Methods for producing low density products

A low-density material and particle size technology, which is applied in the field of synthetic production engineering expanded particles, can solve problems such as difficult foaming agent matching, and achieve the effect of increasing the scope of use and reducing costs

Inactive Publication Date: 2006-07-19
JAMES HARDIE INT FINANCE BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is sometimes difficult to match the blowing agent to the material from which the microparticles are produced and to use the blowing agent in the most efficient manner

Method used

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  • Methods for producing low density products
  • Methods for producing low density products
  • Methods for producing low density products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0164] This example illustrates the production of expansive microinclusions from a formulation consisting of basalt and sodium hydroxide.

[0165] The formulation is prepared by mixing ground basalt with solid sodium hydroxide and water. Blowing agents were added in combination or separately with various mixtures of control agents including silicon carbide, sugar, carbon black, and coal. The formulations are listed in Table 1. The composition of the basalt is listed in Table 2.

[0166] Formulation 1A

[0167] This recipe illustrates the production of expanding microinclusions from a recipe consisting of basalt, sodium hydroxide, and sugar as a blowing agent.

[0168] The sample was obtained by grinding 92 grams of basalt (ground to d 50 The particle size is about 2 microns) and 5 grams of solid sodium hydroxide (tablets), 3 grams of technical sugar and 23 ml of water are prepared. The formulations are listed in Table 1.

[0169] Recipe 1B

[0170] This recipe illus...

Embodiment 2

[0193] This example illustrates the production of expansive microinclusions from formulations consisting of various silicate compounds, sodium hydroxide, and various blowing agents.

[0194] Expanded microinclusions were prepared from blends of soda-lime waste glass and various silicate materials. These blends also contain a mixture of a primary blowing agent and a control agent, such as a mixture of silicon carbide and a control agent silicon carbide, sugar and / or carbon black. The formulations are listed in Table 4. The composition of the waste glass used in this work is listed in Table 5.

[0195] Formulation 2A

[0196] This recipe illustrates the production of expanding microinclusions from a recipe consisting of glass, sodium hydroxide and silicon carbide as blowing agent and carbon black as control agent.

[0197] The sample was prepared by grinding 95.6 grams of glass (ground to d 50 A particle size of about 1 micron) was prepared by mixing 3 grams of solid sodiu...

Embodiment 3

[0224] This example illustrates the production of expansive microinclusions from formulations consisting of varying amounts of pozzolan, sodium hydroxide, a mixture of blowing and control agents, and other minor additives.

[0225] Formulation 3A

[0226] The sample was prepared by mixing 78.2 grams of pozzolan (ground to d 50 The particle size is about 3 microns) and 20 grams of solid sodium hydroxide (tablets), 0.8 grams of technical grade silicon carbide as the main blowing agent, 1 gram of technical grade carbon black as the control agent, and 43 milliliters of water.

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Abstract

The method of preparing a low-density material and precursor for forming a low-density material. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. Control of the blowing agent can be accomplished via a variety of means including appropriate distribution throughout the precursor, addition of a control agent into the precursor, or modification of the firing conditions i.e. oxygen deficient or fuel rich environment, plasma heating etc.

Description

technical field [0001] The present invention relates to methods of producing low density products, and more particularly to methods and formulations for the synthetic production of engineered expanded microparticles. Background of the invention [0002] Any discussion of the prior art throughout this specification should in no way be considered an admission that such prior art is widely known in the field, or forms part of the common general knowledge in the field. [0003] Cenospheres are spherical inorganic hollow microparticles (microspheres) found in the fly ash by-product of coal-fired power plants. Cenozoites generally constitute around 1-2% of fly ash and "collected" cenozoites are widely commercially available. The composition, form, size, shape and density of cenospheres are particularly advantageous for the formulation and manufacture of many low density products. [0004] One of the characteristics of cenospheres is their very high chemical durability. This exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04C04B38/02C03C11/00C04B18/02C04B20/00C04B28/02C04B38/00
CPCC04B28/02C04B38/009C04B18/027C04B18/023C04B20/0036C03C11/002C04B35/00C04B38/02B01J2/02B01J13/04
Inventor H·霍亚吉张华刚S·M·拉比尔尼克T·法姆
Owner JAMES HARDIE INT FINANCE BV
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