JPS6019027A - Method for dissolving hardly soluble powder - Google Patents

Abstract

PURPOSE:To dissolve a substance to be dissolved remaining to a filter, in a method wherein a suspension having a hardly soluble substance to be dissolved suspended therein is supplied to a tank through the filter to use the solution of the tank, by recirculating a part of the solution to the filter. CONSTITUTION:A hardly soluble substance to be dissolved (e.g., NiCO3) is suspended in a mixing tank 10 and the resulting suspension is supplied to a tank 12 through a filter 11 while the filtered suspension stored in the tank 12 is sent to an electrolytic cell 13 by a pump 14 to perform plating. A part of said plating liquid is again supplied to the filter 11 by an arranged pipe 20 and the undissolved hardly soluble substance to be dissolved remaining to the filter 11 is dissolved to be introduced into the tank 12. That is, because the undissolved hardly soluble substance to be dissolved can be perfectly dissolved by supplying a part of the plating liquid to the filter from the tank while holding the plating liquid to a normal composition, this inventive industrial effect is large.

Description

[Detailed description of the invention] The present invention relates to a method for dissolving soluble powder.

In general, when dissolving a Kushi-1 soluble powder, (1) the composition of the dissolving solution is changed so that the substance to be dissolved is easily dissolved; (2
) A frequently used powder is made into a suspension to shorten the dissolution time as much as possible, and then the undissolved powder is precipitated or filtered to obtain a /8 liquid. , I'j・ measures have been taken care of.

However, since the method (1) requires changing the composition of the liquid itself, it is generally not possible to obtain a solution that meets the purpose, and it is often not effective as a countermeasure.

In addition, in method (2), the contact area between the powder and the liquid is large, making it possible to increase the contact area between the powder and the liquid. Create a cloudy liquid, stir it with a blade, etc.
Since it is dissolved while stirring, a large-capacity dissolution tank is required. In addition, a large-scale sedimentation device is required to sediment the excess undissolved powder, and even if it is filtered with a filter, it is difficult to process the useful excess undissolved powder that is trapped in the filter medium. It is difficult to play.

The present invention solves the problem mentioned in 1. The gist of the present invention is to supply a solution in which a poorly soluble substance is prepared with Ta to a tank through a filter, and to use the solution in the tank. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is described below with reference to the drawings.

FIG. 2 is an explanatory diagram of the present invention. In the figure, the mixing tank JO
The hardly soluble powder, for example, a solution of N](K)3, supplied is stirred by a stirring blade 18. It is preferable that the mixing tank be a large tank for stirring and dissolving NiCO3 and for precipitating undissolved components. According to experiments, the former C03 solubility curve is shown in Figure 1, and the dissolution time is less than 30 minutes.

The pH-adjusted plating solution is supplied to the filter 11 via the pump 19, filtered through a generally known reverse sushi filter 1, and stored in the circulation tank J2. The electrolytic cell 13 is provided with an electrode 15, a guide roller] 7, and a soaking roller 16 that allows four people to move the skin.
6. Ni plating is performed on ;
According to the plating control rule A'1, the plating solution is supplied from the circulation tank 12 by the pump 14.

In the present invention, undissolved NiCO3 remaining in the filter is dissolved by supplying a portion of the plating 7 (part of 'Z to the reverse/stop filter 1 by the reporter 20) and introduced into the circulation tank. Since the solution in the circulation tank has a relatively low Nl concentration, it remains in the Noilter (j Nj, C0
3 is also easy to dissolve. The above-mentioned inverted 6L type filter is practical for dissolving the plating solution. This ultimately leaves the filter with only a small amount of undissolved N i ! Since there is no residue left, and because it is a small number, it can be easily returned to the f contamination tank with the first 151L.

-1 When using the present invention, is plating ytM one layer? 1)
By supplying a portion of the plating solution from the circulation tank to a filter made with a specific composition, the undissolved NiCO3 is completely dissolved, and the commercial effect is positive.

[Brief explanation of drawings]

? The r-th diagram is a PJiCO3 solubility curve diagram, and Figure 2 is an explanatory diagram without showing the filter 7- of the present invention.
Circulation tank 13: Electrolytic cell

Claims (1)

[Claims] The liquid in which the poorly soluble physical property is suspended is passed through a filter,
1. A method for dissolving solid solution powder in a filtrate, the method comprising supplying the solution to a tank and using the solution in the tank, wherein a part of the solution is circulated from the tank to a filter to dissolve any soluble substances.