阅读说明：本技术 一种从铁矿石选铁尾矿中回收黑、白云母的工艺 (Process for recovering black and white mica from iron ore iron-dressing tailings ) 是由 张鉴 谢广东 余利 于 2020-11-10 设计创作，主要内容包括：本发明公开了一种从铁矿石选铁尾矿中回收黑、白云母的工艺,涉及矿石加工的技术领域,包括以下步骤：对磨矿后的弱磁选尾矿采用立环磁选机选别,将含云母的尾矿与铁矿物分离；将含云母的尾矿泵入水力旋流器分级,得到细泥,再将细泥送入旋流器溢流脱除,得到旋流器沉砂;将旋流器沉砂送入螺旋溜槽中,得到螺旋溜槽尾矿和螺旋溜槽精矿；将螺旋溜槽精矿送入给矿箱,从给矿箱流入脱泥斗,脱泥斗溢流进入总尾矿,脱泥斗底流进入浮选前的搅拌槽；向搅拌槽中加入pH调整剂、抑制剂、捕获剂,并实时检测搅拌槽内的物料的PH值,直至搅拌槽内的PH值达到11,然后将搅拌槽内的物料进行一次粗选；本发明能够得到更好的浮选指标、提高浮选效果等优点。(The invention discloses a process for recovering black and muscovite from iron ore iron separation tailings, which relates to the technical field of ore processing and comprises the following steps: sorting the low-intensity magnetic tailings after grinding by adopting a vertical ring magnetic separator, and separating the tailings containing mica from iron minerals; pumping the mica-containing tailings into a hydrocyclone for classification to obtain fine mud, then sending the fine mud into the hydrocyclone for overflow removal to obtain hydrocyclone settled sand, and sending the hydrocyclone settled sand into a spiral chute to obtain spiral chute tailings and spiral chute concentrate; feeding the concentrate of the spiral chute into an ore feeding box, flowing into a desliming bucket from the ore feeding box, overflowing into the total tailings from the desliming bucket, and feeding the underflow of the desliming bucket into a stirring tank before flotation; adding a pH regulator, an inhibitor and a capture agent into the stirring tank, detecting the pH value of the material in the stirring tank in real time until the pH value in the stirring tank reaches 11, and then performing primary rough separation on the material in the stirring tank; the invention can obtain better flotation index, improve flotation effect and the like.)

1. A process for recovering black and white mica from iron ore tailings, which is characterized by comprising the following steps: the method comprises the following steps:

(1) sorting the low-intensity magnetic tailings after grinding by adopting a vertical ring magnetic separator, and separating the tailings containing mica from iron minerals;

(2) pumping the mica-containing tailings obtained in the step (1) into a hydrocyclone for classification to obtain fine mud with a fine particle grade of-0.04 mm, and then delivering the fine mud into the hydrocyclone for overflow removal to obtain hydrocyclone sand setting;

(3) sending the cyclone sand setting in the step (2) into a spiral chute to obtain spiral chute tailings and spiral chute concentrate;

(4) feeding the concentrate of the spiral chute in the step (3) into a feeding box, flowing into a desliming bucket from the feeding box, overflowing into the total tailings from the desliming bucket, and feeding the underflow of the desliming bucket into a stirring tank before flotation;

(5) and (4) adding a pH regulator, an inhibitor and a capture agent into the stirring tank in the step (4), detecting the pH value of the material in the stirring tank in real time until the pH value in the stirring tank reaches 11, performing primary roughing on the material in the stirring tank, performing primary scavenging, and finally performing tertiary scavenging to obtain the black-white mica bulk concentrate.

2. The process of claim 1, wherein the pH adjusting agent is NaOH.

3. The process of claim 1, wherein the inhibitor is water glass.

4. The process of claim 1, wherein the capture agent is dodecylamine.

5. The process of claim 1, wherein the mass ratio of NaOH, water glass and dodecylamine added into the stirring tank in the step (5) is 1:3: 0.5.

Technical Field

The invention relates to the technical field of ore processing, in particular to a process for recovering black and white mica from iron ore iron-dressing tailings.

Background

Mica is a rock-making mineral, presents a hexagonal flaky crystal form and is one of the main rock-making minerals; the mica crystal has a layered structure, so the mica crystal is a flaky crystal and mainly takes a hexagonal flaky crystal as a main part; the mica is characterized by insulation, high temperature resistance and most industrial use, and is widely applied to the industries of coatings, paints, electrical insulation and the like.

The mineral separation of mica ore is an enrichment process of mica mineral in the ore, and the current mineral separation method comprises the following steps: the flotation method is mainly applied to the recovery of lepidolite from lithium polymetallic ores, the recovery of sericite from copper ore tailings, the recovery of lepidolite from low-grade lepidolite ores, the recovery of muscovite and sericite from graphite ore tailings, and the recovery of mica from iron ore tailings.

Because the iron ore iron dressing tailings contain a large amount of fine mud with the grain size of-0.04 mm, the medicament is consumed, and the selectivity of flotation is damaged, although the existing iron dressing tailings are desliming by adopting a cyclone or a desliming bucket, the single use of the cyclone or the desliming bucket has limited industrial production effect.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a process for recovering black and white mica from iron ore iron-dressing tailings, which is used for solving the problem that the selectivity of flotation is damaged by the medicament in the prior art described in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a process for recovering black and white mica from iron ore tailings comprises the following steps:

(1) sorting the low-intensity magnetic tailings after grinding by adopting a vertical ring magnetic separator, and separating the tailings containing mica from iron minerals;

(2) pumping the mica-containing tailings obtained in the step (1) into a hydrocyclone for classification to obtain fine mud with a fine particle grade of-0.04 mm, and then delivering the fine mud into the hydrocyclone for overflow removal to obtain hydrocyclone sand setting;

(3) sending the cyclone sand setting in the step (2) into a spiral chute to obtain spiral chute tailings and spiral chute concentrate;

(4) feeding the concentrate of the spiral chute in the step (3) into a feeding box, flowing into a desliming bucket from the feeding box, overflowing into the total tailings from the desliming bucket, and feeding the underflow of the desliming bucket into a stirring tank before flotation;

(5) and (4) adding a pH regulator, an inhibitor and a capture agent into the stirring tank in the step (4), detecting the pH value of the material in the stirring tank in real time until the pH value in the stirring tank reaches 11, performing primary roughing on the material in the stirring tank, performing primary scavenging, and finally performing tertiary scavenging to obtain the black-white mica bulk concentrate.

Preferably: the pH regulator is NaOH.

Preferably: the inhibitor is water glass.

Preferably: the trapping agent is dodecylamine.

Preferably: and (3) adding NaOH, water glass and laurylamine into the stirring tank in the step (5) in a mass ratio of 1:3: 0.5.

The beneficial effect of adopting above technical scheme is:

before flotation, the iron tailings are deslimed continuously and mica minerals are enriched in advance, so that the selected ore amount and the mud content in flotation materials are reduced, and in the flotation process, alkaline ore pulp-anion and cation collectors are adopted for combined flotation, so that a better flotation index can be obtained.

Detailed Description

Preferred embodiments of the present invention are described in detail below.

Example one

In this embodiment, a process for recovering black and muscovite from iron ore tailings comprises the following steps:

(1) sorting the low-intensity magnetic tailings after grinding by adopting a vertical ring magnetic separator, and separating the tailings containing mica from iron minerals;

(2) pumping the mica-containing tailings obtained in the step (1) into a hydrocyclone for classification to obtain fine mud with a fine particle grade of-0.04 mm, and then delivering the fine mud into the hydrocyclone for overflow removal to obtain hydrocyclone sand setting;

(3) sending the cyclone sand setting in the step (2) into a spiral chute to obtain spiral chute tailings and spiral chute concentrate;

(4) feeding the concentrate of the spiral chute in the step (3) into a feeding box, flowing into a desliming bucket from the feeding box, overflowing into the total tailings from the desliming bucket, and feeding the underflow of the desliming bucket into a stirring tank before flotation;

(5) and (4) adding NaOH, water glass and dodecylamine into the stirring tank in the step (4) in a mass ratio of 1:3:0.5, detecting the pH value of the materials in the stirring tank in real time until the pH value in the stirring tank reaches 11, performing primary roughing on the materials in the stirring tank, performing primary scavenging, and finally performing tertiary concentration to obtain the black-white mica mixed concentrate.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.