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A kind of particle size control method of insoluble sulfur

A technology of particle size control and solubility, which is applied in the field of preparation of insoluble sulfur, can solve the problems that are not conducive to the automation and continuity of the production process, and achieve the effects of reducing energy consumption, avoiding safety accidents, and improving safety

Active Publication Date: 2022-08-09
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process inevitably requires manual intervention, which is not conducive to the automation and serialization of the production process

Method used

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  • A kind of particle size control method of insoluble sulfur
  • A kind of particle size control method of insoluble sulfur
  • A kind of particle size control method of insoluble sulfur

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 provides a kind of particle size control method of insoluble sulphur, comprising the steps of following successively:

[0052] 1) The slurry containing insoluble sulfur and carbon disulfide produced in the upstream quenching process is added to the buffer tank 1, and the buffer tank 1 is provided with a stirring device 2, and the insoluble sulfur is uniformly distributed in the slurry by stirring;

[0053] A shear pump 3 is provided outside the buffer tank 1, the feed port of the shear pump 3 is communicated with the bottom of the inner cavity of the buffer tank 1 through a pipeline, and the discharge port of the shear pump 3 is connected to the buffer tank 1 through a pipeline. The top of the cavity in the tank is connected, and the shear pump 3 shears, disperses, emulsifies and pulverizes the insoluble sulfur particles in the slurry when the slurry flows through the shear pump 3;

[0054] 2) The feed port of the circulating pump 4 is communicated with the...

Embodiment 2

[0064] According to the method of Embodiment 1, the difference is that the first flow control valve 701, the second flow control valve 702, the third flow control valve 703, the fourth flow control valve 704, and the fifth flow control valve 705 are adjusted to make The flow ratio is 3:20:6:3:8, the concentration of insoluble sulfur in the obtained slurry C (thick and fine slurry) is 27.3% (mass percentage), and the insoluble sulfur of the finished product obtained after separation and drying is in accordance with GB / Tested by T18952-2017, the purity of the finished insoluble sulfur powder is 96.7wt%, the thermal stability (105℃*15min) is 85.9wt%, and its particle size distribution is shown in the appendix Figure 2b .

Embodiment 3

[0066] According to the method of Embodiment 1, the difference is that the first flow control valve 701, the second flow control valve 702, the third flow control valve 703, the fourth flow control valve 704, and the fifth flow control valve 705 are adjusted to make The flow ratio is 13:100:28:18:41, and the concentration of insoluble sulfur in the slurry C (thick and fine slurry) is 31.6% (mass percentage). The insoluble sulfur of the finished product obtained after separation and drying is in accordance with GB / Tested by T18952-2017, the purity of the finished insoluble sulfur powder is 97.4wt%, the thermal stability (105℃*15min) is 84.3wt%, and its particle size distribution is shown in the appendix Figure 2c .

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Abstract

The present application provides a particle size control method of insoluble sulfur. The slurry produced by the upstream quenching process is added to a buffer tank, and then the insoluble sulfur is circulated at high speed through mechanical stirring, shear pump and slurry in the pipeline. Sulfur crushing; the circulating pump drives the slurry in the buffer tank into the first-stage cyclone, the coarse slurry flows back into the buffer tank from the bottom outlet of the first-stage cyclone, and the fine slurry flows from the top of the first-stage cyclone. The outlet flows into the secondary cyclone, and the particle size and concentration of the insoluble sulfur particles in the fine slurry can be controlled by adjusting the flow rate of the inlet and outlet of the primary cyclone; the thin slurry exits from the top of the secondary cyclone Flow out into the buffer tank, the thick and fine slurry flows out from the bottom outlet of the secondary cyclone, and the particle size and concentration of the thick and fine slurry are controlled by adjusting the flow rate of the inlet and outlet of the secondary cyclone; the thick and fine slurry is separated and dried After that, the insoluble sulfur of the finished product can be obtained, which completely and subversively changes the particle size control method of the insoluble sulfur.

Description

technical field [0001] The invention relates to the technical field of preparation of insoluble sulfur, in particular to a particle size control method of insoluble sulfur. Background technique [0002] Insoluble sulfur is an excellent rubber vulcanizing agent, and its particle size has a great influence on its physical and chemical indicators and subsequent applications. If the particle size of the finished product is too large, it will cause uneven mixing and distribution in the tire industry application process, so the national standard requires that the particle size of the finished product should be controlled within the range of ≤ 150 microns, and the size and distribution of the particle size will also affect its physical and chemical indicators. . At present, the production of insoluble sulfur in the industry mostly controls the particle size of the finished product by separating and drying, then pulverizing and sieving. This method has caused adverse consequences ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C21/00B02C23/36B04C5/26B04C11/00C01B17/12
CPCB02C21/00B02C23/36B04C5/26B04C11/00C01B17/12Y02P20/10
Inventor 王维民魏承磊孙庆刚刘希航郭庆飞孙云奇
Owner SHANDONG YANGGU HUATAI CHEM