Volatile metal roasting retracting device
Technical field
The device that the present invention relates to a kind of roasting volatile metal mineral and effectively reclaim.
Background technology
In the non-ferrous metal mineral, contain easy oxidation mostly, the arsenic with fume emission of volatilization, plumbous, bismuth, zinc, antimony, elements such as indium, arsenic wherein, lead is noxious material, in the roasting smelting process, be discharged in the atmosphere with flue gas, can cause serious environmental to pollute, in the humidifying smelting process of non-ferrous metal, arsenic, lead is a kind of again to be difficult to handle, again product quality is caused heavy metal or the nonmetallic inclusion that has a strong impact on, to arsenic, though the waste residue of harmful substances such as lead is taked to the cement solidifies, mode such as buried is handled, and can immerse equally in soil and the underground water, causes environmental pollution, and arsenic, plumbous, bismuth, zinc, antimony, elements such as indium all are useful elements, with fume emission or buried, not only cause environmental pollution, also caused the waste of resource.The equipment that present domestic external enwergy comprehensively reclaims the volatile metal does not also appear in the newspapers and leads, and the arsenic retracting device all adopts two sections low temperature to reclaim both at home and abroad, as Sweden ripple Lipton Long Sikaer smeltery, first section high temperature is collected high molten gas metalliferous material, as Cu, Ni, Pb etc., second section low temperature gathers dust, and must pass through high-temperature region below 220~250 ℃ very soon, avoids being condensed into the glass blocking pipe; Canada Bel adopts bag collection and electricity to gather dust, and puts cold air flue-gas temperature is reduced to below 200 ℃, so that with AS
2O
3Collect, domestic also have put that reverberatory furnace handles into the arsenic flue dust is packed, but all exists the arsenic content of recovery low, processing speed is slow, the equipment complexity, the arsenic rate of recovery is low, and causes secondary pollution easily.
Summary of the invention
The objective of the invention is to disclose the suitable multiple volatile metal mineral roasting of a kind of energy and can effectively reclaim multiple volatile metal, simple in structure, the rate of recovery is high, do not cause the volatile metal roasting retracting device of environmental pollution.
Technical solution of the present invention is: a kind of volatile metal roasting retracting device, its special character is to be provided with closed fuel oil roaster, behind closed fuel oil roaster, be connected with meal dirt settler with offgas duct, the middle part of meal dirt settler or on the lower side portion be provided with the cold air jet pipe, its top is provided with the blast pipe of inwardly stretching, at least be connected with one-level volatile metal recovery device behind the blast pipe, the volatile metal recovery device is provided with the water-cooled storehouse, below the water-cooled storehouse, be provided with recovery bin, blast pipe inserts recovery bin by the water-cooled storehouse, with " n " shape pipe UNICOM, afterbody volatile metal recovery device is provided with the blast pipe that connects its recovery bin between the recovery bin of adjacent two volatile metal recovery devices.
Closed fuel oil roaster in the technology of the present invention solution, be provided with roasting body of heater, Lu Tang, blanking device, be provided with jet and atomizer in the left side of roasting body of heater, be provided with two firebreaks in the stove hall, be provided with rotating crawler type roasting plate between two firebreaks, crawler type roasting plate extends to outside the stove hall, the port of export below of crawler type roasting plate is provided with the grog bucket, also is provided with temperature sensor in the stove hall.
The present invention is owing to adopted above technical scheme, the multiple mineral material that contains the effumability metallic element of energy roasting, particularly require first dearsenification, lead, bismuth, zinc, antimony, indium, refine other metal again, the metal that roasting can be evaporated is reclaimed step by step by the cooling sedimentation; Because adopt closed fuel oil roaster, the tail gas dustiness is few, the impurity content of the volatile metal powder product that is reclaimed is few; For should not be more suitable, can the extraction of other metal not impacted with the mineral of coal fuel baking; Adopt the fuel oil roaster, can control effectively, realize the controlled recovery of different volatile metals sintering temperature; The present invention not only makes the simplification that becomes of harmful elements such as the arsenic that is difficult in the non-ferrous metal metallurgy to handle, lead, the more important thing is and fundamentally solved the problem of harmful element by flue gas and waste sludge discharge, prevent pollution to environment, simultaneously, harmful element and other volatile metal are reclaimed, turn waste into wealth, improved the utilization rate of resource.
Description of drawings
Accompanying drawing 1 is looked schematic diagram for master of the present invention.
Accompanying drawing 2 is the schematic top plan view of the closed fuel oil roaster of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing, a kind of volatile metal roasting retracting device, be provided with closed fuel oil roaster [11], meal dirt settler [17] and volatile metal recovery device [19-1], closed fuel oil roaster [11] is provided with body of heater [3], stove hall [13], be provided with jet [2] and atomizer [1] in body of heater [3] left side, in the stove hall, be provided with two firebreaks [12], between two grades of walls with flues [12], be provided with rotating crawler type roasting plate [5], the crawler belt moving runner is installed in firebreak [12] inboard, one side of firebreak [12] and crawler type roasting plate [5] extends to outside the body of heater [3], and drive motors [4] is housed.Top front end at body of heater [3] is provided with blanking device [6], also can be located at the side of body of heater [3], top front end at body of heater [3] is provided with blanking hole [10], the quantity of blanking hole [10] can be established 1~4, generally establish 2-3, blanking hole [10] correspondence is provided with tremie pipe [9], and tremie pipe [9] communicates with the mineral hopper [8] that is provided with blanking vibrator [7], below the outside of crawler type roasting plate, be provided with grog bucket [30], in Lu Tang [13], be provided with temperature sensor [29].Export a side at roaster tail gas and be provided with meal dirt settler [17], link to each other with offgas duct [11], middle part in the meal dirt settler [17] or on the lower side portion be provided with cold air jet pipe [16], cold air jet pipe [16] can be symmetrical in meal dirt settler [17] center and be provided with, at least two of quantity, the present embodiment symmetry is established 3-4, the nozzle hole direction is the furnace wall of meal dirt settler [17] vertically, also can downward angled setting, present embodiment is to be parallel to the furnace wall to be provided with, the neglecting designing requirement greatly of cold air jet pipe and deciding, principle is to guarantee that the cold air that is sprayed can make the exhaust temperature of roaster by being dropped rapidly to more than 500 ℃ about 250 ℃, the diameter of present embodiment design is 10cm, top in meal dirt settler [17] is provided with the blast pipe of inwardly stretching [18], blast pipe [18] upwards bends up after can vertically passing meal dirt sedimentation wall [27] from the side, also can extend internally from the top, and present embodiment is the former.Be provided with the meal dirt outlet [15] of band door in the bottom of meal dirt settler [17], in the meal dirt settler [17] temperature sensor [28] can be set.At least be connected with one-level volatile metal recovery device [19-1] behind the blast pipe [18], volatile metal recovery device [19-1] is provided with water-cooled storehouse [21], be provided with recovery bin [26] in water-cooled storehouse [21] below, the bottom of recovery bin [26] is provided with the feed opening [24] of belt switch, blast pipe [18] passes every pulling [25] by water-cooled storehouse [21] and inserts recovery bin [26], at adjacent two volatile metal recovery devices [19-1], link to each other with " n " shape pipe [20] that is communicated with its recovery bin between [19-2], the recovery bin of level volatile metal recovery device (present embodiment is meant [19-2], if establish 5 grades of volatile metal recovery devices then be meant [19-5]) is not connected with the external blast pipe [22] of continuous equipment down.Every 1-2 level volatile metal recovery device reclaims a kind of volatile metal, by the control chilling temperature different volatile metals is deposited in the different volatile metal recovery devices.
Present embodiment can be suitable for containing the roasting of the mineral of volatile metals such as arsenic, lead, antimony, bismuth, zinc, indium, and it is effectively reclaimed, and is simple in structure, rate of recovery height, make poisonous metal can obtain recycling, change changes treasured into, the more important thing is to have solved the pollution problem of harmful element to environment.Simultaneously to the processing of volatility harmful elements such as non-ferrous metal metallurgy arsenic, the lead simplification that becomes.This enforcement side is to roasting volatility and the rate of recovery such as the following table of several volatile metals:
The volatile metal title |
Rate of recovery % |
Reclaim tenor |
The roasting volatility |
Exhaust emissions content mg/m
3 |
Arsenic trioxide |
90-98 |
80-95 |
99.5 |
≤10 |
Zinc oxide |
95-98 |
97-98 |
98-99 |
≤100 |
Antimony oxide |
95-98 |
70-98 |
98-99 |
≤100 |
Lead oxide |
80-95 |
70-95 |
99-99.5 |
≤20 |
The indium cobalt/cobalt oxide |
≥90 |
70-95 |
96-98 |
≤20 |