JPS5992045A - Flotation of nonsulfide mineral - Google Patents

Abstract

PURPOSE:To selectively collect nonsulfide minerals with a collector while suppressing sulfide minerals, by performing the titled flotation using thiourea and optionally a metal or thier complex compound. CONSTITUTION:This invention relates to a flotation method for selectively separating nonsulfide minerals from refining copper-contg. residue and has the feature to use thiourea and optionally a metal compound or their complex compound as a conditioning agent for the flotation. The objective nonsulfide minerals are recovered as a floated portion (c) directly from a raw material (a) itself in the flotation step, while sulfide minerals and gangue are separated as a precipitating part (d). Hence, the grades of Au, Ag and Cu in the obtd. nonsulfide minerals are low, but the grade of Pb is high. Since the state of a Cu mineral is generally CuS or Cu2S accompanied by Au and Ag, the separability of the nonsulfide minerals from the sulfide minerals is remarkably improved as compared to a conventional method.

Description

[Detailed Description of the Invention] G) Technical Field The present invention relates to a method for selectively flotating non-sulfide minerals in a smelted copper-containing residue, and in particular, it relates to a method for selectively flotating non-sulfide minerals in a smelting copper-containing residue. It is characterized by using a metal compound or a complex compound of both.

(B) Background Art In general, complex minerals such as black ore contain a mixture of sulfide minerals and non-sulfide minerals such as barite.

Conventionally, when collecting non-sulfide minerals such as barite using the flotation method, the precipitate after the sulfide minerals are separated and recovered by sulfide flotation, that is, the non-sulfide minerals such as barite are concentrated. Flotation of non-sulfide minerals (barite flotation) for sedimentation
If the quality of non-sulfide minerals is strongly desired, there is also a method in which an excess amount of scavenger is used to enhance the flotation of the sulfide minerals.

In addition, the applicant's proposal is based on the Tokukosho! 2-21.0/
As explained in detail in the publication, there is also a method of desulfurizing and flotating sulfide minerals in the presence of hydrogen sulfide to collect non-sulfide minerals.

However, in all of these methods, as shown in the flow sheet of Figure 1, raw materials are flotated, sulfide minerals are first separated as floating ore, non-sulfide minerals are separated as settled ore, and then restored to the settled ore. On the other hand, by flotation using the above-mentioned methods, non-sulfide minerals were separated from gangue as floating ore.

(C) Disclosure of the Invention The present inventors were conducting intensive research into an economical and efficient treatment method in place of the conventional method described above, and discovered that thiourea and, if necessary, a metal compound (e.g., zinc salt such as zinc sulfate, aluminum sulfate, etc.) It has been found that when flotation is carried out using aluminum salts such as (aluminum salts, etc.) or a complex compound of both, sulfide minerals are suppressed and non-sulfide gold minerals can be selectively collected using a scavenger.

That is, the present invention provides a processing method that allows the target non-sulfide mineral to be converted into floating ore and the sulfide mineral and gangue to be separated as precipitate in a direct flotation process from the raw material itself.

As a method of flotation using thiourea and a metal compound, or a complex compound of both, there is a method proposed by the present applicant called Tokkosho! r7
-4! ; ♂ Publication No. 3 and JP-A No. 7-3 Otsuri 57
However, all of these are aimed at flotation separation of sulfide minerals, especially preferentially floating lead minerals mainly composed of galena, and the present invention focuses on the mechanism and target object. are different.

) Comparative Example: Copper-containing residue (pulp concentration/j%) of mine A was used as the raw material, KL+, 27≠ (trade name of sodium dithiophosphate) 7009-/l was used as the scavenger, and MIBC (
(trade name) 100 y/l was added to separate the fossil minerals as precipitated ore, and the floating ore was collected as copper concentrate. In addition, during this sulfide mineral flotation, rough selection → fine selection → cleaning selection was performed.

Next, the cleaning tailings (precipitated ore) is subjected to flotation of non-sulfide minerals (lead-halite ore, that is, molten minerals of Pb5o4 and Ba5o4), and lead-barite concentrate is added to the floating ore side. It was separated into gangue containing silicic acid etc. on the ore side. At this time, the flotation agent used as a scavenger was Duomin T (trade name with 3% N-alkyl trimethylene diamine component)! rO
Only f/l was used.

The results are shown in Table 1.

Below is a margin (e) Example Using the same raw materials as in the above comparative example, thiourea l/L0θ was used as a direct conditioning agent (inhibitor) as shown in the flow sheet of Figure 2.
At room temperature, p
H/,,! At S', non-sulfide minerals (lead-palite ore) were recovered as floating ore, and sulfide minerals and gangue were separated as sediment.

The results are shown in Table 2.

As can be seen by comparing the diagrams in the margins above, Au, Ag, and C in the non-sulfide mineral (lead-palite ore) obtained by the method of the present invention.
The u grade is low and the Pb grade is high.

Generally, the form of Cu minerals is CuS or Cu2S, and since Au*Ag is also associated with Cu minerals, the method of the present invention significantly improves the separation of sulfide minerals and non-sulfide minerals compared to conventional methods. I know that there is.

(f) Effects of the Invention As described above, the method of the present invention is a method for flotation recovery of non-sulfide minerals directly as floating ore, and is a new method that overturns the concept of conventional non-sulfide mineral processing. This has the advantage that operating costs can be greatly reduced by simplifying the processing system.

[Brief explanation of drawings]

Figure 1 shows 70 sheets of non-sulfide mineral flotation using the conventional method.
FIG. 2 is a 70-sheet of non-sulfide mineral flotation according to the method of the present invention. Figure 1 214

Claims (1)

[Claims] A method for flotation of non-sulfide minerals, characterized in that thiourea is used as an inhibitor of sulfide minerals in selectively flotating non-sulfide minerals.