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Method for comprehensive utilization of sulfur iron ore

A technology of pyrite and sulfuric acid, applied in sulfur compounds, aluminum-sulfur compounds, chemical instruments and methods, etc., can solve the problems of low product yield, secondary pollution, and adapt to market needs, so as to expand the sulfuric acid market and solve the problems of secondary pollution and improve economic efficiency

Inactive Publication Date: 2006-01-11
孔凡逸
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  • Application Information

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Problems solved by technology

This patent has the following deficiencies: ① Due to the different origins of pyrite, the contents of iron and aluminum in the slag are different, so that the contents of iron sulfate and aluminum sulfate in the final product polyaluminum ferric sulfate cannot be adjusted, and the product cannot meet the needs of the market; ② The waste slag is not crushed and the reaction is only maintained by the dilution of sulfuric acid, so the reaction is not complete; ③The reactant cannot be fully extracted by using the flocculant for three natural sedimentation, the product yield is low, and the final flocculation sediment is untreated, causing secondary pollution

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  • Method for comprehensive utilization of sulfur iron ore
  • Method for comprehensive utilization of sulfur iron ore

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Embodiment

[0018] (1) with Al 2 o 3 714kg of 70% calcined bauxite was added, and 1500kg of secondary clear liquid was added and pulverized with a wet vibrating mill until all passed through 200 mesh.

[0019] (2) to 5M 3 The reaction kettle is injected with 1700kg of secondary clear liquid, and then the slurry of (1) is injected into the reaction kettle, and stirred evenly.

[0020] (3) After sealing the reactor, inject 650 kg of 98% sulfuric acid with an acid-proof pump, and react for 40 minutes.

[0021] (4) Pump 650 kg of 98% sulfuric acid into the reactor, maintain the reaction temperature at 150±15° C. and the pressure at 0.2 to 0.35 MPa, and react for three hours.

[0022] (5) Pump hot water (80-90°C) into the jacket of the reaction kettle, and forcefully cool down to below 120°C.

[0023] (6) Inject 3200kg of secondary clear liquid in the diluting tank in advance, open the bottom valve of the reaction kettle (the bottom valve leads to the bottom of the diluting tank) to mix th...

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Abstract

A method for comprehensive utilization of troilite includes conventionally preparing sulfuric acid from troilite, reaction between sulfuric acid and bauxite to prepare liquid aluminium sulfate, magnetic separation of sulfuric acid dregs, pulverizing, reaction between said liquid aluminium sulfate and sulfuric acid, press fitlering, oxidizing the filtrate to obtain aluminium iron polysulfate as water cleaning agent, vacuum concentrating and spray drying to obtain its powdered product.

Description

technical field [0001] The invention relates to a technique for producing a polyaluminum ferric sulfate water purifying agent with high value by utilizing the slag after sulfuric acid is prepared from pyrite, and belongs to the technical field of deep processing of pyrite. Background technique [0002] At present, in factories using pyrite to produce sulfuric acid, the slag (waste residue) produced during the production process contains 30-40% iron, which is not suitable for direct smelting because the iron content is low and contains about 1-3% sulfur; It has been reported that products such as iron oxide red are produced by using slag, but it cannot be popularized and applied because of the poor color of the product. At present, most of the cinders from sulfuric acid plants are sold to cement plants at very low prices as fillers. [0003] Chinese patent CN1337356A discloses a "production process of composite water purifying agent polyaluminum ferric sulfate", which uses t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C01B17/74C01F7/74
Inventor 孔凡逸黄成基吴纪芬江伟洪孔祥坚
Owner 孔凡逸