JPS59160558A - Flotation process of complex sulfide ore - Google Patents

Abstract

PURPOSE:To depress selectively zinc ore in the separation of complex sulfide ore by flotation and to perfom separation effectively, by performing conditioning by adding lignin sulfonic acid or a salt thereof. CONSTITUTION:Flotation is performed after executing conditioning in the differential flotation of a complex sulfide ore contg. Cu, Pb, Zn or Fe, etc. by adding lignin sulfonic acid or a salt thereof. Thus, zinc ore contained in the oxidized ore is selectively depressed effectively. In this way, the concentrate of copper and lead are separated as float, and zinc, iron and gangue, etc. are separated as sink. The recovery for copper and lead are improved and the recovery for zinc is improved also to a large extent.

Description

Detailed Description of the Invention The present invention uses lignin sulfonic acid or its salt to separate copper and lead mixed minerals by flotation in the separation of complex sulfide ores containing sulfides such as copper, lead, and zinc. as floating ore,
On the other hand, it relates to a flotation method that can effectively separate sulfides such as zinc and iron and gangue as precipitates.

When separating complex sulfide ores containing copper, lead, zinc, iron, etc. by flotation, the steel and lead minerals are floated, the zinc, iron, and gangue minerals are suppressed to become precipitated ore, and then the copper, lead, etc. The mixed concentrate is separated and flotated to produce individual concentrates, and zinc,
First, zinc concentrate and then iron sulfide concentrate are recovered as floating ore by flotation from the mixed ore containing iron and gangue.

In this case, if the suppression of zinc minerals is weak at the stage of obtaining the initial copper and lead mixed concentrate, the zinc minerals will float together with the copper and feed minerals, which will reduce the quality of the copper and lead mixed concentrate. At the same time, this results in a decrease in the actual zinc yield.

Cyanide compounds and sulfites are usually used as inhibitors for zinc minerals in copper and lead bulk flotation, but if the ore has been activated by copper ions due to oxidation, etc., zinc minerals can be inhibited. It is difficult to separate, and the separability deteriorates significantly, resulting in a decrease in concentrate grade and actual yield rate, and a decrease in profitability.
In some cases, the activated zinc minerals interfere with the separation of the minerals from each other, making separate recovery of each concentrate impossible, resulting in extremely low profitability.

Therefore, an effective method for suppressing zinc minerals contained in ores that have been particularly oxidized has been desired.

The present invention relates to a method for effectively and selectively suppressing zinc minerals contained in sulfide ores, particularly oxidized ores. They discovered that when ligninsulfonic acid or its salts are used together with a common zinc mineral inhibitor, the separation can be carried out very efficiently.

According to the method of the present invention, by flotation of complex sulfide ores accompanied by copper and lead minerals, the amount of zinc minerals mixed in copper and lead bulk concentrate is greatly reduced, and the actual yield of copper and lead is improved. The actual yield can also be significantly improved.

Examples of the present invention will be explained below along with comparative examples. Comparative Example 1 Chalcopyrite, galena, sphalerite, and pyrite collected from the upper part of a strongly oxidized ore deposit produced by ore A, as well as secondary production due to oxidation. Using copper indigo-containing ore, it was cooled in water to a particle size of about 50% -400 mesh, and sodium sulfide (Na2S) was added at a rate of 2 kg/t to the obtained mineral liquid for 10 minutes. After treatment, add sulfite solution to 2 Kg/t as in normal copper and lead bulk flotation.
The conditions were determined for 1 minute. Then adjust the pH to 6 with lime,
Table 1 shows the results of flotation for 14 minutes with the addition of 90 g/l of KL#234 (trade name of dithiophosphorus sansoda) as a scavenger and 20 g/l of 1 incense #125 (trade name) as a foaming agent. show.

(Left below) Comparative Example 2 The conditions such as the degree of cooling, addition of sulfurous acid, addition of sodium sulfide, etc. are the same as in Comparative Example 1, but in order to strengthen the suppression of zinc minerals, 20 g of sodium cyanide was added to the ore. Table 2 shows the results when added in different proportions (blank below). Example 1 For the above test, sodium salt of ligninsulfonic acid was first added to the mineral liquor of ground ore in the same manner as in Comparative Example 1. Table 3 shows the results of flotation under the same conditions as in Comparative Example 1 after conditioning was performed for 3 minutes by adding 200 g/' of certain sodium ligninsulfonate at a ratio of ore.

(Leaving space below) Example 2 Using the same ore as in Comparative Example 2, first adding t00 g of lignin sulfone/calcium to the ore milled in the same manner as in Comparative Example 1 at a ratio of 100 g/ore, and stirring for 3 minutes. After conditioning, flotation was carried out under the same conditions as in Comparative Example 1. The results are shown in Table 4.

(Left below) As is clear from the above results, in the case of Comparative Example 1,
The suppression of zinc minerals is insufficient, and the floating rate of zinc minerals up to No. 370 (floating ores 1 to 3) is almost equal to that of copper and lead minerals, and the separation between Cu, Pb and Zn is not well achieved. Further, in Comparative Example 2 in which sodium cyanide was used in combination, the suppression of zinc minerals was only slightly strengthened, but the minerals still tend to float, and the floating minerals become bulk concentrates of copper, lead, and zinc.

In contrast, in Examples 1 and 2 of the present invention, the separation between Cu, Pb, and Zn was significantly improved, and the results were good even when applied to copper and lead bulk flotation of highly oxidized and difficult-to-treat ores. It was confirmed that high-grade concentrate was recovered by flotation and that most of the gangue was transferred to the sedimentation side.

As described above, the method of the present invention extremely effectively suppresses the floating of zinc minerals and produces high-grade copper and
This makes it possible to recover lead mixed concentrate without the risk of causing pollution, and it can also be used as copper, lead concentrate, zinc, etc. in the next process.
Separation of iron sulfide concentrate can also be facilitated.

Patent applicant: Dowa Mining Co., Ltd. Procedural amendment 1) September 7, 1980 Director of the Patent Office Mr. Wakasugi-fu 1, Indication of the case Patent application No. 1983-32839 2, Name of the invention Floating complex sulfide ore Mineral processing law 3, relationship with the case of the person making the amendment Patent applicant name Dowa Mining Co., Ltd. 4, "Detailed explanation of the invention" column 6 of the agent's specification, content of the amendment (1) Specification, page 4, line 9 The text that says ``Conditioning'' is corrected to ``Conditioning.''

(2) “Dithiophosphorus sansoda” on page 4, line 11 of the specification
Correct the statement to ``sodium dibutyl dithiophosphate.''

(3) On page 4, line 12 of the specification, "foaming agent j" is corrected to "foaming agent."

(4) In Table 1, page 5 of the specification, the numerical value of the Cu distribution ratio of the deposited ore is "38..9".
The pb grade value of 2 is r25.20 J.
．． 3 (l J and the Zn grade value of the floating ore l~2 are r2
B, 92 J is corrected to 126.82 J.

(5) The numerical value of the Gu grade of floating ore 1 in Table 2 on page 7 of the specification is r5.81J. oIJ and the value of the Sp grade of the same precipitate is r4.64J, respectively, are corrected to ra,,e5.

that's all

Claims (2)

[Claims] (1) When carrying out preferential flotation of complex sulfide ores containing copper, lead, zinc, iron, etc., after conditioning by adding ligconosulfonic acid or its salts, flotation is carried out to remove copper and lead concentrates. A method for flotation of complex sulfide ores, which is characterized by separating zinc, iron, gangue, etc. as precipitates from floating ores. (2) The preferential flotation method for complex sulfide ores according to claim 1, wherein the ligninsulfonate is sodium ligninsulfonate or calcium ligninsulfonate.