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Bentonite binder and preparation method thereof

A technology of bentonite and binder, applied in chemical instruments and methods, manufacturing tools, casting and molding equipment, etc., can solve the problems of short ion exchange time, incomplete sodiumization effect, easy blocking of Raymond machine, etc., and achieve shortening Sodiumization time, remarkable energy-saving effect, beneficial to continuous production

Inactive Publication Date: 2011-05-25
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the production of this method, the ion exchange time is too short, and the sodiumization effect is not complete, and under this moisture, the Raymond machine is easy to block, which affects production

Method used

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  • Bentonite binder and preparation method thereof
  • Bentonite binder and preparation method thereof
  • Bentonite binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 adopts the inventive method to prepare bentonite binder

[0043] Grinding 250Kg of bentonite raw ore with a water content of 26% to a particle size of less than 5mm, adding a sodium reagent Na with a mass of 4% bentonite raw ore 2 CO 3 , bentonite raw ore quality 0.5% accelerator hexamethylenetetramine, the total water content of the mixture is adjusted to 45%, rolled in a wheel mill mixer for 40min, dried at 95°C to a water content of 7.6%, and ground to Particle size - 200 mesh and above 98.5% sodium-based bentonite binder. Tested by "GB / T 20973-2007 Bentonite Test Method", the results are shown in Table 1. According to X-ray diffraction analysis, the d(001) value of the montmorillonite decreased from 14.4285A° of the original ore to 12.4536A°, indicating that the calcium-magnesium-based bentonite has been modified into sodium-based bentonite. XRD graph of bentonite raw ore figure 1 Shown, the XRD figure of the bentonite binder prepared by the inventi...

Embodiment 2

[0044] Embodiment 2 adopts the inventive method to prepare bentonite binder

[0045] Grinding 250Kg of bentonite raw ore with a water content of 26% to a particle size of less than 5mm, adding a sodium reagent Na with a mass of 3% bentonite raw ore 2 CO 3 , bentonite raw ore quality 1.0% accelerator hexamethylenetetramine, adjust the total water content of the mixture to 45%, roll in a wheel mill mixer for 30min, dry at 95°C to a water content of 7.8%, and grind to Particle size - 200 mesh and above 98.5% sodium-based bentonite binder. Tested by "GB / T 20973-2007 Bentonite Test Method", the results are shown in Table 2. According to X-ray diffraction analysis, the d(001) value of the montmorillonite decreased from 14.4285A° of the original ore to 12.4254A°, indicating that the calcium-magnesium-based bentonite has been modified into sodium-based bentonite. XRD graph of bentonite raw ore figure 1 Shown, the XRD figure of the bentonite binder prepared by the inventive method ...

Embodiment 3

[0046] Embodiment 3 adopts the inventive method to prepare bentonite binder

[0047] Grinding 250Kg of bentonite raw ore with a water content of 26% to a particle size of less than 5mm, adding a sodium reagent Na with a mass of 4% bentonite raw ore 2 CO 3 , bentonite raw ore quality 1.0% accelerator hexamethylenetetramine, adjust the total water content of the mixture to 45%, roll in a wheel mill mixer for 30min, dry at 95°C to a water content of 7.5%, and grind to Particle size - 200 mesh and above 98.5% sodium-based bentonite binder. Tested by "GB / T 20973-2007 Bentonite Test Method", the results are shown in Table 1. According to X-ray diffraction analysis, the d(001) value of the montmorillonite decreased from 14.4285A° of the original ore to 12.4228A°, indicating that the calcium-magnesium-based bentonite has been modified into sodium-based bentonite. However, the d(001) value of montmorillonite is almost the same as that in Example 2, and has basically reached the mini...

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Abstract

The invention relates to a bentonite binder and a preparation method thereof, belonging to the processing field of bentonite, and aiming at providing a bentonite binder with a better sodiumizing modification effect and a preparation method of the bentonite binder. The preparation method of the bentonite binder comprises the following steps: using bentonite ore as raw material, adding a sodiumizing agent accounting for 2-5wt% of bentonite ore and an accelerator accounting for 0.35-1.2wt% of bentonite ore, wherein the accelerator is at least one of ammonium oxalate, sodium polyacrylate, hexamethylenetetramine and tripolycyanamide; evenly mixing and carrying out sodiumizing modification, drying, smashing to obtain the bentonite binder. In the preparation method, required equipment is simple and is convenient for maintenance, the production efficiency is high, and energy-saving effect is obvious, and the bentonite binder is suitable for continuous production. The bentonite binder of the invention has higher water absorption rate and is a bentonite binder with high adhesive property; and the bonding force of the iron ore concentrate is greatly increased after the bentonite binder is used in the iron ore pelletizing metallurgy industry, thus improving the pelletizing rate of the iron ore concentrate.

Description

technical field [0001] The invention relates to a bentonite binder and a preparation method thereof, belonging to the field of bentonite processing. Background technique [0002] Bentonite, also known as montmorillonite, bentonite, etc., is a layered aluminosilicate with montmorillonite as the main component. It has good properties such as water absorption, cohesion, adsorption, catalytic activity and cation exchange, and is widely used in metallurgy, mechanical casting, drilling, petrochemical industry, light industry, textile, agriculture, forestry, animal husbandry, construction engineering, environmental engineering And other fields, known as "universal clay". At present, the world's annual consumption is about 10 million tons, of which the three major consumption areas of drilling mud, casting and iron ore pellets are the main ones. [0003] Bentonite is a clay mineral mainly composed of montmorillonite minerals. The montmorillonite crystal is composed of two layers o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44C01B33/40B22C1/18C22B1/243
Inventor 舒明勇刘光辉黄双华李玉峰赖奇尹海英
Owner PANZHIHUA UNIV
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