Ceramsites prepared from coal gangue and coal slime, and preparation method for ceramsites

A technology of coal gangue and coal slime, which is applied in the field of high-strength ceramsite and its preparation, can solve the problems of insufficient strength of ceramsite, and achieve the effects of light bulk density, saving water resources, and low water absorption

Active Publication Date: 2015-01-21
柳州紫荆生态工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the comprehensive utilization of coal gangue and coal slime, and the problem of insufficient strength of ceramsite, provide a kind of ceramsite using coal gangue and coal slime as raw materials and its preparation method, and utilize the present invention to make full use of coal gangue Combined with the mineral components and combustible components in the coal slime, and the moisture in the coal slime, it is made of high-strength ceramsite with a non-porous surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The selected weight ratio formula is as follows: coal gangue 60%, quartz sand 5%, feldspar 10%, coal slime 25% as raw materials, wherein coal gangue contains 62% silicon oxide, 20% aluminum oxide, 1% iron oxide, and The content is 10%, other components are 7%; the silicon oxide in the coal slime is 40%, the aluminum oxide is 13%, the iron oxide is 3%, the loss on ignition is 35%, and the other components are 9%. The raw materials of coal gangue, quartz sand and feldspar were firstly crushed to below 15mm by a crusher, and then crushed by a crusher, and sieved through a 200-mesh sieve, and the materials below 200-mesh were taken as samples for preparation. Then mix the selected materials with coal slime evenly, and make spherical particles with a size of 3-8mm, then put them in an oven at 110°C, dry for 30 minutes, take them out and put them in a muffle furnace, and rise to 450°C in 1 hour ℃, then rise to 1100℃ in 3 hours, keep warm for 20 minutes, and get the finished p...

Embodiment 2

[0025] Select the weight ratio formula as follows, coal gangue 70%, quartz sand 10%, feldspar 5%, coal slime 15% as raw materials, wherein coal gangue contains 70% silicon oxide, 15% aluminum oxide, 4% iron oxide, and The content is 4%, other components are 7%; the silicon oxide in the coal slime is 32%, the aluminum oxide is 8%, the iron oxide is 1%, the loss on ignition is 50%, and the other components are 7%.

[0026] The coal gangue, quartz sand and feldspar were firstly crushed to below 15mm by a crusher, and then crushed by a crusher, and sieved through a 200-mesh sieve, and the materials below 200-mesh were taken as samples for preparation. Mix the selected materials evenly, and make spherical particles with a size of 3-8mm, then put them in an oven at 110°C, dry them for 30 minutes, take them out and put them in a muffle furnace, raise them to 450°C in 1.5 hours, and then use Rise to 1200°C in 2 hours, keep warm for 40 minutes, and get the finished product after coolin...

Embodiment 3

[0028] The selected weight ratio formula is as follows, 80% coal gangue, 5% quartz sand, 5% feldspar, and 10% coal slime are used as raw materials, wherein coal gangue contains 50% silicon oxide, 25% aluminum oxide, and 5% iron oxide. The content is 15%, other components are 5%; the silicon oxide in the coal slime is 22%, the aluminum oxide is 9%, the iron oxide is 2%, the loss on ignition is 60%, and the other components are 7%.

[0029] The coal gangue, quartz sand and feldspar were firstly crushed to below 15mm by a crusher, and then crushed by a crusher, and sieved through a 200-mesh sieve, and the materials below 200-mesh were taken as samples for preparation. Mix the selected materials evenly, and make spherical particles with a size of 3-8mm, then put them in an oven at 110°C, dry for 30 minutes, take them out and put them in a muffle furnace, rise to 450°C in 2 hours, and then use Rise to 1250°C in 3 hours, keep warm for 60 minutes, and get the finished product after c...

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Abstract

The invention discloses ceramsites prepared from coal gangue and coal slime and a preparation method for the ceramsites, and belongs to the technical field of artificial light aggregates. The ceramsites are obtained by roasting a mixture comprising the coal gangue, the coal slime, quartz sands and feldspar. The preparation method for the ceramsites comprising steps of porphyrizing and sieving three raw materials to obtain raw materials whose particle sizes are less than 200 meshes, wherein the three raw materials comprise, by weight, 60% to 80% of the coal gangue, 5% to 10% of the quartz sands and 10% to 20% of the feldspar; mixing the raw materials with the coal slime to obtain the mixture, wherein the weight percentage content of the coal slime is 10% to 30%; balling the mixture; carrying out high temperature roasting to spheres in a muffle furnace after the spheres being dried; and carrying out a cooling treatment to obtain products. The ceramsites are characterized by no aperture on the surface, high strength and uniform size, and can widely used in the field of engineering construction, chemical engineering, etc.

Description

technical field [0001] The invention belongs to the technical field of artificial light aggregates, in particular to a high-strength ceramsite using coal gangue and coal slime as raw materials and a preparation method. Background technique [0002] Ceramsite is a common name for artificial lightweight aggregates. Ceramsite has excellent properties, such as low density, high cylinder compressive strength, high porosity, high softening coefficient, good frost resistance, and excellent alkali-resistant aggregate reactivity. Especially because of its low density, internal porosity, uniform shape and composition, and certain strength and firmness, ceramsite has multifunctional characteristics such as light weight, corrosion resistance, frost resistance, earthquake resistance and good insulation. Ceramsite is widely used in building materials, horticulture, food and beverage, refractory and thermal insulation materials, chemical industry, petroleum and other departments, and its a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B38/00
Inventor 陆广张弦严学军
Owner 柳州紫荆生态工程科技有限公司
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