JPH0762182B2 - Treatment method for recovering nickel and magnesium from natural metal - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a treatment method for recovering nickel and magnesium from natural products.

[0002]

Various methods are known for hydrometallurgical treatment for extracting nickel from nickel bearing metal.
For example, U.S. Pat. No. 4,435,369 to Simpson describes a nickel bearing metal in an extraction vessel having an aqueous solution of a warm condensate of chloride ions, metal ions and sulfur acid. The method of putting is disclosed. The nickel recovery by this method is about 70 percent.

However, in this method, a specific substance,
That is, it requires sulfur acid, metal ions, and chloride ions, which is a cost problem, and nickel-bearing metal with a sufficiently high concentration of nickel must be used in order to be economically viable. There is a constraint.

Moreover, in the method disclosed in the above-mentioned US patent, magnesium must be added to the extraction tank in order to improve the recovery rate.

[0005]

Other methods by hydrometallurgy, which are studied in the above-mentioned U.S. patents, have a low recovery rate like the above method, and in order to be economically feasible, the nickel component in the nickel bearing metal is required. Has to be high enough.

Magnesium is also a metal to be additionally extracted in the process, rather than added in the process to improve nickel recovery.

[0007] Accordingly, a first technical object of the present invention, the top
Been made to the natural object and to provide a processing method for recovering both nickel and magnesium, reduces the cost of the recovery process containing components of nickel and magnesium for a very low such nickel and magnesium bearing metal And a method of recovering nickel and magnesium from natural metals.

A second technical object of the present invention is to reduce nickel and magnesium from natural metals which can be processed in a commercially viable manner even with metals having a low nickel and magnesium content due to the low cost of extraction. It is to provide a processing method for collecting.

On the other hand, hydrogen conversion of heavy oil (hydroco
nversion) treatment often results in the generation of spent catalysts which contain high sulfur content and which are mainly iron-based.
A typical iron-based catalyst used in this type of treatment is Ueda et al., U.S. Pat. No. 3,936,371, Aldridge.
e) U.S. Pat. No. 4,066,530, et al., U.S. Pat. No. 4,591,4 by Krasuk et al.
No. 26.

Therefore, it is desired to provide a method of using a treated iron-based catalyst that does not require a costly treatment to safely dispose of this type of substance.

Therefore, a third technical object of the present invention is to provide a treatment method for recovering nickel and magnesium from a natural metal which can effectively utilize a used hydrogen conversion catalyst in the recovery treatment of nickel and magnesium. is there.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a process for recovering nickel and magnesium from natural metals, which mainly comprises spent iron having at least 10 weight percent sulfur content. comprising: providing a catalyst to the steps of providing a natural metal with a nickel component of at least 0.1 weight percent magnesium component of at least 0.1% by weight, the catalyst before
Said catalyst for said natural metal by mixing with said natural metal
To obtain a mixture having a weight ratio of 1: 2 to 8: 1,
Water is added to the mixture to obtain a suspension having a pH of 4 or less, and the suspension is heated to 50 to 350 (° C.).
Together with 14.06 to 42.18 (kg / cm ² )
Pressurizing , the catalyst in the suspension,
Injecting nickel and magnesium into the solution from the natural metal by injecting the oxidant into the suspension in a ratio sufficient to maintain the natural metal and the oxidant in a substantially homogeneous distribution. The following processing method is obtained.

Standard or known techniques are used to extract nickel and magnesium from the solution.

The spent catalyst and natural metal are preferably powdered prior to treatment with an average particle size of less than 200 microns.

The preferred iron component in the spent catalyst is in the range of 20 to 70 percent by weight as Fe and the sulfur component is preferably at least 15 percent by weight.

[0016]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 illustrates several stages of the overall process for recovering nickel and magnesium from a raw ore according to an embodiment of the present invention.

Prior to the description, the preferred source of metal ions and sulfur is a sulfur-containing iron-based hydrogen conversion catalyst (S1 in FIG. 1). This catalyst is preferably mainly composed of iron in the range of 20 to 70% by weight as Fe. The spent catalyst preferably contains a sulfur component in the range of 10-40 percent.

Prior to use, the spent catalyst is preferably powdered with an average particle size of less than 200 microns to ensure good reaction during the contacting process.

The metal to be treated may be a nickel and magnesium bearing metal ore such as serpentine or olivine (S2 in FIG. 1). The metal ore contains at least 0.1 weight percent nickel component and at least 0.
Those with 1 weight percent magnesium component are preferred. The preferred components of nickel and magnesium are 0.1 to 10.0 weight percent and 0.1%, respectively.
1 to 30 weight percent.

Prior to mixing with the used catalyst, the natural metal is preferably ground to an average particle size of less than 200 microns to ensure a good reaction with the used catalyst during the catalytic treatment. Then spent catalyst and natural metal
Weight ratio of used catalyst to natural metal 1: 2 to 8:
It is mixed with the solid mixture in the range of 1 (S3 in FIG. 1). This mixing ratio is more preferably in the range of 1: 1 to 5: 1. From such a ratio, it was confirmed that the recovery rate of nickel and magnesium according to the embodiment of the present invention exceeds the recovery rate of the conventional method. This solid mixture is then added with an aqueous solution (S1 in FIG. 1) to form a condensate with a pH not greater than 4 (S5 in FIG. 1).
4). At pH higher than 4, desired chemical reactions are inhibited and unwanted reactions occur during the contacting process.

The oxidant is added to the condensate under controlled conditions to avoid "boiling" of the particulate matter and water contained in the condensate (S6 in FIG. 1). Such "boiling" causes a loss of either particulate matter or water, which has the opposite effect in the catalytic treatment and the variation of the pH of the reaction medium.

Further, the oxidant input ratio should be sufficient to maintain substantial homogeneity between the spent catalyst, the natural metal, and the oxidant. During this reaction, the temperature is warmed in the range of 50 to 350 ° C., and the pressure is 14.06 to 42.18 (Kg / cm ² ) (200 to
Pressurized in the range of 600 psi). The preferred ranges of temperature and pressure are 150 to 300 ° C. and 21.19, respectively.
^{~31.15 (Kg / cm 2) (} 300~500ps
i).

While the mixture is under such warming and pressure, iron is replaced by nickel and magnesium. As a result, nickel and magnesium are dissolved in the solution (S7 in FIG. 1). These nickel and magnesium are removed from the solution by standard methods well known in the art. By such a method, the expected recovery from natural metals is higher than 85 percent for nickel and higher than 90 percent for magnesium.

The oxidant used in the present treatment method may be oxygen, air, or a mixture of the two.

The metals to be treated in this treatment method are shown in Table 1 below.

[0027]

[Table 1]

The components shown in Table 1 are typically found in silicates such as olivine, quincerite, pyroxene, amphibole, kaolinite, serpentine, clay, and aluminates. It

A representative method according to an embodiment of the present invention is shown in the following example.

In the present example, natural iron metal was used as the spent catalyst, which was used in the hydroconversion process of heavy oil. The chemical composition of this used catalyst is given in Table 2 below.

A serpentine-type nickel and magnesium-containing laterite ore ore is found in Loma de de Hierer in Western Venezuela.
o) Obtained from the reservoir.
Its chemical composition is also shown in Table 2 below.

[0032]

[Table 2]

Several mixtures of this spent catalyst and raw metal ore are prepared and processed by the method described above. These samples are prepared with varying values of catalyst to raw ore ratio, as shown in Table 3 below.

[0034]

[Table 3]

At a 0: 1 ratio of catalyst to ore, the nickel and magnesium extraction was 0 percent. Furthermore, it is clear that increasing the ratio of catalyst to ore from 2: 1 to 4: 1 also increases the recovery of nickel and magnesium. In particular, nickel was extracted at a rate of 87.3 percent and magnesium at a rate of 92 percent at a catalyst to original ore ratio of 4: 1.

It is clear that such a comparison is superior to the recoveries by the methods disclosed in the prior art, and the sources of iron and sulfur are specially purchased for processing. The other desirable result was that the spent catalyst was discarded rather than material, and magnesium was extracted rather than added and the extraction rate was greatly improved.

The present invention may be utilized in various other forms or in other ways without departing from its basic features. The described embodiments are not all of the present invention and are not limited to this, and the present invention can be variously modified within the scope of the claims.

[0038]

As described above, according to the present invention, both nickel and magnesium can be recovered from a natural product at a low cost by using a used catalyst.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a processing method according to the present invention.

Continued Front Page (72) Inventor Carlos Seaton Venezuela, Caracas, Apt. 10-Be, Carre 2 La Urbina Ediff. Les. 13 (72) Inventor Juan Urtado Venezuela, EDF. Semcia, Armadas Sokoluro Asan Ramone, Avie. Ferzas (No address) (56) Reference JP-A-56-134505 (JP, A)

Claims (7)

[Claims] 1. A process for recovering nickel and magnesium from natural metals, comprising providing a spent iron-based catalyst having a sulfur content of at least 10 weight percent, and at least 0.1 weight percent. magnesium components and the steps of providing a natural metal and at least 0.1 weight percent of nickel component, versus the natural metal by mixing the natural metal and the catalyst
To obtain a mixture in which the weight ratio of said catalyst to be 1: 2 to 8: 1
A step of adding water to the mixture to obtain a suspension having a pH of 4 or less; and heating the suspension to 50 to 350 (° C.),
From 14.06 to 42.18 and (kg / cm ²⁾ to pressurize scan <br/> step, the catalyst in said suspension, the natural metal, and to maintain a substantially homogeneous distribution of the oxidant Injecting oxidant into the suspension at a sufficient ratio to extract nickel and magnesium from the natural metal into a solution, the method for extracting nickel and magnesium from natural metal. 2. The process for recovering nickel and magnesium from a natural metal according to claim 1, wherein the catalyst has 1 to 90 weight percent of Fe ₂ O ₃ , and the nickel and magnesium from the natural metal. A processing method for collecting. 3. A processing method for recovering nickel and magnesium from natural metal according to claim 1, the processing method of the sulfur component is at least 15% by weight, to recover nickel and magnesium from a natural metal, characterized in that . 4. The method for recovering nickel and magnesium from a natural metal according to claim 1, further comprising the step of pulverizing the catalyst and the natural metal into powders having an average particle size of 200 microns or less. A method for recovering nickel and magnesium from a natural metal. 5. The method for recovering nickel and magnesium from a natural metal according to claim 1, wherein the ratio of the catalyst to the natural metal is within the range of 1: 1 to 5: 1. A treatment method for recovering nickel and magnesium from a natural metal. 6. The processing method for recovering nickel and magnesium from a natural metal according to claim 1 , wherein in the step of performing heating and pressurizing, the suspension liquid is used.
Is heated to 150 to 300 (° C.) and 21.1
9 to 31.15 (Kg / cm ² ) [300 to 500 (p
Si)] is pressurized, and a treatment method for recovering nickel and magnesium from a natural metal. 7. A processing method of a natural metal according to claim 1, wherein the recovery of nickel and magnesium, the oxidant, natural metal, wherein air is selected from oxygen or the group consisting of the mixture, that Method for recovering nickel and magnesium from steel.