CN118160602A - A blast furnace slag-rolling sludge-based composite seedling medium and preparation method thereof - Google Patents

Abstract

The present invention provides a blast furnace slag-rolling sludge-based composite seedling matrix and a preparation method thereof, and belongs to the field of agricultural matrix. The composite seedling matrix includes blast furnace slag, rolling sludge, peat-mushroom slag, and perlite-vermiculite. The _FeO / _Fe2O3 content in the rolling sludge is 35% to 40%. The particle size of the blast furnace slag, the particle size of the perlite and the particle size of the vermiculite are not equal. The present invention solves the problems of high-value comprehensive utilization of blast furnace slag and rolling sludge, low content of Fe elements in blast furnace slag (different from steel slag), and difficult excitation of soluble Ca, Si, Al, Mg, and Fe elements in blast furnace slag and rolling sludge. The present invention uses a blast furnace slag-rolling sludge-based composite seedling matrix for hydrangea seedling cultivation, which can open up new areas of utilization of blast furnace slag and rolling sludge, as well as added value, and meets the current energy-saving, environmental protection, and circular economy industrial development requirements.

Description

A blast furnace slag-rolling sludge-based composite seedling medium and preparation method thereof

Technical Field

The invention belongs to the field of agricultural substrates, and specifically relates to a blast furnace slag-steel rolling sludge-based composite seedling cultivation substrate and a preparation method thereof, which are used for hydrangea seedling cultivation.

Background technique

Blast furnace slag is a byproduct of the ironmaking process in the steel production process, containing a large amount of iron, silicon, calcium and other elements. Steel rolling sludge is a type of sludge produced by steel companies during the steel rolling process, which has a high iron content. At present, blast furnace slag and steel rolling sludge are generally stored in large quantities in the open air, which not only occupies valuable land, but also pollutes the surrounding environment and groundwater. Therefore, how to utilize blast furnace slag and steel rolling sludge on a large scale and efficiently, especially using its nutrients, to reduce environmental burdens and increase corporate efficiency, is an urgent problem that needs to be solved.

Therefore, using blast furnace slag and steel rolling sludge to prepare a blast furnace slag-steel rolling sludge-based composite seedling matrix for hydrangea seedling cultivation can open up new areas for the utilization of blast furnace slag and steel rolling sludge, as well as added value, which is in line with the current industrial development requirements of energy conservation, environmental protection and circular economy.

Summary of the invention

In order to solve the problems of high-value comprehensive utilization of blast furnace slag and steel rolling sludge, the Fe content in blast furnace slag (different from steel slag) is low, and the soluble Ca, Si, Al, Mg, and Fe elements in blast furnace slag and steel rolling sludge are not easy to be excited. The present invention uses a blast furnace slag-steel rolling sludge-based composite seedling medium for hydrangea seedling cultivation, in order to solve the above problems.

In order to solve the above technical problems, the present invention is implemented through the following technical solutions.

The present invention provides a blast furnace slag-rolling sludge-based composite seedling matrix, and the raw materials of the composite seedling matrix are as follows in terms of volume percentage:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is 38.46%, _SiO2 is 33.23%, _Al2O3 is _18.24 %, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%; the particle size of the blast furnace slag is 4.5mm- _6.0mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 35% to 40%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 3:1 to 1:3.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 2:1 to 1:2.

The particle size of the perlite in the perlite-vermiculite is 3.0 mm to 4.5 mm.

The vermiculite particle size in the perlite-vermiculite is 3.0 mm to 4.5 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The present invention also provides a method for preparing the above-mentioned blast furnace slag-steel rolling sludge-based composite seedling medium, which specifically comprises the following steps:

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

The innovation of the present invention:

(1) Blast furnace slag is different from steel slag. It has high air permeability and is not easy to harden. It also contains useful elements required by plants such as Ca, Si, Al, and Mg. It is more suitable for large-scale use as a seedling medium than steel slag. At the same time, steel mill sludge contains useful elements required by plants such as Fe.

(2) Perlite-vermiculite has good water retention and air permeability, which can retain moisture and continuously provide moisture for hydrangea seedling cultivation.

(3) The synergistic fermentation of peat and shiitake mushroom residue in an aquatic environment can not only release nutrients themselves, but also stimulate the release of soluble Ca, Si, Al, Mg, and Fe elements in blast furnace slag and steel rolling sludge, forming a composite Si fertilizer, improving the plant's disease resistance, photosynthetic performance, respiratory performance, etc., thereby promoting plant production.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention solves the problems of high-value comprehensive utilization of blast furnace slag and steel rolling sludge, low Fe content in blast furnace slag (different from steel slag), and difficulty in activating soluble Ca, Si, Al, Mg and Fe elements in blast furnace slag and steel rolling sludge.

2. The present invention utilizes blast furnace slag-rolling sludge-based composite seedling medium for hydrangea seedling cultivation, which can open up new areas of utilization of blast furnace slag and steel rolling sludge, as well as added value, and meets the current industrial development requirements of energy conservation, environmental protection, and circular economy.

Detailed ways

The present invention is described in detail below in conjunction with specific embodiments, but the present invention is not limited to the following embodiments.

Example 1

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 4.5 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 40%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 1:1.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 2:1.

The particle size of the perlite in the perlite-vermiculite is 4.2 mm.

The vermiculite particle size in the perlite-vermiculite is 3.0 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Example 2

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 6.0 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 37%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 1:3.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:1.

The particle size of the perlite in the perlite-vermiculite is 4.5 mm.

The vermiculite particle size in the perlite-vermiculite is 3.6 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Example 3

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 5.4 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 35%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 3:1.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:2.

The particle size of the perlite in the perlite-vermiculite is 3.0 mm.

The vermiculite particle size in the perlite-vermiculite is 3.9 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Example 4

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 5.7 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 38%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 1:2.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:2.

The particle size of the perlite in the perlite-vermiculite is 3.3 mm.

The vermiculite particle size in the perlite-vermiculite is 4.5 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Example 5

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 4.8 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 39%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 2:1.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 2:1.

The particle size of the perlite in the perlite-vermiculite is 3.9 mm.

The vermiculite particle size in the perlite-vermiculite is 3.3 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Example 6

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 5.1 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 36%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 1:1.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:1.

The particle size of the perlite in the perlite-vermiculite is 3.6 mm.

The vermiculite particle size in the perlite-vermiculite is 4.2 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Comparative Example 1

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 5.1 _mm .

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 1:1.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:1.

The particle size of the perlite in the perlite-vermiculite is 3.6 mm.

The vermiculite particle size in the perlite-vermiculite is 4.2 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-rolling sludge-based composite seedling medium.

Comparative Example 2

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 5.1 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 36%.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:1.

The particle size of the perlite in the perlite-vermiculite is 3.6 mm.

The vermiculite particle size in the perlite-vermiculite is 4.2 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Comparative Example 3

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is _38.46 %, _SiO2 is 33.23%, _Al2O3 is 18.24%, MgO is 6.06%, _SO3 is 1.46%, _TiO2 is 0.73%, MnO is 0.48%, _Fe2O3 is 0.47%, _Na2O is 0.38%, _K2O is 0.24%, and others are 0.25%. The particle size of the blast furnace slag is 5.1 _mm .

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 36%.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:1.

The particle size of the perlite in the perlite-vermiculite is 3.6 mm.

The vermiculite particle size in the perlite-vermiculite is 4.2 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

Comparative Example 4

Taking the preparation of 100 g of the blast furnace slag-rolling sludge-based composite seedling matrix of the present invention as an example, the components and their volume ratios are as follows:

The chemical compositions of the blast furnace slag are as follows by mass percentage: CaO is 42.11%, _SiO2 is 17.64% _{, Al2O3} is 10.53%, MgO is 6.45%, _Fe2O3 is _13.89 %, and others are 9.38%. The slag particle size is 5.1 mm.

The FeO/Fe ₂ O ₃ content in the steel rolling sludge is 36%.

The mass ratio of peat to shiitake mushroom residue in the peat-shiitake mushroom residue is 1:1.

The mass ratio of perlite to vermiculite in the perlite-vermiculite is 1:1.

The particle size of the perlite in the perlite-vermiculite is 3.6 mm.

The vermiculite particle size in the perlite-vermiculite is 4.2 mm.

The blast furnace slag particle size is ≠ the perlite particle size, the blast furnace slag particle size is ≠ the vermiculite particle size, and the perlite particle size is ≠ the vermiculite particle size.

The blast furnace slag, steel rolling sludge, peat, mushroom residue, perlite and vermiculite are mixed to obtain a blast furnace slag-steel rolling sludge-based composite seedling medium.

The performance test results of the blast furnace slag-rolling sludge-based composite seedling substrates prepared in Examples 1 to 6 and Comparative Examples 1 to 4 are as follows:

Table 1. Effects of blast furnace slag-rolling sludge-based composite seedling medium on the number of surviving hydrangea seedlings and root activity

Claims (10)

1. The blast furnace water slag-steel rolling sludge-based composite seedling substrate is characterized by comprising the following raw materials in percentage by volume:

2. The blast furnace water slag-steel rolling sludge-based composite seedling substrate as claimed in claim 1, wherein the blast furnace water slag comprises the following chemical components in percentage by mass: 38.46% CaO, 33.23% SiO ₂, 18.24% Al ₂O₃, 6.06% MgO, 1.46% SO ₃, 0.73% TiO ₂, 0.48% MnO, 0.47% Fe ₂O₃, 0.38% Na ₂ O, 0.24% K ₂ O, and 0.25% others.

3. The blast furnace grain slag-steel rolling sludge-based composite seedling substrate according to claim 2, wherein the grain size of the blast furnace grain slag is 4.5 mm-6.0 mm.

4. The blast furnace water slag-steel rolling sludge-based composite seedling substrate according to claim 1, wherein the content of FeO/Fe ₂O₃ in the steel rolling sludge is 35-40%.

5. The blast furnace water slag-steel rolling sludge-based composite seedling substrate according to claim 1, wherein the mass ratio of turf to lentinus edodes slag in the turf-lentinus edodes slag is 3:1-1:3.

6. The blast furnace slag-rolled steel sludge-based composite seedling substrate according to claim 1, wherein the mass ratio of perlite to vermiculite in the perlite-vermiculite is 2:1-1:2.

7. The blast furnace slag-rolled steel sludge-based composite seedling substrate according to claim 1, wherein the grain size of perlite in the perlite-vermiculite is 3.0 mm-4.5 mm.

8. The blast furnace slag-rolled steel sludge-based composite seedling substrate according to claim 1, wherein the grain size of vermiculite in perlite-vermiculite is 3.0-4.5 mm.

9. The blast furnace slag-rolled steel sludge-based composite seedling substrate according to claim 1, wherein the blast furnace slag particle size is not equal to perlite particle size, blast furnace slag particle size is not equal to vermiculite particle size, and perlite particle size is not equal to vermiculite particle size.

10. A method for preparing the blast furnace grain slag-steel rolling sludge-based composite seedling substrate according to claim 1, which is characterized by comprising the following steps:

Mixing the blast furnace water slag, the steel rolling sludge, the turf, the lentinus edodes fungus slag, the perlite and the vermiculite to obtain the blast furnace water slag-steel rolling sludge-based composite seedling substrate.