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Unburned magnesium-calcium-carbon brick and preparation method thereof

A magnesia-calcium-carbon brick and magnesia-calcium sand technology, applied in the field of refractory materials, can solve the problems of not much improvement in service life, low cost performance and high production cost, and achieve the effects of increased processing rate, improved cost performance and strong corrosion resistance.

Inactive Publication Date: 2012-02-15
PERFECT WORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, most of the magnesia-calcium-carbon bricks used in domestic stainless steel and special steel smelting ladles use anhydrous resin as the binder. Due to the high price of anhydrous resin on the market, the production cost is relatively high. , and its service life is not much improved compared with similar products (ordinary magnesia carbon bricks), so its cost performance is low

Method used

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Experimental program
Comparison scheme
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Embodiment

[0020] Embodiment: produce 100 tons of unfired magnesia-calcium carbon bricks

[0021] 1. First determine the production formula, that is, the proportion of various raw materials. The formula is: magnesia calcium sand 7-5mm 10%, 5-3mm 15%, 3-1mm 24%, 1-0.5mm 20%; 98 fused magnesia ≤0.5mm 22%; modified asphalt binder 3%; 97 flake graphite 4%; metal magnesium powder additive 2%.

[0022] According to the calculation, the amount of each raw material is: 10 tons of magnesia-calcium sand 7-5mm, 15 tons of 5-3mm, 24 tons of 3-1mm, 20 tons of 1-0.5mm; 22 tons of fused magnesia ≤0.5mm; modified asphalt combined 3 tons of agent; 4 tons of 97 flake graphite; 2 tons of metal magnesium powder additive.

[0023] 2. Batching and mixing. According to the above production formula, batching is carried out. The total weight of each batching is 1000kg. The specific batching is: magnesia calcium sand 7-5mm 100kg, 5-3mm 150kg, 3-1mm 240kg, 1-0.5mm 200kg; 98 fused magnesia ≤ 0.5mm 220kg; modifi...

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Abstract

The invention discloses an unburned magnesium-calcium-carbon brick and a preparation method thereof. The unburned magnesium-calcium-carbon brick comprises 9-16 wt% of MgO-CaO clinker with the particle size of 5-7 mm, 9-16 wt% of MgO-CaO clinker with the particle size of 3-5 mm, 9-16 wt% of MgO-CaO clinker with the particle size of 1-3 mm, 13-32 wt% of MgO-CaO clinker with the particle size of 0.5-1 mm, 5-25 wt% of fused magnesia with the particle size of no larger than 0.5 mm, 2-5 wt% of modified asphalt bonding agent, 3-5 wt% of flake graphite, and 2-5 wt% of metal magnesium powder additive. The preparation method comprises the following steps: according to the raw material, carrying out combination of the formula, preparing materials, mixing, molding, sintering, and waxing, and then carrying out vacuum aluminum foil packaging. The unburned magnesium-calcium-carbon brick has high hydration resistance property, high slag resistance property because of high purity, and better thermal shock resistance than other like products. Simultaneously, the method has the advantages of simple process and low cost. The brick contains free CaO, so that the brick has excellent performance of purifying molten steel, and is very suitable for preparing stainless steel and other high cleaness steel.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a non-fired magnesia calcium carbon brick and a preparation method thereof. Background technique [0002] At present, most of the magnesia-calcium-carbon bricks used in domestic stainless steel and special steel smelting ladles use anhydrous resin as the binder. Due to the high price of anhydrous resin on the market, the production cost is relatively high. , and its service life is not much improved compared with similar products (ordinary magnesia carbon bricks), so its cost performance is low. Contents of the invention [0003] The present invention aims at the technical problems existing in the above-mentioned prior art, and provides an unfired magnesia-calcium-carbon brick with low cost and long service life and a preparation method thereof. [0004] Technical scheme of the present invention is realized like this: [0005] A kind of unfired magnesia calcium carbon bric...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 徐袁琳金锋姚锦海姚建良
Owner PERFECT WORLD CO LTD
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