The content of tungsten trioxide in tungsten fine mud is between 20% and 40%; the particle size is below 74 microns, of which about 10% of the metal content is less than 10 microns; it is associated with molybdenum, bismuth, copper, iron and other sulfide ore and tin Stone, etc.; is known as hard-to-select tungsten materials; it has the characteristics of low tungsten content, fine particle size, large specific surface area, high surface energy, mixed components, and difficult to recycle.
Tungsten fine mud is generally divided into primary fine mud and secondary fine mud. The primary fine mud accounts for about 70% of the total amount of fine mud, and about 9% of the total amount of raw ore.The grade is high, equivalent to three times the secondary fine mud. Due to natural weathering, it is easier to be separated and leached; the secondary fine mud grade It is relatively low, accounting for about 16% of the qualified ore, and it is treated separately from the secondary fine mud, which can improve resource recovery and beneficiation efficiency.
Tungsten fine mud has a low content of tungsten trioxide, which is difficult to reach the quality standard of concentrate, and it is an intermediate product. In the past, mines mixed this part of tungsten materials into the ranks of standard concentrates for sale. Later, in order to meet the needs of industrial technology development, the quality of tungsten concentrates was improved, and the output of tungsten fine mud that was difficult to recycle was increasing, reaching about 2,000 tons per year. The output of tungsten fine mud from the wolframite beneficiation plant accounts for about 14% of the original ore, and the metal occupies more than 14%. However, in addition to tungsten minerals such as black, scheelite and tungsten, tungsten fine mud also contains a large number of gangue minerals. The complex composition, unsatisfactory beneficiation technology and beneficiation equipment make the recovery of tungsten fine mud difficult, and the recovery rate is generally low. Generally around 40%, a lot of tungsten resources are wasted.
