A kind of full-grain flotation separation method of clay-type pyrite

A separation method and technology of pyrite, applied in flotation, solid separation and other directions, can solve the problems of difficulty in obtaining high-quality pyrite concentrate, restricting the comprehensive utilization of aluminum-bearing minerals, and difficulty in full-grain separation, and achieve stable Flotation separation effect, excellent flotation index, guaranteed flotation effect

Active Publication Date: 2018-12-28
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the primary particle size of pyrite in this ore is relatively fine, and it is difficult to sort the whole particle size; the floatable clay and carbonaceous materials such as pyrophyllite have good floatability, and it is difficult to effectively suppress it; when the ore is finely ground and flotation Clay minerals are muddy and agglomerated, and the viscosity of the slurry is very high, resulting in a decline in separation; the above technical difficulties in beneficiation make it extremely difficult to obtain high-quality sulfur concentrate from these clay-type low-grade pyrite ores
Due to the difficulty of desulfurization, the further comprehensive utilization of aluminum-containing minerals in the above resources is also restricted

Method used

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  • A kind of full-grain flotation separation method of clay-type pyrite
  • A kind of full-grain flotation separation method of clay-type pyrite
  • A kind of full-grain flotation separation method of clay-type pyrite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Ore characteristics:

[0034] Low-grade pyrite ore in a certain place, the chemical content of four main components of sulfur, iron, aluminum, and silicon in the ore is as high as 84%, its S grade is 15.3%, and contains 1% of carbon; the ore contains calcium, magnesium, potassium, Sodium content is less, heavy metals and other trace elements. The main metallic minerals in the ore are pyrite (30%), and the non-metallic minerals are aluminosilicate clay minerals, among which pyrophyllite and kaolinite are relatively high, accounting for 53% of the total. It can be seen that the ore is a clay-type low-grade pyrite that is difficult to process. Based on the study of ore chemistry and material composition, the overall nature of the ore is further demonstrated to be pyrophyllite-type pyrite ore through EDS phase analysis.

[0035] 2. Mineral dressing process:

[0036] (1) Grinding pyrite raw ore to obtain a floating sample, the particle size is -0.074mm and the content ...

Embodiment 2

[0048] Ore characteristic is identical with embodiment 1, and ore dressing process is as follows:

[0049] (1) Grinding the pyrite raw ore to obtain a floating sample, the particle size is -0.074mm and the content accounts for 95% of the quality of the floating sample;

[0050] (2) Add clay slime dispersant sodium pyrometaphosphate 1800g / t raw ore, pyrite combined collector butyl xanthate component 250g / t raw ore, Mercaptan component 100g / t raw ore, clay slime inhibitor Gur gum 1000g / t raw ore, and foaming agent methyl isobutyl carbinol 80g / t raw ore, after fully mixing, fill in air for pyrite roughing Separation to obtain crude sulfur concentrate and roughing tailings;

[0051] (3) Sulfur coarse concentrate is selected for four times, and each time it is selected to obtain its own selected middle ore. In the last selection, in addition to the selected middle ore, sulfur concentrate is obtained, and the selection I, II, and III , Ⅳ medium ore are respectively the Ⅰ middle mi...

Embodiment 3

[0061] Ore characteristic is identical with embodiment 1, and ore dressing process is as follows:

[0062] (1) Grinding the pyrite raw ore to obtain a floating sample, the particle size is -0.074mm and the content accounts for 90% of the floating sample quality;

[0063] (2) To the floating sample in step (1), add clay slime dispersant sodium pyrometaphosphate 800g / t raw ore, pyrite combined collector butyl xanthate component 150g / t raw ore, Mercaptan component 30g / t raw ore, clay slime inhibitor Gur gum 500g / t raw ore, foaming agent methyl isobutyl carbinol 100g / t raw ore, after fully mixing, fill in air for pyrite roughing Separation to obtain crude sulfur concentrate and roughing tailings;

[0064] (3) Sulfur coarse concentrate is selected for four times, and each time it is selected to obtain its own selected middle ore. In the last selection, in addition to the selected middle ore, sulfur concentrate is obtained, and the selection I, II, and III , Ⅳ medium ore are respe...

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Abstract

The invention discloses a whole-size-range floatation separation method suitable for clay-type pyrite. The method comprises the following steps that (1), pyrite raw ores are ground; (2), a dispersingagent, a combined collecting agent, an inhibitor and a foaming agent are sequentially added into the obtained object of the step (1) for full size mixing, and then rough separation is carried out to obtain sulfur crude concentrates and rougher tailings; (3), the sulfur crude concentrates undergo concentration for four times after being fed with a collecting agent and an inhibitor, and the roughertailings undergo scavenging for twice after being fed with a combined collecting agent, an inhibitor and a foaming agent; and the combined collecting agent is composed of a component A and a componentB, and the mass ratio is 5:1-2:3. According to the method, multiple times of separation processes such as rough separation, concentration and scavenging are combined, the appropriate flotation reagents are added, a stable flotation separation effect is obtained under the ore pulp natural pH condition, the pyrite whole-size-range flotation index is excellent, and the method is a relatively ideal flotation method for the clay-type pyrite.

Description

technical field [0001] The invention belongs to the field of beneficiation technology, and in particular relates to a full-grain fractional flotation separation method for clay-type pyrite. Background technique [0002] Pyrite is an important raw material for the sulfuric acid industry. With the development of my country's industry, the market demand for pyrite is increasing day by day. Pyrite is not only a sulfur resource, but also an iron resource (acid slag) and energy (acid steam). China's sulfur resources are highly dependent on foreign countries, and the self-sufficiency rate is only 52%. The amount of pyrite acid production in my country is about 24% of the total sulfuric acid production. [0003] In a certain place in Southwest my country in recent years, the proven pyrite resources totaled 250 million tons, and the average sulfur grade of the ore was about 16%. Driederite, montmorillonite, chlorite, carbonaceous matter, etc., belong to large clay-type low-grade pyr...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B03D1/02B03D1/004B03D101/02B03D103/02
CPCB03D1/004B03D1/025B03D2201/02B03D2203/02
Inventor赵开乐闫武刘能云陈炳炎廖祥文
OwnerINST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI