Environment protection type energy-saving coombustion technique

An environment protection type energy-saving combustion technique for industrial furnce or kiln features that the heat accumulating body is used to preheat air to high temp and reduce the generation of NOx, realizing the low-oxygen combustion in high-temp condition. Its advantages include saving energy by 30-60%, decreasing the CO2 and SO2 exhaustion by 30-60%, and low level of exhausted NOx (0.03-0.003%).

Rotational flow distributor for high concentration powder-gas mixture

The present invention relates to a distribution equipment capable of uniformly distributing high-concentration powder-gas two-phase mixture (mixed ratio is above 29kg/kg) of single main pipe to several branch pipes, in particular, it is applicable to coal powder distribution before furnace in blast furnace oxygen-enriched blowing of high-concentration coal powder. Said invention consists of semi-spherical top cover, main cylinder body (including central hollow cylinder and vertical external cylinder) and disk base. Its inlet and outlets are in a horizontal direction, the inlet is placed in the lower portion of the vertical external cylinder in the form of tangential intake so as to make the introduced powder-gas two-phase mixture form a cyclanic flow-field, and its outlets are uniformly distributed in the form of radiation. Said equipment is made of high-strength wear cast-iron.

Technology for pretreating molten iron inshallow smelting bath by blowing Mg-base desulfurizing agent

A process for pretreating molten iron in ladle (30-100 tons) by blowing Mg-base desulfurizing agent includes adding calcium oxide and calcium fluoride to molten iron before tapping to control the basicity of top slags to be higher than 2 and FeO content to be lower than 3%, and spraying Mg-base desulfurizing agent under 0.2-0.4 MPa and 20-60 cu.m/h of nitrogen gas for 5-15 min by inserting the spray gun to 1-1.9 m in depth. Said desulfurizing agent contains Mg (15-18%), calcium oxide (15-80%) and calcium fluoride (1-10%). Its advantages are high Mg utilization rate (46-65%) and high desulfurizing rate up to 65-72%.

IMPROVED SMELTING TECHNOLOGY OF ELECTRIC FURNACE

... 利用旋流式煤氧枪强化电炉冶炼缩短冶炼时间，大幅度地降低电炉钢的电耗。根据电炉容量和冶炼温度采用１－３支旋流式煤氧枪，安装电炉壁上，呈一定的倾角和切向角，指向电炉内的低温区，亦可增设移动式旋流式煤氧枪置于操作炉门口。冶炼操作特点，在熔化期的初期和中期，可利用煤氧枪和电炉通电同时向炉内供热，也可单独采用煤氧枪供热。旋流式煤氧枪操作参数、煤粉量为０．５－１．５公斤／吨·分，供氧量为０．７－３标米3／吨·分。 ...

OXYGEN-FUEL BURNER FOR MELTING WASTE STEEL

The burner is suitable for heating and melting waste steel, the wall of the central fuel tube has a hole tube connecting to an inner casing oxygen tube, a cyclone device of outer annular casing and outer casing oxygen tube are mounted between the central tube and the inner casing tube, the mixing ratio of oxygen and fuel and the stiffness of flame are controlled by adjusting the cross-section ratios, i.e. adjusting the proportion among premixed oxygen, cyclone oxygen and direct flow cyclic oxygen, the ratios of cyclone oxygen and direct flow cyclic oxygen can be 2:8-6:4.

Method for pretreating molten iron inshallow smelting bath by blowing Mg-base desulfurizing agent

Vortex distributor for high concentration mixture of powder and gas