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A process for preparing aluminum-silicon solution by dissolution of laterite nickel ore smelting slag

A technology of laterite nickel ore and process method, applied in the fields of environment and materials, can solve the problems of low process efficiency and long time consumption, and achieve the effects of making full use of, improving the recovery rate and shortening the process operation time.

Active Publication Date: 2020-11-27
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process takes a long time, the process efficiency is low, and it is necessary to add NaAlO with a high price 2 to adjust the molar ratio of silicon to aluminum

Method used

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  • A process for preparing aluminum-silicon solution by dissolution of laterite nickel ore smelting slag
  • A process for preparing aluminum-silicon solution by dissolution of laterite nickel ore smelting slag
  • A process for preparing aluminum-silicon solution by dissolution of laterite nickel ore smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] XRD analysis of metallurgical slag raw materials such as figure 1 As shown, the main phase composition of laterite nickel slag is (Mg,Fe) 2 SiO 4 , MgAl 2 o 4 , (Mg,Al)SiO 3 etc., its chemical composition is as shown in Table 1;

[0025] Table 1 Chemical analysis results (mass fraction) of laterite nickel ore metallurgical slag

[0026]

[0027] Crushing and grinding: The solid laterite nickel ore smelting slag is broken and ground to about 200 mesh.

[0028] Ingredients mixing: finely ground smelting slag and solid Na 2 CO 3 Mix with NaOH in a ratio of 3:7:10.

[0029] High-temperature alkali fusion: Put the above-mentioned mixture in a container, heat it to 600°C and keep it warm for 40 minutes, take it out and cool it, crush it and grind it for later use.

[0030] Water immersion: Add about 4% Al(OH) to the above alkali-melted material 3 , leached with deionized water, and kept at 80° C. for 45 minutes to obtain a crude aluminum-silicon eluate mixed with...

Embodiment 2

[0033] Metallurgical slag raw material is identical with embodiment 2.

[0034] Crushing and grinding: The solid laterite nickel ore smelting slag is broken and ground to about 200 mesh.

[0035] Ingredients mixing: finely ground smelting slag and solid Na 2 CO 3 Mix with NaOH in a ratio of 3:7:10.

[0036] High-temperature alkali fusion: Put the above-mentioned mixture in a container, heat it to 600°C and keep it warm for 40 minutes, take it out and cool it, crush it and grind it for later use.

[0037] Mechanical stirring water immersion: add about 4% Al(OH) to the above alkali-melted material 3 , leached with deionized water, applied strong mechanical agitation (500r / min), and kept at 80°C for 45 minutes to obtain a crude aluminum-silicon elution liquid mixed with liquid and solid.

[0038] Solid-liquid separation: The above-mentioned crude aluminum-silicon eluate mixed with water-slag is subjected to suction filtration for liquid-solid separation to obtain aluminum-sil...

Embodiment 3

[0040] The metallurgical slag raw material is the same as that in Examples 1 and 2; crushing and grinding: the solid laterite nickel ore smelting slag is crushed and ground to about 200 mesh.

[0041] Ingredients mixing: finely ground smelting slag and solid Na 2 CO 3 Mix with NaOH in a ratio of 3:7.5:10.5.

[0042] High-temperature alkali fusion: Put the above-mentioned mixture in a container, heat it to 600°C and keep it warm for 40 minutes, take it out and cool it, crush it and grind it for later use.

[0043] Ultrasonic enhanced water immersion: Add about 4% Al(OH) to the above alkali-melted material 3 , leaching with deionized water, applying ultrasonication (intermittent mode, alternately on for 3min-off for 1.5min), and after maintaining at 80°C for 45min, a crude aluminum-silicon elution liquid mixed with liquid and solid was obtained.

[0044]Solid-liquid separation: The above-mentioned crude aluminum-silicon eluate mixed with water-slag is subjected to suction fil...

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Abstract

The invention belongs to the technical fields of environment and materials and relates to a process method for preparing an aluminum-silicon solution by taking smelting slags of laterite-nickel ores as raw materials. The process method comprises the following steps: performing alkali fusion on metallurgy waste residues of the laterite-nickel ores, intensifying a water logging process with ultrasound and adding Al(OH)3 as an aluminum source for adjusting the silicon-aluminum molar ratio to obtain a water-slag mixed crude aluminum-silicon dissolution solution; performing extraction filtration and liquid-solid separation to obtain the aluminum-silicon solution and solid-state filter residues at a certain molar ratio respectively. The process method has the benefits that the recovery rates ofSi and Al are increased by 44% and 65% respectively, and the particle size of filter residue particles treated by the ultrasound is smaller than that of the particles that are not treated by the ultrasound and are stirred mechanically, so that valuable metals, namely aluminum and silicon, in the laterite-nickel ores can be fully dissolved out and recycled; through independent or combined use of the ultrasound and the intensifying of the water logging process with the ultrasound, and a method for adjusting the silicon-aluminum molar ratio in the solution by effectively utilizing a low-valence aluminum source, the resources of the metallurgy waste residues of the laterite-nickel ores are utilized efficiently at low cost, the harm to the ecological environment is reduced, and the economic andenvironmental benefits of a process technology of comprehensive utilization of the metallurgy waste residues of the laterite-nickel ores are improved.

Description

technical field [0001] The invention belongs to the technical field of environment and materials, and relates to a process method for preparing aluminum-silicon solution by using laterite nickel ore smelting slag as raw material. Background technique [0002] With the gradual expansion of the scale of pyrometallurgy of nickel-iron alloys in laterite mines, the discharge of smelting waste residues has gradually increased. The current process of processing the slag mainly adopts water quenching and stockpiling, which not only occupies a large amount of land, but also pollutes the atmosphere, soil and groundwater sources. On the other hand, laterite nickel ore contains a large amount of valuable components such as aluminum and silicon, and its comprehensive recycling can produce a variety of high value-added products, reduce waste emissions, and conform to circular economy, clean production and improved Requirements for the comprehensive utilization rate of mineral resources. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02C22B7/04B09B3/00
CPCB09B3/00C01B39/02C22B7/006C22B7/04Y02P10/20
Inventor 薛济来刘轩张鹏举方东根
Owner UNIV OF SCI & TECH BEIJING
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