Flotation-gravity combined beneficiation process for Anshan-type hematite

A hematite and Anshan-type technology, which is applied in the field of Anshan-type hematite flotation combined beneficiation process, can solve the problems of frequent ore circulation, difficult production operation, and easy fluctuation of production indicators, and achieves reduced tailings grade and qualified The effect of increasing the rate and reducing the amount of circulation

Inactive Publication Date: 2020-04-17
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The flotation process has the following problems: the concentrated tailings and three-stage scavenging concentrate are returned to the upper stage to feed the ore in sequence, the middle ore cycle is frequent, the entire flotation operation affects each other, the production operation is relatively difficult, and the production index is easy. fluctuation

Method used

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  • Flotation-gravity combined beneficiation process for Anshan-type hematite
  • Flotation-gravity combined beneficiation process for Anshan-type hematite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The ore sample used in the test of this embodiment is the Anshan type hematite flotation feed used in Anqian Concentrator, the -200 mesh content is 85%, and the iron grade of the feed is 45.42%. figure 2 Shown technique of the present invention is sorted out, carries out according to the following steps:

[0022] (1) Flotation operation

[0023] The flotation operation consists of one stage of roughing, one stage of fine selection and three stages of sweeping:

[0024] The above-mentioned flotation feed ore of Anqian Concentration Plant is fed into the first stage of roughing, the grade of the first stage of rougher concentrate is 55.89%, and the grade of the first stage of rougher tailings is 35.31%; the first stage of rougher concentrate is fed into the first stage of concentration operation to obtain The grade is 65.52%. The first stage of concentrated ore and the first stage of concentrated tailings; The third-stage scavenging tailings with a grade of 16.33%; the...

Embodiment 2

[0030] The sorting process is the same as embodiment 1, and the difference is that the ore grade and granularity are different, so the sorting index is different, as follows:

[0031] (1) Flotation feed ore -200 mesh content 95%, iron grade 49.88%;

[0032] (2) The grade of the first roughing concentrate is 59.42%, the grade of the first roughing tailings is 34.91%, and the grade of the first roughing concentrate is 67.84%;

[0033] (3) The tailings grade of the third-stage sweeping process is 15.35%. The ore grade in flotation operation is 44.97%;

[0034] (4) The concentrate grade of the spiral chute is 66.39%, the grade of medium ore in the spiral chute is 34.39%, and the grade of tailings in the spiral chute is 19.20%;

[0035] (5) Shaker concentrate grade is 44.42%, shaker tailings grade is 24.52%;

[0036] (6) The final concentrate grade is 67.34%, and the final tailings grade is 19.59%.

Embodiment 3

[0038] The sorting process is the same as embodiment 1, and the difference is that the ore grade and granularity are different, so the sorting index is different, as follows:

[0039] (1) Flotation feed ore -200 mesh content 90%, iron grade 48.36%;

[0040] (2) The grade of the first stage of roughing concentrate is 58.65%, the grade of the first stage of roughing tailings is 34.02%, and the grade of the first stage of refined concentrate is 66.52%;

[0041] (3) The tailings grade of the third-stage sweeping is 18.27%, and the ore grade of the flotation operation is 43.45%;

[0042] (4) The concentrate grade in the spiral chute is 65.44%, the grade in the spiral chute is 33.83%, and the grade of tailings in the spiral chute is 18.01%;

[0043] (5) The shaker concentrate grade is 43.50%, and the shaker tailings grade is 23.83%;

[0044] (6) The final concentrate grade is 66.51%, and the final tailings grade is 17.27%.

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Abstract

The invention relates to a flotation-gravity combined beneficiation process for Anshan-type hematite, which comprises a flotation operation consisting of primary coarse flotation, primary fine flotation and tertiary scavenging; the method is characterized by further comprising a gravity separation operation consisting of a spiral chute and a shaking table. The specific sorting process is that theAnshan hematite with the grade of 45-50% is fed into the flotation operation, and the primarily refined tailings, the primarily scavenged concentrates, the secondarily scavenged concentrates and the thirdly scavenged concentrates produced by the flotation operation are combined into flotation middlings; the flotation middlings are fed into the spiral chute to acquire spiral concentrates, spiral middlings and spiral tailings; the spiral middlings are fed into the shaking table to acquire the shaking table concentrates and the shaking table tailings; the shaking table concentrates are returned to the spiral chute for feeding; the flotation concentrates and the spiral concentrates are combined into final concentrates with grade of 65% and more, and the flotation tailings, the spiral tailingsand the shaking table tailings are combined into the final tailings with grade of 14-2-%. The process disclosed by the invention has the advantages that 1) the production operation is convenient, andthe index is stable; 2) the qualification rate of the competitive products is improved by more than 15 percent, and the tail products are reduced by more than 1 percent.

Description

technical field [0001] The invention belongs to the technical field of mining engineering beneficiation, and in particular relates to an Anshan-style hematite floating-weight combined beneficiation process. Background technique [0002] Anshan-style hematite is an important type of iron ore in my country. The production process currently used is stage grinding, coarse and fine separation, gravity separation-strong magnetic-anion reverse flotation process and stage grinding, weak magnetic-strong magnetic — Anion reverse flotation process. The flotation part of these two processes is one-stage roughing, one-stage beneficiation, and three-stage sweeping, which is a typical one-coarse, one-fine, three-sweep flotation process. figure 1 . [0003] The flotation process has the following problems: the concentrated tailings and three-stage scavenging concentrate are returned to the upper stage to feed the ore in sequence, the middle ore cycle is frequent, the entire flotation opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03B7/00
CPCB03B7/00B03B9/00
Inventor 徐冬林韦文杰余建文钟小宇王长艳李纯阳高鹏
Owner ANSTEEL GRP MINING CO LTD
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