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Iron and aluminum complex ore comprehensive utilization method

A composite ore, iron and aluminum technology, applied in the field of industry, can solve problems such as unsatisfactory, and achieve the effect of comprehensive utilization of mineral resources

Inactive Publication Date: 2009-06-10
GUANGXI INVESTMENT GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum-silicon ratio of iron-aluminum composite ore smelted in a blast furnace is between 1.6 and 1.9, which cannot meet the requirements of this process

Method used

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  • Iron and aluminum complex ore comprehensive utilization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] With reference to Fig. 1, the method for comprehensive utilization of iron-aluminum composite ore of the present invention, its steps are:

[0026] Divide the components into: Al 2 O 3 15~40wt%, Fe 2 O 3 30~50wt%, SiO 2 4~15wt% of iron-aluminum composite ore, limestone powder, coke powder by weight ratio of sinter basicity CaO / SiO 2 = 3.0~8.0, sinter with sintering machine, the sintering operation conditions are: ignition temperature 1100℃, ignition fuel is blast furnace gas, sintering negative pressure 10kPa, sintering time 20~30 minutes, obtain high basicity sintering mine. High basicity sinter composition: TFe 33wt%, Al 2 O 3 24wt%, CaO 32wt%, SiO 2 10wt%.

[0027] High basicity sintered ore is crushed and sieved to a particle size of 5-70mm, and the basicity of blast furnace slag is CaO / SiO by weight. 2 = 2.5~6.0, add certain coke and limestone for blast furnace smelting, and control the furnace temperature at 1450~1600℃. At this time, the separation...

Embodiment 2

[0038] In this embodiment, the aluminum leaching tailings are used as different parameter test conditions for the production of cement raw materials, cement admixtures and concrete fine admixtures: the rest of the conditions are the same as in Example 1.

[0039] The aluminum leaching tailings are mixed with limestone and auxiliary materials in a weight ratio of 45:35:20, calcined at 1100-1500°C, and the cement is produced by a rapid cooling process. The physical and chemical indicators of the cement products produced all reach 52.5P·I silicic acid Salt cement standard.

[0040] When the aluminized tailing slag is used as a cement admixture in an amount of 30wt%, the prepared cement can meet the requirements of 42.5 cement strength grades.

[0041] When the leaching tailings are used as concrete fine admixture, when the dosage is 15wt%, the prepared concrete samples are all qualified after 20 freeze-thaw cycles, and there is no obvious change in the strength loss and mass loss...

Embodiment 3

[0043] In this embodiment, the aluminum leaching slag is used as another different parameter test condition for producing cement raw material, cement admixture and concrete fine admixture: other conditions are the same as in embodiment 1.

[0044] The aluminum leaching tailings are mixed with limestone and auxiliary materials in a weight ratio of 60:35:10, calcined at 1100-1500°C, and the cement is produced by a rapid cooling process. The physical and chemical indicators of the produced cement products all reach 52.5P·I silicic acid Salt cement standard.

[0045] When the aluminized tailing slag is used as a cement admixture in an amount of 45wt%, the prepared cement can meet the requirements of 42.5 cement strength grades.

[0046] When the leaching tailings are used as concrete fine admixture, when the dosage is 25wt%, the prepared concrete samples are all qualified after 20 freeze-thaw cycles, and there is no obvious change in the strength loss and mass loss.

[0047] The ...

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Abstract

The invention relates to a method for comprehensively utilizing iron-aluminum composite mineral resources, which is to mix ferro-aluminum composite ores, limestone powder and coke powder according to proportion for ore proportioning, to sinter the mixture under the suction negative pressure between 3 and 10 kPa and with the sintering time between 20 and 30 minutes, to perform blast furnace process on high-basicity sintered ores obtained after sintering, coke and limestone according to the fact that the slag basicity CaO / SiO2 is equal to 2.5-6.0 by weight ratio to obtain pig-iron products and calcium aluminate slag, to use a sodium carbonate solution to leach out the calcium aluminate slag after pulverization, to obtain a sodium aluminate solution and immersed aluminum tailings by performing solid-liquid separation, washing and desiliconization on leached slurry, to prepare aluminum hydroxide by performing carbonating decomposition on the sodium aluminate solution, and to obtain alumina products by roasting the aluminum hydroxide, wherein the immersed aluminum tailings can be used as cement industrial materials. The method can simultaneously recover valuable elements such as iron, aluminum, vanadium and gallium in the iron-aluminum composite ores. Moreover, the immersed aluminum tailings, blast furnace gas and hot-blast furnace gas are effectively utilized.

Description

technical field [0001] The invention relates to the technical fields of iron and steel metallurgy, non-ferrous metal metallurgy, cement production and the like. The invention is a comprehensive utilization method for extracting iron and aluminum from iron-aluminum composite ore and producing cement industrial materials from leaching aluminum tailings. Background technique [0002] According to relevant information, iron-aluminum composite ore is widely distributed in some provinces and regions in southern my country, and the total resources in these areas amount to hundreds of millions of tons. The mine is mainly composed of gibbsite, goethite, hematite and kaolin, and the sum of the four is 80-85%. 2 O 3 15~40%, Fe 2 O 3 30~50%, SiO 2 4-15%, and its useful minerals account for more than 75%, and it also contains rare metals such as vanadium and gallium. It is a new type of comprehensive utilization of mineral resources with great potential. [0003] For more than 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/22
CPCC04B7/22
Inventor 傅强瞿雷雷伟明覃用宁
Owner GUANGXI INVESTMENT GROUP
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