SU990665A1 - Process for concentrating carnallite - Google Patents

Description

The composition of the determining components of the halite sediment,% (average) NaCt88, 5; CaSO 2,1) - 1,7. In order to achieve the required quality of enriched carnallite, halite is preliminarily classified in order to isolate an optimal fraction with a smaller amount of harmful impurities (CasO) and a large amount of NaCe. The classification is carried out on double-deck screens or a cascade of two meadow sieves. In the process of classification, a class of 0.52.0 ohms is isolated and uniformly dosed into a thickener or into a bag before filtering enriched carnallite. The amount of halite precipitate is introduced depending on the desired NaCB content and is determined by calculation.

The process of obtaining enriched .. carnallite is carried out as follows.

The ore from the bunker is fed to the dissolution, where the hot pacTBO hydration is delivered. Saturated clarified liquor then enters the vacuum crystallization unit (ICU), and the halite precipitate enters the sump. From the sump, the slurry is pumped by pump to a cascade of sieves and subjected to classification. From the No. 1 sieve, where the classification according to the class of 2 mm occurs, the preferred product is fed to the sieve 2, where the classification according to the class of 0.5 mm takes place. Classes of +2 mm and -0.5 mm are combined and fed to a plan filter for filtration, and then the classified material is sent to the dump. (+0.5 mm) through the dispenser is fed into the mixer (or thickener) together with carnallite pulp to reduce the content of sulfate ion in the finished product. With an upstream flow rate of 1.7 m / h in the thickener, it is possible to reduce the calcium sulfate content to 0.06%. Carnallite pulp after VKU is fed for thickening, and then into a mixer where it is mixed with races with a classified halite dump. The product is then fed to the center of the reef for filtration into the warehouse of finished products. In this case, an increase in the yield of the finished product is provided; product by 0, b% and, therefore, increases the commodity and extraction of the useful component from. ores, since from each ton of halite dump, 28.7 kg are additionally added to the finished product, which was lost in the presence of existing technology. An example of calculation. The amount of additives in the production of enriched carnallite with a high content of sodium chloride.

First option. Production of enriched carnolite with 7% sodium chloride in it.

In tab. 1 shows the initial data for the calculation.

The yield of enrichment carditall is taken as a condition - 100 t / h.

Determine how much halite sludge will need to be added in order to provide the required content in the gto product by NaCP

0.8838X + 3 (100 + X) X 0.06

0.8838X - 0.06X 6-3

0.8238Х ЗХ 3,6ci4 In order to ensure the guaranteed retention of NaCp 6%, we take in the input of the dump in the amount of 4 tons per 100 tons of boiled product. Content M C7 i J-2 92 ± -i22- - & i - 104 31,9148 ,,) cQ

- - 104.

where 0.0287 is the MoCfg content in the alite precipitate of the cells. . (- 2 + 0.5 mm) the proportion of units.

CaSO% content,

4 X 0,0119 + 100. Ol227b 0.075%, where 0,0110 is the content of eaSO in the halite sediment of cl. (-2 + 0.5 mm). Thus, with the addition of 4 tons of classified halite sediment class (-2 + 0.5 mm), the content in enriched carnallite Nace 6%, M (, CaSOi 0.075%. The second option. Getting enriched carnallite with sodium chloride content in it. In Table 2 shows the initial data for the calculation.The yield of enriched carnallite is taken conditionally as 100 t / h. 0.8838X - 0.07X 7-3 0.8138X 4X 4.9 "To ensure guaranteed 7% of the content of MaSv is accepted as input of the dump in the amount of 5 tons per 100 tons of finished product.At the same time, the content,%: 5 + 100 -, -105, | (-2 + 0, 5 mm) loli units

Content of Ca5O4 g

, 100 0.0003 /

105

. 0. „d. 105,

where 0,0119 - the content of CaS04 in halite sediment CL. (-2 0.5 mm). Thus, with the addition of 5 tons of classified halite mineral grade (-2 + 0.5) mm, the security is 906656

 content in enriched carnallite

MCE 7%, MtjCe, 30%, CaSO4 0.085%. . According to the calculations of the consumer from the use of carnallite with a high content of sodium chloride, the economy is about 10 rubles. per ton of magnesium by reducing specific energy consumption and reducing

10 costs for gas purification from harmful impurities.

Table 1

HaSe 88.38 CaS04 1.19 MgCBj 2.87

Claims (2)

Claims of an enlarged cargenshlite method, including dissolution of ore, separation of halite sediment, crystallization of river & t, condensation and filtration, characterized in that in order to increase the content of chloride in carnallite, a fraction with particle size 0 , 5-2.0 Ohm and injected before filtering into carnallite. table 2 NaCe 3 CaSO4 .0,03 HgCli 31.8 Sources of information taken into account in the examination 50 1. USSR author's certificate No. 278654, cl. C 01 F 5/30, 1968. 2. Report of the Uryoshka branch of the All-Union Scientific Research Institute of Halurgy. Getting car55 nallita with elevated sodium chloride content. Perm-Bereznki ki, 1980 (prototype).