Beneficiation method for mixed refractory tungsten ore
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A beneficiation method and tungsten ore technology, which is applied in the beneficiation field of mixed refractory tungsten ore, can solve the problem of low wolframite concentration recovery rate, low wolframite concentrate grade, difficult wolframite recovery, difficult wolframite activation, etc. question
Pending Publication Date: 2021-09-10
NORTHWEST RES INST OF MINING & METALLURGY INST
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Although heating and stirring flotation has also achieved good results in the concentration of scheelite in the rough concentrate, a large amount of water glass and sodium sulfide have been added in the process of heating and stirring flotation scheelite concentration,
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Embodiment 1
[0063] For a mixed black and white tungsten ore, the raw ore contains about 1.05% WO3, and the ratio of black and white tungsten ore is 2:4.5. The main metal minerals in the ore are wolframite and scheelite, followed by tungsten, magnetite, pyrrhotite, pyrite, and a small amount of molybdenite. The main gangue minerals are quartz, followed by fluorite and mica , plagioclase, chlorite, a small amount of wollastonite, apatite, etc. The tungsten minerals in the ore mainly exist in the form of wolframite and scheelite. The black and white tungsten ore available in the ore is uneven in particle size, which is closely related to the intercalation of gangue, the distribution is relatively scattered, and the intercalation state is complex, which is a relatively difficult ore to be separated. The test results are shown in Table 1.
[0064] The specific process is as follows:
[0065] ⑴ Grinding:
[0066] The crushed black and white tungsten ore raw ore and water are added to a ball...
Embodiment 2
[0085] A refractory mixed black and white tungsten ore in Xinjiang, the original ore contains WO 3 It is about 0.55%, and the ratio of black and white tungsten is 1:4.2. The main metal minerals in the ore are wolframite and scheelite, followed by tungsten, magnetite, pyrrhotite, chalcopyrite, specularite, pyrite, molybdenite, a small amount of cassiterite, ferro-titanium Mine and gangue minerals mainly include quartz and fluorite, followed by biotite, muscovite, plagioclase, kaolinite, chlorite, a small amount of epidote, pyrophyllite, etc. The test results are shown in Table 1.
[0086] The specific process is as follows:
[0087] ⑴ Grinding:
[0088]The crushed black and white tungsten ore raw ore and water are added to a ball mill at a mass ratio of 1:1 for grinding. In the ore grinder, the fineness of the grinding product is calculated based on the dry ore weight of the black and white tungsten raw ore. The degree is -74μm, which accounts for 75%, and the basic mineral...
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Abstract
The invention relates to a beneficiation method for mixed refractory tungsten ore. The beneficiation method comprises the following steps: (1) grinding crushed raw ore of scheelite and wolframite paragenic ore to obtain ore pulp; (2) when the pH value of the ore pulp is 7.0-9.0, an inhibitor, adding an activating agent lead nitrate and a collecting agent for mixed tungsten roughing, and respectively obtaining tungsten rough concentrate ore pulp and roughing tailing ore pulp; (3) performing mixed tungsten scavenging operation on the roughing tailing ore pulp twice to obtain tungsten scavenging tailings I; (4) carrying out weak magnetic iron removal operation on the tungsten rough concentrate ore pulp to respectively obtain a magnetic iron product and magnetic separation tailing ore pulp; (5) carrying out strong magnetic roughing and scavenging on the magnetic separation tailing ore pulp to respectively obtain a wolframite concentrate product and scavenging operation tailings; (6) performing dense dehydration on the scavenging operation tailings, and obtaining ore pulp with the concentration being 60%-70%; and (7) carrying out concentrated scheelite flotation operation on 60%-70% of ore pulp to respectively obtain scheelite concentrate and tungsten scavenging tailings II. The method provided by the invention effectively realizes effective separation and enrichment of wolframite and scheelite.
Description
technical field [0001] The invention relates to the technical field of non-ferrous metal beneficiation, in particular to a beneficiation method of mixed refractory tungsten ore. Background technique [0002] Tungsten is one of the irreplaceable basic materials for the national economy and modern national defense. It is an important strategic material and is widely used in important fields such as aerospace, machinery manufacturing, and national defense industry. Therefore, the country attaches great importance to the development and utilization of tungsten resources. [0003] At present, the methods for flotation and recovery of scheelite and wolframite from complex polymetallic ores such as sulfide ore, scheelite, wolframite, cassiterite, garnet, fluorite or calcite are relatively successful, including GY method, CY method and persimmon and bamboo garden method (combination of GY method and CY method). Their common feature is the use of chelating collectors (benzyl hydroxa...
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