saturated, it needs to be washed, that is, a large amount of the resin is adsorbed with water
washing operation.
3. Rinse After full washing, the resin enters the rinse tower and rinses the crushed resin with water.
4. Analysis After rinsing, transfer the resin to the analysis tower and use an alkaline sodium sulfide solution (generally sulfurized
The sub-control is about 20g/L, and the OH root ion is controlled at about 20g/L) to regenerate the resin.
5. Regeneration is generally used to increase the gallium concentration of regeneration liquid by 4 columns in series, and the regeneration flow rate is generally 1.5BV/h left
Right, the dosage of a single column of regenerator is about 2BV;
6. After regeneration, the resin is washed with water and rinsed until it is free of sodium sulfide.
7. Transformation Use 2~3BV2~4% dilute lye solution to transform through resin at 1 BV/h, and then pour it with water
Wash until the pH is 9~11, and then enter the adsorption section.

4. Storage of resin
1. The unused resin should keep the outer packaging bag intact to avoid its rupture and direct exposure of the resin to the empty
and stored in an environment of 0~40°C.
2. Resins that are suspended in use should avoid the following situations:
(1). Dehydration The equipment should be filled with water, and if the water must be drained, the equipment must be sealed to prevent the resin water from dispersing
Go.
(2). Freezing In case of sub-zero temperature, the equipment must be filled with salt water to soak the resin.

five: Package description:
Net weight: 25kg/bag, plastic bag.