Preparation method of fine diatomite

Abstract

The invention discloses a preparation method of fine diatomite. According to the invention, method replacement and step dispersion are carried out on the most time-consuming delamination and purification procedures in the production process, the purification procedure adopts a mixed method, a scrubbing procedure is refined, and by means of coarse crushing, fine crushing and grading, original soil can be finely crushed into tiny particles, and at the same time a lot of impurities are removed in advance, thus greatly saving the consumption of water and time at the earlier stage of scrubbing, then dispersion and chemical acid leaching are carried out, in the layering procedure, a centrifuge is employed for centrifugal separation, and a lot of impurities are removed in advance in the earlier grading process, so that the efficiency of the layering procedure is also improved effectively. According to the method, the procedures are broken down, and an optimal production method is adopted directed at the characteristics of each step, although the upfront investment is increased to certain extent, the later production efficiency is obviously improved, and the fineness of fine diatomite is guaranteed.

Description

technical field [0001] The invention relates to a production process, in particular to a preparation method of refined diatomite. Background technique [0002] Diatomaceous earth is a kind of siliceous rock, mainly distributed in China, the United States, Japan, Denmark, France, Romania and other countries. It is a biogenic siliceous sedimentary rock composed mainly of the remains of ancient diatoms. Its chemical composition is mainly SiO2, which can be expressed by SiO2 nH2O. The mineral composition is opal and its variants; the chemical composition of diatomite is mainly SiO2, containing a small amount of Al2O3, Fe2O3, CaO, MgO, etc. and organic matter. Diatomite is At present, it is an important raw material of diatom mud for home decoration and building materials. [0003] Natural diatomite cannot be used directly because of its high impurity content, and it needs to be refined and purified. At present, the main process of refining diatomite includes layering and purif...

AI Technical Summary

Problems solved by technology

[0003] Natural diatomite cannot be used directly because of its high impurity content, and it needs to be refined and purified. At present, the main process of refining diatomite includes layering and purification (including scrubbing, acid leaching, and comprehensive methods); layering directly Regarding the removal of impurities in diatomite, the sedimentation method in the sedimentation tank is mostly used at present, which generally takes a long time; the scrubbing method in the purification has low cost and less investment, but the effect is poor. The effect of the acid leaching method is not large, but it also takes a long time, and the cost is high and the pollution is serious. Therefore, at present, the comprehensive method is often used for purification, that is, the scrubbing method and the acid leaching method are combined. The premise of the scrubbing method is The raw material particles are crushed by scrubbing, and the clay and other mineral impurities consolidated on the diatom frustule are separated as far as possible. The current production is initially scrubbing it, and the raw ore is crushed and fined by scrubbing, so that the diatoms in the raw ore The soil is separated. This step requires a lot of water resources and takes a long time. In general, several steps in the current production process have seriously affected the overall production efficiency. Today, with the increasing demand for diatom mud, The production factor has seriously affected the supply and selling price of diatom mud