Method for carrying out flotation on high-silicon high-calcium low-grade magnesite step by step
A step-by-step flotation and magnesite technology, applied in flotation, solid separation and other directions, can solve problems such as waste of resources, and achieve the effects of low cost, good flotation effect and low ore grade
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Embodiment 1
[0027] The main components of high-silicon, high-calcium and low-grade magnesite raw materials contain MgO43.08%, SiO 2 2.29%, CaO 4.75%, FeO 0.12%, Al 2 o 3 0.07%;
[0028] Ball mill high-silicon, high-calcium and low-grade magnesite until the fineness is less than 0.074mm, accounting for 70% of the total weight of all materials, and then add water to make raw ore slurry with a weight concentration of 20%;
[0029] Put the raw ore pulp into the flotation equipment, under the condition of stirring speed of 1600rpm, add the collector dodecylamine and stir for 3min, the amount of dodecylamine added is 100g / t raw ore pulp, then add pinitol oil and stir for 60s, pinitol The amount of oil added is 10g / t raw ore pulp, and then 4min reverse flotation roughing is carried out to sort out SiO-containing 2 tailings; the original concentrate obtained by reverse flotation roughing is subjected to 2 times of reverse flotation and concentration to obtain desiliconized ore. During the fi...
Embodiment 2
[0038] High-silicon high-calcium low-grade magnesite raw material is the same as embodiment 1;
[0039] Ball mill high-silicon, high-calcium and low-grade magnesite until the fineness is less than 0.074mm, accounting for 80% of the total weight of all materials, and then add water to make raw ore pulp with a weight concentration of 30%;
[0040] Put the raw ore pulp into the flotation equipment, under the condition of stirring speed 1700rpm, first add the inhibitor sodium hexametaphosphate and stir for 4min, the amount of sodium hexametaphosphate added is 100g / t raw ore pulp, and then add the collector dodecylamine Stir for 4min, the addition of dodecylamine is 150g / t raw ore pulp, then add terpineol oil and stir for 80s, the addition of terpineol oil is 15g / t raw ore pulp, then carry out 5min reverse flotation roughing, sort out the SiO 2 tailings; the original concentrate obtained by reverse flotation roughing is subjected to 1 reverse flotation concentration to obtain desi...
Embodiment 3
[0045] High-silicon high-calcium low-grade magnesite raw material is the same as embodiment 1;
[0046] Ball mill high-silicon, high-calcium and low-grade magnesite until the fineness is less than 0.074mm, accounting for 95% of the total weight of all materials, and then add water to make raw ore pulp with a weight concentration of 40%;
[0047] Put the raw ore pulp into the flotation equipment, under the condition of stirring speed of 1800rpm, first add the inhibitor sodium hexametaphosphate and stir for 3 minutes, the amount of sodium hexametaphosphate added is 200g / t raw ore pulp, and then add the collector dodecylamine Stir for 3 minutes, the addition of dodecylamine is 200g / t raw ore pulp, then add terpineol oil and stir for 90s, the addition of terpineol oil is 20g / t raw ore pulp, then carry out 4min reverse flotation roughing, sort out the SiO 2 tailings; the original concentrate obtained by reverse flotation roughing is used as desiliconized ore;
[0048] Add water t...
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