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Wet carbide slag screening decontamination method

A technology of calcium carbide slag and calcium carbide slag slurry, which is applied to chemical instruments and methods, screening, magnetic separation, etc., can solve problems such as easy blockage, low efficiency, and poor purification effect, and achieve production cost saving, high efficiency, and impurity The effect of content reduction

Pending Publication Date: 2018-03-23
新疆国峰嘉和环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for screening and removing impurities from wet calcium carbide slag, so as to overcome the screening problems such as easy blockage, low efficiency, and poor purification effect that exist in the traditional high-viscosity carbide slag slurry screening and removal process. , greatly improve the screening effect and work efficiency, reduce the equipment volume and investment cost, and realize the large-scale industrial application of wet carbide slag separation and purification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: comprise the following steps:

[0029] (1) Settling: transport the wet-process calcium carbide slurry with a solid content of 8 to 12% to the settling tank, and settling and separating impurities such as ferrosilicon and large-grained carbon particles with a particle size of less than 1mm materials;

[0030] (2) Initial separation by vibrating sieve: the material separated in the above step (1) is subjected to 2 times of vibrating sieving, the mesh numbers of the vibrating sieve are respectively 20 mesh and 100 mesh, which can screen out particles with a particle size greater than 0.85mm respectively. and large particle impurities with a particle size greater than 0.15mm, and then the sieved calcium carbide slurry is directly entered into the ultrasonic vibrating screen for screening by the pipeline;

[0031] (3) Ultrasonic vibrating sieve subdivision: introduce the carbide slag slurry sieved through the above step (2) into a single-layer ultrasonic vibra...

Embodiment 2

[0033] Embodiment 2: comprise the following steps:

[0034] (1) Settling: transport the wet-process calcium carbide slurry with a solid content of 8 to 12% to the settling tank, and settling and separating impurities such as ferrosilicon and large-grained carbon particles with a particle size of less than 1mm materials;

[0035] (2) Initial separation by vibrating sieve: the material separated in the above step (1) is subjected to 2 times of vibrating sieving, the mesh numbers of the vibrating sieve are respectively 20 mesh and 100 mesh, which can screen out particles with a particle size greater than 0.85mm respectively. and large particle impurities with a particle size greater than 0.15mm, and then the sieved calcium carbide slurry is directly entered into the ultrasonic vibrating screen for screening by the pipeline;

[0036] (3) Ultrasonic vibrating sieve subdivision: introduce the carbide slag slurry sieved through the above step (2) into a single-layer ultrasonic vibra...

Embodiment 3

[0038] Embodiment 3: comprise the following steps:

[0039] (1) Settling: transport the wet-process calcium carbide slurry with a solid content of 8 to 12% to the settling tank, and settling and separating impurities such as ferrosilicon and large-grained carbon particles with a particle size of less than 1mm materials;

[0040] (2) Initial separation by vibrating sieve: the material separated in the above step (1) is subjected to 2 times of vibrating sieving, the mesh numbers of the vibrating sieve are respectively 20 mesh and 100 mesh, which can screen out particles with a particle size greater than 0.85mm respectively. and large particle impurities with a particle size greater than 0.15mm, and then the sieved calcium carbide slurry is directly entered into the ultrasonic vibrating screen for screening by the pipeline;

[0041] (3) Ultrasonic vibrating sieve subdivision: introduce the calcium carbide slag slurry sieved through the above step (2) into 2 layers of ultrasonic ...

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Abstract

The invention discloses a wet carbide slag screening decontamination method. The method is characterized by comprising the following steps: (1) wet carbide slag is settled to separate such impuritiesas ferrosilicon and carbon particles; (2) the wet carbide slag is primarily screened at least by two times through a vibration screen; (3) the wet carbide slag is fed in a single-layer or multi-layerultrasonic vibration screen for screening; and (4) the wet carbide slag is electromagnetically decontaminated. Compared with the prior art, the method overcomes such screening difficulties as easy screen blockage, low efficiency and weak purifying effect in a traditional high-viscosity carbide slag pulp screening decontamination process, greatly improves the screening effect and the working efficiency, reduces the equipment size and the investment cost, and realizes large-scale industrial application of wet carbide slag separation purification.

Description

technical field [0001] The invention relates to a method for screening and removing impurities by wet carbide slag, which belongs to the technical field of chemical industry. Background technique [0002] Carbide slag is the solid residue after calcium carbide produces acetylene gas. According to the ratio of calcium carbide to water in the production of acetylene, it can be divided into dry acetylene and wet acetylene. The moisture content of calcium carbide slag produced by wet acetylene is between 85% and 92%. After sedimentation and pressure filtration, it becomes wet calcium carbide slag with a moisture content of 30% to 40%, and then it is shipped out for disposal or reused. [0003] The main component of carbide slag is Ca(OH) 2 , in addition to containing unreacted carbon particles, SiO 2 、Al 2 o 3 , sulfide, oxides of metals such as magnesium and iron, inorganic substances such as hydroxides, and a small amount of organic substances. Impurities in calcium carbi...

Claims

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Application Information

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IPC IPC(8): B07B1/28B07B1/42B07B1/46B03C1/30
CPCB03C1/30B07B1/28B07B1/42B07B1/46B07B1/4609
Inventor 但建明刘峰杨志文李洪玲洪成林乔秀文于峰姜丽娜车蜀涛
Owner 新疆国峰嘉和环保科技有限公司