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Novel magnesium-calcium gunning ramming material and preparation method thereof

A technology of magnesia-calcium and ramming material, which is applied in the field of refractory materials, can solve the problems of no scale industrial application, etc., and achieve the effects of reducing hydration erosion, solving production and construction, and high service life

Inactive Publication Date: 2020-01-31
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The unshaped refractory material is called a new generation of refractory material, which has the advantages of energy saving, low consumption, and simple process. Magnesium-calcium hydrate coatings and magnesium-calcium gunning materials for ladles are only partially used in my country, and there is no large-scale industrial application

Method used

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  • Novel magnesium-calcium gunning ramming material and preparation method thereof
  • Novel magnesium-calcium gunning ramming material and preparation method thereof

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preparation example Construction

[0066] A preparation method of a novel magnesia-calcium gunning and ramming material, comprising the following steps: calcined iron-rich dolomite sand aggregate 53%-70%, dead-burned magnesia aggregate 0%-11.7%, heavy-burned Magnesia fine powder 13.4%-20.6%, organic binder 0.1%-0.3%, CaF 2 0.3%-1.5%, Na 2 CO 3 0.5%-2%, silicon micropowder 0.5%-1%, and inorganic salt binder 10% are evenly mixed to obtain a new type of magnesium-calcium gunning ramming material.

[0067] The novel magnesium-calcium gunning ramming material is a semi-dry gunning material.

[0068] When in use, put the mixture into the gunning machine, the gunning material and water are sprayed out from the spray gun at the same time, and mixed at the gun mouth, then the gunning construction or ramming construction in the mould.

[0069] Calcined iron-rich dolomite sand aggregate is a good metallurgical auxiliary material in the iron and steel smelting process. It is not only a slagging agent, but also a desul...

Embodiment 1

[0073] According to the demand and technical conditions of steelmaking electric furnace, according to the percentage, the formula data is adopted, calcined iron-rich dolomite sand aggregate: 1-5mm 60%, 0-1mm 10%, dead-burned magnesia aggregate: 0-1mm 5% , Dead burnt magnesia fine powder: 0-0.074mm13.4%, organic binder (PT-10) 0.1%, CaF 2 0.5%, Na 2 CO 3 0.5%, silica powder 0.5%, inorganic salt binder 10%. After mixing evenly, a new type of magnesia-calcium semi-dry electric furnace gunning material is made.

Embodiment 2

[0075] According to the demand and technical conditions of the steelmaking converter, according to the percentage, the formula data is adopted, calcined iron-rich dolomite sand aggregate: 1-5mm 60%, dead-burned magnesia aggregate: 0-1mm 11.7%, dead-burned magnesia Fine powder: 0-0.074mm15%, organic binder (PT-10) 0.3%, CaF 2 1%, Na 2 CO 3 1%, silicon powder 1%, inorganic salt binder 10%. After mixing evenly, a new type of magnesium-calcium semi-dry converter gunning material is made.

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Abstract

The invention belongs to the technical field of refractory materials, and particularly discloses a novel magnesium-calcium gunning ramming material and a preparation method thereof. The novel magnesium-calcium gunning ramming material is prepared from the following raw materials in percentage by weight: 53%-70% of calcined iron-rich dolomite sand aggregate; 0%-11.7% of dead-burned magnesite sand aggregate, 13.4%-20.6% of dead-burned magnesite sand fine powder, 0.1%-0.3% of an organic binding agent, 0.3%-1.5% of CaF2, 0.5%-2% of Na2CO3, 0.5%-1% of silica powder and 10% of an inorganic salt binding agent. According to the prepared magnesium-calcium gunning ramming material, the defect that water cannot be added into a high-calcium alkaline refractory material is avoided, not only the furnacelining service life is prolonged, but also dephosphorizing and desulfurizing effects are achieved, traditional electric furnaces, converter gunning materials, steel ladle backing materials, back seammaterials and ladle mouth materials can be replaced, and the limit that only pure magnesium or aluminum materials can be used is broken.

Description

technical field [0001] The invention relates to a novel magnesium-calcium gunning and ramming material and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Magnesium-calcium refractory materials have good high temperature resistance, slag resistance, thermal shock resistance, stability under high temperature vacuum and the function of purifying molten steel. They are the first choice refractory materials in the production of clean steel smelting. Magnesia-calcium refractories also have the advantages of low value and environmental protection, and are the best substitute materials for magnesium-chromium refractories. With the rapid development of the iron and steel industry and the improvement of the performance of refractory products, the application of magnesia-calcium refractory materials will become more and more extensive. [0003] my country has rich reserves of dolomite and magnesite, with high purit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/06C04B35/66
CPCC04B35/06C04B35/66C04B2235/3206C04B2235/445C04B2235/442C04B2235/3418C04B2235/5427C04B2235/448C04B2235/447C04B2235/3427C04B2235/96C04B2235/77C04B2235/9607
Inventor 崔学正崔申金耀东苏德华姜永生
Owner LIAONING ZHONGMEI HLDG