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Unshaped refractory material and preparation method thereof

A technology of refractory materials and granules, which is applied in the field of refractory materials, can solve problems such as difficult adjustment, poor mud beating work, and easy hardening of gun mud.

Inactive Publication Date: 2015-09-30
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, tar is used as the binder of the clay, so that the clay has plastic operation performance, and can also be polycondensed and carbonized as the temperature rises, forming a carbonized network, and improving the high-temperature strength and wetting angle of the clay. However, , as long as tar is heated, it will release a large amount of benzo(a)pyrene, which is a strong carcinogen and extremely harmful to the environment and the health of the staff. At the same time, the gun clay produced by tar is easy to harden at normal temperature And difficult to adjust, poor plasticity, it is not easy to carry out mud work, affecting the workability of mud at the iron hole

Method used

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Embodiment Construction

[0012] The present invention mainly discloses a monolithic refractory material and its preparation method. Unless otherwise specified, the basic materials and preparation methods used therein should be well known to those skilled in the relevant technical field. The composition of the shaped refractory is fully described, and the description is given first.

[0013] The invention provides an unshaped refractory material, which comprises the following components: magnesia particles account for 5% to 30% by weight, lightly burned magnesium powder accounts for 5% to 15% by weight, corundum accounts for 20% to 45% by weight, carbonization Silicon accounts for 10% to 20% by weight, coke accounts for 10% to 18% by weight, clay accounts for 6% to 12% by weight, ferrosilicon nitride accounts for 2% to 8% by weight, and benzo(a)pyrene is low The graphitizable coal tar pitch at 500mg / kg accounts for 3%-10% by weight, and the aromatic hydrocarbon solvent with benzo(a)pyrene less than 500...

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Abstract

The invention provides an unshaped refractory material and a preparation method thereof. The unshaped refractory material contains the components in parts by weight: 5-30% of magnesia particles, 5-15% of caustic-burned magnesia powder, 20-45% of corundum, 10-20% of silicon carbide, 10-18% of cokes, 6-12% of clay, 2-8% of ferro-silicon nitride, 3-10% of graphitisable coal tar pitch and aromatic hydrocarbon solvents. The preparation method comprises the steps of mixing the magnesia particles, the caustic-burned magnesia powder, the corundum, silicon carbide, the cokes, the clay, ferro-silicon nitride and the graphitisable coal tar pitch according to a certain proportion; and then, grinding and mixing after adding the aromatic hydrocarbon solvents to obtain the unshaped refractory material.

Description

【Technical field】 [0001] The invention relates to the field of refractory materials, in particular to an unshaped refractory material and a preparation method thereof. 【Background technique】 [0002] Unshaped refractories can also be called bulk refractories. Compared with refractory bricks, they have the characteristics of simple process (saving the firing process), energy saving, low cost, and convenient mechanized construction. Among them, unshaped refractories have a very The largest use, that is, the taphole clay used in the blast furnace, the currently widely used blast furnace taphole clay belongs to Al 2 o 3 -SiO 2 - SiC-C based materials. Among them, Al 2 o 3 and SiO 2 The reasonable combination of components can react mullite at high temperature, so that the clay has good corrosion resistance and a suitable softening point under load, which is the key factor affecting the service life of the clay; SiC is a raw material for high temperature wear resistance , ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/632
Inventor 郑旗赵希娟范咏莲钱雷
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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