JPS61281188A - Snow melting material for preventing scattering - Google Patents

Abstract

PURPOSE:A snow melting material for preventing scattering, which will neither scatter nor disappear uselessly during application, and not settle in snow, obtained by blending raw material powder with black pigment and a binder solution granulating the blend to give a specific particle size constitution. CONSTITUTION:Raw material powder such as calcium carbonate, etc. is blended with black pigment such as carbon black, etc. and a binder solution such as pulp waste liquor, etc., and granulated to give the aimed snow melting material for preventing scattering, having a particle size distribution comprising 60-80wt% particles with 0.35-1.2mm particle diameter. Black rouge, fly ash, etc., may be cited as the black pigment besides same and waste molasses or alcohol waste liquor may be cited as the binder solution.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a snow-melting material that is used in snowy areas to spread on snow-covered surfaces to promote snow melting. This invention relates to an anti-scattering snow melting material that prevents snow melting and settling during snowfall.

[Conventional technology and problems]

Conventionally, powdered and granular snow melting materials are known. The former, that is, powder, includes fly ash, calcium carbonate with carbon black, etc.
Most of this powdered snow melting material has particles with a diameter of less than 0.100, and even the slightest breeze will scatter the snow melting material when it is spread, making it difficult to spread it accurately onto the snow-covered surface you are trying to melt, or to prevent it from touching your clothes or skin. Furthermore, carbon black, which has a low specific gravity, is blown away by the wind even after being spread, making it impossible to effectively collect sunlight on the snow surface.

In this respect, for example, a so-called granular snow melting material, which is made by mixing carbon black with calcium carbonate and granulating it using an appropriate binder liquid, can solve the above-mentioned drawbacks of powdered snow melting materials. However, as long as this granular snow melting material is granulated by transferring the raw material powder to it using a transfer type granulator while spraying a binder liquid, the particle size of this granular snow melting material is usually 1 to 4 grains. Since most of them are relatively large, they tend to settle during the snowfall and are not able to effectively collect sunlight when they are on the snow surface.
Even if the amount of snow melting material is the same, the total surface area is smaller than that of powdered snow melting material, and the light collection rate is therefore lower. There was a problem in that it required spraying.

Therefore, the anti-scattering snow melting material of the present invention is intended to solve the above-mentioned problems of powdery or granular snow melting materials.

[Means for solving problems]

The present invention reduces the proportion of particles with a particle size of 0.15 nm or less, which are easy to scatter, and particles with a particle size of 1 to 4 fl, which tend to settle. 80%
This is an anti-scattering snow melting material characterized by having a structure where

[Effect]

The anti-scattering snow-melting material of the present invention can be manufactured easily and reliably through the development of a unique manufacturing method described below. Located on the top of the snow, it effectively collects sunlight and performs the snow melting function.

[Example] Calcium carbonate as a raw material powder was pulverized in a pulverizer 1 so that 70% of the powder had a particle size of 0.15 Tsurumimizo, and 3.500 kg/h of the calcium carbonate was sent to a mixer 2. To this, 35 kg of carbon black was added as a black pigment.
h, and 21.0 kg of pulp waste liquid as binder liquid.
/h and knead them well.

By this kneading, the calcium carbonate and carbon blank are mixed uniformly, and it is presumed that the calcium carbonate particles adhere a small amount of carbon blank in a thin film form to each surface of the calcium carbonate particles due to the pulp waste liquid.

The kneaded material is then sent to the crusher 3. This crusher 3 crushes the crosstalk nodules generated during the above-mentioned crosstalk.

This completed the pre-granulation stage treatment, and then it was fed to the transfer type granulator 4, and at the same time, +r/h was added by spraying to the pulp waste liquid 105 as a binder liquid and granulated. At this time, the rotational speed of the granulator 4 was set to 14 RPM, and the inclination angle was set to 55°. After granulating with the granulator 4, it is placed in a rotary dryer 5 and dried to a moisture content of about 0.2 to 1.0%. In addition to the drying function, this dryer 5 breaks down the lump-like portions where particles adhere to each other and sorts the particles.

The particle size of the finished product was as follows.

Less than 0.35m 62.3kg (8,
2%) Oo35 dragon or more less than 1.2mm 502.8k
g (65.8%) 1°2 days or more 198
．． 6kg (26.0%) The snow melting effect of the above product of the present invention was compared with that of conventional powder and granular snow melting materials, and the results were as follows.

(Snow surface fall amount (co+)) (Snow surface fall amount (cn)) Even if the product is manufactured using the same manufacturing method as above, the particle size is 0.
For samples in which 60% of the particles had a particle size of less than 35 mm, and in samples in which 55% had a particle size of 1.2 nm or more,
Only the same degree of fall was observed as in the conventional powder snow melting material and granular snow melting material, respectively.

In addition to the pulp waste liquid, blackstrap molasses, alcohol waste liquid, etc. can be used as the binder liquid. In addition, black pigment is
In addition to carbon black, black Bengara (Fe203), fly assier, etc. may also be used.

After grading with the rotary dryer 5, the particles were passed through a 4fi sieve 6 to further improve accuracy, but there were almost no particles with a particle size of 4n or more.

〔Effect of the invention〕

As is clear from the above, 60 to 80% of the snow-melting material of the present invention has a particle size of 0.35 to 1.2 mm.
Because it has a composition that accounts for
It hardly scatters in the wind, stains clothes or skin, or settles in the snow like conventional granular snow melting materials, and it stays on top of the snow where it is applied, effectively collecting sunlight. Demonstrates sufficient snow melting effect.

[Brief explanation of drawings]

The drawing is a flowchart showing one example of the method for manufacturing the anti-scattering and snow-melting material of the present invention.

Claims (1)

[Claims] 1. A snow melting material made by adding a black pigment such as carbon black and a binder liquid to raw material powder and granulating it, with 60 to 80% of the material having a particle size of 0.35 to 1.2 mm. A snow melting material for preventing scattering and melting snow.