Heat storage material, preparation method and application thereof
A heat storage material, ferrous oxide technology, applied in heat storage equipment, heat exchange materials, lighting and heating equipment, etc., can solve the problems of small heat storage, low volume density, slow heat transfer, etc., and achieve large heat storage , the effect of excellent performance indicators
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[0027] A method for preparing heat storage materials, the method is to combine non-ferrous metal smelting and smelting slag composition control, control the smelting slag composition, reaction process and mineral composition, control the cooling treatment of the slag, and then crush it , crushing, grinding, and through batching, kneading, molding, drying and firing processes to make checker bricks for regenerators.
[0028] The non-ferrous metal smelting in the present invention refers to the smelting of non-ferrous metal copper, and the process of matte smelting-copper matte blowing is used to process the copper sulfide concentrate. The principle of this process is that the affinity of copper to sulfur is greater than that of iron and some impurity metals, and the affinity of iron to oxygen is greater than the physical properties of copper. Under the conditions of high temperature and controlled oxidation atmosphere, the impurity metals such as iron are gradually oxidized and ...
Embodiment 1
[0039] Step 1. Selection of raw materials for slag composition adjustment, pretreatment and control of slag composition: use SiO 2 %=99.07, Al 2 o 3 %=0.29, Fe 2 o 3 % = 0.41, CaO% = 0.23 silica, the silica raw material is washed with drum sieve;
[0040] Step 2, smelting reaction process and mineral composition control: Copper ore is smelted using the copper matte smelting process, the smelting temperature is 1280°C, and the oxidizing atmosphere is controlled for smelting; the converted result of the composition of the copper smelting charge is (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=1:1.9 ratio calculation, 25.67kg of Fe converted to FeO is 33.02kg, need to add 17.38kg of silica. Remove the original 9.68kg of SiO 2 , another 7.77kg of silica is needed. The main component test before the slag furnace: the content of silicon oxide is 27.84%, the content of ferrous oxide i...
Embodiment 2
[0048] The differences between this embodiment and Embodiment 1 are:
[0049] Step 2: According to SiO 2 : Calculated by the ratio of FeO=1:2.1, 25.67kg of Fe is converted to 33.02kg of FeO, and 15.72kg of silica needs to be added. Remove the original 9.68kg of SiO 2 , need to add another 6.04kg of silica. The main component test before the slag furnace: the content of silicon oxide is 27.11%, the content of ferrous oxide is 61.89%, the content of iron oxide is 2.37%, the content of copper oxide is 2.26%, and the balance of other components is 6.37%. Step 5, preparation of lattice bricks. The particle size distribution is in accordance with the ratio of 1~3mm: 0~1mm: fine powder = 60:10:30, plus 2% potassium feldspar fine powder as sintering agent. Load the kiln car and heat it at 1200°C for 2 hours for firing.
[0050] The physical and chemical indicators for checking checker bricks are as follows: bulk density 4.10g / cm 3 ,The thermal conductivity at 1000°C is 5.81w / m.k...
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