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Method for producing soil conditioner by using waste biomass and carbide slag as raw materials

A soil conditioner and biomass raw material technology, which is applied in the fields of agriculture and environmental protection, can solve the problems of ineffective utilization of straw, high cost of zeolite powder, damage to soil strength, etc., so as to increase the added value of products, reduce the cost of raw materials, and reduce the environmental impact. the effect of

Pending Publication Date: 2019-05-24
HEBEI NORMAL UNIV FOR NATTIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

About 800 million tons of straw are produced in the country every year, but the comprehensive utilization rate is less than 80%. There are still a large amount of straw that cannot be effectively used, resulting in serious discarding and direct burning in the open air, resulting in waste of resources, soil damage and environmental pollution.
However, the cost of required zeolite powder, humic acid, attapulgite, trace elements and compound amino acids is relatively high

Method used

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  • Method for producing soil conditioner by using waste biomass and carbide slag as raw materials
  • Method for producing soil conditioner by using waste biomass and carbide slag as raw materials
  • Method for producing soil conditioner by using waste biomass and carbide slag as raw materials

Examples

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Effect test

Embodiment 1

[0027] Rice straw is used as the biomass raw material, the raw material has a water content of 16.3%, and its main components are shown in Table 1. It is cut into small pieces with a length of 2-5 cm, and put into a pyrolysis furnace for pyrolysis. The heating rate is 20°C / min. The pyrolysis temperature is 500° C., and the pyrolysis time is 40 minutes. The generated biochar is pulverized and sieved (100 mesh) to make biochar powder. Calcium carbide slag is dehydrated and dried to obtain a powder product, and after calcining (at a temperature of 1200°C for 40 minutes), the burned residue is obtained. The main components are shown in Table 2. Put the biochar powder into the mixing tank for mixing to obtain a mixed powder (addition ratio is 60% of biochar powder, 10% of monoammonium phosphate, and 30% of calcium carbide slag powder), and then put it into the drum granulator to dissolve the urea in water, and spray hot steam into the drum granulator for granulation, and the obtain...

Embodiment 2

[0033] Take bamboo as biomass raw material, its raw material water content is 31.0%, main composition is shown in Table 3, pulverizes into the particle of length 5-20cm, width 1-4cm, carries out pyrolysis through pyrolysis furnace, and heating rate is 20 °C / min, the pyrolysis temperature is 600 °C, and the pyrolysis time is 60 min. The generated biochar is pulverized and sieved (100 mesh) to make biochar powder. Calcium carbide slag was dehydrated and dried to obtain a powder product, and after calcining (at a temperature of 1100°C for 40 minutes) to obtain a burnt residue, the main components of which were shown in Table 4. After cooling, crushing, and sieving, it was mixed with monoammonium phosphate and The biochar powder is put into the mixing tank for mixing to obtain a mixed powder (the addition ratio is 50% of biochar powder, 5% of monoammonium phosphate, and 45% of calcium carbide slag powder), and then put into the drum granulator to dissolve the urea in water, and sp...

Embodiment 3

[0039]Take the farmland soil and let it air-dry naturally, remove impurities, grind, and pass through a 6mm sieve. Different amounts (0%, 0.5%, 1%) of soil conditioner (using rice straw and calcium carbide slag as raw materials), set up 3 treatments, each treatment repeated 6 pots, and sowed 4 seeds in each pot, at the four-leaf stage Time seedlings, weed out weak seedlings, keep one seedling with strong and consistent growth, normal management during the growth period, including timely weeding, irrigation, spraying pesticides to prevent and control diseases and insect pests, etc. After the sorghum matures, the phenotypic traits of the plants are measured. Table 6. The results showed that the growth of sorghum treated with soil conditioner was better, and the sorghum biomass, plant height and other indicators increased with the increase of the application amount within the treatment range.

[0040] Table 5 Basic physical and chemical properties of soil

[0041]

[0042] T...

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Abstract

The invention relates to a method for producing a soil conditioner by using waste biomass and carbide slag as raw materials. The method comprises the following steps: crushing and sieving biochar generated by pyrolysis of biomass raw materials such as rice straws, mixing the biochar with residue obtained by calcining carbide slag and monoammonium phosphate, and preparing soil conditioner particlesin a urea spraying and granulation mode. According to the method, resource utilization and harmless utilization of waste biomass and carbide slag are realized, the produced product has remarkable improvement benefits on degraded soil such as soil acidification and saline-alkali soil, and nitrogen is provided for plant growth. The method has the advantages of simplicity in operation, adjustable formula, feasibility, high resource utilization rate, no secondary pollution problem and remarkable economic benefit.

Description

technical field [0001] The invention relates to the fields of agriculture and environmental protection, in particular to a method for producing a soil conditioner by using waste biomass and calcium carbide slag as raw materials, so as to realize the reduction, recycling and harmless utilization of waste resources. Background technique [0002] Soil is the material basis for human survival. However, due to the long-term irrational use of chemical fertilizers and pesticides and the discharge of industrial wastes, the cultivated land in my country has been severely degraded, and it is becoming more and more serious. The main manifestations are soil acidification and compaction, nutrient imbalance, and secondary salinization. , continuous cropping obstacles, heavy metal pollution, etc., have seriously affected the sustainable development of my country's agriculture, and had a serious impact on food security. With the rapid development of economy and society and people's increasin...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09B3/00C09K101/00
Inventor 薛忠财柳洁王晓远
Owner HEBEI NORMAL UNIV FOR NATTIES