CN103382122B - Ceramic filter core with loess as base material and preparation method thereof - Google Patents

Abstract

The invention provides a ceramic filter core with loess as a base material. The ceramic filter core is prepared from the following raw materials by weight: 50 to 60 parts of modified loess, 20 to 30 parts of meerschaum powder, 10 to 15 parts of bentonite, 1 to 2 parts of zinc oxide, 2 to 4 parts of magnesium oxide, 15 to 20 parts of aluminum powder, 8 to 10 parts of nanometer silica, 5 to 6 parts of ammonium bicarbonate, 4 to 6 parts of fluorite powder, 5 to 6 parts of mica powder, 0.5 to 1.0 part of ethylene bis(stearamide), 5 to 6 parts of an acrylic emulsion and 0.2 to 0.4 part of fatty glyceride. A preparation method for the filter core comprises the following steps: step-by-step ball milling and mixing of the raw materials; slip casting; molding; and sintering. According to the invention, loess is used as a base material and is modified, so dispersibility is improved, porosity is enhanced, the proportion of micropores is increased, the micropores are uniformly distributed, filtration efficiency is improved, the resource of loess is rich, raw materials are easily available and cheap, cost is reduced, and porosity is as high as 55 to 65%.

Description

A kind of take loess as ceramic element of base-material and preparation method thereof

Technical field

The present invention relates to filter core manufacture field, being specifically related to a kind of take loess as ceramic element of base-material and preparation method thereof.

Background technology

Along with the development of society, the reinforcement of environmental consciousness, the quality criteria requirements of people to drinking water is more and more higher, needs less filtering accuracy, requires the clean-up effect with sterilization and anticorrosion simultaneously, needs the filter core designing different-effect, satisfy the demand.

Summary of the invention

The invention provides a kind of take loess as ceramic element of base-material and preparation method thereof.

The present invention adopts following technical scheme:

Take loess as a ceramic element for base-material, it is characterized in that, be prepared from by the raw material of following weight portion:

Modified Loess 50-60, sepiolite powder 20-30, bentonite 10-15, zinc oxide 1-2, magnesia 2-4, aluminium powder 15-20, nano silicon 8-10, carbonic hydroammonium 5-6, fluorite powder 4-6, mica powder 5-6, ethylene bis stearic acid amide 05-1.0, acrylic emulsion 5-6, fatty glyceride 0.2-0.4

The preparation method of described modified Loess is:

First loess is dropped in baking oven, 100-120 DEG C of drying, 2-3 hour, 6% is less than to water content, then take out and add loess weight 1-2% carboxymethyl cellulose, 2-3% lauryl sodium sulfate, 5-6% aluminium oxide, under the rotating speed of 1200-1400rpm, 70-80 DEG C, high-speed stirring, 2-3 hour, dry, pulverize, cross 100 sieves, obtain modified Loess.

The preparation method of described with loess the is ceramic element of base-material, is characterized in that, comprise the following steps:

(1) acrylic emulsion is joined in container, add distilled water, at 55-60 DEG C, fully dissolve, be then poured in ball grinder, add nano silicon, zinc oxide, magnesia by formula rate, with 90-100rpm rotating speed, ball milling 4-5 hour;

(2) formula rest materials is joined in ball grinder, use 95-120rpm rotating speed, ball milling 3-4 hour;

(3) slurry after ball milling is placed in vacuum and removes bubble;

(4) by the slurry after removing bubble, leave standstill slaking 8-9 hour, then slowly pour in the die cavity of plaster mold shaping, obtain hollow filter core base substrate; Leave standstill 2-3 hour, the demoulding, obtains filter core green compact;

(6) by green compact at 90-120 DEG C of dry 20-22 hour, then under inert gas shielding, first heat up with the speed of 1-1.5 DEG C/min, when temperature is raised to 900 DEG C, be incubated 1 hour; Heat up with the speed of 2 DEG C/min again, when temperature is raised to 1000 DEG C, be incubated 2 hours; Heat up with the speed of 2.5 DEG C/min again, when temperature is raised to 1200 DEG C, be incubated 1 hour, then stop heating, with stove cool to room temperature.

Beneficial effect:

Filter core of the present invention take loess as base-material, by loess modification, improve dispersiveness, add porosity, the ratio of minute aperture is increased, and be evenly distributed, improve filter efficiency, and loess resource enriches, raw material is easy to get, with low cost, reduce cost, loess itself has antibacterial, anti-radiation effect; Withstand voltage, the corrosion resistance and good of ceramic element of the present invention, high temperature resistant, anti-corrosion effects good, porosity is up to 55%-65%.

Detailed description of the invention

Take loess as a ceramic element for base-material, be prepared from by the raw material of following weight (kg):

Modified Loess 60, sepiolite powder 25, bentonite 12, zinc oxide 2, magnesia 3, aluminium powder 18, nano silicon 9, carbonic hydroammonium 6, fluorite powder 5, mica powder 5, ethylene bis stearic acid amide 1.0, acrylic emulsion 6, fatty glyceride 0.4,

The preparation method of described modified Loess is:

First loess is dropped in baking oven, 110 DEG C of dryings, 2 hours, be less than 6% to water content, then take out and add loess weight 2% carboxymethyl cellulose, 3% lauryl sodium sulfate, 5% aluminium oxide, under the rotating speed of 1400rpm, 75 DEG C, high-speed stirring 3 hours, dry, pulverize, cross 100 sieves, obtain modified Loess.

Take loess as the preparation method of the ceramic element of base-material, comprise the following steps:

(1) acrylic emulsion is joined in container, add distilled water, at 60 DEG C, fully dissolve, be then poured in ball grinder, add nano silicon, zinc oxide, magnesia by formula rate, with 100rpm rotating speed, ball milling 4 hours;

(2) formula rest materials is joined in ball grinder, use 120rpm rotating speed, ball milling 3 hours;

(3) slurry after ball milling is placed in vacuum and removes bubble;

(4) by the slurry after removing bubble, leave standstill slaking 8 hours, then slowly pour in the die cavity of plaster mold shaping, obtain hollow filter core base substrate; Leave standstill 3 hours, the demoulding, obtains filter core green compact;

(5) by green compact 110 DEG C of dryings 20 hours, then under inert gas shielding, first heat up with the speed of 1 DEG C/min, when temperature is raised to 900 DEG C, be incubated 1 hour; Heat up with the speed of 2 DEG C/min again, when temperature is raised to 1000 DEG C, be incubated 2 hours; Heat up with the speed of 2.5 DEG C/min again, when temperature is raised to 1200 DEG C, be incubated 1 hour, then stop heating, with stove cool to room temperature.

The obtained filter core aperture of the present embodiment at 2 μm-18 μm, the porosity 60%, rate of filtration 19-25ml/hr.cm ²(height of water 200mm), rupture strength about 12.0Mpa.

Claims (1)

1. be a ceramic element for base-material with loess, it is characterized in that, be prepared from by the raw material of following weight portion:

Modified Loess 50-60, sepiolite powder 20-30, bentonite 10-15, zinc oxide 1-2, magnesia 2-4, aluminium powder 15-20, nano silicon 8-10, carbonic hydroammonium 5-6, fluorite powder 4-6, mica powder 5-6, ethylene bis stearic acid amide 05-1.0, acrylic emulsion 5-6, fatty glyceride 0.2-0.4;

The preparation method of described modified Loess is:

First loess is dropped in baking oven, 100-120 DEG C of drying, 2-3 hour, 6% is less than to water content, then take out and add loess weight 1-2% carboxymethyl cellulose, 2-3% lauryl sodium sulfate, 5-6% aluminium oxide, under the rotating speed of 1200-1400rpm, 70-80 DEG C, high-speed stirring, 2-3 hour, dry, pulverize, cross 100 sieves, obtain modified Loess;

The preparation method of described with loess the is ceramic element of base-material, comprises the following steps:

(1) acrylic emulsion is joined in container, add distilled water, at 55-60 DEG C, fully dissolve, be then poured in ball grinder, add nano silicon, zinc oxide, magnesia by formula rate, with 90-100rpm rotating speed, ball milling 4-5 hour;

(2) formula rest materials is joined in ball grinder, use 95-120rpm rotating speed, ball milling 3-4 hour;

(3) slurry after ball milling is placed in vacuum and removes bubble;

(4) by the slurry after removing bubble, leave standstill slaking 8-9 hour, then slowly pour in the die cavity of plaster mold shaping, obtain hollow filter core base substrate; Leave standstill 2-3 hour, the demoulding, obtains filter core green compact;

(6) by green compact at 90-120 DEG C of dry 20-22 hour, then under inert gas shielding, first heat up with the speed of 1-1.5 DEG C/min, when temperature is raised to 900 DEG C, be incubated 1 hour; Heat up with the speed of 2 DEG C/min again, when temperature is raised to 1000 DEG C, be incubated 2 hours; Heat up with the speed of 2.5 DEG C/min again, when temperature is raised to 1200 DEG C, be incubated 1 hour, then stop heating, with stove cool to room temperature.