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A kind of bauxite frit and preparation method thereof

A technology of bauxite and frit, which is applied in the field of high-temperature structural materials, can solve the problems of reduced slag resistance, unstable volume, and low bulk density, and achieve the effects of simplifying the production process, improving production efficiency, and low porosity

Inactive Publication Date: 2016-05-18
HENAN HONGRAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem in use is that when the alumina content of the raw material is not up to the standard, the alumina powder is mixed in, and the performance of the raw material is not as good as that of the natural bauxite clinker of the same brand; the product has a low volume density, and the volume is unstable after calcination. Shrinkage, resulting in cracks between subdivisions and particles, separation of subdivisions and particles, decreased slag resistance, and reduced service life

Method used

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  • A kind of bauxite frit and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Embodiment 1: The electric furnace used in this embodiment is a dumping furnace, the rated power of the electric furnace is 22500KW, and the rated capacity of the electric furnace is 20 tons. refer to figure 1 , the preparation process of this embodiment is:

[0033]Step 1: Lightly burn the preferred bauxite raw material in a shaft kiln at 1020°C until the dehydration rate of the raw material is greater than 99.5%. The raw material after light burning is crushed by a jaw crusher, passed through a 15mm sieve, and the bauxite after light burning is detected The chemical composition of raw materials is (wt%): SiO 2 : 2.28, Al 2 o 3 : 92.04, Fe 2 o 3 : 0.51, CaO: 0.18, MgO: 0.14, K 2 O: 0.10, Na 2 O: 0.02, TiO 2 : 4.10, burning reduction: 0.63;

[0034] Step 2: Put the crushed light burnt material into the electric furnace without adding any additives for smelting. Arc carbon rod, the electrode is lowered and connected to the arc starting carbon rod, and then add ...

Embodiment 2

[0039] Embodiment 2: The electric furnace used in this embodiment is a dumping furnace, the rated power of the electric furnace is 22500KW, and the rated capacity of the electric furnace is 20 tons.

[0040] refer to figure 1 , the difference between this embodiment and Embodiment 1 is:

[0041] Step 3: After the smelting is completed, pour the melt in the electric furnace onto the condensing pan. The lower part of the condensing pan has a water-cooled tube. The capacity of the condensing pan is 16 tons (referring to the melt carrying capacity). Above 50°C, the flow rate of water in the water-cooling tube is not less than 3t / h, the cooling cycle is 18 hours, and the surface temperature of the frit is 800°C after 5 hours and 50 minutes, which prevents the decomposition of aluminum titanate (aluminum titanate is at 800-1280°C decompose in the temperature range).

[0042] According to the B product prepared by the process of Example 2, its physical and chemical indicators detec...

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Abstract

The invention discloses a bauxite clinker and a preparation method thereof. The clinker comprises aluminum oxide and mineral components, wherein the mineral components comprise corundum and aluminum titanate. The preparation method of the bauxite clinker comprises the following steps: 1 carrying out light roasting on an excellent bauxite raw material; 2 smelting, crushing the lightly roasted raw material in the step 1 into 0-15mm of particles, and smelting the crushed raw material; and 3 cooling, cooling the smelted melt to below 800 DEG C at a certain speed. No additive is added, so that the method only comprises a natural high-quality bauxite smelting-solidifying physical process; and the raw material does not contain carbide which can be decomposed in water, so that the problem of particle pulverization of brown fused alumina or bauxite-based corundum in water is solved; compared with fused white corundum, the porosity of the bauxite clinker is much lower than that of the fused white corundum; and the product produced by the bauxite clinker is high in compactness and low in porosity.

Description

technical field [0001] The invention relates to the industry of high-temperature structural materials, in particular to a bauxite frit used in the production of refractory products and a preparation method thereof. Background technique [0002] In 2014, Henan Hongran Aluminum Co., Ltd. established the research project "Development and utilization of high-quality bauxite in the east section of Jiajiawa, Mianchi, Henan", and entrusted Xi'an University of Architecture and Technology to complete it. The Jiajiawa East Mine in Mianchi, Henan is a high-quality bauxite ore in Asia, with a maximum alumina content of 93%-94%, an iron oxide content of less than 1%, and a combined potassium oxide and sodium oxide content of less than 0.2%. High-quality scarce resources with aluminum, low iron, low potassium and sodium content, and raw ore with alumina content greater than 90% account for a relatively high proportion. [0003] my country is a major producer of refractory materials, with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 张红伟高云琴
Owner HENAN HONGRAN ALUMINUM
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