Method for preparing granular artificial pumices by taking illite-chlorite slates as raw material

Abstract

The invention relates to a method for preparing granular artificial pumices by taking illite-chlorite slates as a raw material. In the method, illite-chlorite slates are taken as ore raw materials, and no other reagent is added; and the method comprises the following steps: 1, crushing ore raw materials into ores with a particle size of -20 mm by using a crushing device; 2, sieving the crushed ores by using a sieving device so as to obtain a material with a particle size of 3-20 mm; 3, in an air environment, heating the sieved material to 240-800 DEG C at a heating speed of 10-20 DEG C / min by using a calcining-heating device, and carrying out heat preservation for 12-30 min; 4, in an air environment, heating the material subjected to preheating and heat preservation to 1150-1300 DEG C at a heating speed of 10-20 DEG C / min, and carrying out heat preservation for 15-30 min; 5, in an air environment, slowly cooling the calcined and puffed material to below 400 DEG C; and 6, by using the sieving device, sieving the calcined, puffed and cooled material so as to obtain a material with a particle size of 5-25 mm, so that a granular artificial pumice is obtained. The method is good in safety, simple in process, easy to popularize and apply and wide in application, has an obvious effect, and has remarkable social and economic benefits.

Description

technical field [0001] The invention relates to a method for preparing artificial pumice, in particular to a method for preparing granular artificial pumice using illite chlorite slate as raw material, using natural illite chlorite slate as raw material without adding any other reagents, and adopting optimized The calcining and puffing process is used to prepare artificial pumice, which is suitable for the processing and preparation of granular artificial pumice using natural illite chlorite slate as raw material. Background technique [0002] Pumice, also known as pumice or pumice, has many pores, light weight, and a bulk density of less than 1000kg / m 3 , named after being able to float on water. Natural pumice is a porous, light glassy acidic volcanic extrusive rock with a bulk density of 450kg / m 3 Its chemical composition is equivalent to that of rhyolitic intermediate-acid volcanic rocks, generally silicates rich in aluminum, potassium, and sodium, that is, SiO 2 A na...

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Problems solved by technology

[0010] The methods for preparing artificial pumice in the prior art, including the above, often need to add a variety of ingredients, the raw materials are not easy to obtain and the cost is high, the preparation steps are also relatively cumbersome, and the quality of the obtained artificial pumice needs to be improved

[0011] On the other hand, illite chlorite slate is a kind of natural ore with a wide distribution, and its application field is relatively narrow at present, and there is no report that illite chlorite slate is used as a raw material for the preparation of artificial pumice

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