JPS62162662A - Caking agent containing coal ash as major component - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a binder whose main component is coal ash discharged from coal-fired power plants and the like.

(Prior art) Pulp waste liquid (rigsulfonic acid), bentonite, water glass, tar, pitch, etc. are used as binders for domestic charcoal, briquettes, etc. Bentonite is also used as a sand molding material for foundries. 〇 (problem that Kaimei is trying to solve) The above-mentioned conventional binders have the following shortcomings:

With the exception of bentonite, many of these binders are relatively expensive, and the binder accounts for a relatively large portion of the product cost.On the other hand, coal ash
The amount of coal ash emitted from coal-fired power plants, etc. is currently approximately 2.
1,000,000,000 tons, and it is said that it will continue to increase every year and reach a huge amount of approximately 7,500,000 tons by 1986.

Coal ash, which is emitted in large quantities, is used in some parts as a cement mixing agent and raw material, but it only accounts for about 0.40% of the total amount emitted, and 60% of it is from industrial waste. Is the fruit being disposed of in landfills a major social problem due to its impact on the environment and the problem of preserving land for landfill? I'm holding it.

(Means to solve the problem) Components of coal ash 1st ti! The trace shown in is similar to the composition of bentonite.

However, although coal ash itself has some caking properties, it is still used as a caking agent. By mixing these, a powdered binder with better caking properties than existing binders was obtained due to a synergistic effect.

Table 1: In the binder, it is possible to find a method that can exhibit strong caking properties and reduce the cost of the binder relative to the product cost, depending on the target audience. Various binders have been developed depending on each case, but 8
With the aim of utilizing the physical properties of coal ash, which has components similar to bentonite (bentonite) IC, as described in Section 11, by adding commercially available ash binders (lignin sulfonic acid, bentonite, etc.) to the coal ash,
This is a caking agent developed that has strong caking properties.

(Example) Embodiments of the F1 invention will now be described.

(A1 coal ash 95%, lignin sulfonic acid (lr powder)
% (hereinafter referred to as Quiz-1 binder) Fu0 ■ Tine-1 binder 3 is added to powder obtained by drying and crushing sewage sludge.
~5% was mixed, kneaded with water, dried, and solidified in one step, resulting in a stationary fuel with an enthusiasm of more than 3000&j/Kp.

@ If-type fuel with a calorific value of about 40,001 J/m or more was obtained with 65% dried and crushed sewage sludge, 32% pulverized coal, and 3% Taai 2-1 binder.

Table 2 shows the comparison results between type-1m binder and bentonite in sand molding for foundries.

Table 2 In addition, almost the same results as in Table 2 were confirmed when the added binder, lignin sulfonic acid, was directly replaced with 5% bentonite in Type-1 binder. O +B+ Coal ash 80%, lignin Sulfone #20%
(hereinafter referred to as Type-2 binder)■
As a solidification binder for fuel charcoal, about 8 to 12% of 1f [f! It is used.

When solidifying dry products of pulverized coal (approximately 100 mex), a comparison of lignin sulfonic acid and Type-2 binder shows that both of them are 8 to 10% (!! It was found that it solidified in the same way and produced high-heat generating fuel.

(W) Cement admixture, caking aid, and asbestos binder 1 Also in development as an effective auxiliary agent as a spreading agent for agricultural chemicals 0 tel Coal ash 70%, lignin sulfone I11!3
0% (hereinafter referred to as Type-3 binder) As a binder for fuel charcoal, it exhibits even stronger caking than Type-3 binder. case, 5-7%
By using it, it becomes possible to carbonize solid beans.

In addition to the above, by making use of the characteristics of coal ash and combining it with other binders, we can expect it to be used in a wider range of applications.

(Effects of the Invention) Coal ash, which is the main component of the binder according to the present invention, has a large impact on the environment due to the large amount of waste that it throws away during disposal, and there is a problem in securing land for landfill disposal. It is showing a tendency to become a social problem.

Under these circumstances, effective utilization of coal ash will be a solution or mitigation measure for various problems associated with flea disposal, and will also add value to coal ash, so the effect will be It is possible that it will be immeasurable.

Even when viewed as a binding agent, it can be said that it is inexpensive and can be positioned as an effective cultivation material.

Procedural amendment (voluntary) December 1, 1985 1, Indication of the case 1988 Patent Application No. 006016 2, Name of the invention Binder mainly composed of coal ash 3, Amendment to the person's case Related Patent Applicant Address Kitakyushu City 1-11-35 Tomoda, Hatanishi-ku Name Hiroaki Gen Co., Ltd. "Claims" in the letter 5. Contents of amendment 1. The scope of claims in the specification is as follows: to correct.

Claims (1)

[Claims] A caking agent whose main component is coal ash, which is characterized by having strong caking properties by mixing a small amount of existing caking agents into it.