CN1283589A

CN1283589A - Process for preparing potassium nitrate and sodium nitrate from nitrate-type solid-liquid ore

Info

Publication number: CN1283589A
Application number: CN 00118905
Authority: CN
Inventors: 康殿祥; 赵兴森
Original assignee: CHANGTUO ARCHITECTURAL CHEMICALS Co Ltd SHANSHAN
Current assignee: CHANGTUO ARCHITECTURAL CHEMICALS Co Ltd SHANSHAN
Priority date: 2000-06-14
Filing date: 2000-06-14
Publication date: 2001-02-14

Abstract

A proces for preparing potassium nitrate or sodium nitrate from nitrate-type solid or liquid ore includes evaporating raw bittern in class-1 salina, crystallizing to remove sodium salt, evaporating in class-2 salina to educe out mixed sodium salt, evaporating in class-3 soline to obtain semi-finished nitrate, recovering residual liquid in class-2 salina, heating and floatating the mixed sodium salt to remove SO4 ions, and refining the semi-finished nitrate to obtain potassium nitrate or sodium nitrate. For the solid ore, the process includes stacking ore, spraying water and collecting extracted liquid. Its advantages are low energy consumption and high output.

Description

Produce the method for saltpetre, SODIUMNITRATE with nitrate type solid, liquid body ore deposit

The present invention relates to sodium, potassium or general alkali-metal nitrate, relate in particular to nitrate type natural mineral and produce saltpetre, SODIUMNITRATE.

Utilizing natural mineral to produce in the traditional method of saltpetre, SODIUMNITRATE, the technology that often adopts dissolving or extraction, evaporative crystallization to re-refine, because complex process often relates to a large amount of production units, and the cost height, especially do not fit into the low mineral of effective content.The exploitation utilization ratio of low grade potassium nitre, sodium nitre and nitrate bittern mineral is not high at present.Edit by force by Zhou Lianjiang, happy will, " the 1057th page of technical process of having put down in writing extraction saltpetre from the kentite stone ore of inorganic chemicals industry handbook (second edition) first volume that Chemical Industry Press publishes, its step comprise with ore dissolving, clarification remove slag, evaporation, deslagging etc., wherein the dissolved temperature is 50-60 ℃, the heat energy that consumes in dissolution process is huge, and produce a large amount of mud in when clarification, the desilting difficulty that removes slag, workload is big.

The object of the present invention is to provide and a kind of niter, sodium nitre and nitrate type bittern are exploited utilization, the simple and easy method of processing saltpetre, SODIUMNITRATE.

The technical solution used in the present invention is following processing step:

A, produce the thick bittern of nitrate type, thick halogen injects nature beach, one-level salt pan and shines, at NO ₃ ^-Mother liquor changed b over to when content was 180-250g/L;

Shine to NO on b, nature beach, secondary salt pan ₃ ^-Mother liquor changed c over to when content was 270-350g/L, and xln enters h;

C, nature beach, three grades of salt pans are shone and are generated NO ₃ ^-With K ⁺Amount is greater than 50% work in-process, and residual halogen reclaims and enters b;

D, work in-process are made with extra care, and generate qualified saltpetre, SODIUMNITRATE.

H, be heated to 50-90 ℃ of flotation separation and obtain sodium salt crystal, mother liquor changes c over to;

The described bittern of method of producing thick bittern for directly extracting underground nitrate brine deposit or producing by niter, sodium nitre, wherein the method for producing bittern with niter, sodium nitre is that ore is piled up, the leaching of mist water spray, collect leach liquor, adding among the described step h that the temperature of hot flotation is more excellent to be 60-70 ℃, is the best with 70 ℃.

Use present method to produce saltpetre, SODIUMNITRATE, can select geology Stability Analysis of Structures, the suitable withered naturally salt pan of area nearby, remove the exposed salt deposit of water-in, land waste, find out comparatively complete lithostratigraphy or Quaternary system clay and give water layer, make antiseepage, drain process, play the dam, the one-level salt pan is made in smooth compacting bottom surface, made full use of the solar wind-energy natural resources, can finish operations such as system halogen, branch halogen near mineral are preserved ground, the production and transport cost reduces greatly; Produce thick bittern with spray lixiviation method, the ore yield can reach more than 90%; According to the phasor of 25 ℃ in nitrate, divide three grades of salt pans to carry out branch halogen, and the crystallisate in secondary salt pan has been carried out heat melt flotation, make wherein NO ₃ ^-Enrichment all is recovered and enters three grades of salt pans once more, and the residual halogen in three grades of salt pans continues to be recovered and enters the secondary salt pan, and the yield in score halogen stage can be reached more than 80%, produces by products such as sodium sulfate simultaneously.

Use the comprehensive yield of this method ore to reach more than 60%.NO ₃ ^-With K ⁺Content is greater than in 200 yuan of the production costs per ton of the work in-process more than 50%, and the consumption coal is less than 200 kilograms, and ten thousand tons of industrial scales investments are only 1,500 ten thousand yuan.This method is particularly suitable for the exploitation utilization of low-grade nitric acid salt mine.

Embodiment 1

Accompanying drawing 1 is the process flow sheet of present embodiment

As Fig. 1, after pile up in nitrate solid ore deposit, the mist spray, leaching makes the thick bittern of nitrate, and thick bittern injects the one-level salt pan, and natural beach is shone and is evaporated to NO ₃ ^-Mother liquor changed the secondary salt pan over to when content was 240g/L, and the one-level salt pan obtains purity and reaches 95% sodium-chlor crystallization; The secondary salt pan is continued the nature beach and is shone to NO ₃ ^-Mother liquor changed three grades of salt pans over to when content was 300g/L, and secondary salt pan crystallisate is the sodium mixed salt based on darapskite, wherein NO ₃ ^-With K ⁺Content is 10-33%, and the sodium mixed salt adds hot flotation, and temperature is 60-70 ℃, taking the method for Fractional Collections to obtain purity respectively is 98% sodium-chlor and based on the vitriol work in-process of 85% sodium sulfate, mother liquor enters three grades of salt pans, and three grades of salt pans are continued the nature beach and shone evaporation, until obtaining NO ₃ ^-With K ⁺Content is 50% work in-process, and residual halogen reclaims and enters the secondary salt pan, and work in-process are transported to refining workshop, as required trim K ⁺, obtain saltpetre, or directly obtain the SODIUMNITRATE finished product.Using the comprehensive yield of this method ore is 60%.

Used one-level salt pan is near select the constitutionally stable area of geology suitable mineral storage ground withered naturally salt pan in the present embodiment, remove the exposed salt deposit of water-in, land waste, find out comparatively complete lithostratigraphy or Quaternary system clay and give water layer, make antiseepage, drain process, play the dam, make smooth compacting bottom surface.

Embodiment 2 is nitrate liquid ore deposit with the different raw materials that adopt that are of implementing 1, directly extracts and injects the one-level salt pan, and the temperature of flotation separation is 70 ℃.

Embodiment 1 all takes from Hami, Turpan Basin with the mineral that embodiment 2 is adopted, major ingredient is sodium-chlor, SODIUMNITRATE, sodium sulfate and calcium, magnesium, lithium, bromine etc., wherein the content of the solid ore deposit SODIUMNITRATE among the embodiment 1 is 3.5-32%, liquid ore deposit NO among the embodiment 2 ₃ ^-Content is at 0.4-3.5%.

Claims

1, a kind of method with nitrate type solid, liquid body ore deposit production saltpetre, SODIUMNITRATE the steps include:

C, nature beach, three grades of salt pans are shone and are generated NO ₃ ^-With K ⁺Content is greater than 50% work in-process, and residual halogen reclaims and enters b;

H, be heated to 50-90 ℃ of flotation separation and obtain sodium salt crystal, mother liquor enters c;

2, production method as claimed in claim 1 is characterized in that the described method of thick bittern of producing is for directly extracting the liquid ore deposit of subterranean nitrate bittern.

3, production method as claimed in claim 1 is characterized in that the described method of producing thick bittern for niter, sodium nitre solid mineral are piled up, and leach liquor is collected in the leaching of mist water spray.

4, as claim 1 or 2 or 3 described production methods, the temperature that it is characterized in that adding among the described step h hot flotation is 60-70 ℃.

5, production method as claimed in claim 4, it is characterized in that described one-level salt pan is for utilizing the nature salt pan of drying up, remove the exposed salt deposit of water-in, land waste, find out comparatively complete lithostratigraphy or Quaternary system clay and give water layer, do antiseepage, drain process makes.

6, as claim 1 or 2 or 3 described production methods, it is characterized in that described one-level salt pan is for utilizing the nature salt pan of drying up, remove the exposed salt deposit of water-in, land waste, find out comparatively complete lithostratigraphy or Quaternary system clay and give water layer, do antiseepage, drain process makes.

7, production method as claimed in claim 4 is characterized in that described temperature is 70 ℃.