SU808370A1 - Method of sodium tungstate production - Google Patents

Description

The invention relates to the technology of inorganic substances, in particular to the production of sodium tungstate and can be used in the technology of processing tungsten concentrates.

A known method of processing scheelite concentrates by fusion with soda and quartz sand at a temperature of 700 ”825 ° C [1]. .

However, in the known method it is impossible to isolate the product from the melt.

The closest technical solution to the proposed one is a method of processing scheelite concentrates by alloying with soda and silica at a temperature of 1400-1500 ° C, including the separation of fusion products into two immiscible layers [2J.

The disadvantages of this method are the high temperature of the fusion process (1400-1500®С) and the high consumption of soda (165% of TNC).

The purpose of the invention is to lower the temperature * of the process, in which good stratification and high STO- ^{1 * * * *} • stump of conversion of tungsten concentrate to sodium fungstate, as well as a reduction in soda consumption, are maintained.

This goal is achieved by the fact that instead of quartz, the mixture uses sodium silicate glass - technical silicate block (module 1.80).

In this case, a mixture consisting of wills. framovogo concentrate, silicate blocks and soda, taken in the ratio of 1.0: 0.16 0.20: 0.38 - 0.40, melts at a temperature of 1000-1100 ° C for

hours

alloy A good separation of the products of laziness into two immiscible layers (silicate slag and tungsten melt), a high degree of conversion of tungsten concentrate to sodium tungstate (up to 97%) is obtained at a lower soda consumption (110-115% of TNC) compared to the known one. The resulting water-phramate melt is fluid and easily poured out of the crucible. Silicate slag contains not more than 4% W0j, while 1OO% Mh and F 6 98%> go into the slag $.

Example 1. 10.0 kg of gubnerite- ¹ concentrate composition, 66.9 / INR

17.79; CaO 3.50 ⁴ . Ms $ O, 16, 'S ^ 2.83f Reli s.zb'A ^ s ^ o.bb *, ^ 0.20; Nap 0.10 / S 1.19, P _a 0 _e 0.06'Rt> o, 65i 6 0.082 are crushed to a grain size of 0.15 mm and mixed with 1.6 kg of ground (up to 0.15 mm ) silicate block 'and 3.8 cells of soda (the ratio of components in the mixture, respectively, 1.0: 0.16: 0.38). The mixture is melted at a temperature of ¹ 1000-1100 ° C for 2 hours. Osuschestvlya. separate discharge of tungstate melt and silicate slag. The output of sodium tungstate is 59.1%

59.1 weight;% melt, content 410 ^ -

77.52%, recovery 96.55%. WOj content in slag is 2.84%, 'Example 2.10.0 kg of gheelite-containing gubernite concentrate,% 63.56,' KttO 15.08 ', CoU 5.019 (3.64, ^g

N0 _g 1.82? АМЧ 0.63) .Р &, 0 * 5.84, * ΚίξΟ 0.14? H " _a 0.12) 1 ^ 00/20) 5 ^ 0.92 / Pb0.68; 8 0.06 is crushed, to * grain size -0.15 mm ·, and mixed with 2.0 kg of ground silicate block and 4.0 kg of soda (the ratio of components in the charge, respectively, 1.0: 0.20: 0 , 40). The fusion of the mixture and the discharge of the tungstate melt is carried out analogously to example 1. The output of sodium tungstate is

56.1 wt.% Melt, content 76.62%, recovery 96.99%. WOt content, in silicate slag - 3, O4%. ³⁵

The recovery is increased to 99% during the control leaching of silicate slag by water.

to

Implementation of the proposed method will significantly reduce the temperature of the process of separation of the melt (4O0-500 ° C), reduce soda consumption.

If only energy savings are taken into account when processing 1 ton of concentrate per 330 kWh, the annual economic effect will be about 100 thousand rubles.

Claims (2)

  .. I The invention relates to the technology of inorganic substances, in particular, the production of sodium tungstate in can be used in the technology of tungsten tungsten KomteHipaTOB. There is a known method for processing cericulum concentrates by fusing quartz sand at oods at a temp. a {femweem at a temperature of 14OO-15OO ° C, including the separation of fusion products into two immiscible {J2} layers. The disadvantages of this method are the cooling temperature of the fusion process (14OO-15OO C) high soda consumption ( 165% of TNCs.) The purpose of the invention is to reduce the temperature of the cryptossa at which it is soared. 19GSA horsaEpve rssg in vysszha cfd I stump schr & Livestock consumption is achieved by replacing water-based (e) glass (technical module 1.8O) instead of the mine in the mine. Pz this, consisting of a tungsten concentrate, reduced to double bridges, taken in a hot wire 1, OUDD O, 2OK, ZV - O, 4O, melts at iOOQ-l for 2 hours. A good rye layer of fusion Two unmixed layers (silicate slag and tungstate melt) are high, with a degree of drying of 49 ml in concentrate concentrate (up to 97%) with a smaller, compared to the known, consumption of soda (110-115% of TNC). The resulting vonfr. Amate melt is free-flowing and is easily spilled from the crucible. In the silicate asshill there is no more, and in riejpexcoHT lOO% hAn and F6 98%; .. Example. 10, O kg of the secondary content of the composition,%: WO Mn l7.79-.taO 3.50. .ie,, 83f 3.36} Ae., 66t K.0 0.20; O, GO., SL, i9.0 0.06, Pt 0.651 & O, O82 are crushed to a grain size of 0.15 mm and mixed with 1.6 kg ground (up to-0.15 mm) siliceous cob and 3.8 kl soda (the ratio of the components in the mixture, respectively, 1, O: O, 16: O, 38). The mixture is melted at a temperature of lOOO-ilOO C. for 2 hours. Separate melting of the melt and silicate slag is carried out. The output of tungstate sodium with was Bt 59.1% 59.1 of the melt, the content of W / 0 is 77 .52%, the extraction of WOj, is 96.55%. Co-holding of WOj in the slag - 2.84%, Example 2, dkgshev and the total content of the composition,%: J 63,56.httO la.os; Coo 5.o., 64j, 82gA% .0 0.63i. 5.84, H “gO 0.14, Na, 0 0.12; O, 2Ot. 0.92. POM, 68. 0 G, O6 change (ca1dt, to a grain size of -0.15 mm .. and mixed with 2.0 kg of ground silicate lump and 4.0 to soda (the ratio of components in the mixture, respectively, 1, O; O.2O: O, 4O) The fusion of the charge and the discharge of the tungstate melt is carried out analogously to Example 1. The output of sodium tungstate is 56.1% by weight of the melt, the content is .62%, the recovery of Oj is 96.99%. 04 Removing the U / O increases up to 99% during control leaching of silicate slag with water. By the proposed method it will significantly reduce the temperature of the decompression process. Melt (by 4OO-500 C), reduce the consumption of sodi Taking into account only the energy savings when processing 1 ton of concentrate per 330 kWh, the annual economic effect will be about 1OO thousand rubles. by fusing with soda and grain-containing material with the subsequent separation of the melt of the target product from silicate slag, which is characterized by the fact that, in order to reduce the temperature of the fusion alloy and races} (soda, as a silica-containing mat rial used silikatglybu .. 2, The method of claim. 1, and featuring with that volframatsoderzhaishy concentrate, soda and at a ratio silikatglybu -berut. 1SUD6 - O, 2O: 0.38 - O, 40 and the process is carried out at a temperature of lOOO-llOO C. Sources of information taken into account in the examination 1.US Patent: N9 1О89913. cl. 423-32, publ. 1967. 2.Reznichenko V.A., Soloviev V.I. and Bochkov B.A. Metallurgists of vofryma, molybdenum and nyobi .M., Nauka, 1967, p. 61-65.