Application of thermal-insulation refractory gypsum powder

A gypsum powder and refractory technology, which is used in thermal insulation, climate change adaptation, building components, etc., can solve problems such as hazards and low utilization rates, and achieve the effects of good thermal insulation effect, fast hardening speed and light weight.

Inactive Publication Date: 2020-09-11
GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphogypsum is the largest type of by-product gypsum. Due to the low utilization rate, most of the phosphogypsum is stored in piles. Improper handling will seriously damage the ecology of the atmosphere, soil, and groundwater in the piled area and nearby areas. surroundings

Method used

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  • Application of thermal-insulation refractory gypsum powder
  • Application of thermal-insulation refractory gypsum powder

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1. A heat-retaining refractory gypsum powder, the composition of which includes the following raw materials in parts by weight: phosphogypsum 55, reinforcing material 11, polypropylene fiber 7, retarder 4, and modified shell powder 17.

[0024] Further, the preparation method of the thermal insulation refractory gypsum powder comprises the following steps:

[0025] 1. Preparation of reinforcement materials:

[0026] Soak the sisal fiber with an equal volume of Tween 80 for 4 hours, filter it out and dry it, then acidify it with hydrochloric acid.

[0027] 2. Preparation of modified shell powder:

[0028] Crush shells and add buffer solution, add latex dropwise when heated to 70°C, keep stirring until paste, freeze-dry and grind to obtain.

[0029] 3. Preparation of thermal insulation refractory gypsum powder:

[0030] a. Mix phosphogypsum and lime at a mass ratio of 4:1.5, calcinate at 250°C, take it out, grind it, irradiate it with ultraviolet light with a wavelengt...

Embodiment 2

[0034] 1. A thermal insulation refractory gypsum powder, the composition of which includes the following raw materials in parts by weight: citric acid gypsum 70, reinforcing material 15, polypropylene fiber 10, retarder 6, and modified shell powder 20.

[0035] Further, the preparation method of the thermal insulation refractory gypsum powder comprises the following steps:

[0036] 1. Preparation of reinforcement materials:

[0037] Soak sisal fiber with polysorbate of equal volume for 6h, filter out and dry, then acidify with phosphoric acid.

[0038] 2. Preparation of modified shell powder:

[0039] Crush shells, add sodium carbonate-sodium bicarbonate buffer solution, add latex dropwise when heated to 80°C, keep stirring until paste, freeze-dry and grind to obtain.

[0040] 3. Preparation of thermal insulation refractory gypsum powder:

[0041] a. Mix citrate gypsum and lime at a mass ratio of 5:2, calcinate at 300°C, take it out, grind it, irradiate it with ultraviolet ...

Embodiment 3

[0045] 1. A thermal insulation refractory gypsum powder, the composition of which includes the following raw materials in parts by weight: 40 desulfurized gypsum, 7 reinforcing materials, 5 polypropylene fibers, 2 retarders, and 15 modified shell powder.

[0046] Further, the preparation method of the thermal insulation refractory gypsum powder comprises the following steps:

[0047] 1. Preparation of reinforcement materials:

[0048] Soak sisal fiber with an equal volume of sodium dodecylbenzenesulfonate for 2 hours, filter it out and dry it, then acidify it with sulfuric acid.

[0049] 2. Preparation of modified shell powder:

[0050] Crush the shells, add sodium dihydrogen phosphate-citric acid buffer solution, add latex dropwise when heated to 60°C, keep stirring until it becomes a paste, freeze-dry, and then grind.

[0051] 3. Preparation of thermal insulation refractory gypsum powder:

[0052]a. Mix desulfurized gypsum and lime at a mass ratio of 2:1, calcinate at 200...

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Abstract

The invention belongs to the field of building materials, and particularly relates to application of a thermal-insulation refractory gypsum powder. The preparation method comprises the following stepsof: pretreating industrial by-product gypsum, preparing a reinforcing material, and carrying out graft modification on shell powder by using latex, then combining a simple and rapid preparation method to prepare the gypsum powder which can be used as a thermal-insulation refractory material to be applied to the building field and the medical field by utilizing byproduct gypsum, so that the gypsumpowder has an average thermal conductivity of 0.037W / (m.k), good thermal insulation effect and good fire resistance when being applied to the building field, and is light in weight, high in hardeningspeed and strong in supporting property when being used for a plaster bandage.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to the application of thermal insulation and refractory gypsum powder. Background technique [0002] Building insulation materials are used to reduce the indoor heat of the building to the outside by taking measures on the building's outer envelope, thereby maintaining the building's indoor temperature. Insulation materials mainly include: extruded polystyrene foam (extruded board), molded polystyrene foam (ordinary foam board), sprayed rigid polyurethane foam, rigid polyurethane foam insulation board (products), foam glass, Foam concrete (foam mortar), chemical foam cement board, lightweight aggregate insulation concrete, etc. However, the existing commonly used insulation materials, such as polystyrene board, are easy to fall off and crack, and are combustible, which has a relatively large potential safety hazard. Inorganic thermal insulation mortar is currently the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B11/02C04B20/02C04B20/10C04B14/28C04B18/24A61L15/08A61L15/14E04B1/76
CPCA61L15/08A61L15/14C04B11/007C04B11/024C04B14/28C04B18/248C04B20/026C04B20/1022C04B20/1037C04B28/142C04B28/143C04B28/144C04B2111/00431C04B2201/32E04B1/76C04B16/065C04B2103/22C04B20/023Y02W30/91Y02A30/244
Inventor 崔俊新罗进峰施辉朝杨步雷刘小成张启卫彭步平安光文宋维相杨永彬徐韦洪李贵汶朱国飞姚孟林韦明志王琴何珍张燕米林徐虎
Owner GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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