Porous ceramsite made of low-silicon iron tailings and preparation method of porous ceramsite

A technology of porous ceramics and ferrosilicon, which is applied in the field of porous ceramsite from low-silicon iron tailings and its preparation, to achieve the effects of improving compressive strength, uniform strength distribution, and well-developed pores

Active Publication Date: 2012-12-12
武钢资源集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Porous ceramsite made of low-silicon iron tailings and preparation method of porous ceramsite
  • Porous ceramsite made of low-silicon iron tailings and preparation method of porous ceramsite
  • Porous ceramsite made of low-silicon iron tailings and preparation method of porous ceramsite

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Experimental program
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Embodiment 1

[0034] A preparation method for preparing ceramsite by using low-silicon iron tailings powder, comprising the following steps:

[0035] 1) The raw materials for the preparation of the ceramsite weighed 90 parts of low-silicon iron tailings powder, 6 parts of rice husk powder, 2 parts of coal powder, 1 part of limestone powder and 1 part of clay according to the weight ratio, and respectively at 105 ° C After drying for 4 hours, mix evenly to obtain a mixture;

[0036] Among them, the particle size of iron tailings powder is less than 0.45mm, and the particle size of rice husk powder, coal powder and clay is all less than 0.15mm;

[0037] 2) Put the mixture prepared in step 1) into a disc pelletizer to form balls, spray industrial water glass solution with a concentration of 0.5% until the surface of the balls is wetted, and then dry the green balls at 130°C 4h;

[0038] 3) The dried green balls in step 2) were roasted at 1180° C. for 40 minutes, and cooled to obtain fired ir...

Embodiment 2

[0041] A preparation method for preparing ceramsite by using low-silicon iron tailings powder, comprising the following steps:

[0042] 1) The raw materials for the preparation of the ceramsite weighed 85 parts of low-silicon iron tailings powder, 5 parts of straw powder, 3 parts of coal powder, 1 part of limestone powder and 6 parts of clay according to the weight ratio, and dried them at 130°C After 2h, mix evenly to obtain a mixture;

[0043] Among them, the particle size of iron tailings powder is less than 0.45mm, and the particle size of rice husk powder, coal powder, limestone powder and clay is all less than 0.15mm;

[0044] 2) Put the mixture prepared in step 1) into a disc pelletizer to form balls, spray industrial water glass solution with a concentration of 1.0% until the surface of the balls is wetted, and then dry the raw balls at 160°C 2h;

[0045] 3) The dried green balls in step 2) were calcined at 1150° C. for 60 min, and cooled to obtain calcined iron tail...

Embodiment 3

[0048] A preparation method for preparing ceramsite by using low-silicon iron tailings powder, comprising the following steps:

[0049] 1) The raw materials for the preparation of the ceramsite weighed 80 parts of low-silicon iron tailings powder, 9 parts of rice husk powder, 3 parts of coal powder, and 8 parts of clay, and dried them at 120°C for 3 hours, then mixed Evenly, the mixture is prepared;

[0050] Among them, the particle size of iron tailings powder is less than 0.45mm, and the particle size of rice husk powder, limestone powder and clay is less than 0.15mm;

[0051] 2) Put the mixture prepared in step 1) into a disc pelletizer to form balls, spray industrial water glass solution with a concentration of 0.8% until the surface of the balls is wetted, and then dry the raw balls at 140°C 3h;

[0052] 3) The dried green balls in step 2) were roasted at 1160° C. for 50 minutes, and cooled to obtain fired iron tailings ceramsite.

[0053] The particle size of the cera...

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Abstract

The invention discloses porous ceramsite made of low-silicon iron tailings and a preparation method of the porous ceramsite. The porous ceramsite is prepared from, by weight, 75-90 parts of low-silicon iron tailing powder or low-silicon iron tailing pulp, 5-20 parts of pore-forming agents and 1-8 parts of clay, wherein the SiO2 content in the low-silicon iron tailing powder or low-silicon iron tailing pulp is lower than 40%. The method includes: weighing and mixing the iron tailings, the pore-forming agents and the clay, and granulating the mixture into green balls; and after the green balls are dried, calcinating the dried green balls for 40-60min at the temperature of 1100-1180 DEG C, so that the ceramsite made of the iron tailings is obtained. By the method, the porous ceramsite conforming to architecture application and water treatment application can be prepared respectively. The ceramsite prepared by the method has the advantages of high strength and apparent porosity, low density, good thermal insulation property, high cost performance and the like, and can be used for preparing various light, sound-insulation and thermal-insulation materials or used as light building aggregate, water treatment biological carriers and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of tailings, and in particular relates to a porous ceramsite of low-silicon iron tailings and a preparation method thereof. Background technique [0002] Porous ceramsite has a wide range of uses, such as lightweight concrete aggregates, thermal insulation and sound insulation materials, sewage treatment, water treatment filter materials, etc. At present, raw materials such as fly ash, pottery clay, and clay are mostly used in production, and the production of iron tailings as raw materials has not yet been realized. The production of iron tailings in my country is huge; my country's iron ore has the characteristics of poor, fine and miscellaneous, and fine-grained iron tailings account for a large proportion. [0003] In recent years, researchers have begun to use iron ore tailings as raw materials to prepare porous ceramsite. The existing reports all use high-silicon tailings as raw mat...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B33/132
CPCY02P40/60
Inventor 雷国元宋均平刘博华
Owner 武钢资源集团有限公司
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