Preparation method of kaolin for high-performance honeycomb ceramic

A technology of honeycomb ceramics and kaolin, which is applied in the field of preparation of kaolin mineral raw materials for high-performance honeycomb ceramics, and can solve the problems of poor main performance and the like

Active Publication Date: 2013-06-12
中国高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a preparation method of high-performance kaolin for honeycomb ceramics, which solves the problem that the main properties of kaolin for honeycomb ceramics are poor at present

Method used

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  • Preparation method of kaolin for high-performance honeycomb ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: A preparation method of kaolin for high-performance honeycomb ceramics

[0046] see figure 1 As shown, it consists of the following steps in turn:

[0047] first step, broken

[0048] Select kaolin raw ore as raw material and crush it, wherein the kaolin raw ore contains Fe 2 o 3 The mass percentage is 0.5~2%, containing K 2 O and Na 2 The sum of the mass percentages of O is 0.5~1.5%;

[0049] The second step, mashing

[0050] For the raw kaolin ore broken in the first step, put it into the mashing tank, add water and stir it mechanically until the raw kaolin ore is mashed into a slurry;

[0051] The third step, selective flocculation

[0052] The ore slurry in the second step is pumped into the three-stage cyclone for selective flocculation. First, the first-stage cyclone with a diameter of 200mm is used for flocculation, and the first selection is obtained from the overflow port of the cyclone. After that, the ore pulp is flocculated by the second-...

Embodiment 2

[0067] Example 2: A preparation method of kaolin for high-performance honeycomb ceramics

[0068] Consists of the following steps in turn:

[0069] first step, broken

[0070] Select kaolin minerals as raw materials and crush them, wherein the kaolin minerals contain Fe 2 o 3 The mass percentage is 0.5~2%, containing K 2 O and Na 2 The sum of the mass percentages of O is 0.5~1.5%;

[0071] The second step, mashing

[0072] For the crushed kaolin minerals in the first step, put them into the mashing pool, add water and mechanically stir until the kaolin minerals are mashed into pulp;

[0073] The third step, selective flocculation

[0074]The ore slurry in the second step is pumped into the secondary cyclone for selective flocculation. Firstly, the first-stage cyclone with a diameter of 150mm is used for flocculation, and the first selective flocculation is obtained from the overflow port of the cyclone. The final pulp; then use the second-stage cyclone with a diameter ...

Embodiment 3

[0089] Example 3: A preparation method of kaolin for high-performance honeycomb ceramics

[0090] Consists of the following steps in turn:

[0091] first step, broken

[0092] Select kaolin raw ore as raw material and crush it, wherein the kaolin raw ore contains Fe 2 o 3 The mass percentage is 0.5~2%, containing K 2 O and Na 2 The sum of the mass percentages of O is 0.5~1.5%;

[0093] The second step, mashing

[0094] For the crushed kaolin minerals in the first step, put them into the mashing pool, add water and mechanically stir until the kaolin minerals are mashed into pulp;

[0095] The third step, selective flocculation

[0096] The ore slurry in the second step is pumped into a primary cyclone with a diameter of 75mm for selective flocculation, and the selected ore slurry is obtained from the overflow port of the cyclone;

[0097] The fourth step, settling

[0098] The pulp selected in the third step enters the settling tank for sedimentation, and the mass conc...

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Abstract

The invention relates to a preparation method of kaolin for high-performance honeycomb ceramic, which is characterized by sequentially comprising the following steps: crushing; pulping; selectively flocculating; settling, controlling the mass concentration of the ore pulp at 12-18%, adding water glass of which the mass concentration is 7-13% and sodium hexametaphosphate, measuring the temperature and liquid level of the ore pulp in a settling basin, calculating the settling time according to a simplified empirical formula t=Tn*h/d2 based on the Stokes law (wherein d in the simplified formula represents the granule size of granules and is valued at 3), and standing at the settling time, wherein after standing, the granule size of granules of the underlayer ore pulp is more than 3 micrometers, and the granule size of granules of the supernatant ore pulp is less than 3 micrometers; and performing vacuum filtration, drying, and granulating to ensure that the mass percent of Fe2O3 contained in the kaolin product is less than or equal to 0.20%, the sum of the mass percents of contained K2O and Na2O is less than or equal to 0.4%, the content of granules of which the granularity is less than 2 micrometers is more than or equal to 91% and the bulk density is 0.30-0.36g/cm<3>. Thus, the invention satisfies application in high-performance honeycomb ceramic industry.

Description

technical field [0001] The invention relates to the field of preparation of kaolin mineral raw materials for high-performance honeycomb ceramics, in particular to a preparation method of kaolin for high-performance honeycomb ceramics. Background technique [0002] Kaolin is a clay mineral composed of a special silicon-aluminum crystal structure. Kaolin, which has been deeply processed and modified, is a necessary raw material for the high-performance honeycomb ceramics industry. It has received extensive attention from the honeycomb ceramics industry and has become a key raw material for the preparation of high-performance honeycomb ceramics. [0003] Honeycomb ceramics is a new type of ceramic product with a honeycomb-like structure developed in the past 30 years. From the earliest application in small automobile exhaust purification to today's wide application in chemical industry, electric power, metallurgy, petroleum, electronic appliances, machinery and other industrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/04
Inventor 邓毅超陈丽昆张忠飞冯杰李青蒋国明石晓岚王炜陈华林江卫忠杨洪军
Owner 中国高岭土有限公司
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