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Method for preparing porous ceramsite filter material from slate saw mud

A technology of porous pottery and slate, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems of poor plasticity, difficulty in utilization, uneven particle size, etc., and achieve low wear rate and uniform porosity , The effect of low production cost

Inactive Publication Date: 2011-05-25
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Slate processing sawing mud is the mud left after mixing with coolant during slate cutting, with a water content of more than 40%, uneven particle size and poor plasticity, so it is difficult to use

Method used

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  • Method for preparing porous ceramsite filter material from slate saw mud
  • Method for preparing porous ceramsite filter material from slate saw mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The chemical composition of the used slate saw mud (dried) is shown in Table 2.

[0018] The chemical composition (%) of table 2 slate saw mud

[0019] SiO2

Al2O3

CaO

MgO

K2O+NaO

Fe2O3

FeO

57.30

18.90

0.65

0.60

3.85

0.80

7.50

SO2

C

MnO

P2O5

LOSS

0.20

2.80

0.15

0.95

6.30

[0020] The ratio of raw materials is (mass percentage): 60% of slate saw mud (dry base), 30% of slate dry powder, and 10% of diatomite.

[0021] Preparation Process:

[0022] (1) Spray slate saw mud, dry slate powder and diatomaceous earth into a twin-shaft mixer to make cue balls of φ1-1.5mm;

[0023] (2) The cue ball is rolled into a spherical particle of φ3-8mm in the sprayed water in the granulator;

[0024] (3) The pellets are fed into the pre-calcination section of the rotary kiln and pre-fired at 200-500°C for 10 minutes, and then enter the firing z...

Embodiment 2

[0030] The ratio of raw materials is: slate saw mud (dry base) 70%, slate dry powder 25%, diatomaceous earth 5%.

[0031] Technological process is the same with embodiment 1.

Embodiment 3

[0033] The ratio of raw materials is: slate saw mud (dry base) 65%, slate dry powder 28%, diatomite 7%.

[0034] Technological process is the same with embodiment 1.

[0035] Some performance technical indicators of the products of Examples 2-3 are shown in Table 3.

[0036] Table 3 Some performance indicators of different example products

[0037]

[0038] *Take 10 φ8mm±1mm material balls to measure the compressive strength on the electronic universal testing machine, and take the average value.

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Abstract

The invention discloses a method for preparing a porous ceramsite filter material from slate saw mud. According to a formula, a product prepared by the method comprises the following raw materials in percentage by mass: 60 to 80 percent of slate saw mud (a dry basis), 15 to 30 percent of dry slate powder and 5 to 10 percent of kieselguhr, wherein the raw materials are mixed and stirred into spherical particles, then calcined and cooled to obtain the product. The method has the advantages of simple process and low production cost, and has great significance to resource cycling and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of solid waste utilization and waste water purification treatment materials, and relates to a method for preparing porous ceramsite filter material by processing saw mud from slate. Background technique [0002] Since the mid-1990s, biological aerated filter sewage treatment process has been widely used in our country. Most of the fillers used use clay as the main raw material and are sintered into spherical filter materials. For example, the spherical lightweight ceramsite (see patent 02112755.7) developed by Huaye Automation Engineering Company of Anhui University of Technology with clay, steelmaking red mud and fly ash as raw materials, Quanxing Chemical Packing Co., Ltd. and Xin'an Industry Co., Ltd. in Pingxiang, Jiangxi The spherical ceramsite filter materials produced by the responsible company, Futong Chemical Packing Co., Ltd. and other enterprises use clay (generally more than 40%) and pottery cla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/06
Inventor 黄少文刘阳杰
Owner NANCHANG UNIV
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