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Planting sand prepared from straws

A straw and solid waste technology, applied in the field of planting sand, can solve the problems of strong dependence on the bonding effect of the binder, poor water and fertilizer retention performance, and short service life of the planting sand, so as to facilitate the fixing of plants and enhance fertilizer retention ability, long service life

Inactive Publication Date: 2019-08-16
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore structure in this application is only formed by the accumulation of sand particles, which makes the water and fertilizer retention performance of the planting sand poor; at the same time, it is highly dependent on the bonding effect of the binder and has a short service life.

Method used

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  • Planting sand prepared from straws
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A planting sand prepared from straw, which is prepared from the following raw materials in parts by weight: 100 parts of fly ash, 5 parts of wheat straw, 5 parts of calcined kaolin, 1 part of quartz powder and 10 parts of water.

[0028] In this example, the planting sand prepared from straw was prepared by the following steps:

[0029] (1) Weigh 100 parts of fly ash, 5 parts of wheat straw, 5 parts of calcined kaolin, and 1 part of quartz powder, and place them in a mixer and mix them evenly to obtain a mixture;

[0030] (2) Pour the mixture and 10 parts of water in the step (1) into a high-speed granulator for granulation, and the rotating speed is 2000r / min;

[0031] (3) Put the granules made in step (2) into a drying oven for drying, and the drying temperature is 70° C.;

[0032] (4) Sinter the pellets dried in step (3) under anaerobic conditions. The sintering process is as follows: heat up to 300°C at 20°C / min, hold for 10 minutes, and then heat up to 700°C at 2°...

Embodiment 2

[0036] A planting sand prepared from straws, which is prepared from the following raw materials in parts by weight: 100 parts of coal gangue, 10 parts of rice straw, 5 parts of bentonite, 2.5 parts of silica fume, and 15 parts of water.

[0037] In this example, the planting sand prepared from straw was prepared by the following steps:

[0038] (1) Weigh 100 parts of coal gangue, 10 parts of rice straw, 5 parts of bentonite, and 2.5 parts of silica fume, place them in a mixer and mix them evenly to obtain a mixture;

[0039] (2) Pour the mixture and 15 parts of water in the step (1) into a high-speed granulator for granulation, and the rotating speed is 1500r / min;

[0040] (3) Put the granules made in step (2) into a drying oven for drying, and the drying temperature is 70° C.;

[0041] (4) Sinter the pellets dried in step (3) under low-oxygen conditions. The sintering process is as follows: heat up to 300°C at 25°C / min, hold for 10 minutes, and then heat up to 700°C at 2°C / m...

Embodiment 3

[0045] A planting sand prepared from straw, which is prepared from the following raw materials in parts by weight: 100 parts of slag, 10 parts of corn stalks, 5 parts of white mud, 5 parts of calcined kaolin, 1 part of quartz powder and 15 parts of water.

[0046] In this example, the planting sand prepared from straw was prepared by the following steps:

[0047] (1) Weigh 100 parts of slag, 10 parts of corn stalks, 5 parts of lime mud, 5 parts of calcined kaolin, and 1 part of quartz powder, and place them in a mixer and mix them evenly to obtain a mixture;

[0048] (2) Pour the mixture and 15 parts of water in the step (1) into a high-speed granulator for granulation, and the rotating speed is 3000r / min;

[0049] (3) Put the granules made in step (2) into a drying oven for drying, and the drying temperature is 80° C.;

[0050] (4) Sinter the pellets dried in step (3) under anaerobic conditions. The sintering process is as follows: heat up to 300°C at 40°C / min, hold for 10 m...

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Abstract

The invention relates to planting sand prepared from straws. The planting sand is prepared from the following raw materials in parts by weight: 100 parts of solid wastes, 5-30 parts of the straws, 5-15 parts of a plasticizer, 1-2.5 parts of a reinforcing agent and 10-20 parts of water. The solid wastes are one or more of fly ash, coal gangue, slag and tailings; and the straws are one or more of rice straws, corn straws, wheat straws and cotton straws. The planting sand is obtained through the processes of raw material weighing, high-speed mixing and granulating, drying, oxygen-free sintering,cooling and finished product preparation. According to the planting sand prepared from the straws, the straws are sintered under the condition of no oxygen or low oxygen to generate biomass carbon, and the biomass carbon is used as a pore-forming agent, so that micropores with uniform sizes are formed in planting sand particles, and a large amount of water can be stored; and meanwhile, functionalgroups such as carboxyl and phenolic hydroxyl on the surface of the biomass carbon enable the biomass carbon to have certain cation exchange capacity, so that the fertilizer retention capacity of theplanting sand is further enhanced, and growth of plants is facilitated.

Description

technical field [0001] The invention relates to the field of planting sand, in particular to planting sand prepared from straws. Background technique [0002] With the increasingly harsh global climate and the rapid population growth, the land has been over-exploited, cultivated and raised, resulting in decreasing arable land. Since the current planting industry mainly relies on the adhesion of the soil and the ability of cohesive water and fertilizer retention, the water and fertilizer applied to the plants are kept and played a role, the reduction of the cultivated land area and the decline of the land quality directly affect the This has led to a decline in food and crop production. Therefore, it is imminent to find a new type of planting substrate. Planting sand is a planting substrate with a porous structure, which has a certain function of water and fertilizer retention. It can be used for planting crops, improving soil, desert control, and mine restoration. The Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/10A01G24/22
Inventor 陈春梅李伟雄胡毅耕贺新明
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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