Soil water-retaining agent produced from aluminum ash and preparation method thereof

A technology of soil water retaining agent and aluminum ash, 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 and insufficient technical level, achieve high-efficiency comprehensive utilization level, improve economic benefits, improve and repair effect obvious effect

Active Publication Date: 2020-04-17
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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  • Soil water-retaining agent produced from aluminum ash and preparation method thereof
  • Soil water-retaining agent produced from aluminum ash and preparation method thereof
  • Soil water-retaining agent produced from aluminum ash and preparation method thereof

Examples

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Effect test

Embodiment 1

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

[0045] (1) The aluminum ash after the aluminum extraction is mixed with the nitric acid solution with a concentration of 0.1mol / L, the mass volume ratio of the aluminum ash after the aluminum extraction and the nitric acid solution is 1:1g / mL, and the stirring process (rotating speed is 50rpm, time is 10min), then ultrasonic treatment (ultrasonic time is 30min), shaker shakes and disperses evenly (rotating speed is 100r / min, time is 10min), stands still (standstill time is 1h), vacuum suction filtration for the first time, obtains The first filtrate and the first filter residue;

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

Embodiment 2

[0052] A kind of preparation method of the soil water-retaining agent that utilizes aluminum ash to produce, comprises the steps:

[0053] (1) the aluminum ash after the aluminum extraction is mixed with a concentration of 0.3mol / L nitric acid solution, the mass volume ratio of the aluminum ash after the aluminum extraction and the nitric acid solution is 1:5g / mL, and the stirring process (rotating speed is 100rpm, Time is 30min), then ultrasonic treatment (ultrasonic time is 30min), shaker shakes and disperses evenly (rotating speed is 150r / min, time is 10min), stands still (standstill time is 5h), vacuum suction filtration for the first time, obtains The first filtrate and the first filter residue;

[0054] (2) adding 100mL concentration to the filtrate for the first time described in step (1) is the sodium sulfide solution of 1.0mol / L, the volume ratio of the filtrate and sodium sulfide solution for the first time is 1:2, mix uniformly to obtain Mixed solution, leave stand...

Embodiment 3

[0060] A kind of preparation method of the soil water-retaining agent that utilizes aluminum ash to produce, comprises the steps:

[0061] (1) the aluminum ash after the aluminum extraction is mixed with the nitric acid solution with a concentration of 0.5mol / L, the mass volume ratio of the aluminum ash after the aluminum extraction and the nitric acid solution is 1:10g / mL, and the stirring process (rotating speed is 100rpm, time is 20min), then ultrasonic treatment (ultrasonic time is 30min), shaker shakes and disperses evenly (rotating speed is 100r / min, time is 30min), stands still (standstill time is 5h), vacuum suction filtration for the first time, obtains The first filtrate and the first filter residue;

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

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Abstract

The invention discloses a soil water-retaining agent produced from aluminum ash and a preparation method thereof. The method comprises the following steps: respectively adding dilute nitric acid and asodium sulfide solution into the aluminum ash to remove heavy metals in the aluminum ash until the content reaches an agricultural heavy metal limit standard; mixing the aluminum ash without the heavy metals with a calcium-based compound, and grinding; activating the fully mixed materials at a high temperature to obtain a material taking calcium sulphoaluminate as a main mineral component; and finally, under the hydration condition, obtaining the soil water-retaining agent which takes ettringite with 32 crystal water as a main mineral component and has a weak base characteristic. The productcan be applied to drought resistance and improvement repair work of soil in arid and semi-arid regions. According to the method, efficient agricultural comprehensive utilization of the aluminum ash which is an aluminum extraction secondary byproduct is realized, and a scientific method is provided for reducing aluminum ash stockpiling and fully utilizing aluminum resources; the prepared ettringitewater-retaining agent has a certain soil water-retaining capacity and a good long-term water-retaining effect, 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 using aluminum ash and a preparation method thereof. Background technique [0002] Aluminum ash 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 in aluminum output, the production of aluminum ash is also increasing. Generally, 30-50kg of aluminum ash slag will be produced for every 1 ton 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 every year is as high as 1.05 billion tons. At present, most production enterprises only recycle primary aluminum ash with high metal aluminum content, while the remaining aluminum slag and second...

Claims

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Application Information

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Patent Type & Authority Applications(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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