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Method for extracting ferric oxide from tailings

A technology of iron oxide and tailings, applied in the field of metallurgy, can solve the problems of unrecycled titano-magnetite, complex properties, serious symbiosis, etc., and achieve the effect of strengthening environmental protection, less equipment investment, and expanding production capacity

Inactive Publication Date: 2017-12-26
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The vanadium-titanium magnetite tailings in the Panxi area have the characteristics of fine particle size, various types, complex properties, and serious symbiosis. There are still a large amount of titanium magnetite in the tailings that has not been recycled.

Method used

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  • Method for extracting ferric oxide from tailings
  • Method for extracting ferric oxide from tailings
  • Method for extracting ferric oxide from tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, the chemical multi-element analysis of the tailings was carried out, and the analysis results are shown in Table 1.

[0034] Table 1 Results of tailings chemical multi-element analysis

[0035]

[0036]

[0037] Note: TFe---refers to FeO and Fe in tailings 2 o 3 The sum of the mass of ionic iron in the mass, the mass without oxygen, the reason is that it is generally difficult to combine FeO and Fe in chemical analysis 2 o 3 The amount of iron ions is measured separately, so only the total amount of iron ions can be measured.

[0038] It can be seen from the above table that the content of TFe in the tailings is 9.16%. Although most of the iron is removed, some iron still exists in the tailings.

[0039] First, take 1000g of the above-mentioned tailings and mix them with 620g of sodium hydroxide and place them in a reactor, control the melting reaction temperature to 480°C, and the melting reaction time to 50min, and obtain a mixed solid phase after mel...

Embodiment 2

[0052] First, take 1000g of the same tailings as in Example 1 and mix them with 620g of sodium hydroxide and place them in a reactor, control the melting reaction temperature to 480°C, and the melting reaction time to 50min, and obtain a mixed solid phase after melting and decomposition.

[0053] The mixed solid phase obtained in the above steps is fully washed with water at a temperature of 30° C., filtered to remove the dilute lye, and dried at room temperature to obtain the modified ore.

[0054] Step 1: Weigh 500g of the above-mentioned modified ore, and measure 275ml of water.

[0055] Step 2: Clean the grinder.

[0056] Step 3: Put 500g of tailings into the grinding machine, add 275ml of water at the same time, set the grinding time for grinding, and the grinding time is 3 minutes.

[0057] Step 4: Take out all the pulp in the grinding machine, use a 200-mesh (0.074mm) sieve to carry out wet sieving in a basin filled with clean water, and obtain the on-sieve product and...

Embodiment 3

[0065] First, take 1000g of the same tailings as in Example 1 and mix them with 620g of sodium hydroxide and place them in a reactor, control the melting reaction temperature to 480°C, and the melting reaction time to 50min, and obtain a mixed solid phase after melting and decomposition.

[0066] The mixed solid phase obtained in the above steps is fully washed with water at a temperature of 30° C., filtered to remove the dilute lye, and dried at room temperature to obtain the modified ore.

[0067] Step 1: Weigh a portion of 500g of modified ore that has been ground for 3 minutes, and measure 750ml of water.

[0068] Step 2: Mix one part of modified ore with one part of 750ml water to prepare a slurry with a concentration of 40%.

[0069] Step 3: Clean the magnetic separator, start the drum, set the current of the magnetic field strength to 4.5A, and feed the ore pulp into the ore feeding port of the magnetic separator at a uniform speed. After feeding the ore, turn off the p...

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Abstract

The invention relates to a method for extracting ferric oxide from tailings and belongs to the field of metallurgy. The method for extracting the ferric oxide from the tailings comprises the following steps that a, chemical treatment is conducted, specifically, the tailings and sodium hydroxide are mixed and subjected to a melting reaction for 35-85 min at the temperature of 360-590 DEG C; b, washing and filtering are conducted, specifically, reaction products are washed up through water with the temperature of 30-45 DEG C and filtered to obtain modified ores; c, ore grinding is conducted, specifically, the modified ores are subjected to ball milling for 1-5 min and screened with a wet screen of 200 meshes, and the screened-down ores are taken; and d, magnetic separation is conducted, specifically, the screened-down ores are prepared into ore pulp with the mass concentration being 20-50%, magnetic separation is conducted under the magnetic-field strength of 0.5-6 A, and iron concentrate is obtained. Through the method for extracting the ferric oxide from the tailings, the tailings can be effectively subjected to separation and enrichment, so that ferric oxide of a certain grade is obtained, and the TFe grade can reach about 68%.

Description

technical field [0001] The invention relates to a method for extracting iron oxide from tailings, which belongs to the field of metallurgy. Background technique [0002] China's titanium resources rank first in the world, accounting for about 40% of the world's titanium resources, about 90% of which are concentrated in Panzhihua, TiO 2 Reserves amounted to 873 million tons. Since the development and construction of Panzhihua City, the state has attached great importance to the development and utilization of titanium resources. However, the symbiosis of vanadium-titanium magnetite in Panzhihua is serious, and the content of other useless chemical substances is high, so it is very difficult to comprehensively select and utilize. It is very urgent to turn the waste of Majiatian tailings into treasure and reuse it. [0003] At present, the Majiatian tailings pond in Panzhihua has accumulated hundreds of millions of tons of vanadium-titanium magnetite tailings selected over the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30C22B1/00C22B34/12
CPCB03C1/30C22B1/00C22B34/12
Inventor 邹建新
Owner PANZHIHUA UNIV
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