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Method for preparing organic mineral fertilizer from oil shale semicoke

A technology of oil shale semi-coke and organic mineral fertilizers, which is applied in the field of waste resource reuse, can solve the problems that plants cannot be fully and effectively utilized, and do not have activity, etc., and achieve the goal of realizing resource utilization, improving nutritional levels, and improving crop quality Effect

Active Publication Date: 2020-05-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are already patents on the application of mineral semi-coke to soil improvement. For example, CN 105542790 A discloses a soil conditioner prepared by heating oil shale semi-coke at about 500-600°C, which can condition and repair different acidic soils. This invention makes full use of the porous structure formed after heat treatment of oil shale semi-coke, but the macromolecular organic components and associated minerals in semi-coke are not active and cannot be fully and effectively utilized by plants

Method used

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  • Method for preparing organic mineral fertilizer from oil shale semicoke
  • Method for preparing organic mineral fertilizer from oil shale semicoke
  • Method for preparing organic mineral fertilizer from oil shale semicoke

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The oil shale semi-coke is crushed to 80 mesh, added to the phosphoric acid solution with a mass concentration of 8% for 3 hours, and then dehydrated to 40% with a plate and frame filter press, and then sent to the rotary kiln with twin screws. Calcined at 300°C for 3 hours under a nitrogen atmosphere, then treated with 5% potassium hydroxide solution for 1 hour, and then added the composite bacteria solution (wherein, the composite bacteria consisted of Bacillus subtilis, Bacillus licheniformis, yeast and Pseudomonas composite bacteria by 1 : 1:1:1 mass ratio composite, the composite bacteria solution is prepared by mixing water and composite bacteria at a weight ratio of 130:1; the mass ratio of oil shale semi-coke to composite bacteria solution is 8:1) and mix evenly, Cultivate at 30° C. for 12 hours, dry and granulate to obtain an organic mineral fertilizer product. The XRF composition analysis of organic and mineral fertilizers is shown in Table 1. The product con...

Embodiment 2

[0023] The oil shale semi-coke is crushed to 80 mesh, added to a sulfuric acid solution with a mass concentration of 6% for activation treatment for 2 hours, and then dehydrated to 40% with a plate and frame filter press, and then sent into a rotary kiln with twin screws. Calcined at 350°C for 3 hours under a nitrogen atmosphere, then treated with 3% sodium hydroxide solution for 1 hour, and then added the composite bacteria solution (wherein, the composite bacteria consisted of Bacillus subtilis, Bacillus licheniformis, nitrifying bacteria and Pseudomonas composite bacteria according to 1:1:1 mass ratio composite, the composite bacteria solution is prepared by mixing water and composite bacteria at a weight ratio of 120:1; the mass ratio of oil shale semi-coke to composite bacteria solution is 8:1) and mix evenly, in Cultivate at 28°C for 14 hours, dry and granulate to obtain an organic mineral fertilizer product. The resulting product contains 23.64% organic matter, SiO 2 5...

Embodiment 3

[0025] Oil shale semi-coke was crushed to 80 mesh, added to a phosphoric acid solution with a mass concentration of 6% for activation treatment for 3 hours, dehydrated to 40% by pressure filtration with a plate and frame filter press, and then sent into a rotary kiln with twin-screws. Calcined at 450°C for 1.5h in the atmosphere, then treated with 3% potassium hydroxide solution for 2h, and then added the complex bacteria solution (wherein, the complex bacteria were composed of Bacillus licheniformis, nitrifying bacteria and pseudomonas complex bacteria in a ratio of 1:1:1 The mass ratio compound, the composite bacteria solution is prepared by mixing water and the composite bacteria at a weight ratio of 150:1; the mass ratio of oil shale semi-coke to the composite bacteria solution is 6:1), mix evenly, and cultivate at 35°C for 16 hours, Dried and granulated to obtain organic mineral fertilizer products. The XRF composition analysis of organic and mineral fertilizers is shown ...

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Abstract

The invention discloses a method for preparing an organic mineral fertilizer from oil shale semicoke. The method comprises the following steps: crushing the oil shale semicoke to below 80 meshes, carrying out acid activation treatment and filter pressing dehydration, feeding the oil shale semicoke into a rotary kiln by using double screws, calcining the oil shale semicoke in a nitrogen atmosphere,carrying out alkali treatment, mixing the obtained substance with compound bacteria, culturing the mixture at 28-35 DEG C for 6-24 hours, and drying and granulating the mixture to obtain the product.According to the method, plant-absorbable calcium, potassium, magnesium and zinc plasma states can be formed through acid treatment of the semicoke, and micromolecular organic matters are converted into biochar through calcination treatment, so that microporous and mesoporous structures in the semicoke are activated, meanwhile, humic acid-containing organic matters are effectively reserved, and the content of soil humus is increased; silicon in the mineral can be activated through alkali treatment; and the added compound strains are easily absorbed by crops, so that the crop quality is improved. According to the method, recycling of the oil shale semicoke waste residues is achieved, the nutrient level of soil can be improved, and good ecological benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to a method for preparing an organic mineral fertilizer, in particular to a method for preparing an organic mineral fertilizer by using oil shale semi-coke, and belongs to the field of reuse of waste resources. [0002] technical background [0003] For a long time, my country's agricultural production has been one-sidedly pursuing high yields and relying too much on chemical fertilizers and pesticides, resulting in an increasing shortage of effective mineral nutrients in cultivated land, aggravated soil pollution, and a serious decline in the output and quality of agricultural products. Security is a threat. At present, there are more and more patents on organic fertilizers, carbon-based fertilizers, microbial fertilizers and mineral fertilizers, such as: organic-inorganic mixed fertilizer and its preparation method (CN 96120245.9), a slow-release organic fertilizer for wheat and its preparation method (CN 107061336), an organic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/80
CPCC05G3/00C05F11/08
Inventor 宗莉王爱勤牟斌康玉茹许江朱永峰汪琴
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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