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

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

Inactive Publication Date: 2010-10-06
NANCHANG UNIV
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  • 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, wit

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

Example Embodiment

[0016] Example 1:

[0017] The chemical composition of the used slate sawdust (drying) is shown in Table 2.

[0018] Table 2 Chemical composition of slate sawdust (%)

[0019] SiO 2

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

[0021] Slate saw 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 after slate crushing and screening) in a double-shaft mixer. Stir to form loose granules, and then enter the pelletizing machine to make pellets of ф5-30mm. The finished pellets are fed into the rotary kiln for calcination. The calcination temperature was controlled to 1180°C, and the calcination time was 35 minutes. The product is obtained after the ceramsite exiting the kiln is cooled b...

Example Embodiment

[0025] Example 2:

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

[0027] The raw materials are mixed and stirred in a test mixer to form granules, and pellets of ф5-20mm are made in a drum granulator. The pellets are put into a corundum crucible and placed in a high-temperature furnace for drying and pre-burning at 300°C for 10 minutes. Into the silicon carbon rod high temperature furnace, calcined at 1150 ℃ for 30 minutes, and cooled to room temperature.

Example Embodiment

[0028] Example 3:

[0029] The ratio of raw materials is: 100% slate sawdust (water content 15%±1%), mixed with 1.5% sodium silicate binder.

[0030] The slate saw mud is made into pellets of ф5-20mm in a drum granulator, and the pellets are put into a corundum crucible and placed in a high-temperature furnace for drying and pre-burning at 300°C for 10 minutes, and then placed in a high-temperature furnace for silicon carbide rods. It was calcined at 1150°C for 30 minutes and cooled to room temperature.

[0031] The product part performance technical indexes of embodiment 2-3 are 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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IPC IPC(8): C04B38/00B09B3/00
Inventor 黄少文
Owner NANCHANG UNIV
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