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Stepped-flotation separation method for iron ore containing carbonas

A step-by-step flotation, iron ore technology, applied in flotation, magnetic separation, solid separation, etc., can solve the problems affecting the stability of the process, high tailing yield, large consumption of chemicals, etc., to achieve improved flotation The effect of choosing the environment and running smoothly

Inactive Publication Date: 2008-10-01
ANSTEEL GRP MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional flotation separation method of siderite and hematite is difficult to obtain high-grade hematite, the consumption of reagents is large, the recovery rate is low, and the yield of fine tail is large, and the stability of the process flow is affected when the middle ore is returned. sex

Method used

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  • Stepped-flotation separation method for iron ore containing carbonas
  • Stepped-flotation separation method for iron ore containing carbonas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The carbonate-containing mixed magnetic separation iron concentrate provided by Dong'anshan Sintering Plant was selected. figure 1 Process flow for flotation.

[0031] Add water to the mixed magnetic separation iron concentrate to adjust the slurry to a concentration of 20%, send the slurry to the flotation equipment, add inhibitors and stir for 4 minutes, and the addition amount is 800g / t; add collectors and stir for 4 minutes, the addition amount is 300g / t; then positive flotation is carried out to sort out siderite concentrate, and the yield of siderite concentrate is 13.31%.

[0032] Use the tailings obtained after the positive flotation process as the ore feed for reverse flotation, add NaOH aqueous solution with a pH value of 11 to adjust the slurry, and the slurry concentration is 30%; add inhibitors and stir for 4 minutes, and the addition amount is 500g / t; add activation Add collector and stir for 4 minutes, the addition amount is 1200g / t; add collector and st...

Embodiment 2

[0039] The adopted carbonate-containing mixed magnetic iron concentrate and technological process are the same as those in Example 1.

[0040] Add water to the mixed magnetic separation iron concentrate to adjust the slurry to a concentration of 30%, send the slurry to the flotation equipment, add inhibitors and stir for 4 minutes, and the addition amount is 400g / t; add collectors and stir for 4 minutes, the addition amount is 50g / t; then carry out positive flotation to sort out siderite concentrate, and the yield of siderite concentrate is 15.97%.

[0041] Use the tailings obtained after the positive flotation process as the feed for reverse flotation, add NaOH aqueous solution with a pH value of 11.5 to adjust the slurry, and the slurry concentration is 30%; add inhibitors and stir for 4 minutes, and the addition amount is 150g / t; add activation The collector is stirred for 4 minutes, and the addition amount is 600g / t; the collector is added and stirred for 4 minutes, and th...

Embodiment 3

[0051] The adopted carbonate-containing mixed magnetic iron concentrate and technological process are the same as those in Example 1.

[0052] Add water to the mixed magnetic separation iron concentrate to adjust the slurry to a concentration of 40%, send the slurry to the flotation equipment, add inhibitors and stir for 4 minutes, and the addition amount is 600g / t; add collectors and stir for 4 minutes, the addition amount is 180g / t; then carry out positive flotation to sort out siderite concentrate, and the yield of siderite concentrate is 14.26%.

[0053] Use the tailings obtained after the positive flotation process as the feed for reverse flotation, add NaOH aqueous solution with a pH value of 12 to adjust the slurry, and the slurry concentration is 30%; add inhibitors and stir for 4 minutes, and the addition amount is 300g / t; add activation Add the collector and stir for 4 minutes, the addition amount is 900g / t, add the collector and stir for 4 minutes, the addition amou...

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Abstract

The invention discloses a flotation and separation method of carbonate-bearing iron ore which has fractional steps and is characterized in that the carbonate-bearing iron ore is milled by a ball milling method and pre-separated by adopting low-intensity magnetic separation and high-intensity magnetic separation, and iron ore concentrate that is obtained from the mixed magnetic separation is separated by the flotation technique with fractional steps, which comprises the following steps: in the first step, siderite concentrate is selected under neutral condition by adopting the direct flotation technique; in the second step, the hematite concentrate is selected under strong basicity condition by adopting the reverse flotation technique. The flotation and separation method of the carbonate-bearing iron ore of the invention has smooth process running, the siderite selection in the first step improves flotation environment, and the hematite selection in the second step can finally obtain the hematite concentrate with the iron grade of over 66 percent and the recovery rate of over 62 percent. The flotation and separation method of the carbonate-bearing iron ore of the invention provides an exploiting method of the domestic potential iron ore resources with low iron grade and has important significance to the economical and reasonable exploiting of the carbonate-bearing iron ore.

Description

technical field [0001] The invention belongs to the field of mineral processing, in particular to a step-by-step flotation separation method for carbonate-containing iron ore. Background technique [0002] With the development of my country's social economy and the acceleration of industrialization and urbanization, the demand for steel products is increasing year by year. The development of potential iron ore resources has become an important topic in the field of mining and metallurgy. [0003] Since 1996, my country's steel output has been ranking first in the world. The rapid development of iron and steel industry production has led to the rapid growth of iron ore demand and production, and iron ore production is in short supply. Since 2003, my country has become the country that imports the most iron ore in the world. In 2007, the import volume of iron ore was as high as 383 million tons. In 2008, the price of imported iron ore rose again by 65%, causing the price of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03C1/00B03D1/00
Inventor 印万忠韩跃新李艳军张淑敏张明
Owner ANSTEEL GRP MINING CO LTD
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