Method for producing calcium sulphide with gypsum, sulfur-fixing agent and high-sulphur coal
A sulfur-fixing agent, high-sulfur coal technology, applied in the direction of magnesium/calcium/strontium/barium sulfide/polysulfide, etc., can solve the problems of poor economic benefit and high cost, achieve cost reduction, increase output, and easy production process control effect
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Embodiment 1
[0018] Raw material 1: Phosphogypsum
[0019] The main composition of phosphogypsum is shown in the table below:
[0020] components
[0021] Raw material 2: The content of calcium oxide is 93%
[0022] Raw material 3: high sulfur coal
[0023] Coal sample element analysis table%
[0024] C r
[0025] Mix high-sulfur coal and calcium oxide at a ratio of 1:0.08, and phosphogypsum and high-sulfur coal at a ratio of 1:0.21, add them to the circulating fluidized bed, keep the furnace temperature at 850-980°C, and keep the residence time for about 2 hours. After roasting, the finished product of coarse calcium sulfide is obtained. Calcium sulfide product conversion rate is 93.2%
Embodiment 2
[0027] Raw material 1: the phosphogypsum used is the same as in Example 1.
[0028] Raw material 2: The content of calcium carbonate is 96.3%.
[0029] Raw material 3: The coal sample elemental analysis of high-sulfur coal is the same as that in Example 1.
[0030] Mix high-sulfur coal and calcium carbonate at a ratio of 1:0.12, and phosphogypsum and high-sulfur coal at a ratio of 1:0.22, and send them into the rotary kiln. After roasting, the finished product of coarse calcium sulfide is obtained. The conversion rate of calcium sulfide product is 89.5%.
Embodiment 3
[0032] Raw material 1: the phosphogypsum used is the same as in Example 1.
[0033] Raw material 2: The content of calcium carbonate is 96.3%.
[0034] Raw material 3: The coal sample elemental analysis of high-sulfur coal is the same as that in Example 1.
[0035] Mix high-sulfur coal and calcium carbonate according to the molar ratio of fixed carbon in high-sulfur coal to calcium carbonate at a ratio of 1:3.5, and phosphogypsum and high-sulfur coal at a ratio of 1:0.24 and send them into the tunnel kiln to maintain the temperature in the high-temperature section 900-1150°C, the residence time is about 2 hours. After roasting, the finished product of coarse calcium sulfide is obtained. The conversion rate of calcium sulfide product is 91.3%.
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