Nitrate-free environment-friendly cast iron enamel high-temperature acid-resistant ground coat and preparation method thereof
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An environmentally friendly, nitrate-based technology applied in the field of enamel
Pending Publication Date: 2022-04-19
SINOPIGMENT & ENAMEL CHEM
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[0012] One of the purposes of the present invention is to provide a nitrate-free environment-friendly cast iron enamel high-temperature acid-resistant underglaze for the above-mentioned environmental protection problems existing in the current traditional nitrate-containing enamel enamel without reducing the performance indicators of the product.
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Embodiment 1
[0040] (1) Weigh the raw materials according to the mass parts of the following components:
[0042] SiO in quartz 2 The mass proportion of ≥99.5%, SiO in potassium feldspar 2 The mass proportion of titanium dioxide is ≥71%, the mass proportion of titanium dioxide in titanium dioxide is ≥99.0%, the mass proportion of Co in cobalt oxide is ≥71%, and other raw materials are industrial-grade purity.
[0043] (2) Stir and mix the above raw materials evenly.
[0044] (3) Put the uniformly mixed material into the melting furnace, and melt it under the condition of pure oxygen, and control the melting temperature at 1290±10°C.
[0045] (4) After the above materials are completely melted, the borosilicate glass body is obtained, and the molten boros...
Embodiment 2
[0048] The preparation process of this embodiment and embodiment 1 is basically the same, the difference is:
[0049] The mass parts of each component in step (1) are: quartz 52kg, zero-water borax 25.5kg, soda ash 6.2kg, manganese oxide 1.6kg, cobalt oxide 0.8kg, calcium carbonate 5.0kg, sodium fluorosilicate 4.6kg, titanium dioxide 3.7kg, potassium feldspar 2.9kg, lithium carbonate 3.7kg.
[0050] In step (5), the process of rapidly cooling the melted borosilicate glass body is by tableting.
Embodiment 3
[0052] The preparation process of this embodiment and embodiment 1 is basically the same, the difference is:
[0053] The mass parts of each component in step (1) are: quartz 52kg, zero-water borax 24.9kg, soda ash 6.3kg, manganese oxide 1.6kg, cobalt oxide 0.8kg, calcium carbonate 5.0kg, sodium fluorosilicate 4.9kg, titanium dioxide 3.7kg, potassium feldspar 3.6kg, lithium carbonate 3.8kg.
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Abstract
The invention discloses a nitrate-free environment-friendly cast iron enamel high-temperature acid-resistant ground coat and a preparation method thereof, and belongs to the technical field of enamel, the formula comprises the following components by mass: 50-54 parts of quartz, 24-27 parts of anhydrous borax, 5-7 parts of sodium carbonate, 1.5-1.7 parts of manganese oxide, 0.7-0.9 part of cobalt oxide, 4.5-5.5 parts of calcium carbonate, 4-5 parts of sodium fluosilicate, 3.0-4.0 parts of titanium dioxide, and 2.0-3.8 parts of potassium feldspar. And 3.5 to 4.5 parts of lithium carbonate. The raw materials are uniformly mixed according to the proportion and are molten under the condition of pure oxygen at 1290 + / -10 DEG C, and the firing temperature of the finished product is 800-820 DEG C. The formula does not contain nitrate, and the major technical problem that in the production process of existing cast iron enamel high-temperature acid-resistant ground coat, nitrogen oxide (NOx) gas is generated and discharged to pollute the environment is fundamentally solved.
Description
technical field [0001] The invention belongs to the technical field of enamel, and in particular relates to a nitrate-free environment-friendly cast iron enamel high-temperature acid-resistant bottom glaze and a preparation method thereof. Background technique [0002] Enamel enamel is mainly composed of feldspar, quartz and other refractory raw materials, borax, sodium nitrate, potassium nitrate, soda ash and other fusible chemical raw materials, as well as characteristic raw materials such as non-ferrous metal oxides. They are mixed in a certain proportion, melted at high temperature, and rapidly cooled into granules or flakes. Shaped borosilicate glass bodies were prepared. [0003] The introduction of nitrates (sodium nitrate, potassium nitrate, etc.) into enamel glazes as oxidants and fluxes has become a consensus in the industry, and it is an indispensable raw material for enamel glazes in traditional enamel theory. So far, there is no safe, colorless, reasonably pric...
Claims
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