Technology for preparing porous heat insulation plates by sintering iron tailings

A technology for thermal insulation board and preparation process, applied in thermal insulation, ceramic products, building components and other directions, can solve the problems of small specific gravity, restrict the development of the construction industry, etc., and achieve the effects of low cost, good economic and social benefits, and simple process

Inactive Publication Date: 2010-02-03
XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the development of wall materials in the past 20 years, my country's wall material industry has embarked on the road of multi-variety and multi-functional development, and initially formed a wall material system based on bricks, blocks, and panels, such as concrete hollow blocks, Gypsum board, fiber cement sandwich board, etc., but the proportion of various light boards and composite boards representing the modern level of wall materials is still very small, less than 3% of the total wall materials, which restricts the construction industry development of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation process for iron tailings sintered porous insulation board, characterized in that the preparation process is:

[0022] (1) Send the shale and iron tailings to the jaw crusher and hammer crusher for crushing respectively, the particle size after crushing is ≤25mm, and then send them to the ball mill for grinding, and the ground shale and iron tailings are screened , metering, the grinding fineness is between 20 and 80 μm;

[0023] (2) Add toughening agent, co-solvent and foaming agent to the shale and iron tailings with a grinding fineness of 20-80 μm according to the mass percentage, mix them, send them into the mixer and mix them evenly, and then pass through the silo, The mass percentage of the pre-added mixture is 3-15% water into balls and granulated, and the particle size of raw meal balls is 1-7mm;

[0024] (3) After 24 hours of natural drying, the raw material balls in step (2) are evenly distributed in the mold that has been cleaned and sprayed wi...

Embodiment 2

[0028] The difference between this embodiment and Example 1 is that the mass percentages of iron tailings, shale, toughening agent, cosolvent and foaming agent described in step (2) are: iron tailings 15%, shale 40% , toughening agent 15%, cosolvent 20%, blowing agent 10%; Described toughening agent is a kind of in muscovite, silicon carbide and fluorite, and described cosolvent is borax, potassium feldspar, sodium feldspar One of stone and lead oxide, the foaming agent is a mixture of sodium carbonate powder, silicon carbide powder, iron powder and calcium phosphate powder, the mass percentage is: sodium carbonate powder 10%, silicon carbide powder 30%, iron powder 30% %, calcium phosphate powder 30%. Other steps are the same as in Example 1.

Embodiment 3

[0030] The difference between this embodiment and Example 1 is that the mass percentages of iron tailings, shale, toughening agent, cosolvent and foaming agent described in step (2) are: iron tailings 10%, shale 55% , toughening agent 10%, cosolvent 20%, blowing agent 5%; Described toughening agent is a kind of in muscovite, silicon carbide and fluorite, and described cosolvent is borax, potassium feldspar, sodium feldspar One of stone and lead oxide, the foaming agent is a mixture of sodium carbonate powder, silicon carbide powder, iron powder and calcium phosphate powder, the mass percentage is: sodium carbonate powder 5%, silicon carbide powder 15%, iron powder 20% %, calcium phosphate powder 60%. Other steps are the same as in Example 1.

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PUM

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Abstract

The invention provides technology for preparing porous heat insulation plates by sintering iron tailings, comprising the following steps: breaking and then grinding shale and the iron tailings, sieving and measuring the ground shale and iron tailings to ensure the fineness is 20-80mu m; adding toughening agents, cosolvents and foaming agents into the ground shale and iron tailings in proportion and mixing the above materials, adding water to the mixture for prilling, after natural drying, distributing raw material balls on the moulds, then placing the moulds into a kiln to be sintered by way of sectional heating, and finally stacking the products after demoulding the cooled plates. The technology utilizes a great number of iron tailings with the highest addition up to 40%, saves energy andis beneficial to environmental protection. The volume density and pore sizes and distribution of the plates can be controlled by the addition and sintering schedules of the foaming agents. The prepared plates enjoy uniform pore distribution, high strength and good heat preservation and insulation properties.

Description

technical field [0001] The invention belongs to the technical field of solid waste utilization, and relates to a preparation process of a porous heat preservation plate, in particular to a preparation process of a sintered iron tailings porous heat preservation plate. Background technique [0002] As of 2005, the national building stock was 40 billion m 2 , according to the medium and long-term development plan for 2006-2020, 30 billion m 2 Various buildings, with an average annual construction of 2 billion m 2 , and the demand for wall materials is huge, reaching 800 billion pieces (equivalent to ordinary bricks). In recent years, in order to protect cultivated land, protect the environment, and save energy, the state has issued relevant policies that will gradually ban the use of traditional clay sintered wall materials; and in the field of mineral processing, the amount of mineral processing waste slag discharged has reached 5 to 6 billion tons, and each year With a gr...

Claims

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Application Information

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IPC IPC(8): E04B1/80B02C1/02B02C13/00B02C17/00C04B38/00
Inventor 肖慧李寿德刘媛媛
Owner XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD
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