Nickel base superalloy has high temperature strength, good resistance to oxidation and corrosion resistance, are widely used in aerospace engines and parts manufacturing, nuclear power generation, petrochemical industry, etc.
For waste processing problem of nickel-based superalloy it earlier studies on recycled recycling abroad, has established a relatively perfect system of recycling.
And the domestic waste most of nickel-based superalloy was demoted piled up use, a small amount of recycled regenerate.
Through a lot of experiments, found that the waste heat in solvent extraction from nickel and cobalt alloy solution to remove calcium and magnesium plasma effect is remarkable.
in the process of operation, first choose P204 as extractant, kerosene as diluent, pickle liquor containing nickel and cobalt alloy slag with P204 extraction agent according to certain proportion into the centrifugal extraction machine, with the aid of the rotation of the drum, through the impeller the two-phase mixing and dispersing quickly, and complete the mixing and mass transfer process.
After mixing liquid under the action of vortex disk into the rotary drum, in under the action of centrifugal force, two phase fluid fast separation and through different export eduction body, to complete the two phase separation process.
In the separation, the single-stage and multistage extraction respectively in addition to calcium.
Also need to observe water pH, compared, organic phase saponification ratio, extraction time and temperature on the influence of calcium removal rate, to determine the suitable extraction conditions.
the pH of the water phase 1, the effect of calcium ion extraction separation
with higher water pH, calcium ion extraction rate increased;
Water pH = 5, calcium ion extraction rate effect is good, so the material liquid pH to control in 5.
0 ~ 5.
5 range is relatively appropriate.
2, compared to the effect of calcium ion extraction separation
with the increase of compared, the calcium ions increase extraction rate is bigger, determined by repeated experiments, the extraction compared with 1:2 advisable.
3, organic phase saponification rate has the effects of calcium ion extraction separation
after using saponification organic phase extraction separation of metal ions, calcium ions extraction rate greatly increased;
When organic phase saponification rate of 35%, calcium ion extraction efficiency is very high, so it is advisable to determine organic phase saponification rate 35%.
4, extraction time on the influence of the calcium ion extraction separation
extraction time have less effect on the calcium ion extraction rate, but combined with the experimental data showed that extraction time with 3 minutes advisable.
5, the influence of the temperature of calcium ion extraction separation
temperature also had little effect on calcium ion extraction rate can be according to the normal room temperature, but the concrete temperature control in 25 ℃ is most appropriate.
the place on put together is narrated, pickle liquor containing nickel and cobalt alloy slag removal calcium ions with P204 + kerosene for extracting organic phase can be deep removal of calcium ions.
The. cwl -
M series centrifugal extraction machine operation technological process is simple and obvious effects of removing impurity, low running cost, can be used for containing nickel and cobalt alloy scrap recycling use.
related extraction equipment figure:
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