CN-121972292-A - Method for removing magnetic impurities in slurry

Abstract

The invention discloses a method for removing magnetic impurities in slurry, which comprises the steps of constructing a flow path for enabling the slurry to sequentially flow through each unit based on a plurality of modularized slurry treatment units, driving the slurry to flow along the flow path, enabling the magnetic impurities in the slurry to be adsorbed by magnetic rods arranged in each unit, monitoring preset parameters related to the adsorption state of each magnetic rod, stopping slurry pumping when the preset parameters reach a preset cleaning threshold value for any magnetic rod, executing automatic cleaning operation on the magnetic rod, and recovering slurry pumping after cleaning is completed, so that a system continues to operate. According to the slurry magnetic impurity removing method, the slurry is efficiently and continuously purified through the slurry treatment units which are arranged in a modularized mode.

Inventors

• ZHANG TUOYING
• ZI XIAOLIN
• YANG GUANPING

Assignees

• 东莞市硕杰科技有限公司

Dates

Publication Date

20260505

Application Date

20260128

Claims (10)

1. 1. A method for removing magnetic impurities from slurry, comprising: Constructing a flow path for the slurry to flow through each unit in turn based on the plurality of modular slurry treatment units; driving the slurry to flow along a flow path, so that magnetic impurities in the slurry are adsorbed by magnetic rods arranged in each unit; monitoring preset parameters related to the adsorption state of each magnetic rod; Stopping slurry pumping when the preset parameters reach a preset cleaning threshold value for any magnetic rod, and executing automatic cleaning operation on the magnetic rod; after the cleaning is completed, slurry pumping is resumed, and the system continues to operate.
2. 2. The slurry magnetic impurity removal method according to claim 1, wherein the number of activated slurry treatment units is determined according to at least one of a predicted content, a physical property, or a target purification accuracy of magnetic impurities in slurry when constructing the flow path.
3. 3. The method of claim 1, wherein the flow paths are configured such that the slurry flows through the adjacent two slurry treatment units in opposite general directions.
4. 4. A slurry magnetic impurity removal method according to claim 3, wherein the number of activation of the slurry treatment units is an even number in order to achieve the reversal of the bulk flow direction.
5. 5. The method for removing magnetic impurities from slurry according to claim 1, wherein a flow rate of the slurry in the flow path is controlled by adjusting an output of a pump provided at a start end of the flow path.
6. 6. The method of claim 1, wherein the predetermined parameter is a time integrated value, and the cleaning threshold corresponds to a predetermined continuous operation time period.
7. 7. The method of claim 1, wherein the automatic cleaning operation comprises: removing the magnetic rod from the working position of the magnetic rod in the corresponding slurry treatment unit; Performing a wiping operation on the exposed magnetic rod surface to remove and collect the magnetic impurities adsorbed by the magnetic rod surface; Resetting the cleaned magnetic rod to the working position, and recovering the sealing state of the slurry treatment unit.
8. 8. The slurry magnetic impurity removal method according to claim 7, wherein the performing a wiping operation on the exposed magnetic rod surface includes: moving a receiving tray to a receiving position below the magnetic rod; A scraping ring arranged outside the magnetic rod is driven to move along the axial direction of the magnetic rod so as to scrape magnetic impurities on the surface of the magnetic rod and enable the scraped impurities to fall into the receiving tray; And moving the receiving tray away from the receiving position and resetting the scraping ring.
9. 9. The method for removing magnetic impurities from slurry according to claim 1 or 7, wherein the slurry treatment unit is a sealed tank arranged vertically, and the magnetic rod is lifted and lowered in a vertical direction to realize removal and reset.
10. 10. The method of claim 8, wherein the impurities collected in the tray are transferred to a concentrated waste container through a discharge pipe connected to the bottom thereof after the tray is removed.

Description

Method for removing magnetic impurities in slurry Technical Field The invention relates to the technical field of material purification, in particular to a method for removing magnetic impurities in slurry. Background In many industrial fields such as chemical industry, food industry, pharmaceutical industry, ceramic industry, and new energy materials, slurries (or fluid products) are widely used as a common material form. The slurry is extremely easy to mix into or produce magnetic impurities (such as scrap iron, iron oxide particles, metal micro powder introduced by abrasion, and the like) in the links of production, transportation or raw material sources. The presence of these magnetic impurities can adversely affect the operation of the apparatus and the quality of the product. At present, a magnetic rod type iron remover is commonly adopted in the industry to remove iron from slurry. In the conventional bar magnet iron removal device, a single bar magnet or a plurality of bar magnets are usually installed in a flow channel or a tank, and when slurry flows around the bar magnet, ferromagnetic impurities in the slurry are adsorbed on the surface of the bar magnet. However, the traditional structure has a plurality of remarkable defects that firstly, an integral structure is adopted, the arrangement density and the action range of a magnetic field are difficult to flexibly adjust according to the change of the treatment capacity, the flow speed or the impurity load, secondly, the iron removal operation is carried out by manually and regularly extracting a magnetic rod for manual cleaning, the labor intensity is high, and the cleaning period is difficult to accurately control. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a method for removing magnetic impurities in slurry, which realizes efficient and continuous impurity removal and purification of slurry through slurry treatment units arranged in a modularized manner. In order to achieve the above object, a slurry magnetic impurity removing method of the present invention includes: Constructing a flow path for the slurry to flow through each unit in turn based on the plurality of modular slurry treatment units; driving the slurry to flow along a flow path, so that magnetic impurities in the slurry are adsorbed by magnetic rods arranged in each unit; monitoring preset parameters related to the adsorption state of each magnetic rod; Stopping slurry pumping when the preset parameters reach a preset cleaning threshold value for any magnetic rod, and executing automatic cleaning operation on the magnetic rod; after the cleaning is completed, slurry pumping is resumed, and the system continues to operate. Optionally, in constructing the flow path, the number of slurry treatment units that are enabled is determined based on at least one of the estimated content of magnetic impurities in the slurry, the physical properties, or the target purification accuracy. Alternatively, the constructed flow path is configured such that the overall flow direction of the slurry through adjacent two slurry treatment units is reversed. Optionally, to achieve the opposite overall flow direction, the slurry treatment units are activated in an even number. Optionally, the flow rate of the slurry in the flow path is controlled by adjusting the output of a pump provided at the start end of the flow path. Optionally, the preset parameter is a time accumulated value, and the cleaning threshold corresponds to a preset continuous operation duration. Optionally, the automatic cleaning operation includes: removing the magnetic rod from the working position of the magnetic rod in the corresponding slurry treatment unit; Performing a wiping operation on the exposed magnetic rod surface to remove and collect the magnetic impurities adsorbed by the magnetic rod surface; Resetting the cleaned magnetic rod to the working position, and recovering the sealing state of the slurry treatment unit. Optionally, the performing a wiping operation on the exposed magnetic bar surface includes: moving a receiving tray to a receiving position below the magnetic rod; A scraping ring arranged outside the magnetic rod is driven to move along the axial direction of the magnetic rod so as to scrape magnetic impurities on the surface of the magnetic rod and enable the scraped impurities to fall into the receiving tray; And moving the receiving tray away from the receiving position and resetting the scraping ring. Optionally, the slurry treatment unit is a sealed tank body arranged vertically, and the magnetic rod performs lifting motion along the vertical direction so as to realize moving out and resetting. Optionally, after the receiving tray is removed, the impurities collected therein are transferred to a centralized waste container via a discharge pipe connected to the bottom thereof. Compared with the prior art, the invention has the beneficial effects that: