DD233311A1 - COLLECTORS FOR THE FLOTATIVE RECOVERY OF TUNGSTEN MINERALS - Google Patents

Abstract

The invention relates to a collector for the flotative extraction of tungsten minerals from complex, tungsten-containing ores, in particular poor, difficult to treat, tungsten-containing ores with a variety of accompanying minerals. The invention aims to make the joint flotation of scheelite and wolframite possible and economical. This object is achieved in that the mineral suspension is a collector reagent characterized by a proportion of C17: 1 fatty acids of 25-40%, a proportion of C17 fatty acids of 30-50% in total and a proportion of unsaturated fatty acids of a total of 40-70%. 75% at a chain length of the fatty acid spectrum of 12-18 carbons. Its use is possible for the separate or combined flotative enrichment of tungsten ethers (scheelite and wolframite) under the usual flotation conditions for the recovery of these minerals in alkaline crops. The collector according to the invention can be prepared by known methods from microbial biomass obtained as a waste product in the cultivation of microorganisms on petroleum hydrocarbons.

Description

Vusführungsbeispiel

In the exemplary embodiment, the results for tungsten floatation of 3 different types of ore are compared between known collectors and the collector substance according to the invention.

^: for the flotation a scheelithaltiger Skarnerz with 0.23% WO3, a complex, scheelit-wolframithaltiges Skarnerz with), 24% WO ₃ (thereof 70% Scheelit and 30% tungstenite) and a tungsten-containing Skarnerz with 0.17% WO ₃ used.

The three types of ore contain different amounts of amphiboles, pyroxenes, fluorite, carbonates, silicates, quartz and clay minerals and are considered to be non-treatable. The overgrown ores require a pronounced ^: digestion.

The milling of the 3 types of ore is carried out under the same conditions in a wet-wire ball mill to 100% 100 ^ m.

After separation of magnetite by weak-field magnetic separation and sulphidic minerals, the tungsten-based products are floated from the product of the sulphide flotation under the following conditions:

Conditioning of the pulp in a 3I flotation machine at stirrer speeds of 1250 rpm " ¹ , in experiments with thermal suspension temperature increase to 80 ° C in a separate vessel in a water bath.

Reagents are added and conditioned in the following order:

VIa ₂ CO ₃ for pH adjustment to 10.2-10.410min

300 g Tij _z collector min 2.5 kg Tij _e.g. Na ₂ SiO 3 5 min (sodium oleate, Cordesin O, collector according to the invention as the sodium salt), 5 min, in experiments with heat conditioning of the slurry. ^60: eststoffgehalt the flotation pulp 400g Γ ¹

The flotation times are 15 min.

η Table 1 are the Grundflotationsergebnisse for the above-mentioned 3 types of ore with and without ^heating: lotationstrübe with the use of 2 different collectors as compared with the inventive collector jargestellt.

^: ÜR assessing the efficacy of the substance collectors of the invention over the conventional collectors vird of the effectiveness E (defined as the difference from WO ₃ -Ausbringen in the flotation concentrate and the mass yield ^of: lotationskonzentrates), the enrichment i and uses the spreading.

According to Table 1, it can be seen that the collector according to the invention has the highest efficiency E and the highest enrichment i of the investigated collectors for scheelite and / or tungstenite in the 3 investigated ore types with and without hot conditioning of the pulp to be solubilized.

Table 1

ore type collector effectiveness 8O ⁰ C WO ₃ range. i 8O ⁰ C WO ₃ output 8O ⁰ C 2O ⁰ C 54.77 43.42 66.83 2O ⁰ C 4,43 2,3 '8,0 2O ⁰ C 70.65 77.02 76.36 scheelithaltiges Skarnerz Sodium oleate Cordesin O according to the invention. 50.06 41.23 63.03 41.69 ^C 37.91 56.36 13.3 2.52 19.6 2.25 2.08 6.71 54.13 68.53 66.42 74.90 72.99 66.25 complex skeliver / olframithaltiges Skarnerz Sodium oleate Cordesin O according to the invention. S. 23.63 39.71 42.64 30.56 31.99 56.60 5.21 2.08 7.21 3.29 2.0 5.53 29.25 75.93 49.50 43.87 63.89 69.08 «Olfram-containing ikarnerz Sodium oleate Cordesin O according to the invention. 28.32 41.00 45.20 8,88 2,35 12,47 31.91 71.12 49.14

Claims (2)

- ι - / ι a cm claims: 1. Collector for the flotative extraction of tungsten minerals, characterized in that this proportion of C _17: -i-fatty acids of 25-40%, a proportion of (^ -fatty acids of 30-50% and a total of unsaturated fatty acids in total 40-75% at a chain length of the fatty acid spectrum of 12-18 carbon atoms, which can be prepared by known methods from microwave biomass obtained in the cultivation of microorganisms. 2. The method according to item 1, characterized in that this for the recovery of tungsten-containing concentrates of complex, previously not treatable skarn and other tungsten-containing ores, using conventional conditions (flotation for pH control and pressing the gait, Flotationstrübetemperaturen, solids contents and Flotation regime) can be used. Field of application of the invention The invention relates to a collector for the flotative recovery of tungsten minerals from complex, tungsten-containing ores, in particular poor, difficult to treat, tungsten-containing ores with a variety of accompanying minerals. Characteristic of the known technical solutions Finely intergrown Scheelite ores, the iron and sulfide minerals as well as rock minerals such as fluorite, garnet, calcite, hornblende, quartz, mica and others. a. are crushed until the required digestion of the useful minerals. With conventional methods, the separation of magnetic and sulphidic minerals. It is known that scheelite and tungstenite are obtained as a function of the ore characteristic after different enrichment processes, in particular flotation processes. Wolframite is predominantly obtained by the application of gravitational and high-strength magnetic field methods, sometimes also combined, less frequently by the use of hydroxamic acids, preferably from acidic pulp. The flotative recovery of scheelite is carried out from neutral to alkaline pulp when using fatty acids and / or their salts as a collector and alkalis, partly modified with heavy metal salts, as modifiers, which also works with heating of the pulp. These are the Petrov process (hot conditioning of thickened scheelite preconcentrates with flotation chemicals) (Petrov, NS, the flotation of scheelite from skarn ores, Naucno-techn. Inf. Bjullsten inst. -A., Mechanobr Leningrad, 1956,1 p -18), the hot conditioning of ore with flotation chemicals (OE PS 340340) and the direct Scheelitflotation without turbidity (Gräsberg, M .: Results of a new Scheelitflotationsprozesses, World Mining, San Francisco 32 (1979) 5, p.54-58). Internationally, fatty acids and / or their salts are partially blended, such as sodium oleate with hydrozonvaleric acid (SD PS 621382), oleic acid with naphthenic acid (US Pat. No. 4,054,442), combination of oleic acid, linoleic acid and tall oil (US Pat. No. 4,361,050), fatty acid, amidocarboxylic acid, phosphoric acid esters Combined with amidosulfonic acids (SE PS 429822), also sulfonates (US PS 4040519), tall oil separately and sarcosides (DD PS 254586) used. Disadvantage of the known technical solutions is that the efficiency of flotation for complex, difficult to treat, containing skarninters containing wood, the scheelite and tungstenite, is low and thereby high costs for the production of tungsten concentrates arise. The minerals Scheelit and Wolframit are obtained with different reagent regimes and types of flotation, Wolframit also by other enrichment processes; which means high costs for investment and operation of processing plants with complex ores. Object of the invention The aim of the invention is the use of a method for the common flotation of scheelite and tungstenite from complex, tungsten-containing, previously not treatable skarn ore with different scheelite and tungsten titanium parts with high efficiency of the process. Explanation of the essence of the invention The invention has for its object to provide an enrichment process for finely complex skelnerze, scheelit- and woiframhaltige. According to the invention, this object is achieved in that the flotative enrichment of scheelite and wolframite from complex, tungsten-containing ores, with amphiboles, pyroxenes, sulfides, fluorite, carbonates, silicates, quartz, magnetite, hematite u. a. by flotation, after separation of secondary Nutzermerale, such as magnetite and sulfides, using a new collector substance by known methods, the slurry is conditioned with alkaline reagents and foam-foam with further addition of modifications. In a method of the type mentioned, the invention consists in that a substance obtained from a waste product of microbial origin and chemicals known as modifiers have been used as the collector. The collector substance according to the invention, characterized by a proportion of Ci _7: i fatty acids of 25-40%, a proportion of ^ fatty acids total of 30-50% and a content of unsaturated fatty acids of 40-75% at a chain length of the fatty acid spectrum of 1 -18 carbon atoms can be prepared by known methods from microwave biomass obtained in the cultivation of microorganisms on petroleum hydrocarbons. The collector substance according to the invention can be emulsified (for example by addition of nonionic surfactants) or converted by hot conditioning with lyes and / or urea partially or completely into the salt form. When using the collector substance according to the invention, the following advantages are obtained over oleic acid and sarcosides: - For the preparation of the collector substance according to the invention may be used in the petroleum processing industry, the z. Currently being burnt, serve. The collector substance can be used for the joint or separate flotation of tungsten minerals (scheelite, wolframite) from difficult to treat, complex skarn and other tungsten-containing ores, and it results in better success ratios for the flotation against oleic acid and sarcosides, eg. B. for ore-containing ores of Erzgebirgian space, which previously considered not treatable.