Pyrite mine dregs of re-election

Mineral processing technology is concerned, re-election is the most simple and feasible method. Re-election handling materials relatively coarse, size range relatively wide, different particle materials with different requirements of equipment; Re-election operating factors is simple. Various sorting equipment, people in the proportion of the raw material of particle size and basic same, choose other conditions are basically the same. Re-election large quantity, the equipment is simple, easy operation, less investment, technological process is quite simple. For all types of pyrite mine dregs also have certain adaptability.

According to equipment for the mining of silica
, it can be seen that, pyrite mine dregs of the proportion of the major mineral for 3.783 ~ 3.973. And the proportion of quartz for 2.65, the proportion of calcite 2.7, ZhengChangShi for 2.5 ~ 2.6, borax 1.7, GuangLuShi 1.6, MangXiao for 1.5, etc. According to the following, and the formula of the different proportion mineral re-election the degree of difficulty of the separation can be roughly to drop than to judge:

Type: δ 1-the proportion of light minerals;

δ 2-the proportion of heavy mineral;

Train-separation medium proportion.

The pyrite mine in iron ore slag main content and although the gangue minerals quartz the density difference is not big, but still can use re-election to choose don't. Will burn by 100 mesh slag sieve screening, under the screen level grinding 3 min, trial wave bed and spiral chute do a single dressing experiment, the experimental results see table.

Table wave bed, spiral chute single dressing experiment

Mineral processing


Concentrate grade


Yield (%)


Tailings grade


The Fe concentrate recovery (%)


S content

Wave bed


63.16


19.85


47.76


24.67


0.272

Spiral chute


60.23


56.68


38.50


67.18


0.296

Can be seen from the table, try out the effect of wave bed is not good, although grade can be up to 63.16%, but its yield and concentrate recovery is low, only 19.85% and 24.67% respectively. Adopting spiral chute processing and slag, can be directly used to choose don't such pyrite mine dregs. After one don't choose, and have a concentrate grade for more than 60% of iron concentrate, recovery has 67.18%, and sulfur content has fallen to 0.3%.

A single wave bed process can not reach good separation index. But the wave bed and spiral chute, a large quantity, simple technology advantages, such as simple operation. Considering the future industrial application, the feasibility of investment to reduce the cost and improve the economic benefit, appropriate chooses large quantity of equipment, so as to achieve better choose don't index, re-election for magnetic separation technology and joint process method to deal with pyrite mine dregs.