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Method for preparing light building material ceramic particle by utilizing slate sawn mud

A technology for building materials such as pottery and slate, which is applied in applications, ceramic products, household appliances, etc., can solve the problems of uneven particle size, poor plasticity, and difficulty in utilization, and achieve low production costs, simplified production processes, and compact packaging. The effect of increasing the compressive strength

Inactive Publication Date: 2012-11-28
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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 light building material ceramic particle by utilizing slate sawn 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] SiO 2

al 2 o 3

CaO

MgO

K 2 O+NaO

Fe 2 o 3

FeO

57.30

18.90

0.65

0.60

3.85

0.80

7.50

SO 2

C

MnO

P 2 o 5

LOSS

0.20

2.80

0.15

0.95

6.30

[0020] The ratio of raw materials is (mass percentage): 70% of slate saw mud (moisture content 30% ± 2%), 30% of slate dry powder, and 1.5% sodium silicate binder (mixed in ball forming solution in water).

[0021] The slate sawing mud is muddy at the beginning due to its high water content, and becomes a large mud mass after the surface is air-dried. It needs to be mixed with slate powder (particles smaller than 1mm from crushed slate) in a twin-shaft mixer Stir to form loose particles, and then enter the ball fo...

Embodiment 2

[0026] The ratio of raw materials is: 65% of slate saw mud (water content 30%±2%), 35% of slate powder, and 1.5% of sodium silicate binder.

[0027] The raw materials are mixed and stirred in a test mixer to become granular, and the balls of ф5-20mm are made in a drum granulator, and the balls are put into a corundum crucible, put into a high-temperature furnace, dried and pre-fired at 300°C for 10 minutes, and then placed Put it into a silicon carbide rod high-temperature furnace for calcination at 1150°C for 30 minutes, then take it out of the furnace and cool to room temperature.

Embodiment 3

[0029] The ratio of raw materials is: 100% slate saw mud (water content 15% ± 1%), and 1.5% sodium silicate binder is added outside.

[0030] The slate sawing mud is made into ф5-20mm balls in a drum granulator, put the balls into a corundum crucible, put them in a high-temperature furnace, dry and pre-fire at 300°C for 10 minutes, and then put them into a silicon carbide rod high-temperature furnace Calcined at 1150°C for 30 minutes, then cooled to room temperature.

[0031] The product part performance technical index of embodiment 2-3 is shown in Table 4.

[0032] Table 4 Some performance indicators of different example products

[0033]

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Abstract

The invention relates to a method for preparing light building material ceramic particle by utilizing slate sawn mud. The product formula includes: 60-100% of slate sawn mud (containing 30% of moisture) and 0-40% of slate dry powder; and 1-2% of sodium silicate binder is additionally doped. The manufacturing processing step includes that the slate sawn mud is filtered until moisture is less than 30%, the slate sawn mud and powder material obtained by sieving crushed slate are pre-stirred into bulk particles in a dual spindle stirring machine, so as to form cue ball, when the moisture contained in the slate sawn mud is less than 15%, the slate sawn mud also can be independently stirred and broken into particles in the stirring machine, then the cue ball is fed into a ball forming mill to be sprayed with mist water, and a small amount of binder is added, so that the particle forms a spherical particle with the diameter Phi of 5-30mm by rolling, then the material ball is fed into a rotary kiln to be calcined, the calcining temperature is 1100-1200 DEG C, and calcining time is 25-40min, and the fiery material ball taken out from the kiln is cooled by adopting a monocular cooling machine. The method has simple production technology and low cost, and the prepared slate sawn mud ceramic particle has high tube pressure strength and wide application.

Description

technical field [0001] The invention belongs to the technical field of building energy-saving materials and environmental materials, and relates to a method for preparing lightweight building material ceramsite by using solid waste-slate processing saw mud. Background technique [0002] Xingzi County, Jiangxi Province is rich in slate resources, with 200 million cubic meters of slate reserves, and there are more than 600 large and small slate processing enterprises in the area under its jurisdiction. For a long time, millions of tons of slate waste and processing sawing mud have accumulated within a few kilometers around the slate mining area in the jurisdiction. These solid wastes not only occupy a large amount of land and farmland, but also cause serious pollution to the environment in the area. In particular, some of the mud discharged by hundreds of slate processing enterprises overflowed into the farmland in the area, acidifying the soil and seriously affecting the grow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00B09B3/00
Inventor 黄少文
Owner NANCHANG UNIV
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