Kieselguhr-nickel slag composite adsorption material capable of recovering heavy metal ions and preparation of composite adsorption material

A technology of composite adsorption materials and heavy metal ions, which is applied in the fields of adsorbing water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problems of environmental pollution, low utilization rate of limestone, etc. The effect of social benefit and low production cost

Active Publication Date: 2014-05-28
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a diatomite-nickel slag composite adsorption material capable of recovering heavy metal ions and its preparation for the waste nickel slag, diatomite, and limestone produced by smelting nickel-iron alloys, which have low utilization rates and pollute the environment. method

Method used

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  • Kieselguhr-nickel slag composite adsorption material capable of recovering heavy metal ions and preparation of composite adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight ratio of the raw material formula in this example: nickel slag is 50wt%, diatomaceous earth is 40wt%, and limestone is 10wt%. Weigh the two raw materials according to the formula, place them in a ball mill and grind them for 12 hours. The ground slurry is filtered and dehydrated, dried and crushed at 100°C to obtain a total material of less than 30 meshes; add the binder polyvinyl alcohol (PVA), and the dosage is 18wt% of the total material; mix evenly in the mixer, trap the material for 12 hours, and press the mixture into shape; the formed sample is dried at 100 ° C for 12 hours; the sample is placed in a muffle furnace for reaction sintering, and the reaction sintering temperature is 800°C, the holding time is 3 hours, and the furnace is cooled to room temperature to obtain the prepared composite material.

[0024] The prepared composite material was subjected to the adsorption experiment of heavy metal ions in wastewater. The ratio of adsorbent sample / was...

Embodiment 2

[0026] The weight ratio of the raw material formula in this example: nickel slag is 40wt%, diatomaceous earth is 40wt%, and limestone is 20wt%. Weigh the two raw materials according to the formula, place them in a ball mill and grind for 13 hours, filter and dehydrate the ground slurry, dry and crush at 110°C, and obtain a total material of less than 30 meshes; add binder PVA, the amount is 15wt% of the total material ; Mix evenly in the mixer, trap the material for 10 hours, and press the mixed material to form; the formed sample is dried at 110°C for 12 hours; the sample is placed in a muffle furnace for reaction sintering, the reaction sintering temperature is 850°C, and the holding time for 3 hours, and cooled to room temperature with the furnace to obtain the prepared composite material.

[0027] The prepared composite material was subjected to the adsorption experiment of heavy metal ions in wastewater. The ratio of adsorbent sample / wastewater dosage was 1g / 25mL. The ads...

Embodiment 3

[0029] The weight ratio of the raw material formula in this example: nickel slag is 50wt%, diatomaceous earth is 30wt%, and limestone is 20wt%. Weigh the two raw materials according to the formula, place them in a ball mill and grind for 15 hours, filter and dehydrate the ground slurry, dry and crush at 90°C, and obtain a total material of less than 30 meshes; add the binder PVA, and the dosage is 12wt% of the total material ; Mix evenly in the mixer, trap the material for 14 hours, and press the mixture into shape; dry the formed sample at 90°C for 12 hours; place the sample in a muffle furnace for reaction sintering, the reaction sintering temperature is 900°C, and keep warm The time is 5 hours, and the furnace is cooled to room temperature to obtain the prepared composite material.

[0030]The prepared composite material was subjected to the adsorption experiment of heavy metal ions in wastewater. The ratio of adsorbent sample / wastewater dosage was 1g / 25mL. The adsorption e...

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Abstract

The invention discloses a kieselguhr-nickel slag composite adsorption material capable of recovering heavy metal ions and preparation of the composite adsorption material. Raw materials of the composite adsorption material come from waste nickel slag produced during smelting of a nickel-iron alloy, kieselguhr and limestone. A preparation method of the composite adsorption material comprises the steps as follows: the waste nickel slag produced during smelting of the nickel-iron alloy, the kieselguhr and the limestone are used as the raw materials, and the kieselguhr-nickel slag composite adsorption material capable of recovering the heavy metal ions are prepared through raw material mixing, compression moulding and high-temperature reaction. The material prepared with the method has the advantages that the material is large in specific surface area, high in heavy metal ion removal efficiency, not prone to damage and the like, the severe pollution caused by the waste nickel slag produced during smelting of the nickel-iron alloy to the environment is eliminated, the production cost is saved, the economic benefit is significant, and the material has popularization and application values. The kieselguhr-nickel slag composite adsorption material has the good performance, such as the stability and the like as well as the high adsorption rate in treatment of the heavy metal ions in wastewater, so that the composite adsorption material has the broad application prospect in the aspect of wastewater treatment.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste, and in particular relates to a diatomite-nickel slag composite adsorption material capable of recovering heavy metal ions and a preparation method thereof. Background technique [0002] With the rapid growth of the world's demand for nickel alloys, the output of nickel alloys in my country has ranked first in the world for many years in a row. With economic growth, the total amount of smelting slag discharged every year is also increasing. The large amount of waste slag produced during the smelting process is currently mainly The only treatment method is landfill, which will not only cause a huge waste of metal resources, but also cause serious pollution to the ecological environment. Taking Jinchuan Group Corporation, the largest nickel ore production and processing enterprise in my country, as an example, the total amount of smelting slag discharged every year is only 1000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/30C02F1/28
Inventor 于岩张庭士庄国鑫郭思怡符成吴琼
Owner FUZHOU UNIV
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