JPS581158B2 - Dojiyou Kairyouzai - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to improve soil suitable for the healthy growth of crops by blending a small amount of surfactant with slag, which is produced in large quantities in the steel industry, and pulp waste liquid, which is produced as a by-product during pulp manufacturing. The present invention relates to a soil conditioner that has excellent disintegrability and is shaped into a suitable form to be applied to improve the physical environment.

Generally, trace amounts of iron. It is already known that improving soil structure with metals such as nickel and manganese and organic substances has important significance for the healthy growth of many crops.

Therefore, for the purpose of improving soil fertility and soil structure, soil conditioners containing slag as the main ingredient and pulp waste liquid mixed therein can be found on the market, but these soil conditioners generally contain iron, nickel, manganese, It is molded into an appropriate form using slag as the main component, bentonite as a disintegration accelerator, sodium base as a source of organic material for crops, and sulfite pulp waste liquid as an adhesive. There is.

However, these soil conditioners, even without the addition of bentonite as a disintegration accelerator, and even if any kind of pulp waste liquid is used as a binder, are exceptions if the purpose is simply for molding. However, molds made without such a disintegration accelerator have the disadvantage that they take a long time to disintegrate in the presence of water.

In particular, when calcium-based sulfite pulp waste liquid is used as a binder, even if a large amount of bentonite is added as a disintegration promoter, it has little effect on its disintegration properties.

In view of these circumstances, the present inventor aimed to improve the disintegration properties of these soil conditioners. As a result of intensive research, the present invention was completed.

That is, the present invention provides a soil improvement agent manufactured by forming a formulation containing slag as a main ingredient, a sulfite pulp waste liquid containing a lignin sulfonate, and a surfactant into an appropriate form. related to.

The present invention will be explained in detail below.

The slag used in the present invention is mainly composed of nonmetallic substances produced by melting mineral raw materials in the steel industry, etc., and both silicic acid slag and non-silicic acid slag can be used.

When used, it is preferable to use slag containing one or more metal oxides such as phosphate, iron, nickel, and manganese, from the viewpoint of improving soil fertility and healthy crop growth.

The sulfite pulp waste liquid used as a binder in the present invention includes sulfurous acid and hydrogen sulfite (also called bisulfite).

] Refers to the cooking waste liquor produced by cooking wood chips with a cooking liquor consisting of a mixture of ].

The hydrogen sulfite salts used in preparing the cooking liquor include sodium salts, calcium salts, and magnesium salts. Although sulfite pulp waste liquid using any salts such as ammonium salts can be used in the present invention, from the viewpoint of availability in large quantities, it is preferable to use sulfite pulp waste liquid using so-called calcium base using calcium salts. It is industrially advantageous to apply

Further, a fermentation waste liquid obtained by culturing yeast in a sulfite pulp waste liquid and separating yeast bacteria can also be used in the present invention.

On the other hand, the surfactant adopted in the present invention is an anionic surfactant, a cationic surfactant, a nonionic surfactant, if available, since the purpose is to increase the hydrophilicity of the assimilated sulfite pulp waste liquid. Any active agent such as an amphoteric surfactant can be used.

Examples of anionic surfactants include liquid fatty oils, higher alcohols, sulfate salts of olefins, and sulfonates of alkylaryls and alkylnaphthalenes.Cationic surfactants include , for example, alkyl quaternary ammonium salts. Nonionic surfactants include, for example, polyoxyethylene ester type,
These include polyoxyethylene ether type and diethanolamine type surfactants, and examples of amphoteric surfactants include higher alkyl amino acids.

In carrying out the present invention, in order to blend slag, sulfite pulp waste liquid, and surfactant, 30 to 40 parts by weight of sulfite pulp waste liquid with a concentration of 10 to 20% to 100 parts by weight of slag, and 30 to 40 parts by weight of sulfite pulp waste liquid with a surfactant The agent may be blended in a proportion of 0.002 to 0.5 parts by weight.

As a method of blending predetermined amounts of these three components, the slag may be first added to the sulfite pulp waste liquid, and then the surfactant may be added. Alternatively, after adding the surfactant to the sulfite pulp waste liquid, There is no problem in adding slag next.

No matter which blending method is used, there is no discernible difference in the quality of the molded soil conditioner of the present invention.

To carry out the present invention, mine slag and sulfite pulp waste liquid are used. A predetermined amount of the king of surfactants is mixed in a transferable container according to the mixing method shown above. Next, the contents are heated in a temperature range of 100 to 150° C. for about 15 to 30 minutes while rolling, to remove moisture and form into granules, ultimately yielding a product with a moisture content of 5 to 8%.

One of the features of the molded soil conditioner obtained by the present invention is that it is rapidly disintegrated in the presence of water even if any sulfite pulp waste liquid is used.

For example, there is a known soil conditioner 1 (Bi' is a soil conditioner made of mineral slag as a main component, a sodium base, sulfite pulp waste liquid as a binder, and bentonite as a disintegration promoter).
When added to 0 cc of water, disintegration takes more than 15 minutes, but as discovered in the present invention, by adding a predetermined amount of surfactant as a disintegration promoter, disintegration takes just 1 to 2 minutes. The collapse is almost complete.

Similarly, a soil improvement agent that uses mineral slag as its main ingredient, calcium-based sulfite pulp waste liquid as a binder, and bentonite as a disintegration promoter does not cause disintegration at all, but a soil improvement agent containing a surfactant does not cause disintegration at all. The product of the invention quickly disintegrates in just 1 to 2 minutes.

Therefore, the present invention has the feature that any kind of sulfite pulp waste liquid can be used as a binder, further improves the disintegration property of the product, and also serves as an effective use of industrial waste. There are things that cannot be measured.

Hereinafter, comparative examples and examples will be given to specifically explain the present invention.

To determine the disintegration, mix 5g of molded soil conditioner with 100c of water.
The test was conducted after the time required for the sample to disintegrate when placed in c.

Comparative Example 1 Mineral slag fine powder containing Fe and Ni components 100 parts Bentonite fine powder 3 parts Ca-based sulfite pulp waste liquid 40 parts (concentration 25%) The soil conditioner obtained by mixing, molding, and drying with the above compounding ratio is disintegrating. was extremely poor, and almost no disintegration was observed even after 30 minutes or more had passed.

Comparative Example 2 Mineral slag fine powder containing Fe and Ni components 100 parts Na-based sulfite pulp waste liquid 40 parts (concentration 25%) The disintegration properties of the soil conditioner with the above formulation were poor, with almost no disintegration after more than 30 minutes had passed. I was not able to admit.

Example 1 Mineral slag fine powder containing Fe and Ni components 100 parts Ca-based sulfite pulp waste liquid 40 parts (concentration 25%) Nonionic surfactant (polyoxyethylene ether type, manufactured by Miyoshi Oil and Fat, trade name: Pelletex 209A) 0. 04 parts (0.1% added to the pulp waste solution) The soil conditioner obtained by molding with the above mixing ratio was good, with only 5 parts added.
It completely collapsed in 8 seconds.

Example 2 Mineral slag fine powder containing Fe and Ni components 100 parts Ca-based sulfite pulp waste liquid 40 parts (concentration 25%) Nonionic surfactant (polyoxyethylene ether type, manufactured by Miyoshi Oil and Fat, trade name: Pelletex 209A) 0. 0.004 parts (0.01% added to the pulp waste solution) The soil conditioner obtained by molding with the above mixing ratio showed good disintegration properties and completely disintegrated in just 90 seconds.

Example 3 Fine slag powder containing Fe and Ni components 100 parts Ca-based sulfite pulp waste liquid 40 parts (concentration 25%) Anionic surfactant (mixture of alkylbenzene sulfonate type and higher alcohol sulfate type, Kao) Made of soap, product name: Wonderful K) 0.1 part (added 0.25% to pulp waste solution) The soil conditioner obtained by molding with the above mixing ratio shows good disintegration and is completely disintegrated in 150 seconds. It collapsed.

Example 4 Mineral slag fine powder containing Mn component 100 parts Ca-based sulfite pulp waste liquid 40 parts (concentration 25%) Nonionic surfactant (polyoxyethylene ether type, manufactured by Miyoshi Oils and Fats, trade name: Pelletex 209A) 0.004 partsゝ(
The soil conditioner obtained by mixing, molding and drying at the above mixing ratio (0.01% added to the pulp waste solution) showed good disintegration properties and disintegrated in just 95 seconds.

Example 5 Mineral slag fine powder containing Mn component 100 parts Ca-based sulfite pulp waste liquid 40 parts (concentration 25%) Nonionic surfactant (polyoxyethylene ether type, NOF NS211) 0.006 parts (
(0.015% addition to pulp waste liquid) The soil conditioner obtained by mixing, molding and drying at the above mixing ratio showed good disintegration properties and disintegrated in 156 seconds.

Claims (1)

[Claims] 1 The main component is slag containing iron, nickel, or manganese, which is a by-product of the steel industry, etc., and 100% of slag is added to this.
3 to 10 parts of solid content of sulfite pulp waste liquid containing lignin sulfonate and 0.002 to 0 of surfactant.
．． A soil conditioner made by molding a mixture consisting of one part.