Preparation method of iron tailing reinforced rubber functional filler

A technology of functional filler and reinforced rubber, which is applied in the field of comprehensive utilization of solid waste and the preparation of new composite materials, and can solve problems such as lack of technical methods

Active Publication Date: 2022-01-14
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these patents propose the use of iron tailings to reinforce rubber, most of them lack the support of effective technical methods for how to obtain surface-modified iron tailings powder with rubber reinforcement function and uniform particle size.

Method used

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  • Preparation method of iron tailing reinforced rubber functional filler
  • Preparation method of iron tailing reinforced rubber functional filler
  • Preparation method of iron tailing reinforced rubber functional filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The fine-grained iron tailings slurry overflowing from the cyclone classification of the mine concentrator is sent to a 1000rpm low-speed centrifuge for separation, and the ultra-fine iron tailings suspension slurry with a particle size of less than 5 microns is obtained from the discharge port, and the fine-grained iron tailings slurry is obtained from the sand discharge port. Particles with a diameter greater than 5 microns (that is, grit); the grit is added to the planetary high-energy ball mill, and the grinding speed is 1000rpm, the material-to-ball ratio is 1:4, and the solid-liquid ratio is 1:4, and the grinding is carried out for 240 minutes. into a low-speed centrifuge, and sorted again at a speed of 1000rpm to obtain ultra-fine iron tailings suspension slurry with a particle size of less than 5 microns and particles with a particle size greater than 5 microns (the particles are partially discarded or continue high-energy ball milling); the slurry Partially use ...

Embodiment 2

[0036] The overflow from the cyclone classification of the mine concentrator is sent to a 400rpm centrifuge for separation, and the sand is added to a planetary high-energy ball mill. Under the conditions of a rotation speed of 1500rpm, a material-to-ball ratio of 1:4, and a solid-to-liquid ratio of 1:4, it is ground for 30 minutes. After ball milling The ore pulp is sent to the low-speed centrifuge again, and is sorted again at a speed of 400rpm. The pulp part is dehydrated at a high speed by a horizontal centrifuge at a speed of 2800rpm. 0.1M NaOH to adjust the pH value to 7.5, add KH-570 diluted with 10 times of industrial ethanol, the amount of KH-570 added is 1% of the mass of solid particles in the thick ore slime, stir at 800rpm for 30min, and introduce into the plane shear after the combination of rotor and stator A high-shear colloid mill with a crushing distance of 0.05 mm and a rotor speed of 2900 rpm, and finally disperse for 30 minutes. Then dry at 105°C, disperse...

Embodiment 3

[0039] The overflow from the cyclone classification of the mine concentrator is sent to the 800rpm centrifuge for separation, and the sand is added to the planetary high-energy ball mill. At the speed of 1200rpm, the ratio of material to ball is 1:4, and the ratio of solid to liquid is 1:4. Grinding for 60 minutes, after ball milling The ore pulp is sent to the low-speed centrifuge again, and is sorted again at a speed of 800rpm. The pulp part is dehydrated at a high speed by a horizontal centrifuge at a speed of 2500rpm. 0.1MH 2 SO 4 Adjust the pH value to 6.5, add titanate diluted with 5 times industrial ethanol, the amount of titanate added is 2.5% of the mass of solid particles in the thick ore slime, stir at 700rpm for 60min, and then import into the plane shear crushing after the combination of rotor and stator A high-shear colloid mill with a distance of 0.10mm and a rotor speed of 2900rpm, and finally disperse for 30min. Then dry at 105°C, disperse in a 500rpm ball m...

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Abstract

The invention relates to a preparation method of an iron tailing reinforced rubber functional filler. According to the method, firstly, a low-speed centrifugal machine is adopted, coarse particles in ore pulp are effectively separated out through an artificial gravity field, then the coarse particles are subjected to superfine grinding through a high-energy ball mill, and therefore the grinding and smashing efficiency of powder can be greatly improved; directly surface modification is performed on the dehydrated concentrated ore pulp; and finally, secondary agglomerated particles formed in the ultrafine crushing process are re-dispersed by means of a high-shear colloid mill with the plane shear crushing distance of 0.01-0.10 mm, and finally the modified iron tailing powder with fine particles and uniform particle size is obtained. According to the method, the use amount of carbon black can be reduced or saved, grinding is carried out through separation and quality separation, the ore grinding cost can be effectively reduced, and the production efficiency and the resource utilization rate are improved.

Description

technical field [0001] The invention relates to a method for preparing high-quality rubber reinforcing filler by using iron tailings as a raw material, and belongs to the field of comprehensive utilization of solid waste and preparation of new composite materials. Background technique [0002] Over the past few decades, the rapid development of national construction and economy has made the development of mineral resources reach an unprecedented scale. Currently, more than 10 billion tons of tailings are piled up by mines in my country, and more than 70% of them are iron tailings. A large number of tailings stockpiles not only occupy soil (forest) land resources, but also seriously pollute water and soil environment, bringing huge safety hazards. With the development of science and technology and the proposal of circular economy in my country's mining industry, a large number of tailings that have been shelved for a long time, especially iron tailings, are reclaimed and ret...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K3/36C08K3/22C08L9/06C08L11/00C08L23/16C08L9/02C08L7/00
CPCC08K9/06C08K3/36C08K3/22C08K2003/2272C08K2003/2206C08K2003/222C08K2003/2227C08K2003/2241C08L9/06C08L11/00C08L23/16C08L9/02C08L7/00Y02W30/91
Inventor 汤庆国刘倩苏志远赵威威梁聪梁金生
Owner HEBEI UNIV OF TECH
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