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A kind of preparation method of heavy metal ion remover

A technology of heavy metal ions and removers, applied in the direction of non-metallic elements, chemical instruments and methods, silicon compounds, etc., can solve the problems of secondary pollution, high cost of chemical agents, etc., achieve low cost, increase economic added value, and easy operation Effect

Active Publication Date: 2019-12-13
YANGTZE NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a preparation method of a heavy metal ion remover, using waste hardened cement concrete as raw material, to solve the secondary pollution of waste hardened cement concrete, and to provide resources for the realization of resource utilization. A new approach; at the same time, it solves the problem of high cost of using chemicals for heavy metal wastewater treatment

Method used

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  • A kind of preparation method of heavy metal ion remover
  • A kind of preparation method of heavy metal ion remover
  • A kind of preparation method of heavy metal ion remover

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Embodiment 1

[0030] Embodiment 1: a kind of preparation method of heavy metal ion remover, comprises the steps:

[0031] 1. Select waste concrete from construction waste, and use a small hammer crusher for primary crushing. The waste concrete after primary crushing is put into a resistance furnace for pre-calcination, and it is calcined at 400 ° C for 35 minutes, and there is a situation of interfacial micro-crack penetration. , the ideal separation situation has been reached at this time.

[0032] 2. Vibrate the waste concrete in an electromagnetic vibrating pulverizer to separate coarse aggregate and scrap.

[0033]3. Put the separated crushed material into the ball mill; in order to further increase the specific surface area of ​​hardened cement stone and increase its surface activity, the cement stone separated by sieving is added to the ball mill for ball milling for 20 minutes. During the ball milling process, a compound grinding aid composed of lignosulfonate, ethylene glycol, and ...

Embodiment 2

[0035] Embodiment 2: a kind of preparation method of heavy metal ion remover, comprises the steps:

[0036] 1. Select waste concrete from construction waste, and use a small hammer crusher for primary crushing to control the output particle size to ≤10mm. The waste concrete after primary crushing is put into a corundum crucible and put into a box-type resistance furnace in different Pre-burning is carried out under the temperature system, and the pre-burning temperature is controlled at 400°C. After the temperature of the furnace is lowered to 100°C, take it out, transfer it to a desiccator to cool to room temperature, weigh it with an electronic scale, and record the reading.

[0037] 2. Add an appropriate amount of waste concrete each time to crush and separate in the electromagnetic vibrating pulverizer, and control the time of shaking. After shaking and separating, pour it into a square hole sieve to separate the coarse aggregate from the waste cement stone; shake The tim...

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Abstract

The invention provides a preparation method of a heavy metal ion remover. Discarded hardened cement concrete is used as a raw material. The preparation method comprises the steps: primary crushing andpresintering; smashing and separation; ball milling and activation; and powder separation. Heavy metal ions in wastewater containing copper, zinc, chromium, nickel and the like can be effectively removed, and an implementation process of a technical method has the advantages that the speed for removing the heavy metal ions is high, the reaction time is short, the removal effect is stable, and themethod can be operated at room temperature. The technical application of a building waste, namely hardened cement stone in discarded concrete, is widened to the field of heavy metal sewage treatment,no problem of limit mixing amount exists, the recycling efficiency of the discarded cement stone is increased, and the economic additional value of the discarded cement stone is increased.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization and heavy metal wastewater treatment, in particular to a heavy metal wastewater remover based on waste hardened cement stone, a preparation method and an application. Background technique [0002] A large amount of construction waste will be generated in the construction of buildings or structures, decoration, demolition and other construction activities, and with the rapid advancement of my country's infrastructure and the acceleration of urbanization, the amount of construction waste continues to increase. According to statistics, about 1 / 3 of urban waste is construction waste; by the end of 2011, its stock has exceeded 2 billion tons, and the annual increase of construction waste exceeds 300 million tons. Due to improper site selection or temporary stacking of construction waste landfill plants in most cities, it not only causes a lot of waste of land resources but also poses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10C02F101/20
CPCB01J20/06B01J20/103B01J2220/4887C02F2101/20
Inventor 刘东升周丽新陈昔勇时建伟吕利平刘艳
Owner YANGTZE NORMAL UNIVERSITY
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