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CN-122010417-A - Fireproof rock wool board and preparation method thereof

CN122010417ACN 122010417 ACN122010417 ACN 122010417ACN-122010417-A

Abstract

The invention belongs to the technical field of rock wool boards, and particularly relates to a fireproof rock wool board, which comprises, by weight, 55-65 parts of basalt, 15-25 parts of slag, 8-12 parts of high silica sand, 8-12 parts of bauxite, 3-7 parts of dolomite, 3-7 parts of boric sludge, 30-40 parts of flame retardant, 8-12 parts of binder, 0.5-1.0 part of silane coupling agent I and 0.5-1.0 part of water repellent, wherein the flame retardant comprises, by weight, 20-28 parts of surface modified aluminum hydroxide, 4-6 parts of zinc borate and 6-8 parts of one-stage activated boric sludge. The preparation method comprises the following steps of S1 preparing surface modified aluminum hydroxide and one-stage activated boron mud, preparing a flame retardant and a binder, S2 uniformly mixing basalt, slag, high silica sand, bauxite, dolomite and boron mud, crushing, melting, throwing wires, adding the binder, a silane coupling agent and a water repellent to obtain rock wool fibers, S3 uniformly introducing the flame retardant into fiber layers of the rock wool fibers, paving to form a slab, S4 cold-press molding the slab, and solidifying.

Inventors

  • LIU JIE
  • CHEN KAI
  • ZHANG HAO

Assignees

  • 河北华能耐火保温材料股份有限公司

Dates

Publication Date
20260512
Application Date
20251126

Claims (8)

  1. 1. The fireproof rock wool board is characterized by comprising, by weight, 55-65 parts of basalt, 15-25 parts of slag, 8-12 parts of high silica sand, 8-12 parts of bauxite, 3-7 parts of dolomite, 3-7 parts of boric sludge, 30-40 parts of flame retardant, 8-12 parts of binder, 0.5-1.0 part of silane coupling agent I and 0.5-1.0 part of water repellent; The flame retardant comprises, by weight, 20-28 parts of surface modified aluminum hydroxide, 4-6 parts of zinc borate and 6-8 parts of one-stage activated boric sludge.
  2. 2. A fireproof rock wool board according to claim 1, wherein the binder comprises the following components, by weight, 5.6-8.4 parts of silica sol and 1.0-1.8 parts of aqueous phenolic resin.
  3. 3. A fire-resistant rock wool board according to claim 2, wherein the silica sol has a solids content of 30% and the aqueous phenolic resin has a solids content of 50%.
  4. 4. The fireproof rock wool board according to claim 1, wherein the preparation method of the surface modified aluminum hydroxide comprises the following steps of uniformly mixing silane coupling agent II accounting for 0.5-1.5% of the weight of aluminum hydroxide powder and absolute ethyl alcohol accounting for 1:10 of the weight ratio of the aluminum hydroxide powder, and stirring until the silane coupling agent II and the absolute ethyl alcohol are completely dissolved to prepare a modifier solution; Adding aluminum hydroxide powder into the modifier solution, stirring and drying under the stirring condition of 400-600r/min at the constant temperature of 80 ℃.
  5. 5. The fireproof rock wool board of claim 1, wherein the one-stage activated boric sludge is prepared by calcining boric sludge at 450-500 ℃ for 1-2 hours, cooling and crushing to 100-200 meshes.
  6. 6. The fireproof rock wool board of claim 1, wherein the water repellent is a silicone emulsion or an octyl triethoxysilane emulsion.
  7. 7. A method of producing a fire-resistant rock wool board according to any one of claims 1-6, characterized in that it comprises the steps of: s1, preparing surface modified aluminum hydroxide and one-stage activated boric sludge, and preparing a flame retardant and a binder; S2, uniformly mixing basalt, slag, high silica sand, bauxite, dolomite and boric sludge, crushing, melting, throwing wires, and adding a binder, a silane coupling agent and a water repellent to obtain rock wool fibers; S3, uniformly introducing a flame retardant into a fiber layer of the rock wool fiber, paving to form a slab; s4, cold press molding and solidification are carried out on the plate blank.
  8. 8. The method for preparing a fireproof rock wool board according to claim 7, wherein in step S1, the step of preparing a flame retardant comprises dry mixing surface modified aluminum hydroxide, zinc borate and one-stage activated boric sludge for 10-20 minutes.

Description

Fireproof rock wool board and preparation method thereof Technical Field The invention belongs to the technical field of rock wool boards, and particularly relates to a fireproof rock wool board and a preparation method thereof. Background The rock wool board is made of basalt and other natural ores as main raw materials, and is subjected to high-temperature melting and centrifugal fiber forming, and then a proper amount of binder is added to solidify to form the A-level nonflammable heat insulation material, so that along with the improvement of building safety standards, the market has higher requirements on the fire resistance limit, the smoke toxicity and the long-term stability of the rock wool board. To improve fire performance, the prior art has generally employed the addition of aluminum hydroxide as a flame retardant to rock wool fibers. On one hand, a large amount of aluminum hydroxide powder forms stress defect points in a rock wool fiber network, the integrity of a three-dimensional fiber skeleton is seriously damaged, so that the tensile strength of a plate vertical to the surface is obviously reduced, the high requirement of high-rise building external wall insulation on anchoring drawing force cannot be met, and on the other hand, the fire-retarding mechanism is single, and the protection capability on continuous high-temperature fire is insufficient. Disclosure of Invention The invention aims to provide a fireproof rock wool board and a preparation method thereof, which aim to solve the technical problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The fireproof rock wool board comprises the following raw materials, by weight, 55-65 parts of basalt, 15-25 parts of slag, 8-12 parts of high silica sand, 8-12 parts of bauxite, 3-7 parts of dolomite, 3-7 parts of boric sludge, 30-40 parts of flame retardant, 8-12 parts of binder, 0.5-1.0 part of silane coupling agent I and 0.5-1.0 part of water repellent; The flame retardant comprises, by weight, 20-28 parts of surface modified aluminum hydroxide, 4-6 parts of zinc borate and 6-8 parts of one-stage activated boric sludge. A fireproof rock wool board according to claim 1, wherein the binder comprises the following components, by weight, 5.6-8.4 parts of silica sol and 1.0-1.8 parts of aqueous phenolic resin. As a further improvement of the invention, the solids content of the silica sol is 30% and the solids content of the aqueous phenolic resin is 50%. The preparation method of the surface modified aluminum hydroxide comprises the following steps of uniformly mixing 0.5-1.5% by weight of the aluminum hydroxide powder of a silane coupling agent II and absolute ethyl alcohol with the mass ratio of the aluminum hydroxide powder to the absolute ethyl alcohol of 1:10, and stirring until the mixture is completely dissolved to prepare a modifier solution; Adding aluminum hydroxide powder into the modifier solution, stirring and drying under the stirring condition of 400-600r/min at the constant temperature of 80 ℃. As a further improvement of the invention, the preparation method of the one-stage activated boric sludge comprises the steps of calcining the boric sludge at 450-500 ℃ for 1-2 hours, cooling and crushing to 100-200 meshes. As a further improvement of the invention, the water repellent is emulsified silicone oil or octyl triethoxysilane emulsion. The preparation method of the fireproof rock wool board comprises the following steps: s1, preparing surface modified aluminum hydroxide and one-stage activated boric sludge, and preparing a flame retardant and a binder; S2, uniformly mixing basalt, slag, high silica sand, bauxite, dolomite and boric sludge, crushing, melting, throwing wires, and adding a binder, a silane coupling agent and a water repellent to obtain rock wool fibers; S3, uniformly introducing a flame retardant into a fiber layer of the rock wool fiber, paving to form a slab; s4, cold press molding and solidification are carried out on the plate blank. As a further improvement of the invention, in the step S1, the step of preparing the flame retardant comprises the step of dry-mixing surface modified aluminum hydroxide, zinc borate and one-stage activated boric sludge for 10-20 minutes. The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the flame retardant comprises surface modified aluminum hydroxide, zinc borate and one-stage activated boric sludge, wherein the surface modified aluminum hydroxide is used for absorbing heat and retarding flame of a core to provide initial fire protection, the zinc borate is used for releasing borate substances at high temperature to cover the surface of fibers to form a heat-insulating carbon layer and inhibit smoke generation, the one-stage activated boric sludge is used for forming a glassy fusion layer at high temperature to wrap the fibers and prevent oxygen from contacting