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Method for carrying out flotation on high-silicon high-calcium low-grade magnesite step by step

A step-by-step flotation, low-grade technology, applied in flotation, solid separation, etc., can solve problems such as waste of resources, achieve low cost, good flotation effect, and realize the effect of industrialization

Inactive Publication Date: 2013-04-03
丹东市镁宝镁业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, many magnesite mines in my country only mine high-quality magnesite ore, and many relatively poor magnesite ores have not been utilized, resulting in a great waste of resources

Method used

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  • Method for carrying out flotation on high-silicon high-calcium low-grade magnesite step by step
  • Method for carrying out flotation on high-silicon high-calcium low-grade magnesite step by step

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a method for carrying out flotation on high-silicon high-calcium low-grade magnesite step by step, belonging to the technical field of mineral processing. The method comprises the following steps of: (1) carrying out ball milling on the high-silicon high-calcium low-grade magnesite and adding water to prepare raw ore pulp; (2) placing the raw ore pulp into flotation equipment, adding inhibitor, collecting agent and foaming agent while stirring is carried out, carrying out reverse flotation roughing, and carrying out reverse flotation selection on the obtained raw ore concentrate 0-2 times to obtain desiliconized ore; and (3) adding water into the desiliconized ore to prepare ore pulp, regulating the pH value to be 10-11, adding the inhibitor water glass, the inhibitor sodium hexametaphosphate and the collector to be stirred while stirring is carried out, carrying out direct flotation roughing, and carrying out direct flotation selection on the obtained desiliconized ore concentrate 0-2 times to obtain magnesite ore concentrate. The ore processed by the method provided by the invention has low grade, the obtained magnesite ore concentrate can reach super standard in the metallurgical industry, the flotation effect is good, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a step-by-step flotation method for high-silicon, high-calcium and low-grade magnesite. Background technique [0002] Magnesite is an important non-metallic mineral resource and an important raw material for magnesia materials. About 90% of magnesite is used to produce high-grade refractory materials with a refractoriness above 2000°C. [0003] Magnesite is one of the advantageous mineral resources in my country. The proven reserves of magnesite are about 3.564 billion tons, accounting for 28.7% of the world's total reserves, ranking first in the world. Most of my country's magnesite resources are low-iron crystalline magnesite, which has high grade and low mining cost. However, in recent years, many magnesite mines in my country only mine high-quality magnesite ore, and many relatively poor magnesite ores have not been utilized, resulting in a great waste of resource...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00
Inventor 印万忠李强姜雪韩跃新
Owner 丹东市镁宝镁业有限公司
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