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A kind of pre-synthesized silica brick mineralizer and preparation method thereof

A mineralizer and pre-synthesis technology, used in crucible furnaces, electric furnaces, rotary drum furnaces, etc., can solve the problems of unstable scale composition, impurity ferrous oxide, etc., and achieve excellent anti-oxidation performance, uniform distribution of iron content, The effect of high ferrous content

Active Publication Date: 2019-02-19
中钢洛耐(洛阳)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main problems of the iron scale lime milk mineralizer currently used: the one is that the composition of iron scale (rolled steel sheet) is unstable, including the content of impurities and ferrous oxide

Method used

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  • A kind of pre-synthesized silica brick mineralizer and preparation method thereof
  • A kind of pre-synthesized silica brick mineralizer and preparation method thereof
  • A kind of pre-synthesized silica brick mineralizer and preparation method thereof

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preparation example Construction

[0033] A preparation method of a pre-synthesized silica brick mineralizer. The method combines non-ferrous metal smelting and smelting slag composition control, controls the smelting slag composition, reaction process and mineral composition, and controls the slag cooling treatment. It is then ground and re-selected, and used as a mineralizer in the production of silica bricks.

[0034] combine figure 1 , the preparation method of described a kind of presynthesis silica brick mineralizer, comprises the following steps:

[0035] Step 1. Selection of raw materials, pretreatment and control of slag composition: the silica diluent used, SiO 2 %≥99, the silica raw material must be washed with water to reduce impurities such as loess and mountain belts; only add silica to the slag at the later stage of smelting to adjust the composition of the slag; using silica as a diluent and composition regulator can not only make the The generated matte and slag are easier to separate, and at...

Embodiment 1

[0043] Step 1: Selection of raw materials, pretreatment and control of slag components. Silica diluent used, SiO 2 %=99.07, the silica raw material is washed with drum sieve;

[0044] Step 2, smelting reaction process and mineral composition control. Copper matte smelting process is adopted, the smelting temperature is 1280°C, and the oxidizing atmosphere is controlled for smelting. The conversion results of copper smelting charge composition (per 100kg): Cu is 26.12kg, Pb+Ag+Zn=4.01kg, S is 31.24kg, Al 2 o 3 1.09kg, SiO 2 is 9.68kg and Fe is 25.67kg. According to SiO 2 : FeO=1:2.08 ratio calculation, 25.67kg of Fe converted to FeO is 33.02kg, need to add 15.88kg of silica. Remove the original 9.68kg of SiO 2 , need to add another 6.20kg of SiO 2 (i.e. silica); after smelting is completed, after the molten matte is separated from the slag, the composition test of the molten slag furnace: the total amount of aluminum oxide, titanium oxide, potassium oxide and sodium ox...

Embodiment 2

[0051] The difference between this embodiment and Embodiment 1 is: the iron in the copper ore raw material is converted into ferrous oxide, and silica is added to control the mass ratio of SiO 2 : FeO=1:1.9.

[0052] Pre-synthesized silica brick mineralizer composition test: by mass percentage, the total amount of solvents such as aluminum oxide, titanium oxide, potassium oxide and sodium oxide is 0.63% (the above four components in the flux each contain aluminum oxide 0.38% , titanium oxide 0.09%, potassium oxide 0.05%, sodium oxide 0.11%, the total flux is 0.63%), calcium oxide content 6.52%, silicon oxide content 27.98%, ferrous oxide content 60.94%, iron oxide content 2.03%, oxide The copper content is 0.62%, and the balance of other components is 1.28%. The theoretical iron silicate content in the slag is 85.95%. Comparative analysis results show that there is almost no difference with Example 1, and the product quality and performance are stable.

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Abstract

The invention discloses a pre-synthesized silica brick mineralizer and a preparation method thereof. The mineralizer components include silicon oxide, ferrous oxide, iron oxide, calcium oxide and other flux components; the method is to combine metal smelting with smelting slag Combined with composition control, control the composition, reaction process and mineral composition of smelting slag, and then apply it as a mineralizer in the production of silica bricks. The preparation method of the pre-synthesized silica brick mineralizer comprises the following steps: step 1, selection and pretreatment of raw materials; step 2, smelting reaction process and mineral composition control; step 3, cooling treatment of smelting slag; step 4, slag fine grinding and processing. Compared with the silica brick produced by the iron scale lime milk mineralizer, the pre-synthesized mineralizer of the present invention has low production cost, high conversion rate, low true density, small residual expansion, high strength and good thermal conductivity.

Description

technical field [0001] The invention relates to the industry of high-temperature structural materials, and relates to a preparation method of a mineralizer raw material used in the production of siliceous refractory products, in particular to a pre-synthesized silica brick mineralizer and a preparation method thereof. Background technique [0002] my country is a major producer of refractory materials, with an annual output of about 30 million tons, accounting for about two-thirds of the world's total output. The products are mainly silicon-aluminum and magnesia refractories, and silicon-aluminum products account for about 10-15% of the total production of materials. [0003] Silicon products refer to refractory products with a silicon oxide content of not less than 93% and tridymite and cristobalite as the main crystal phase. Silicon products are mainly used in linings of coke ovens, glass melting furnaces, hot blast furnaces and other thermal equipment. Since the maximum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/00C04B5/06C04B35/66C04B35/14C22B15/00
CPCC04B5/00C04B5/06C04B35/14C04B35/66C04B2235/3201C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3272C04B2235/3281C22B15/0028
Inventor 马立建薛群虎高云琴刘民生
Owner 中钢洛耐(洛阳)新材料有限公司
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