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A scheelite, low-grade technology, used in flotation, solid separation and other directions, can solve the problems of poor ore adaptability, high beneficiation cost, poor separation effect, etc., to avoid the loss of scheelite and ensure the recovery rate. , the effect of reducing consumption
Active Publication Date: 2016-02-17
ZIJIN MINING GROUP
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The thick slurry high temperature method is also called "Petrov method" for flotation, which is to first concentrate the coarse scheelite concentrate containing calcite and fluorite, then add a large amount of water glass, and carry out the process at a high temperature above 80°C for 30 to 60 minutes. It has strong adaptability to ore, and the selection index is stable, but there are deficiencies such as the need for additional heating auxiliary equipment, high beneficiation costs, and poor working conditions; the normal temperature flotation method mainly emphasizes The synergistic effect of sodium carbonate and water glass, under the condition of adding a large amount of water glass, scheelite crude concentrate is diluted and concentrated after a long time (>30min) of strong stirring, although this method avoids many inconveniences of the thick slurry high temperature method , the cost of beneficiation is low, but there are deficiencies such as poor adaptability to ore and poor beneficiation effect
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Embodiment 1
[0037] Example 1: A certain tungsten mine in Yunnan Province is gneiss scheelite, WO 3 The grade is low, and the particle size of scheelite is unevenly distributed from medium to fine; the valuable metals and gangue minerals in the ore are complex, and there are many kinds of gangue minerals, such as apatite, calcite, fluorite and graphite. Easy access to tungsten roughing concentrate, increasing the difficulty of scheelite separation. Get different ore samples in this mining area and test, the ore used in embodiment 1 contains WO 3 0.22%, TS1.38%, organic carbon 0.56%;.
[0038] according to figure 1 Embodiment of the technological process of the present invention, after the raw ore is ground, add 25 g / t of kerosene dosage and 45 g / t of sulfide ore collector to the slurry that is ground to a qualified particle size to carry out the first sulfur roughing, and add 12 g of kerosene dosage / t and the amount of sulfide ore collector 22g / t for the second sulfur roughing, do not ...
Embodiment 2
[0039] Embodiment 2: the ore used contains WO 3 0.28%, TS1.42%, organic carbon 0.48%, implement according to the processing step and condition identical with embodiment 1.
[0040] The recovery indicators of the products of Embodiment 1 and Embodiment 2 of the present invention are shown in Table 1.
[0041] Table 1 embodiment of the present invention product recovery detection index
[0042]
[0043] Shown by embodiment 1, embodiment 2 results shown in table 1, obtainable productive rate is 0.24~0.31%, WO 3 The grade is 75.20~5.75%, WO 3 Scheelite concentrate with a recovery rate of 82.04-83.87% can also be obtained with a yield rate of 6.58-6.87%. WO 3 The grade is 0.19~0.22%, WO 3 The recovery rate is 5.17-5.93% sulfur concentrate.
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Abstract
The invention relates to a low-grade scheelite branch floating method. The low-grade scheelite branch floating method includes the following steps and conditions that carbon and sulfur flotation is carried out, namely, kerosene and sulphide ore collecting agents are added into ore pulp based on the weight of dry raw ore for two times of sulfur rougher flotation, and sulfur concentration is carried out on sulfur rough concentrate without any chemicals to obtain sulfur concentrate; scheelite branch rougher flotation is carried out, namely, sulfur rougher tailing pulp is fed into a distribution tank I and a distribution tank II and then evenly divided into a branch flow I and a branch flow II, sodium carbonate is added respectively to adjust the pH value of the ore pulp, modified sodium silicate and 731 oxidized paraffin soap are added, stirred and mixed into the pulp, then wolfram grab picking is carried out, the 731 oxidized paraffin soap is added into wolfram rougher tailings to carry out two times of wolfram rough scavenging, and then two times of wolfram rough concentration are carried out, so that scheelite rough concentrate and tailings are obtained; and scheelite normal-temperature concentration is carried out, namely, sodium carbonate is added into the scheelite rough concentrate to adjust the pH value of the ore pulp, then modified sodium silicate is added to carry out wolfram concentrate rougher flotation, the tailings obtained after wolfram concentrate rougher flotation are subjected to two times of wolfram concentrate scavenging, the tailings are separated out, then middlings obtained after wolfram concentrate rougher flotation are subjected to four times of wolfram concentrate scavenging, and scheelite scavenging concentrate is obtained. The low-grade scheelite branch floating method has the advantages of being short in process, easy to operate, high in adaptability, low in processing cost, good in dense settlement effect, easy to industrialize and the like, and is suitable for floating application of low-grade scheelite.
Description
technical field [0001] The invention relates to a beneficiation method, in particular to a low-grade scheelite branch flotation method, which is suitable for low-grade scheelite flotation applications. Background technique [0002] The basic reserves of scheelite account for 70.4% of China's basic tungsten reserves, but 81.1% of the ore WO 3 Grade less than 0.4% belongs to low-grade scheelite. Due to the complex components of low-grade scheelite, low-grade or associated with other metals, and difficulty in development and utilization, most low-grade scheelite is difficult to recycle, plus. In general, scheelite ore whose gangue is mainly quartz or silicate minerals is relatively easy to choose, while scheelite-calcite and scheelite-fluorite (barite) ore are different due to the similar buoyancy of minerals. It is more difficult to sort, and the scheelite rough concentrate still contains a large amount of fine-grained gangue minerals such as calcite and fluorite. After thes...
Claims
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