Method for preventing adhesion and clogging of mineral raw material

A technology of mineral raw materials and raw materials, applied in chemical instruments and methods, dry solid materials, transportation and packaging, etc., can solve problems such as pipe blockage, coal transportation efficiency reduction, thermal power plant power generation efficiency reduction, etc., to achieve effective transportation and prevent adhesion and clogging effect

Inactive Publication Date: 2019-05-21
KURITA INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if it is not in the slurry state as described above, the coal in a wet state is likely to adhere to the contact surface of the piping (coal feeding pipe) that supplies the coal to the boiler, the belt conveyor, the chute, the hopper, and other conveying equipment. When solidification causes clogging of piping, etc.
[0007] In the case of such adhesi

Method used

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  • Method for preventing adhesion and clogging of mineral raw material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0061] (Example 1)

[0062] With respect to 1000 g of moist coal (water content of 15.5% by mass, particle size of 2 mm or less), 0.1% by mass of "KURILINE S-200" (manufactured by Kurita Industry Co., Ltd.; sodium polyacrylate) as a super absorbent resin is added and stirred uniformly After mixing, a sample of the raw material mixture was prepared.

[0063] Used in the upper part of the electric screen ("ANF-30", manufactured by Nitto Scientific Co., Ltd.), a simulated hopper is installed instead of the screen (input port: 200mm×200mm, discharge port: 30mm×50mm inverted quadrangular pyramid cone shape; made of steel ) Vibration test device, the adhesion evaluation test of the raw material mixture sample was carried out.

[0064] The adhesion evaluation was performed by putting the prepared raw material mixture sample into a simulation hopper of the vibration test device, and measuring the discharge time from the start of the input until it fell to the tray under the vibration test d...

Example

[0067] (Examples 2~4)

[0068] Except for changing the water content of coal and the addition amount of super absorbent resin as shown in Table 1 below, the discharge time of the raw material mixture sample was measured in the same manner as in Example 1.

Example

[0069] (Comparative Examples 1 and 2)

[0070] In Examples 1 and 3, except that the super absorbent resin was not added, the discharge time of the raw material mixture sample was measured in the same manner as in Example 1 except that the super absorbent resin was not added.

[0071] Table 1 shows the results of the adhesion evaluation test in each of the above-mentioned Examples and Comparative Examples.

[0072] [Table 1]

[0073] Table 1

[0074]

[0075] From the results shown in Table 1, it can be seen that by adding KURILINE S-200 to the wet coal, the discharge time of the raw material mixture sample from the simulated hopper was shortened, and it was confirmed that adhesion was suppressed.

[0076] In addition, visual observation of the upper part of the simulated hopper after the test confirmed that the adhesion amount of the raw material mixture sample was reduced.

[0077] It can be said that by adding KURILINE S-200 to wet coal, the adhesion of coal to the contact surface of th...

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PUM

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Abstract

Provided is a method for easily preventing adhesion and clogging of wet mineral raw material, such as coal, iron ore, dust, coke, or limestone, in transportation equipment, such as piping. This methodcomprises a step for obtaining a raw material mixture with superabsorbent resin in contact with the wet mineral raw material by spraying superabsorbent resin on the wet mineral raw material before orduring the transportation thereof using a belt conveyor. Thus, the material mixture is transported using the transportation equipment and the adhesion and clogging of the mineral material in the transportation equipment is prevented.

Description

technical field [0001] The invention relates to a method for preventing adhesion and clogging of wet mineral raw material in conveying equipment. Background technique [0002] When the ironmaking raw materials are transported to the ironworks by the bulk carrier, the ironmaking raw materials in the lower part of the accumulation are in a slurry state due to the water accumulated on the floor of the ship's warehouse. In addition, when stored in the raw material yard in the state of being piled in the open air, it may become a slurry state due to water such as rainwater or sprinkler water for dust prevention. [0003] Such mineral raw material slurry such as ironmaking raw materials in a slurry state is a muddy fluid substance with a lot of water content, so there is a problem that it is difficult to carry out from ship warehouses and raw material yards. [0004] In view of such a problem, the present inventors proposed a transportation method, that is, a polymer absorbent is...

Claims

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Application Information

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IPC IPC(8): B65G69/20C22B1/00F26B5/16
CPCC22B1/00B01F23/60B01F35/71F26B5/16B65G69/20B65G2201/045
Inventor 吉川崇森胜己
Owner KURITA INDUSTRIAL CO LTD
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