Gravity separation, magnetic separation and flotation combined recovery method for low-grade tin-containing tailings
A recovery method and low-grade technology, applied in the direction of mechanical material recovery, recycling technology, solid separation, etc., can solve the problems of increased cost of reagent consumption and cost increase, and achieve high flotation costs, improved grade, and clean and thorough desulfurization Effect
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Embodiment 1
[0031] Example 1: In this example, the low-grade tin-containing tailings of a concentrator in Wenshan, Yunnan are recovered, and tin is recovered as an associated useful metal during the production process of the concentrator. The tin grade in the tailings is 0.15%, and the gangue minerals are mainly ferropyroxene / diopside, garnet, etc., accounting for 28.20% and 24.74% respectively, and the cumulative occupation is 52.94%. It is transported to the original ore warehouse by rail, and after crushing and screening, grinding and grading, and flotation to obtain the main useful metals, low-grade tin-containing tailings are recovered from the tailings, such as figure 1 As shown, the specific steps are as follows:
[0032] (1) The low-grade tin-containing tailings are lifted into the thickening hopper by a centrifugal pump, and the low-grade tin-containing tailings are concentrated to a liquid-solid ratio of 25-35% to obtain sand settling and overflow, and then high-frequency vibrat...
Embodiment 2
[0039] Example 2: In this example, tin is recovered from secondary resources containing tin stored in a tailings dam in Guangxi. The tin grade in the tailings is 0.11%, and the gangue minerals are mainly ferropyroxene and feldspar. Such as figure 2 As shown, the specific steps are as follows:
[0040] (1) Grinding will increase a large amount of material consumption and manual management costs. In order to maximize economic benefits, the tailings are lifted from the tailings dam by a centrifugal pump into a high-frequency vibrating screen and separated by a 20-mesh screen to obtain a size greater than 0.83mm sieve product and less than 0.83mm under sieve product, and then carry out secondary concentration on the overflow to obtain secondary concentrated sand settling and secondary concentrated overflow;
[0041] (2) The sieve product larger than 0.83mm in step (1) is subjected to coarse sand shaker gravity separation to obtain coarse sand gravity separation tin concentrate I...
Embodiment 3
[0047] Example 3: In this example, the low-grade tin-containing tailings of a certain mine in Hunan are recovered. The tin grade in the tailings is 0.36%, and the gangue minerals are mainly garnet. Insufficient resource supply, part of the stockpiled tin-containing secondary resources are pumped from the old tailings dam and mixed with the original ore for processing. After the raw ore is crushed, screened, ground and graded, the specific steps are as follows:
[0048] (1) The low-grade tin-containing tailings are lifted into the thickening hopper by a centrifugal pump, and the low-grade tin-containing tailings are concentrated to a liquid-solid ratio of 25-35% to obtain sand settling and overflow, and are stored in the old tailings dam The tin-containing secondary resources are lifted by a centrifugal pump and combined with concentrated sand settling, and then the tin-containing secondary resources and concentrated sand settling are separated by a high-frequency vibrating scr...
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