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Novel heat storage brick and preparation method thereof

A heat storage brick, a new type of technology, applied in clay products, applications, household appliances, etc., can solve the problems of poor volume stability, etc., and achieve the effect of compact structure, low price and high volume density

Inactive Publication Date: 2021-11-30
SHANDONG KEXIN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At different temperatures, the volume of the scale in the rolling mill changes, resulting in poor volume stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The chemical composition after drying is TFe: 35~50%, SiO 2 : 30~40% copper slag is processed into: 10~5mm, 5~3mm, 3~1mm, 1~0.088mm, <0.088mm fine powder five-grade particles. Select industrial magnesium sulfate as the binder, and use the following mass percentages for batching: copper slag 10~5mm: 15%, 5~3mm: 10%, 3~1mm: 25%, 1~0.088mm: 15%, <0.088mm Fine powder: 30%, industrial grade magnesium sulfate 5%. Add appropriate amount of water, mix the material in the mixer for 5 minutes, and discharge the material for brick pressing. The adobes are left to dry naturally for 3 days, and then fired at low temperature.

[0027] The firing system is as follows: normal temperature ~100 o C: heating speed 10 o C / h; 100 o C: keep warm for 10h; 100~250 o C: heating speed 8 o C / h; 250 o C: keep warm for 10 hours; naturally cool to room temperature.

[0028] Product performance: bulk density 3.2g / cm 3 , apparent porosity 12%, heat capacity 3.25 MJ / (m 3 .K), thermal conduct...

Embodiment 2

[0030] The chemical composition after hydration and drying is TFe: 18~20%, CaO / SiO 2 : 2~3 steelmaking oxide slag is processed into: 10~5mm, 5~3mm, 3~1mm, 1~0.088mm, <0.088mm fine powder five-grade particles. The liquid water glass of industrial product M=2.8 is selected as the binding agent. The following mass percentages are used for batching: steelmaking oxide slag 10~5mm: 20%, 5~3mm: 10%, 3~1mm: 25%, 1~0.088mm: 14%, <0.088mm fine powder: 31%, liquid Water glass 5% (additional). Mix the materials in the mixer for 5 minutes, and discharge the materials for pressing bricks. The adobes are left to dry naturally for 3 days and then fired at low temperature.

[0031] The firing system is as follows: normal temperature ~100 o C: heating speed 10 o C / h; 100 o C: keep warm for 10h; 100~350 o C: heating speed 8 o C / h; 350 o C: keep warm for 10 hours; naturally cool to room temperature.

[0032] Product performance: bulk density 3.25g / cm 3 , apparent porosity 12%, heat cap...

Embodiment 3

[0034]The chemical composition after drying is TFe: 35~50%, SiO 2 : 30~40% copper slag is processed into: 10~5mm, 5~3mm, 3~1mm, 1~0.088mm, <0.088mm fine powder five-grade particles. Magnesium oxide and silica fume are used as binders. The following mass percentages are used for batching: copper slag 10~5mm: 15%, 5~3mm: 10%, 3~1mm: 25%, 1~0.088mm: 15%, <0.088mm fine powder: 27%, magnesium oxide 4 %, silica fume 4%, plus an appropriate amount of water. Mix the materials in the mixer for 5 minutes, and press the bricks on the friction press after discharging. The adobes are left to dry naturally for 3 days, and then fired at low temperature.

[0035] The firing system is as follows: normal temperature ~100 o C: heating speed 10 o C / h; 100 o C: keep warm for 10h; 100~200 o C: heating speed 8 o C / h; 200 o C: keep warm for 10 hours; naturally cool to room temperature.

[0036] Product performance: bulk density 3.2g / cm 3 , apparent porosity 12%, heat capacity 3.20 MJ / (m 3...

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Abstract

The invention provides a method for preparing a heat storage brick by taking steelmaking oxidizing slag or copper slag fayalite as a main raw material, cooperatively using a proper amount of a binding agent and carrying out mixing, forming and low-temperature firing. Thus, the heat storage capacity and the volume stability of the heat storage brick are improved, and meanwhile, cost is low.

Description

technical field [0001] The invention relates to the technical field of refractory brick heat storage engineering, in particular to a heat storage brick produced by using industrial waste furnace slag and a preparation method thereof. Background technique [0002] Selecting a heat storage body with excellent performance, optimized structure, and good energy-saving effect is the prerequisite for designing a high-performance regenerative heat exchanger. Phase change materials have good energy storage performance and can store and release industrial waste heat. However, phase change Materials tend to be limited by the temperature they can be used in, and their relatively low heat capacity doesn't work very well. The solid oxide regenerator has a large volume density, a large volume heat storage capacity and has a large development space. [0003] The commonly used materials for solid regenerators are silicon, high alumina, mafic, corundum, cordierite, magnesia, mullite, etc. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/138C04B33/13C04B33/24C04B33/30
CPCC04B33/138C04B33/131C04B33/24C04B33/1328C04B33/30C04B2235/3206C04B2235/448C04B2235/444C04B2235/3427C04B2235/447C04B2235/9607C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96Y02P40/60
Inventor 田守信贺恒星申娟娟
Owner SHANDONG KEXIN NEW MATERIALS
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