Method for refined purifying diatomite from diatomaceous clay in Miyi County of Sichuan Province

A technology of diatomite and diatomaceous matter, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of poor diatom pore structure, difficult sorting, and small pore volume.

Active Publication Date: 2011-09-28
SICHUAN HONGHUI TECH
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  • Claims
  • Application Information

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Problems solved by technology

Sorting is extremely difficult; iron in diatomite mostly exists in the form of ferrous iron in the mineral lattice, so it is very difficult to remove iron and purify; (6) diatom pore structure characteristics are not good, bulk density is large, and pore volume is small

Method used

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  • Method for refined purifying diatomite from diatomaceous clay in Miyi County of Sichuan Province
  • Method for refined purifying diatomite from diatomaceous clay in Miyi County of Sichuan Province
  • Method for refined purifying diatomite from diatomaceous clay in Miyi County of Sichuan Province

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Embodiment

[0015] Grind Sichuan Miyi diatomaceous clay to about 60 meshes, 1000 grams of diatomite clay, water dispersion mass percentage solid: liquid = 1: 4, add 75 grams of pentasodium with a system mass ratio of 1.5% as an activated dispersant, Stir and wash for 20 minutes; dilute to mass percentage solid: liquid = 1:8, hydraulically classify the 5-45 μm slurry, put the 5-45 μm slurry mass percentage solid: liquid = 1:5 into the ultrasonic cleaning tank, 50HZ ultrasonic water treatment for 15 minutes , adjust the Ph value to 7.2, filter and classify; squeeze or dry the system to get SiO 2 Diatomaceous earth concentrate with a mass greater than 80%, volume average particle size of 9-11μm, and whiteness of 75%; SiO 2 100 grams of diatomite concentrate with a mass greater than 80% is laid flat and put into the calciner in layers, the heating rate is 5°C / min, the calcining temperature is 700°C, the heat preservation is 1 hour, the temperature is lowered to 100°C, and the material is disc...

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Abstract

The invention discloses a method for refined purifying diatomite from diatomaceous clay in Miyi County of Sichuan Province. According to the present invention, diatomaceous clay in Miyi County of Sichuan Province is adopted as a raw material. The method comprises: adding a dispersant; carrying out hydraulic classification and ultrasonic cleaning to prepare a diatomite concentrate containing more than 80% by mass of SiO2; further carrying out low temperature calcination at a temperature of 650-700 DEG C; carrying out a acidification to prepare a refined diatomite concentrate containing more than 90% by mass of the SiO2. Because diatom of the diatomaceous clay in Miyi County of Sichuan Province is small, and adhering clay particles are weeny (average particle diameter is about 2 [mu]m), the diatom and the adhering clay thereof can be effectively separated through crushing, activating dispersant processing, ultrasonic water processing, calcining and acidifying. With the present invention, the mass percentage of the SiO2 of the diatomite is improved; impurity content is reduced; pollution-free technology requirement is reached; and resources rational utilization is guaranteed.

Description

technical field [0001] The invention relates to a method for finely purifying diatomite in Sichuan Miyi diatomaceous clay. Especially SiO 2 A method for preparing fine diatomite concentrate whose mass is greater than 80-90%. Background technique [0002] Diatomite resources in Sichuan are mainly concentrated in Miyi County, including Huihangou, Xinmin Village and Shaba deposits. All are continental lacustrine deposits, formed in the Neogene. The ore-bearing formation is the Xigeda Formation, and the main ores are diatomite rock and diatom-containing clay rock. Miyi diatomaceous earth has the following characteristics: (1) The species of diatoms are good, mainly sieve algae and small garden algae, followed by straight-chain algae, diatom bodies are 3-40 μm, and the diatom pores are uniform; (2) ) ore SiO 2 The content is low, and it is SiO in diatomite that has been found in China. 2 One of the ores with the lowest content, between 55%-60%; (3) Fe 2 o 3 and Al 2 o 3...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 陈南春曾彧王文辉王荣贵
Owner SICHUAN HONGHUI TECH
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