Reverse flotation iron increase and silicon removing method for refractory limonite

A technology of reverse flotation and limonite, which is applied in flotation, solid separation, etc., can solve the problems of high mineral processing cost, high reagent consumption, and low flotation efficiency, and achieve improved mineral processing recovery rate, high economic promotion value, The effect of fewer types of potions

Inactive Publication Date: 2008-08-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the past, the beneficiation process with industrial production practice included strong magnetic separation and strong magnetic separation-positive flotation. Poor) and the constraints of flotation reagents, its separation index is poor, and the beneficiation cost of reduction magnetization roasting-weak magnetic separation process is relatively high, so this type of iron ore has basically not been effectively utilized
Treatment of limonite by flotation is a typical beneficiation problem. The reasons are: 1) limonite and gangue minerals are similar in nature, which reduces the selectivity of reagents; 2) generally speaking, limonite is a deeply weathered ore. The particle size is extremely fine, which belongs to the category of fine particle flotation. The flotation speed is slow, the reagent consumption is high, and the flotation efficiency is low; 3) There are many forms of limonite, and the reagent system and process adaptability are poor; 4) Silicon-containing minerals are generally clay minerals. High surface energy, fine particle size, easy to flocculate useful minerals, resulting in flotation failure

Method used

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  • Reverse flotation iron increase and silicon removing method for refractory limonite
  • Reverse flotation iron increase and silicon removing method for refractory limonite
  • Reverse flotation iron increase and silicon removing method for refractory limonite

Examples

Experimental program
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Effect test

Embodiment 1

[0019] This method is used to carry out reverse flotation desiliconization and iron extraction of limonite in a mining area in Jiangxi. Limonite is the main iron-containing mineral in the mining area. It appears in the form of granular colloidal rings forming a grid structure. The grids or cavities are often filled with iron-containing clay materials. Mainly) output, limonite and quartz are very closely related. Among them, the average geological grade of iron is 37%, and that of quartz is 32%. Grind the ore to -0.074mm and account for 90%, add 3000 g / t (ore) sodium carbonate during the grinding process, add fresh water to a concentration of 10%, stir until fully dispersed, settle and deslim twice, and the pulp after desliming Concentrate to 40%, add sulfuric acid to control the pH value at about 6, add 50-2000 grams / ton (mine) starch or modified starch (see Table 1 for specific dosage and flotation effect) as limonite inhibitor, 200 grams / ton Ton (mine) 1227 is the collecto...

Embodiment 2

[0021] This method was used to desiliconize a limonite in Guangdong by reverse flotation dispersing cationic enhanced slurry. The limonite deposit is a continental sedimentary deposit. The main mineral in the ore is limonite, followed by a small amount of magnetite and siderite. Gangue minerals mainly include quartz, calcite, chlorite and so on. In the raw ore, limonite and siderite are mainly produced in oolitic form, a small amount is in argillaceous form, and magnetite is produced in massive form. The main component of the ore is an average total iron content of 42% to 44%, low phosphorus and sulfur, and a quartz content of 23.34%. The ore is ground to -0.074mm, accounting for 85%. During the grinding process, 2000 g / t (mine) anhydrous sodium carbonate is added. After sedimentation and desliming twice, the pulp is concentrated to 40%, and sulfuric acid is added to adjust the pH to 5-7 , add 10-2500 g / ton (mine) molecular weight polyacrylamide (see Table 1) of about 10000...

Embodiment 3

[0023] Using this method, a reverse flotation desiliconization test was carried out on an iron ore in Xinjiang. The main iron mineral of this iron ore is limonite, and the gangue is iron silicate mineral, in which the grade of total iron is 46.5%, SiO 2 22.27%. The ore is crushed to -0.074mm, accounting for 90%. Add 1500 during the grinding process. After desliming, concentrate the pulp to 30%. Add sulfuric acid to adjust the pH to 5-6. Add 50-3000 g / t lignosulfonic acid Sodium is as limonite depressant (specifically see table 1), 200 grams / ton cationic collector 1231, through five reverse flotation (flow chart sees image 3 ), the obtained iron grade is above 52%, SiO 2 For iron ore concentrates with less than 8.21%, the recovery rate of total iron is more than 76%, which is a good indicator.

[0024] The "ton" in the "gram / ton" involved in the present invention refers to raw ore.

[0025] Table 1

[0026]

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Abstract

The invention discloses an reverse flotation iron extracting and desiliconizing method of rebellious limonite. The procedure of the invention is as following: finely grinding, dispersing and desliming ore; adding sulphuric acid to stir the ore power into paste; adding a certain amount of starch or modified starch, lignosulfonate sulphonic acid and their salt and polyacrylamide with the molecular weight about 10,000 or polyacrylamide inhibitory iron-bearing mineral; adopting cation collector quaternary ammonium salt to reverse flotation and separate ore with silicon range or iron ore in a method of adding a little amount of medicine for many times. The reverse flotation iron extracting and desiliconizing method has the advantages of simple process, few medicine agent varieties, able to obtain high grade iron ore concentrate and good effect of raising ore dressing recovery percentage of limonite.

Description

technical field [0001] The invention relates to a beneficiation method of iron ore, in particular to a reverse flotation iron extraction and desiliconization method of refractory limonite. Background technique [0002] Limonite is rich in crystal water, so it is difficult to achieve 60% iron concentrate grade by physical beneficiation method, but after roasting, the iron concentrate grade can be greatly improved due to large burning loss. In addition, because limonite is easily muddied during the crushing and grinding process, it is difficult to obtain a high metal recovery rate. The beneficiation process of limonite includes reduction magnetization roasting-weak magnetic separation, strong magnetic separation, gravity separation, flotation and their combined processes. In the past, the beneficiation process with industrial production practice included strong magnetic separation and strong magnetic separation-positive flotation. Poor) and the constraints of flotation reage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/004B03D1/002B03B1/00B03D101/06B03D101/02B03D101/04B03D103/02
Inventor 孙伟胡岳华邓美姣黄红军易峦
Owner CENT SOUTH UNIV
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