An efficient method for separating mortar based on temperature sensitivity

Abstract

A method for efficiently separating mortar based on temperature sensitivity. The waste mortar liquid produced during cutting is transported to a cooling cylinder to cool to 5°C-10°C to obtain a low-temperature waste mortar liquid. The low-temperature waste mortar liquid is solidified using the first centrifuge. Liquid separation treatment, after separation, solid phase silicon carbide and liquid phase suspension are obtained, the liquid phase suspension is transported to the heating cylinder, and the liquid phase suspension is heated to 80°C-90°C while stirring in the heating cylinder to obtain high temperature suspension liquid, use the second centrifuge to separate the high-temperature suspension from solid to liquid, and obtain solid-phase waste silicon mud and liquid-phase polyethylene glycol after separation, and prepare solid-phase silicon carbide and liquid-phase polyethylene glycol to obtain mortar Liquid, return the mortar liquid to the multi-wire cutting machine for reuse, using the temperature to affect the kinematic viscosity of the mortar, the kinematic viscosity affects the sedimentation velocity, and the sedimentation velocity acts on the effect of centrifugal separation. Set the appropriate temperature according to the characteristics of different links, so as to efficiently separate the mortar Silica fume in.

Description

technical field

[0001] The invention belongs to the field of separating mortar, in particular to a method for efficiently separating mortar based on temperature sensitivity. Background technique

[0002] The solar silicon wafer cutting process generally adopts a multi-line mortar cutting process. The mortar composed of silicon carbide and suspension (polyethylene glycol PEG) is its main consumable. After cutting the silicon wafer, the mortar contains more silicon powder, which affects the quality of the mortar. Generally, centrifugal recovery equipment is used to separate the silicon powder to achieve reuse. The recovery machine is mainly composed of two centrifuges. The first centrifuge recovers silicon carbide, and at the same time produces a suspension and a mixture of silicon powder. The centrifuge separates the mixed liquid into a suspension and a muddy silicon powder, and the silicon carbide and the suspension are reconstituted into the required mortar. However, the t...

Examples

Embodiment 1

[0023] Such as figure 1 As shown, it includes a cooling cylinder 11, the cooling cylinder 11 is connected to the raw material input port of the first centrifuge 14 through a pipeline, and the raw material output port of the first centrifuge 14 is connected to the heating cylinder 15 through a pipeline, and the first centrifuge 14 The centrifuge product port is aligned to the recovery cylinder 13, and the heating cylinder 15 is connected to the raw material input port of the second centrifuge 17 through a pipeline, and the raw material output port of the second centrifuge 17 is connected to the recovery cylinder 13 through a pipeline.

[0024] The periphery of the cooling cylinder 11 is surrounded by cooling water pipes, and a temperature sensor is arranged inside the cooling cylinder 11. The cooling cylinder 11 is also sealed with a thermal insulation cover, and the cooling cylinder 11 is wrapped with a heat insulating material to prevent the external environment from affecting...

Embodiment 2

[0029] The concrete steps of a kind of processing method based on temperature sensitivity high-efficiency separation mortar are:

[0030] S1: Transport the waste mortar liquid generated during the operation of the multi-wire cutting machine to the cooling cylinder 11, and the cooling cylinder 11 starts to stir and cool down according to the temperature set by the external control equipment, and the waste mortar is cooled to 6 in the cooling cylinder 11. °C to obtain a low-temperature waste mortar liquid at 6 °C.

[0031] S2: Transport the 6°C low-temperature waste mortar liquid to the first centrifuge 14 via the extraction pump, and the first centrifuge 14 performs solid-liquid separation treatment on the 6°C low-temperature waste mortar liquid obtained in step S1. The waste mortar liquid still maintains a certain viscosity, but the sedimentation speed of silicon carbide micropowder with different particle sizes is different. The centrifuge preferentially separates large parti...

Embodiment 3

[0036] Embodiment 3 describes the realization mechanism of the present invention in combination with data.

[0037] Table 1: The effect of temperature on the sedimentation velocity of different particle sizes.

[0038]

[0039] Table 2: Effect of Temperature on Viscosity

[0040] temperature °C

Viscosity mPa.s

5

332

25

288

90

116

[0041] It can be seen from Table 1 that in the same temperature range (5°C-25°C), the speed reduction ratio of silicon carbide particles with a particle size of 2 μm is 55.56%, and the speed reduction ratio of silicon carbide particles with a particle size of 15 μm is 29.39%, the more obvious the speed reduction, the more difficult it is for small particles of silicon carbide to be centrifuged. It can be seen that lowering the temperature can reduce the recovery of small particle size silicon carbide micropowder.

[0042] It can be seen from Table 2 that the lower the temperature, the greater the vis...

technical field

[0001] The invention belongs to the field of separating mortar, in particular to a method for efficiently separating mortar based on temperature sensitivity. Background technique

[0002] The solar silicon wafer cutting process generally adopts a multi-line mortar cutting process. The mortar composed of silicon carbide and suspension (polyethylene glycol PEG) is its main consumable. After cutting the silicon wafer, the mortar contains more silicon powder, which affects the quality of the mortar. Generally, centrifugal recovery equipment is used to separate the silicon powder to achieve reuse. The recovery machine is mainly composed of two centrifuges. The first centrifuge recovers silicon carbide, and at the same time produces a suspension and a mixture of silicon powder. The centrifuge separates the mixed liquid into a suspension and a muddy silicon powder, and the silicon carbide and the suspension are reconstituted into the required mortar. However, the t...

Examples

Embodiment 1

[0023] Such as figure 1 As shown, it includes a cooling cylinder 11, the cooling cylinder 11 is connected to the raw material input port of the first centrifuge 14 through a pipeline, and the raw material output port of the first centrifuge 14 is connected to the heating cylinder 15 through a pipeline, and the first centrifuge 14 The centrifuge product port is aligned to the recovery cylinder 13, and the heating cylinder 15 is connected to the raw material input port of the second centrifuge 17 through a pipeline, and the raw material output port of the second centrifuge 17 is connected to the recovery cylinder 13 through a pipeline.

[0024] The periphery of the cooling cylinder 11 is surrounded by cooling water pipes, and a temperature sensor is arranged inside the cooling cylinder 11. The cooling cylinder 11 is also sealed with a thermal insulation cover, and the cooling cylinder 11 is wrapped with a heat insulating material to prevent the external environment from affecting...

Embodiment 2

[0029] The concrete steps of a kind of processing method based on temperature sensitivity high-efficiency separation mortar are:

[0030] S1: Transport the waste mortar liquid generated during the operation of the multi-wire cutting machine to the cooling cylinder 11, and the cooling cylinder 11 starts to stir and cool down according to the temperature set by the external control equipment, and the waste mortar is cooled to 6 in the cooling cylinder 11. °C to obtain a low-temperature waste mortar liquid at 6 °C.

[0031] S2: Transport the 6°C low-temperature waste mortar liquid to the first centrifuge 14 via the extraction pump, and the first centrifuge 14 performs solid-liquid separation treatment on the 6°C low-temperature waste mortar liquid obtained in step S1. The waste mortar liquid still maintains a certain viscosity, but the sedimentation speed of silicon carbide micropowder with different particle sizes is different. The centrifuge preferentially separates large parti...

Embodiment 3

[0036] Embodiment 3 describes the realization mechanism of the present invention in combination with data.

[0037] Table 1: The effect of temperature on the sedimentation velocity of different particle sizes.

[0038]

[0039] Table 2: Effect of Temperature on Viscosity

[0040] temperature °C

Viscosity mPa.s

5

332

25

288

90

116

[0041] It can be seen from Table 1 that in the same temperature range (5°C-25°C), the speed reduction ratio of silicon carbide particles with a particle size of 2 μm is 55.56%, and the speed reduction ratio of silicon carbide particles with a particle size of 15 μm is 29.39%, the more obvious the speed reduction, the more difficult it is for small particles of silicon carbide to be centrifuged. It can be seen that lowering the temperature can reduce the recovery of small particle size silicon carbide micropowder.

[0042] It can be seen from Table 2 that the lower the temperature, the greater the vis...

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