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Treatment method for waste strontium permanent magnetic ferrite slurry with unqualified magnetic performance

The technology of permanent magnet ferrite and ferrite is applied in the field of disposal of scrap pulp with unqualified magnetic properties. Effect

Active Publication Date: 2020-07-10
自贡市江阳磁材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, scrapping slurry will cause waste of resources, and will also cause adverse effects on the environment; if it is downshifted, it will also cause a large increase in production costs; according to the degree of its decline, the appropriate amount of addition will not be too much, which will cause Occupation of resources or increase of new quality risks

Method used

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  • Treatment method for waste strontium permanent magnetic ferrite slurry with unqualified magnetic performance
  • Treatment method for waste strontium permanent magnetic ferrite slurry with unqualified magnetic performance
  • Treatment method for waste strontium permanent magnetic ferrite slurry with unqualified magnetic performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 The method for processing the scrap slurry with unqualified magnetic properties of strontium permanent magnet ferrite includes the following steps: analyzing the particle size and pH value of the scrap slurry with unqualified magnetic properties, and when the particle size is normal and the pH value is higher than the normal value, the following steps are carried out: One step→calculate and weigh the combined additives required for scrap slurry→add warm water to pre-mix, add to the stirring (tank) tower for stirring→dehydration→forming→sintering.

[0020] In the above steps, analyze the particle size of the waste slurry and the particle size of the PH value to test with an average particle size tester, and the pH value to test with a PH tester; the combined additive is composed of silicon oxide and boric acid, and the added amount of the silicon oxide is 1% of the scrap slurry. The weight of 0.01% ~ 1.0% Wt, the amount of boric acid added is 0.01% ~ 0.5...

Embodiment 2

[0026]The permanent magnet ferrite wet process produces Y30H-1 material, the particle size requirement of a ball mill: 0.8-1.0um. Material standards (enterprise standards) are as follows: Br: 390MT, Hcb: 245KA / m Hcj: 255KA / m BHmax 29KJ / m 3 , the material properties are as follows: Br: 393MT, Hcb: 221KA / m Hcj: 233KA / m BHmax 29KJ / m 3 , The magnetic properties do not meet the standard requirements, and it is a scrap slurry. The slurry in the storage tower has been graded and precipitated, and the separation of material and water is obvious. Add 0.15% silicon dioxide SiO to scrap slurry weight in the scrap slurry 2 and 0.15% boric acid H 3 BO 3 , add 10 kg of 40-80 ℃ hot water, mix evenly, add to the storage tower and stir for 1 / 2 / 3 / 4 / 5 / 6 hours, and take samples for testing.

[0027] A. Take the particle size test and compare it with the following table 2:

[0028] Table 2

[0029]

[0030] B.PH value / performance changes with sampling time as shown in Table 3:

[0031] ...

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Abstract

The invention relates to the technical field of scrapped materials, in particular to a treatment method for waste strontium permanent magnetic ferrite slurry with unqualified magnetic performance. Thetreatment method comprises the following steps: analyzing the granularity and the PH value of waste slurry, performing calculation and weighing a combined additive required by the waste slurry, adding warm water for premixing, adding the mixture into a stirring (tank) tower for stirring, dehydrating, forming and sintering. According to the treatment method for waste strontium permanent magnetic ferrite slurry with unqualified magnetic performance, two additives are combined and added in a stirring manner, so that the performance problem of waste slurry with unqualified performance and the problems of high pH value, magnetic powder agglomeration, manual labor cost, fine granularity caused by back grinding of the waste slurry, poor formability and low qualification rate can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet ferrite production, in particular to a method for treating unqualified magnetic properties and scrapping slurry produced by strontium and barium running in the process of strontium permanent magnet ferrite. Background technique [0002] Strontium permanent magnet ferrite, its main component is MO.6Fe 2 o 3 , M=Ba, Sr, Pb and Ca (with La) simple substance and compound, it belongs to ceramic material, the main raw material used in the preparation is iron scale or iron red and strontium, calcium compound, which is characterized by magnetic properties Br / / Hcj / BHmax is high, that is, "three high" materials. Its production process is as follows: First, mix iron oxide, strontium carbonate, etc., and undergo a preliminary solid-phase reaction through pre-calcination to obtain pre-sintered blocks (or balls). It is finely ground to a slurry with an average particle size of 0.5-1.0 μm. Then the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/2683C04B35/62204C04B2235/3409C04B2235/3418C04B2235/96
Inventor 刘力白枭龙国俊邓志刚
Owner 自贡市江阳磁材有限责任公司