CN1155515C

CN1155515C - Process for preparing granular pentonite

Info

Publication number: CN1155515C
Application number: CNB021088551A
Authority: CN
Inventors: 张兴华; 张东华
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-16
Filing date: 2002-04-16
Publication date: 2004-06-30
Anticipated expiration: 2022-04-16
Also published as: CN1382628A

Abstract

The present invention discloses a method for producing granular bentonite, which comprises: white bentonite is dried or aired, 0.02 to 0.05 portion by weight of sodium carbonate is added into every portion by weight of white bentonite, and the mixture is put into a Raymond machine to be pulverized into 100 to 200 meshes of soil powder; 0.03 to 0.06 portion of sodium silicate liquid and 0.3 to 0.6 portion of water are added, and the mixture is uniformly stirred and is pressed into cakes by an extrusion double-roller machine, and the cakes are dried in a dryer to make water content smaller than or equal to 10% and then are sieved; granules with diameters between 0.8 and 4mm are packaged. The method is a novel producing method and adopts a novel formula. The granular bentonite produced by the method has the advantages of favorable water absorption, virgin whiteness, high strength, favorable caking capacity, few impurities and low ash content and can be used as cat sand as well as water preventive and seepage preventive material.

Description

Process for preparing granular pentonite

Technical field

The present invention relates to a kind of process for preparing granular pentonite.

Background technology

Because the wilkinite water-absorbent is better relatively, thus be widely used in the construction work, but these bentonitic color and lusters are relatively poor, and impurity is more.

Summary of the invention

The object of the present invention is to provide a kind of technology simple, the process for preparing granular pentonite that cost is relatively low, the particle wilkinite water-absorbent of producing with this method is strong, and color and luster is pure white, and intensity is good, and impurity is few.

The objective of the invention is to be achieved through the following technical solutions:

A kind of process for preparing granular pentonite, its production stage is: select white wilkinite to dry or dry, the yellow soda ash that adds 0.02-0.05 part by weight in every part of white wilkinite, putting into Raymond machine pulverizes, be ground into 0.15 millimeter-0.074 millimeter native powder, the sodium silicate liquid that adds 0.03-0.06 part again, add 0.3-0.6 part water, stir, be pressed into cake with the extruding twin rollers, enter the drying machine oven dry, make weight percent≤10% of moisture content, sieve then, the granule packaging of 0.8mm-4mm is got final product.

Physicals of the present invention is as follows: water-intake rate 〉=500%, expand 〉=15, pH value 〉=7, particle diameter 0.5-1.5mm, green compression strength＞130, moisture content≤10%, high proportion 0.6-0.82, ash≤190.

Advantage of the present invention is: the present invention is a kind of new production method, and adopts new prescription, and with the particle wilkinite good water absorption that the present invention produces, color and luster is pure white, intensity is hard, and the caking performance is good, and impurity is few, ash is low, can be used as cat litter and use, and also can be used as waterproof, impervious material.

Embodiment

Below in conjunction with concrete embodiment, the present invention is described in further detail.

A kind of process for preparing granular pentonite, its production stage is: select the oven dry of white wilkinite or dry, add 0.03 part yellow soda ash by weight in every part of white wilkinite, putting into Raymond machine pulverizes, be ground into 0.112 millimeter native powder, add 0.04 part sodium silicate liquid again, add 0.4 part of water, stir, be pressed into cake with the extruding twin rollers, enter the drying machine oven dry, make weight percent≤10% of moisture content, sieve then, the granule packaging of 0.8mm-4mm is got final product.

Claims

1, a kind of process for preparing granular pentonite is characterized in that: the bentonitic production stage of particle is:

Select white wilkinite to dry or dry, add the yellow soda ash of 0.02-0.05 part by weight in every part of white wilkinite, put into Raymond machine and pulverize, be ground into 0.15 millimeter-0.074 millimeter native powder, the sodium silicate liquid that adds 0.03-0.06 part again, add 0.3-0.6 part water, stir, be pressed into cake with the extruding twin rollers, enter the drying machine oven dry, make weight percent≤10% of moisture content, sieve then, the granule packaging of 0.8mm-4mm is got final product.

2, process for preparing granular pentonite according to claim 1 is characterized in that: production stage is:

Select white wilkinite to dry or dry, the yellow soda ash that adds 0.03 part by weight in every part of white wilkinite is put into Raymond machine and is pulverized, and is ground into 0.112 millimeter native powder, the sodium silicate liquid that adds 0.04 part again, add 0.4 part of water, stir, be pressed into cake with the extruding twin rollers, enter the drying machine oven dry, make weight percent≤10% of moisture content, sieve then, the granule packaging of 0.8mm-4mm is got final product.