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Method for preparing high-performance building sand by desalting sea sand

A construction sand and high-performance technology, applied in chemical instruments and methods, inorganic chemistry, seawater treatment, etc., can solve the problems of sea sand particles not meeting the standards, high chlorine content of sea sand, etc., to improve the ability to store impurities, Low chloride ion content, good effect

Active Publication Date: 2017-02-15
SECOND INST OF OCEANOGRAPHY MNR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiencies of the prior art, and to provide a method for preparing high-performance construction sand by desalinating sea sand. This method aims to solve the problems that the chlorine content in sea sand is too high and the sea sand particles do not meet the standards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing high-performance building sand from desalinated sea sand, the method comprising the steps of:

[0034] The first step is to prepare sea sand desalination water;

[0035] (1) Pretreatment: Introduce the near seawater to the reservoir, add water-insoluble dextran of 1% mass of the total volume of the stored seawater, stir well, and naturally flocculate and settle at room temperature for 8 hours;

[0036] (2) Purification: The pretreated offshore seawater in step (1) is pumped into the filter tower, which is filled with modified coral sand filler, and the pretreated offshore seawater is adsorbed and purified by the filler in the filter tower to fully remove Chloride ions and impurities to obtain sea sand desalination water;

[0037] The processing method of described modified coral sand filler is as follows:

[0038] (a) Crush the coral sand, select the coral sand with a particle size range of 0.6-0.8mm, wash it with sea water to remove visible imp...

Embodiment 2

[0048] A method for preparing high-performance building sand from desalinated sea sand, the method comprising the steps of:

[0049] The first step is to prepare sea sand desalination water;

[0050] (1) Pretreatment: lead the near seawater to the reservoir, add water-insoluble dextran with the total volume of the stored seawater: 2.5% by mass, stir well, and naturally flocculate and settle at room temperature for 6 hours;

[0051] (2) Purification: The pretreated offshore seawater in step (1) is pumped into the filter tower, which is filled with modified coral sand filler, and the pretreated offshore seawater is adsorbed and purified by the filler in the filter tower to fully remove Chloride ions and impurities to obtain sea sand desalination water;

[0052] The processing method of described modified coral sand filler is as follows:

[0053] (a) Crush the coral sand, select the coral sand with a particle size range of 0.6-0.8mm, wash it with sea water to remove visible imp...

Embodiment 3

[0063] A method for preparing high-performance building sand from desalinated sea sand, the method comprising the steps of:

[0064] The first step is to prepare sea sand desalination water;

[0065] (1) Pretreatment: Introduce the near seawater to the reservoir, add water-insoluble dextran with a mass of 1.5% of the total volume of the stored seawater, stir well, and naturally flocculate and settle at room temperature for 7 hours;

[0066] (2) Purification: The pretreated offshore seawater in step (1) is pumped into the filter tower, which is filled with modified coral sand filler, and the pretreated offshore seawater is adsorbed and purified by the filler in the filter tower to fully remove Chloride ions and impurities to obtain sea sand desalination water;

[0067] The processing method of described modified coral sand filler is as follows:

[0068] (a) Crush the coral sand, select the coral sand with a particle size range of 0.6-0.8mm, wash it with sea water to remove vi...

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Abstract

The invention relates to a method for preparing high-performance building sand by desalting sea sand. The method includes the steps of 1), preparing sea sand desalting water; 2), performing desalting treatment on the sea sand: (1), prescreening of the sea sand; (2), sea sand water purification, namely, proportionally mixing the sea sand in (1) of the second step with the sea sand desalting water according to quality to volume ratio of 3:5-8, adding a moderate amount of kieselguhr, activated carbon and organic bentonite and performing stir treatment for 3-6 hours under the normal temperature; (3), separation, namely, draining off the sea sand subjected to purification treatment in (2) of the second step; (4), heat treatment, namely performing heating treatment on the drained sea sand in (3) of the second step for 1-1.5 hours under the temperature of 120-150DEG C, and then performing screening to remove kieselguhr, activated carbon and organic bentonite to obtain finished products of the desalted sea sand. The method used for sea sand desalting is high in treatment efficiency, good in effect and low in content of chloridion of the treated sea sand which can be used for high-performance building materials.

Description

technical field [0001] The invention relates to a method for preparing high-performance building sand from desalinated sea sand, which belongs to the technical field of sea sand treatment and preparation of building materials. Background technique [0002] With the large-scale economic and social construction in our country, the river sand used in the construction field is facing an increasingly severe shortage situation, and it is imminent to seek a sea sand desalination method and device with significant economic benefits in coastal areas. Some countries in the world have used sea sand in the construction field for a long time, especially in some coastal island countries. Most of the construction sand comes from sea sand, but because the content of chloride ions in sea sand is too high, It is easy to corrode the steel bars and other materials in the building, and sea sand that is too coarse or too fine is not suitable for building construction. Therefore, sea sand should b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/04C04B20/02C04B14/06B01J20/22B01J20/28B01J20/30C02F9/04C02F101/12C02F103/08
CPCB01J20/043B01J20/14B01J20/22B01J20/28009C02F1/28C02F1/56C02F2101/12C02F2103/08C04B20/04C04B20/023C04B14/06
Inventor 谭勇华程杰吕兑安
Owner SECOND INST OF OCEANOGRAPHY MNR
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