Method for preparing fire-resistant hydration-proof dolomite grog

A technology of dolomite and high temperature resistance, which is applied in the field of dolomite clinker and its processing, can solve the problems of unbreakable difficulty, loss of use performance, economic loss, etc., achieve long service life, simplify production process, and solve the problems of easy hydration Effect

Inactive Publication Date: 2008-07-09
张广发
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to keep the above method unbreakable, and it is very easy to damage during use. If the protective film, wax layer, oil layer or packaging is broken, peeled off o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] (1). Set the weight percentage to CaO20%, SiO 2 2 O 3 2 O 3 <0.5% of raw dolomite ore is lightly burned at 1050-1100°C to obtain a product containing CaO and MgO, which is fully digested with 43-45% by weight of water for 48-50 hours to form a powder;

[0028] (2). After the digested dolomite powder obtained in step (1) is sieved through a 0.5-1.0 mm sieve, it is dried until the residual water is less than 1 wt %, and then ground to be less than 0.074mm, that is, light-burned dolomite powder of more than 200 meshes, ready for use. Sampling and analysis, its chemical composition is as follows: CaO35%, SiO 2 2 O 3 2 O 3 <0.5%;

[0029] (3). Take 70Kg of light burned dolomite powder obtained in step (2) plus 30Kg of light burned magnesia powder, and its chemical composition by weight percentage is: CaO: 32.42%, MgO: 48.69%, SiO 2 : 1.01%, Fe 2 O 3 : 0.27%, Al 2 O 3 :0.29%, plus SiO according to weight percentage 2 , Fe 2 O 3 , CaF 2 , CeO 2 , P 2 O 5 And Ti...

Example Embodiment

[0035] Example 2:

[0036] (1). Set the weight percentage to CaO20%, SiO 2 2 O 3 2 O 3 <0.5% of raw dolomite ore is lightly burned at 1100°C, and the resulting CaO and MgO products are fully digested with 44% by weight of water for 48-50 hours to make them all form powder;

[0037] (2). After the digested dolomite powder obtained in step (1) is sieved through a 0.5-1.0 mm sieve, it is dried until the residual water is less than 1 wt %, and then ground to be less than 0.074mm, that is, light-burned dolomite powder of more than 200 meshes, ready for use. Sampling and analysis, its chemical composition is as follows: CaO35%, SiO 2 2 O 3 2 O 3 <0.5%;

[0038] (3). Take 80Kg of light burned dolomite powder obtained in step (2) plus 20Kg of light burned magnesia powder, and its chemical composition by weight percentage is: CaO: 34.38%, MgO: 42.78%, SiO 2 : 0.41%, Fe 2 O 3 : 0.18%, Al 2 O 3 :0.16%, plus SiO according to weight percentage 2 , Fe 2 O 3 , CaF 2 , CeO 2 , P 2 O 5 And TiO 2 T...

Example Embodiment

[0044] Example 3:

[0045] (1). Set the weight percentage to CaO20%, SiO 2 2 O 3 2 O 3 <0.5% of raw dolomite ore is lightly burned at 1050-1100°C, and the resulting CaO and MgO products are fully digested with 43-45% by weight of water for 48-50 hours to make them all powdered;

[0046] (2). After the digested dolomite powder obtained in step (1) is sieved through a 0.5-1.0 mm sieve, it is dried until the residual water is less than 1 wt %, and then ground to be less than 0.074mm, that is, light-burned dolomite powder of more than 200 meshes, ready for use. Sampling and analysis, its chemical composition is as follows: CaO35%, SiO 2 2 O 3 2 O 3 <0.5%;

[0047] (3). Take 100Kg of the lightly burned dolomite powder obtained in step (2), and its chemical composition by weight percentage is: CaO: 43.72%, MgO: 31.19%, SiO 2 :0.10%, Fe 2 O 3 :0.10%, Al 2 O 3 :0.07%, plus SiO according to weight percentage 2 , Fe 2 O 3 , CaF 2 , CeO 2 , P 2 O 5 And TiO 2 The binding agent of the componen...

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Abstract

Disclosed is a process for preparing a heat resisting and hydration resisting clinker dolomite, relating to a treatment method for clinker dolomite. Lightly burning the dolomite ores, then sample analysis after fully digesting with water, sifting out, drying and milling, adding the wedding agent of external components according to weight percentages: SiO2 takes 8-13%, P2O5 takes 1-2%, CaF2 takes 1-1.5%, CeO2 takes 0.25-0.5%, Fe2O3 takes 1-3%, TiO2 takes 2-4%, dry blending the wedding agent via a sand mixer, then evenly mixing the wedding agent in the sand mixer, adding water and fully stirring the wedding agent to obtain a calendaring and moistureless mass, producing billets according to density which is similar to or more than 2.2g/cm3, then drying the wedding agent, the sintering curve is that lighting a fire and evenly heating up to 300 DEC G for 6-8 hours, and evenly heating up from 300 DEC G to 800 DEC G for 9-11hours, evenly heating up from 800 DEC G to 1200 DEC G for 6-8 hours, evenly heating up from 1200 DEC G to 1600 DEC G for 12-14 hours, sintering the wedding agent at a constant temperature of more than 1600 DEC G for not less than 8 hours, thereby achieving the heat resisting and hydration resisting clinker dolomite.

Description

technical field [0001] The invention relates to a dolomite clinker and a processing method thereof, in particular to a method for preparing high temperature-resistant and waterproof dolomite clinker. Background technique [0002] Dolomite is CaCO 3 · MgCO 3 or CaO·MgO·2(CO 2 ) double salt, which has high refractoriness and steel slag corrosion resistance, is an excellent raw material for the production of magnesia-calcium bricks, and has abundant reserves and low price. But since it was calcined at 1100°C, CO 2 After all of it is discharged, a mixture of MgO and CaO is formed. This mixture has a very low specific gravity, low mechanical strength, high porosity and chemical activity, and is very easy to absorb water and deliquescence to form Ca(OH) 2 and Mg(OH) 2 It will swell by itself, causing the particles to hydrate and break into powder, which cannot be used as a refractory material in production, thus losing its use value. For a long time, people have been making ...

Claims

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Application Information

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IPC IPC(8): C04B2/10
CPCC04B2/10C04B2111/27C04B2111/28
Inventor 张广发
Owner 张广发
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