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A kind of soil water-retaining agent produced by utilizing aluminum ash and its preparation method

A soil water-retaining agent and aluminum ash technology, which is applied in the field of agricultural resource utilization of aluminum ash, can solve the problems of low efficiency of aluminum ash resource utilization, insufficient technical level, etc., achieve high-efficiency comprehensive utilization level, improve economic benefits, reduce Harmful effect

Active Publication Date: 2022-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the low utilization efficiency of existing aluminum ash resources and the insufficient advanced technical level. The present invention provides a soil water-retaining agent produced by using aluminum ash and its preparation method

Method used

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  • A kind of soil water-retaining agent produced by utilizing aluminum ash and its preparation method
  • A kind of soil water-retaining agent produced by utilizing aluminum ash and its preparation method
  • A kind of soil water-retaining agent produced by utilizing aluminum ash and its preparation method

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Effect test

Embodiment 1

[0044] A kind of preparation method of the soil water-retaining agent that utilizes aluminium ash to produce, comprises the steps (refer to Figure 5 shown):

[0045] (1) it is 0.1mol / L nitric acid solution to mix the aluminum ash after the aluminum extraction and the concentration, the mass volume ratio of the aluminum ash after the aluminum extraction and the nitric acid solution is 1:1 g / mL, stirring treatment (rotating speed is 50rpm, The time is 10min), then ultrasonic treatment (ultrasonic time is 30min), the shaker shakes and disperses evenly (the rotation speed is 100r / min, the time is 10min), and it is allowed to stand (the standstill time is 1h), and the first vacuum filtration is obtained. The first filtrate and the first filter residue;

[0046] (2) adding 100mL concentration of sodium sulfide solution of 0.1mol / L to the first filtrate described in step (1), the volume ratio of the first time filtrate and sodium sulfide solution is 1:1, and mixing is uniform to ob...

Embodiment 2

[0052] A preparation method of a soil water-retaining agent produced by utilizing aluminum ash, comprising the following steps:

[0053] (1) be 0.3mol / L nitric acid solution mixing with the aluminum ash after the aluminum extraction and concentration, the mass volume ratio of the aluminum ash after the described aluminum extraction and the nitric acid solution is 1:5g / mL, stirring process (rotating speed is 100rpm, The time is 30min), then ultrasonic treatment (ultrasonic time is 30min), the shaking table shakes and disperses evenly (rotation speed is 150r / min, time is 10min), stand (standstill time is 5h), vacuum filtration for the first time, get The first filtrate and the first filter residue;

[0054] (2) adding 100mL of sodium sulfide solution that the concentration is 1.0mol / L in the first time filtrate of step (1), the volume ratio of the first time filtrate and sodium sulfide solution is 1:2, mix homogeneously, obtain The mixed solution is allowed to stand (the stands...

Embodiment 3

[0060] A preparation method of a soil water-retaining agent produced by utilizing aluminum ash, comprising the following steps:

[0061] (1) it is 0.5mol / L nitric acid solution to mix the aluminum ash after the aluminum extraction and the concentration, the mass volume ratio of the aluminum ash after the aluminum extraction and the nitric acid solution is 1:10g / mL, stirring treatment (rotating speed is 100rpm, The time is 20min), then ultrasonic treatment (ultrasonic time is 30min), the shaker shakes and disperses evenly (the rotation speed is 100r / min, the time is 30min), and it is allowed to stand (the standstill time is 5h), and the first vacuum filtration is obtained. The first filtrate and the first filter residue;

[0062] (2) adding 100mL concentration of sodium sulfide solution to the first filtrate described in step (1) is 5.0mol / L, the volume ratio of the first time filtrate and sodium sulfide solution is 1:10, and mixing is uniform to obtain The mixed solution is a...

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Abstract

The invention discloses a soil water-retaining agent produced by using aluminum ash and a preparation method thereof. The method comprises: respectively adding dilute nitric acid and sodium sulfide solution to the aluminum ash to remove the heavy metals in the aluminum ash, and the content reaches the agricultural heavy metal limit standard; secondly, mixing and grinding the aluminum ash from which the heavy metals have been removed and the calcium-based compound; fully mixing After the material is activated at high temperature, a material with calcium sulfoaluminate as the main mineral component is obtained; finally, under hydration conditions, a soil with weak alkali characteristics is obtained with ettringite with 32 crystal waters as the main mineral component Aquasorb. The product can be used in drought resistance and soil improvement in arid and semi-arid areas. The invention realizes the high-efficiency agricultural comprehensive utilization of aluminum ash, a secondary by-product of aluminum extraction, and provides a scientific method for reducing the storage of aluminum ash and making full use of aluminum resources; the prepared ettringite water-retaining agent has a certain soil water-retaining capacity , the long-term water retention effect is good, and the production cost of the product is low.

Description

technical field [0001] The invention relates to the technical field of agricultural resource utilization of aluminum ash, in particular to a soil water-retaining agent produced by utilizing aluminum ash and a preparation method thereof. Background technique [0002] Aluminium slag is a solid waste produced during the production, consumption and reuse of non-ferrous metal aluminum. With the continuous expansion of the production scale of my country's aluminum industry and the continuous increase of aluminum output, the production of aluminum slag is also increasing. Generally, 30-50kg of aluminum ash will be produced for every 1t of primary aluminum produced. According to the calculation of my country's annual production of 35 million tons, the total amount of aluminum ash produced annually is as high as 1.05 billion tons. At present, most production enterprises only recycle primary aluminum ash with high metal aluminum content, and the remaining aluminum slag, secondary alum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/08C09K17/06
CPCC09K17/08C09K17/06
Inventor 石林何柳青
Owner SOUTH CHINA UNIV OF TECH
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