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Magnesia-calcium clinker and preparation method thereof

A technology of magnesia-calcium sand and borax, which is applied in the field of refractory materials, can solve problems such as difficult hydration characteristics, and achieve the effects of improving hydration resistance, promoting sintering, and promoting the formation and growth of grains

Inactive Publication Date: 2017-09-22
胡果青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the fact that CaO in magnesium-calcium materials still exists in the form of free state, it is difficult to solve the problem of easy hydration characteristics, and a kind of magnesium-calcium sand and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] Preparation of additives:

[0027] A. According to the mass ratio of 1:3:4, put lithium oxide, sodium silicate and water into the container, stir at 600r / min for 10-15min, collect the stirred mixture and use 1.8mol / L sodium hydroxide solution to adjust the pH to 8.5~9.5, stand still for 4~6h;

[0028] B. After standing still, add sodium polystyrene sulfonate with 3-5% sodium silicate mass into the container, raise the temperature to 50-55°C, keep it warm for 1-2h, cool to room temperature, put the contents in the container Put it into a freeze dryer for freeze drying, collect the freeze-dried product, put it into a pulverizer to pulverize, pass through a 200-mesh sieve, and collect the sieved particles to obtain the additive.

[0029] The magnesium-calcium sand of the present invention comprises the following raw materials in parts by weight: 100-110 parts of dolomite, 80-90 parts of magnesite, 25-30 parts of borax, 10-15 parts of additives, 6-8 parts of calcium hydrox...

example 1

[0037] Preparation of additives:

[0038] A. According to the mass ratio of 1:3:4, put lithium oxide, sodium silicate and water into the container, stir at 600r / min for 15min, collect the stirred mixture and use 1.8mol / L sodium hydroxide solution to adjust the pH to 9.5, Stand still for 6h;

[0039] B. After standing still, add sodium polystyrene sulfonate with 5% sodium silicate mass to the container, heat up to 55°C, keep warm for 2h, cool to room temperature, and put the contents in the container into a freeze dryer for drying Freeze-drying, collecting the freeze-dried product, putting it into a pulverizer for crushing, passing through a 200-mesh sieve, and collecting the sieved particles to obtain the additive.

[0040] The magnesium-calcium sand of the present invention comprises the following raw materials in parts by weight: 110 parts of dolomite, 90 parts of magnesite, 30 parts of borax, 15 parts of additives, and 8 parts of calcium hydroxide.

[0041] The preparatio...

example 2

[0048] Preparation of additives:

[0049] A. According to the mass ratio of 1:3:4, put lithium oxide, sodium silicate and water into the container, stir at 600r / min for 10min, collect the stirred mixture and use 1.8mol / L sodium hydroxide solution to adjust the pH to 8.5, Stand still for 4h;

[0050] B. After standing still, add sodium polystyrene sulfonate with 3% sodium silicate mass to the container, heat up to 50°C, keep warm for 1h, cool to room temperature, and put the contents in the container into a freeze dryer for drying Freeze-drying, collecting the freeze-dried product, putting it into a pulverizer for crushing, passing through a 200-mesh sieve, and collecting the sieved particles to obtain the additive.

[0051] The magnesium-calcium sand of the present invention comprises the following raw materials in parts by weight: 100 parts of dolomite, 80 parts of magnesite, 25 parts of borax, 10 parts of additives, and 6 parts of calcium hydroxide.

[0052] The preparatio...

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Abstract

The invention relates to a magnesia-calcium clinker and a preparation method thereof, and belongs to the technical field of fireproof materials. The preparation method comprises the following steps: firstly stirring lithium oxide, sodium silicate and water uniformly, standing and adding sodium polystyrenesulfonate; after rising the temperature and keeping warm, cooling, then carrying out freeze drying, smashing, sieving, and collecting sieved particles, thus obtaining an additive; then smashing dolomite and magnesite, collecting a smashed mixture, uniformly mixing the smashed mixture with a sodium hydroxide solution and sodium benzenesulfonate, standing and filtering; drying after flushing filter residue, carrying out milling, roasting, ball milling and standing digestion on a filter mixture with borax, the additive and calcium hydroxide after carrying out magnetic separation and impurity removing, and collecting a digested mixture; carrying out extrusion forming on the digested mixture, collecting an extruded matter, drying, sintering and smashing. The magnesia-calcium clinker prepared by the method is low in apparent porosity and has higher compactness, and meanwhile, the magnesia-calcium clinker is not easy to dissolve by water and is good in water resistance.

Description

technical field [0001] The invention relates to magnesia-calcium sand and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Magnesia-calcium material has excellent high-temperature performance and use effect. It can replace magnesia-chrome bricks in the high-temperature zone of cement kiln and avoid the pollution of hexavalent chromium. It is a kind of refractory material without environmental pollution. The raw materials used in the production of magnesium-calcium materials are large reserves of dolomite and limestone, which are far more abundant than magnesite resources; moreover, magnesium-dolomite mines are widely distributed, and almost every province has them. In the process of use, local materials can be obtained to develop magnesium-calcium The material is more economical and reasonable. Magnesium-calcium refractories have become the development trend of basic refractories. my country's magnesium-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043
CPCC04B35/043C04B2235/3206C04B2235/321C04B2235/3409
Inventor 周夕和薛焱璟王磊
Owner 胡果青