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A kind of sheath type magnesium oxide for fireproof cable

A technology of fireproof cable and fused magnesia, applied in the field of magnesia, can solve the problems of non-moisture resistance, low insulation, temperature difference resistance, etc., and achieve the effect of improving insulation performance, reducing production cost, and formulating scientifically.

Active Publication Date: 2018-07-10
DASHIQIAO MEIR MAGNESIUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to propose a method for preparing a sheathed magnesia for fireproof cables, which is simple and easy to do, aiming at the problems of low insulation of the existing sheathed magnesia, poor temperature resistance, no moisture proof, and smoke emission. Sheath type magnesium oxide for fireproof cable prepared by adopting the method

Method used

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  • A kind of sheath type magnesium oxide for fireproof cable
  • A kind of sheath type magnesium oxide for fireproof cable
  • A kind of sheath type magnesium oxide for fireproof cable

Examples

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Embodiment 1

[0034] This embodiment discloses a preparation method of sheathed magnesium oxide for fireproof cables, comprising the following steps:

[0035] Step 1. The fused magnesia raw material is pulverized to 300-400 mesh, magnetically separated by a magnetic separator to remove ferromagnetic impurities, then baked in a rotary furnace at 600°C, and cooled for later use;

[0036] Step 2, calcining kaolin with an iron oxide content lower than 0.4 at a temperature of 800° C. for 1 hour;

[0037] Step 3, silicone oil and toluene are configured into a solution according to the weight ratio of 1:90;

[0038] Step 4, mixing the fused magnesia obtained in step 1 with the kaolin obtained in step 2 in a blender at a weight ratio of 1000:4;

[0039] Step 5. Mix the mixture obtained in step 4 with the solution prepared in step 3 in a blender at a weight ratio of 1000:1;

[0040] Step 6, drying the mixture obtained in step 5 in a rotary oven at 300°C for 60 minutes, and cooling it for use;

[...

Embodiment 2

[0050] This embodiment discloses a preparation method of sheathed magnesium oxide for fireproof cables, comprising the following steps:

[0051] Step 1. The fused magnesia raw material is pulverized to 200-300 mesh, magnetically separated by a magnetic separator to remove ferromagnetic impurities, then baked in a rotary furnace at 700°C, and cooled for later use;

[0052] Step 2, calcining kaolin with an iron oxide content lower than 0.5 at a temperature of 900° C. for 3 hours;

[0053] Step 3, silicone oil and toluene are configured into a solution according to the weight ratio of 1:90;

[0054] Step 4, mixing the fused magnesia obtained in step 1 with the kaolin obtained in step 2 in a blender at a weight ratio of 1000:5;

[0055] Step 5. Mix the mixture obtained in step 4 with the solution prepared in step 3 in a blender at a weight ratio of 1100:1;

[0056] Step 6, drying the mixture obtained in step 5 in a rotary oven at 400°C for 30 minutes, and cooling it for use;

...

Embodiment 3

[0066] This embodiment discloses a preparation method of sheathed magnesium oxide for fireproof cables, comprising the following steps:

[0067] Step 1. The fused magnesia raw material is pulverized to 400-500 mesh, magnetically separated by a magnetic separator to remove ferromagnetic impurities, then baked in a rotary furnace at 500-700°C, and cooled for later use;

[0068] Step 2, calcining kaolin with an iron oxide content lower than 0.5 at a temperature of 900° C. for 3 hours;

[0069] Step 3, silicone oil and toluene are configured into a solution according to the weight ratio of 1:120;

[0070] Step 4, mixing the fused magnesia obtained in step 1 with the kaolin obtained in step 2 in a blender at a weight ratio of 1000:7;

[0071] Step 5. Mix the mixture obtained in step 4 with the solution prepared in step 3 in a blender at a weight ratio of 900:1;

[0072] Step 6, drying the mixture obtained in step 5 in a rotary oven at 200°C for 90 minutes, and cooling it for use;...

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Abstract

The invention provides a sheath type magnesium oxide for fireproof cables. The preparation method of the sheath type magnesium oxide for fireproof cables includes the following steps: configuring silicone oil and toluene into a solution in proportion, and crushing, magnetically separating, and baking the electric Mix fused magnesia and calcined kaolin in proportion; mix the mixture with the solution; dry the mixture in a rotary kiln and mix it with aluminum dihydrogen phosphate powder in proportion; mix the mixture with water to obtain wet magnesia Pressing and forming in a grinding tool; drying and solidifying the formed magnesium oxide in an oven, and cooling to obtain a sheath type magnesium oxide for fireproof cables. The invention has the advantages of low cost, high insulation performance, good moisture-proof performance, high strength and strong high-temperature resistance performance.

Description

technical field [0001] The invention relates to magnesium oxide technology, in particular to a sheath type magnesium oxide for fireproof cables. Background technique [0002] The existing sheath-type magnesia uses low-grade raw materials, poor insulation temperature resistance, and no moisture-proof performance. The binder used to prepare the sheath is usually clay or resin. The use of clay will easily lead to a decrease in insulation performance, and resin is used as a bonding agent. Additives will reduce the temperature resistance of the sheathed magnesia, so it cannot be heated at a high temperature of 1300 °C. And the use of resin will smoke when heated at high temperature. Contents of the invention [0003] The object of the present invention is to propose a method for preparing a sheathed magnesia for fireproof cables, which is simple and easy to do, aiming at the problems of low insulation of the existing sheathed magnesia, poor temperature resistance, no moisture ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/10H01B7/18H01B7/282H01B7/29
CPCY02A30/14
Inventor 李广明荆巍张呈呈刘永利田剑郭兴凯
Owner DASHIQIAO MEIR MAGNESIUM PROD
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