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Method for low-grade magnesite flotation

A magnesite, low-grade technology, applied in flotation, solid separation and other directions, can solve problems such as environmental pollution, ore dumping, waste of resources, etc., and achieve the effect of solving environmental pollution problems and expanding magnesite resource reserves.

Inactive Publication Date: 2013-07-24
辽宁省地质矿产研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]In fact, the grade of MgO in the so-called lean ore is also about 40%, and the recovery rate of some mines in my country is less than 50%, or even lower, resulting in an extreme shortage of resources. Big waste, a large number of ore dumps, also cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1 A method for flotation of low-grade magnesite

[0014] (1) The steps are as follows

[0015] 1) Grinding: lean magnesite ore (low-grade magnesite in Pailou area, Haicheng, Liaoning, containing 2.30% silicon, 43% MgO, Fe 2 o 3 2.6%) after crushing, grind the ore, and take the 200-mesh sieve to get magnesite lean ore powder;

[0016] 2) First reverse flotation: According to the liquid-solid ratio of 1:1 (that is, 1 kg of magnesite lean ore powder requires 1 liter of reverse flotation agent), take the reverse flotation agent and magnesite lean ore powder, and put them in the environment Stir for 3 minutes at high temperature, fill with air, discard the foam in the upper layer, and keep the bottom material;

[0017] The composition of reverse flotation agent is: by weight, dodecylamine: hydrochloric acid is 1:1;

[0018] 3) Two times of positive flotation: the first positive flotation: according to the liquid-solid ratio of 3:1, take the positive flotation a...

Embodiment 2

[0022] Example 2 A method for flotation of low-grade magnesite

[0023] (1) The steps are as follows

[0024] 1) Grinding: lean magnesite ore (low-grade magnesite in Dashiqiao area, Liaoning, containing 2.50% silicon, 42% MgO, Fe 2 o 3 2.2%) after crushing, grind the ore, and take the 200-mesh sieve to get magnesite lean ore powder;

[0025] 2) First reverse flotation: According to the liquid-solid ratio of 1:1, take the reverse flotation agent and magnesite lean ore powder, stir for 3 minutes at ambient temperature, fill with air, discard the foam on the upper layer, and keep the bottom layer materials;

[0026] The composition of the reverse flotation agent is: by weight, dodecylamine: hydrochloric acid is 1:1.5;

[0027] 3) Two times of positive flotation: For the first positive flotation, according to the liquid-solid ratio of 2:1, take the positive flotation agent and the bottom material obtained in step 2), stir for 3 minutes at ambient temperature, and then infla...

Embodiment 3

[0031] Example 3 A method for flotation of low-grade magnesite

[0032] (1) The steps are as follows

[0033] 1) Grinding: The lean magnesite ore (low-grade magnesite in Liaoyang area, containing 3.50% silicon, 41% MgO, 2.2% CaO) is crushed and then ground, and the 200-mesh sieve is taken to obtain the lean magnesite Mineral powder;

[0034] 2) First reverse flotation: According to the liquid-solid ratio of 2:1, take the reverse flotation agent and magnesite lean ore powder, stir for 3 minutes at ambient temperature, fill with air, discard the foam on the upper layer, and keep the bottom layer materials;

[0035] The composition of reverse flotation agent is: by weight, dodecylamine: hydrochloric acid is 1:1;

[0036] 3) Two times of positive flotation: For the first positive flotation, according to the liquid-solid ratio of 4:1, take the positive flotation agent and the bottom material obtained in step 2), stir for 3 minutes at ambient temperature, and then inflate and f...

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Abstract

The invention relates to a method for low-grade magnesite flotation. The method includes the following steps: carrying out ore grinding on magnesite lean ore after the magnesite lean ore is smashed, and selecting 200-mesh screen underflow to obtain magnesite lean ore powder; taking reverse flotation reagents and the magnesite lean ore powder according to the liquid-solid ratio of 1-2:1, stirring the reverse flotation reagents and the magnesite lean ore powder for 3-5 minutes at an environment temperature, filling air into the reverse flotation reagents and the magnesite lean ore powder, removing foam on the upper layer, and keeping material on the bottom layer; taking direct flotation reagents and the material on the bottom layer in the step 2) according to the liquid-solid ratio of 2-4:1, stirring the direct flotation reagents and the material on the bottom layer for 3-5 minutes at the environment temperature, carrying out air filling and the flotation, and taking the foam material on the upper layer; and carrying out the process on the material on the upper layer again, taking the material on the upper layer again, and drying the material on the upper layer. According to the method for the low-grade magnesite flotation, the MgO content in low-grade magnesite can be effectively improved, the impurity content can be reduced, existing magnesite resources can be fully used, and both energy saving and environment protection are achieved.

Description

technical field [0001] The invention belongs to the field of flotation methods, in particular to a flotation method for processing lean magnesite ore into high-quality magnesite. Background technique [0002] Due to its high refractoriness, cohesiveness and other excellent physical and chemical properties, magnesite is widely used in metallurgy, building materials, chemical industry, light industry, agriculture and animal husbandry, and metal magnesium extraction and other fields. Magnesite is one of the advantageous mineral resources in my country, and its main type is crystalline magnesite. Its reserves, output and export volume all rank first in the world. The total reserves of magnesite in my country are about 3 billion tons, among which, the first and second grade products containing more than 43% MgO account for 53% of the total reserves, and the reserves of first grade and above (including special grade) magnesite are 1.17 billion tons, accounting for 53% of the total...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00
Inventor 李志锋
Owner 辽宁省地质矿产研究院
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