A high temperature resistant inorganic composite adhesive and a method for preparing the same are disclosed, and the adhesive comprises aluminum hydroxide 5-12%, phosphoric acid 15-35%, rare earth oxide 0.1-1%, silica sol 5-20%, aluminum polyphosphate 1-15%, borax 1-5% and balance of water. The adhesive is used as a high temperature painting for temporarily protecting surfaces of metal components from oxidation under heat treatment at a temperature of 400 to 1000 oC, and it maintains good adhesive property in the high temperature environment of heating furnaces, thereby decreasing oxidation loss of metal components during the heat treatment and improving the quality of material surfaces; and it can be used for high temperature furnace mending materials and refractory to enhance their strength and prolong their lifetime.

High temperature resistant inorganic composite adhesive

The invention provides an instantaneous curing agent used for preparing a high temperature-resistant steel plate-bonding acid-resistant water-plugging adhesive, and the high temperature-resistant steel plate-bonding acid-resistant water-plugging adhesive prepared from the instantaneous curing agent and application thereof. The instantaneous curing agent comprises bauxite, kaolin, aluminate cement, iron oxide red iron oxide red and lightweight magnesium oxide. A high-temperature steel plate adhesive comprises phosphoric acid, aluminum hydroxide, water, bauxite, kaolin and silicic acid sol. The instantaneous curing agent and the high-temperature steel plate adhesive are mixed to prepare the high temperature-resistant steel plate-bonding acid-resistant water-plugging adhesive. The high temperature-resistant steel plate-bonding acid-resistant water-plugging adhesive is applied in coal-fired power generation desulphurization and denitration apparatuses for, on an operation occasion, plugging and repairing leaking points when a metal pipeline has leakage. The adhesive has good bonding force with steel and can resist high temperature, acid, water and weak base; under the condition of leakage of acid water, the adhesive firmly bonds with steel and can instantaneously solidify in a solidification time period; and the adhesive is a novel leak stopping, sealing and repairing material for leak points of steel pipelines of desulphurization and denitration apparatuses in a coal-fired power plant without shutdown at present.

Instantaneous curing agent used for preparing high temperature-resistant steel plate-bonding acid-resistant water-plugging adhesive, and high temperature-resistant steel plate-bonding acid-resistant water-plugging adhesive prepared from instantaneous curing agent and application thereof

The invention relates to the technical field of adhesives, and concretely relates to a high temperature resistant adhesive production method. The method comprises the following steps: 1, adding 20-30 parts by weight of an epoxy resin, 3-5 parts by weight of aluminum hydroxide and 8-10 parts by weight of water to a reaction kettle, and stirring for 5-10min; 2, adding 20-30 parts by weight of high-alumina bauxite, 3-5 parts by weight of a silica sol and 4-6 parts by weight of an antioxidant to the reaction kettle in step 1, and stirring for 10-15min; and 3, filling a finished product obtained in step 2. An adhesive obtained through adding the high-alumina bauxite, the silica sol and the antioxidant to main raw materials comprising the epoxy resin and aluminum hydroxide and stirring has the characteristics of strong adhesion, convenient operation, no shedding after solidification, good leak repairing effect and the like, is mainly used as a steel plate adhesive, is specially used for repairing metal pipelines and metal cracks in a heated state, and is also used for adhering the worn positions or cracks of boiler pipelines.

High temperature resistant adhesive production method

The invention relates to a preparation process of fireproof blocking paste. The process comprises steps as follows: raw materials are prepared in the principle that every 100 parts by weight of the raw materials contain 65-70 parts of Guanyin soil, 6-8 parts of glutinous rice flour, 8-12 parts of slaked lime, 15-20 parts of water and 1-2 parts of carbolic acid, and powder is prepared from the Guanyin soil and the slaked lime for later use; the well prepared glutinous rice flour and water are mixed, boiled for 40-80 min and kept at the constant temperature for 2-3 h, and a glutinous rice liquid is prepared; carbolic acid and the slaked lime are poured in the glutinous rice liquid prepared in the former step, stirred and mixed uniformly; the Guanyin soil is poured in a product obtained in the former step and stirred into paste by a stirrer; the paste in the former step is taken out, kneaded into a block and cut, and the cut paste is subjected to vacuum packaging by the aid of plastic bags.

Fireproof blocking paste formula and preparation process thereof

The invention provides a sealing and leakage stopping technology for a nonmetal expansion joint in the online operation state. The inventor invents the patent, with the patent number as ZL 201510503242.7, named as 'Instant curing agent for manufacturing high-temperature-resistant acid-resistant water plugging steel plate sticking adhesive, high-temperature-resistant acid-resistant water plugging steel plate sticking adhesive manufactured with the instant curing agent and application of high-temperature-resistant acid-resistant water plugging steel plate sticking adhesive'. According to the sealing and leakage stopping technology for the nonmetal expansion joint in the online operation state, the high-temperature-resistant acid-resistant water plugging steel plate sticking adhesive and theinstant curing agent for the high-temperature-resistant acid-resistant water plugging steel plate sticking adhesive which are mentioned are both the materials disclosed in the patent ZL 201510503242.7. By the adoption of the sealing and leakage stopping technology, the portion, where leakage is generated in the operation state, of the nonmetal expansion joint can be used until a preset boiler overhauling moment, so that the environmental pollution is reduced, safety accidents are avoided, and the economic loss caused by blowing down of an enterprise is reduced.

Sealing and leakage stopping technology for nonmetal expansion joint in online operation state

A refractory adhesive steel plates is prepared through such steps as mixing aluminium hydroxide with water, adding phosphoric acid, stirring while heating to boil, and mixing with bauxite, kaolinite and silicate sol until it becomes paste. It can be used to block leakage and repair of high-temp metal pipeline (such as the one in boiler) with high adhesion.

Wenjun Lu

Papers

High temperature resisting adhesive for steel plates, production and use thereof