Method for recycling magnetite, monoclinic pyrrhotite, hexagonal pyrrhotite and pyrite step by step

A technology of pyrrhotite and pyrite, which is applied in the field of mineral processing, can solve the problems of low added value, resource waste, mudification, etc., achieve the effect of magnetic enhancement, improve the economic benefits of enterprises, and solve the effects of high prices

CN108745625AActive Publication Date: 2018-11-06安徽铜冠产业技术研究院有限责任公司
9 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-11-06

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for recycling magnetite, monoclinic pyrrhotite, hexagonal pyrrhotite and pyrite step by step. The method comprises the following steps of 1, magnetic separation, 2, magnetic concentrate flotation, 3, pyrite roughing, 4, pyrite scavenging, 5, pyrite precise separation, 6, inoculation magnetic separation and 7, magnetic concentrate flotation. The method has the beneficial effects that the technical problem that the magnetite and the monoclinic pyrrhotite are approximate in density and magnetism, the sulfur content of the magnetite is high, the hexagonal pyrrhotite is prone to argillization and oxidization, and the hexagonal pyrrhotite and gangue mineral are approximate in floatability, so that the sulfur concentrate grade is not high is solved. The method hasimportant significance to increasing of the economic benefits of an enterprise and social benefits.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of ore dressing, in particular to a method for stepwise recovery of magnetite, suppressed monoclinic pyrrhotite, hexagonal pyrrhotite and pyrite. Background technique

[0002] With the rapid development of modern industry, my country's limited rich ore and easy-to-select iron ore resources are gradually exhausted, and a large amount of iron ore is imported from abroad every year. At the same time, a large part of sulfur-containing magnetite in China has not been fully developed and utilized. In order to meet the raw material requirements of pig iron production and steelmaking engineering, it is necessary to fully increase the utilization value of sulfur-containing magnetite ore.

[0003] Pyrite deposits are mainly formed by endogenesis. The unsolidified magma deep in the earth contains a large amount of sulfur. When the magma intrudes into the crust, the sulfur contained in the magma is separated due to the decrease...

Examples

Embodiment 1

[0027] Embodiment 1: the method for reclaiming magnetite, monoclinic pyrrhotite, hexagonal pyrrhotite and pyrite step by step, it may further comprise the steps:

[0028] (1) Magnetic separation: adjust the concentration of copper-separated tailings to 25%, and send them to a magnetic separator for magnetic separation at a magnetic field strength of 1800Gs to obtain magnetic concentrates and magnetic separation tailings. Magnetic concentrates include magnetite and single Plagiopyrhotite, magnetic separation tailings include pyrite and hexagonal pyrrhotite;

[0029] (2) Magnetic concentrate flotation: adjust the concentration of magnetic concentrate to 25%, add 500g / t oxalic acid and ferrous sulfate each, stir for 5min; add 20g / t butyl sodium xanthate and 20 g / t pine oil , stirring for 2 minutes, and flotation for 5 minutes to obtain flotation concentrate and flotation tailings, the flotation concentrate is monoclinic pyrrhotite, and the flotation tailings is magnetite;

[003...

Embodiment 2

[0035] Embodiment 2: the method for reclaiming magnetite, monoclinic pyrrhotite, hexagonal pyrrhotite and pyrite step by step, it may further comprise the steps:

[0036] (1) Magnetic separation: Adjust the concentration of copper-separated tailings to 28%, and send them to a magnetic separator for magnetic separation at a magnetic field strength of 2000Gs to obtain magnetic concentrates and magnetic separation tailings. Magnetic concentrates include magnetite and single Plagiopyrhotite, magnetic separation tailings include pyrite and hexagonal pyrrhotite;

[0037] (2) Magnetic concentrate flotation: adjust the concentration of magnetic concentrate to 28%, add oxalic acid and ferrous sulfate 500g / t each, stir for 5min; add collector 25g / t and foaming agent 25 g / t, Stir for 2.5 minutes, and float for 7 minutes to obtain flotation concentrate and flotation tailings. The flotation concentrate is monoclinic pyrrhotite, and the flotation tailings is magnetite;

[0038] (3) Rough s...

Embodiment 3

[0043] Embodiment 3: the method for reclaiming magnetite, monoclinic pyrrhotite, hexagonal pyrrhotite and pyrite step by step, it may further comprise the steps:

[0044] (1) Magnetic separation: Adjust the concentration of copper-separated tailings to 30%, and send them to a magnetic separator for magnetic separation at a magnetic field strength of 2200Gs to obtain magnetic concentrates and magnetic separation tailings. Magnetic concentrates include magnetite and single Plagiopyrhotite, magnetic separation tailings include pyrite and hexagonal pyrrhotite;

[0045] (2) Magnetic concentrate flotation: adjust the concentration of magnetic concentrate to 30%, add oxalic acid and ferrous sulfate 500g / t each, stir for 5min; add collector 30g / t and foaming agent 30 g / t, Stir for 3 minutes, and float for 8 minutes to obtain flotation concentrate and flotation tailings. The flotation concentrate is monoclinic pyrrhotite, and the flotation tailings is magnetite;

[0046] (3) Rough sep...